Catalog - Sterling HVAC

Transcription

GQVC-12
HVAC EQUIPMENT
GAS-FIRED INDOOR HEATING EQUIPMENT
A complete line of efficient heating solutions for large, open spaces.
• 80% thermal efficiency.
• Heat Exchangers have a tough job to do. It's no place for a lightweight. Sterling's minimum metal standard
(aluminized or stainless steel) is 20 gauge.
• Cabinets are strong enough for the contractor to install without added support. Sterling uses 20 gauge panels
and baked enamel on all four sides for that finished look.
• Summer Air. The complete line of Sterling heaters is factory wired for summer air circulation. All that's
needed is the Sterling thermostat (option AS-G3) to provide year round comfort.
• Complete fan guards for added safety. Including optional OSHA type guards.
• Unique burner shade prevents scale from plugging burner ports and hindering unit heater efficiency.
CATALOG CONTENTS
ENERPAK PROPELLER TYPE UNIT HEATERS
100 TO 400 MBH
General Information .................................................................4
Performance and Dimensional Data ....................................5
CABINET BLOWERS
General Information & Motor Data ....................................18
Dimensional Data ...................................................................19
Performance Data ..................................................................20
ENERPAK BLOWER TYPE UNIT HEATERS
100 TO 400 MBH
GENERAL INFORMATION
High Altitude Correction Factor ..........................................21
Sound Rating ...........................................................................21
Gas Heating Valve ..................................................................21
Unit Heater Placement and
Calculating Heat Loss ............................................................22
SEPARATED COMBUSTION PROPELLER TYPE UNIT HEATERS
100 TO 400 MBH
HEAT THROW DATA ........................................................23 & 24
NOZZLE DIMENSIONS ..............................................................25
SEPARATED COMBUSTION BLOWER TYPE UNIT HEATERS
100 TO 400 MBH
General Information ...............................................................10
Performance and Dimensional Data ..................................11
TYPICAL STANDARD SPECIFICATIONS
Enerpak, Duct Furnaces and
Cabinet Blowers ........................................................... 26 & 27
INDOOR DUCT FURNACES
Performance Data and Curves ............................................14
SELECTION GUIDE ......................................................................28
SEPARATED COMBUSTION INDOOR DUCT FURNACE
Performance Data & Curves ...............................................17
WARRANTIES .............................................................................32
OPTIONAL EXTRAS
Optional Descriptions and Order Numbers ............29 & 30
2
THE STERLING ADVANTAGE
Sterling Unit Heaters, offered in both propeller
and blower-type models, are a complete heat
generating and distributing plant, equipped with
automatic controls, and packaged in an
attractive streamlined housing. Designed for
ceiling mounting, they provide a convenient,
low-cost method of heating stores, factories,
warehouses and other large open areas
comfortably.
The Sterling Unit Heater becomes the industry
standard bearer by providing a winning
combination of money saving features and
many other customer benefits. Its innovative
design provides 80% combustion efficiency and
improved seasonal efficiency through integral
power venting and a sealed flue collector. Its
standard fuel efficient spark ignition saves even
more. The pilot only operates when required.
Horizontal power venting allows less costly side
wall venting, smaller openings and single walled
vent pipe.
The Sterling propeller fan, which utilizes a
powerful motor, increases airflow through the
unit - resulting in approximately 10% more CFM.
Summer air circulation for added comfort is
featured on all units, with factory installed relay
and wiring.
Removing just two screws permits ready access
to burners for inspection and servicing.
Unique burner shade prevents scale of foreign
matter from plugging burner ports and hindering
efficiency.
All Sterling Unit Heaters are factory test-fired to assure proper operation.
10-Year Warranty on burners, heat exchanger and flue collector; certified by ETL.
Reduced heat loss, improved efficiencies and higher CFM often allow lower equipment and installation
costs. And because Sterling has a full line of heaters, customers can order the exact unit they need
and avoid money-wasting oversizing. The complete heat exchanger, draft hood assembly and burners of the
propeller and blower of the Sterling Unit Heaters are warranted to be free from defects in materials and
workmanship for a period of 10 years from the date of manufacture.
Sterling, A Mestek Company, has been a major producer of C.S.A. International and ETL certified unit heaters for
over half a century. Rooftop furnaces, evaporative cooling units and packaged heating, ventilating and cooling
systems, enhance Sterling's complete HVAC equipment line.
3
“QVEF” ENERPAK HIGH EFFICIENCY PROPELLER TYPE GAS-FIRED UNIT HEATERS
OUR MOST ENERGY EFFICIENT INDOOR
POWER VENTED GAS-FIRED UNIT HEATER
The Sterling Enerpak Propeller Type Unit Heaters achieve
80% thermal efficiency and annual fuel savings of 20 to
25% over conventional gravity vented heaters. Enerpak
features a factory installed power venter and sealed flue
collector that controls combustion and excess air during
the on-cycle.
LP/NATURAL OPERATION
All units are available for operation on either natural or
LP gas from our factory.
YEAR ROUND COMFORT
Controls are factory wired permitting continuous air
circulation for summer comfort. (Optional Sterling
thermostat - AS-G3 - is added.)
24 VOLT SYSTEM
All units are equipped with a 24 volt control system which
is powered by a 115/24 volt transformer as standard
equipment.
Heated air no longer escapes through a draft diverter
opening during the off-cycle. Energy saving spark ignition
reduces gas losses; the pilot only operates when required.
Horizontal power venting allows side wall venting, smaller
openings and single walled vent pipe, reducing heat loss.
Higher efficiencies can reduce equipment and material
costs as well as installation time. Certified by ETL and
approved for installation in Canada.
FAN TIME DELAY
The fan time delay is mounted at the factory as standard
equipment. This feature eliminates an initial blast of cold
air by allowing the unit to fire for a short period of time
before actuating the fan motor. After the thermostat is
satisfied (with burners off), the fan continues to operate
for approximately 1 minute, removing residual heat from
the heat exchanger.
10-YEAR WARRANTY
The complete heat exchanger, flue collector and burners
are warranted by Sterling HVAC Equipment to be free from
defects in materials and workmanship for a period of ten
(10) years from the date of manufacture.
ENERGY SAVING IGNITION CONTROL (Standard)
The pilot burner is ignited only during each cycle of
operation, thereby conserving energy during the off-cycle.
QUIET OPERATION
Sterling Unit Heaters incorporate exceptionally balanced
fan blades to insure quiet operation and added heat
throw.
EASY ACCESS FOR MAINTENANCE
All Sterling Unit Heaters are so designed that the burner
access panel is removed with just two screws. Burners
are individually removable for inspection and servicing.
Pilot is also accessible through side panel access door,
on 100 thru 400 models.
HEAT EXCHANGERS
All Sterling 20 gauge heat exchangers are available in 3
types of:
• Aluminized Steel (Standard)
• 409 Grade Stainless Steel (Optional)
IDEAL FOR RETROFIT
Sterling Enerpak Units lets you pocket the fuel savings
from Day One, and provides years of dependable operation
with 10-Year Warranty protection.
BURNERS
All sizes 100,000 thru 400,000 BTU/HR (8.8 thru 117.1 kW)
input are equipped with a proven design pressed steel
burner having a unique “burner shade” protective device
to maximize combustion efficiencies by preventing scale
or foreign matter from plugging the burner ports.
TEST FIRE
All Sterling Unit Heaters are test fired to insure proper
operation.
4
ERTEK
INT
CM
QVEF – PERFORMANCE AND DIMENSIONAL DATA
Model QVEF Unit Size
PERFORMANCE DATA ‡
Input BTU/Hr
(kW)
Output BTU/Hr
(kW)
Thermal Efficiency (%)
Free Air Delivery CFM
(cu. m/s)
Air Temperature Rise Deg. F
(Deg. C)
Outlet Velocity FPM
(m/s)
Sound Ratings (See Page 21)
Full Load Amps at 115V
MOTOR DATA : Motor HP
Motor (kW)
Motor Type
R.P.M.
Amps @ 115V
DIMENSIONAL DATA in. (mm)
“A” Height to Top of Unit
“B” Width of Unit
“C” Height to Top of Hanger
“D” Depth to Rear of Housing
“E” Hanging Distance Width
“F” Discharge Opening Width
“G” Depth to Unit Side Jacket
“H” Discharge Opening Height
“J” to Centerline of Flue
“K” Depth to Centerline of Flue
“L” Hanger Location
Flue Size Dia.-in.*
(Dia.-mm)
Fan Diameter-in.
Gas Inlet-Natural Gas-in.
Gas Inlet-LP Gas-in.
Approx. Shipping Wt lb.
(kg)
VER
IFIE D
ENERGY
PERFORMANCE
VERIFIED
RENDEMENT
ENERGETIQUE
VERIFIE
100
125
150
175
200
225
250
300
350
400
100,000
(29.3)
80,000
(23.4)
80
1,480
(0.699)
50
(28)
775
(3.94)
II
5.2
1/20
(0.037)
SP
1,050
2.6
125,000
(36.6)
100,000
(29.3)
80
1,650
(0.779)
56
(31)
910
(4.62)
II
7.2
1/10
(0.075)
SP
1,050
4.2
150,000
(43.9)
120,000
(35.1)
80
2,200
(1.038)
50
(28)
1,045
(5.31)
II
7.8
1/4
(0.186)
PSC
1,140
4.7
175,000
(51.2)
140,000
(41.0)
80
2,530
(1.194)
51
(28)
1,070
(5.44)
III
9.2
1/3
(0.249)
PSC
1,140
5.8
200,000
(58.6)
160,000
(46.9)
80
2,640
(1.246)
56
(31)
1,010
(5.13)
III
9.2
1/3
(0.249)
PSC
1,140
5.8
225,000
(65.9)
180,000
(52.7)
80
2,700
(1.274)
61
(34)
950
(4.83)
III
9.2
1/3
(0.249)
PSC
1,140
5.8
250,000
(73.2)
200,000
(58.6)
80
3,100
(1.463)
60
(33)
980
(4.98)
IV
9.2
1/3
(0.249)
PSC
1,140
5.8
300,000
(87.8)
240,000
(70.3)
80
4,400
(2.077)
50
(28)
1,100
(5.59)
IV
12.5
(2) 1/4
(0.186)
PSC
1,140
9.4
350,000
(102.5)
280,000
(82.0)
80
5,000
(2.360)
52
(29)
1,150
(5.84)
IV
15.0
(2) 1/3
(0.249)
PSC
1,140
11.6
400,000
(117.1)
320,000
(93.7)
80
5,300
(2.502)
56
(31)
1,050
(5.33)
IV
15.0
(2) 1/3
(0.249)
PSC
1,140
11.6
31-1/4
(794)
17-7/8
(454)
34-1/8
(867)
37-1/2
(952)
14-1/2
(368)
15-3/8
(391)
26-3/4
(492)
18
(457)
5-7/8
(149)
30-5/8
(778)
16-1/4
(413)
4
(102)
14
1/2
1/2
174
(79)
31-1/4
(794)
20-5/8
(524)
34-1/8
(867)
37-1/2
(952)
17-1/4
(438)
18-1/8
(460)
26-3/4
(492)
18
(457)
7-1/4
(184)
30-5/8
(778)
16-3/4
(425)
4
(102)
16
1/2
1/2
197
(89)
36-1/4
(921)
20-5/8
(524)
39-1/8
(994)
37-1/2
(952)
17-1/4
(438)
18-1/8
(460)
26-3/4
(679)
18
(457)
7-1/4
(184)
30-5/8
(778)
16-3/8
(416)
4
(102)
16
1/2
1/2
219
(99)
36-1/4
(921)
23-3/8
(594)
39-1/8
(994)
37-1/2
(952)
20
(508)
20-7/8
(530)
26-3/4
(679)
18
(457)
8-5/8
(219)
30-5/8
(778)
16-3/8
(416)
4
(102)
18
1/2
1/2
238
(108)
36-1/4
(921)
26-1/8
(664)
39-1/8
(994)
37-1/2
(952)
22-3/4
(578)
23-5/8
(600)
26-3/4
(679)
18
(457)
10
(254)
30-5/8
(778)
16-3/8
(416)
5
(127)
18
1/2
1/2
249
(113)
36-1/4
(921)
28-7/8
(733)
39-1/8
(994)
37-1/2
(952)
25-1/2
(648)
26-3/8
(670)
26-3/4
(679)
18
(457)
11-1/4
(286)
30-5/8
(778)
16-3/4
(425)
5
(127)
18
3/4
←
275
(125)
36-1/4
(921)
31-5/8
(803)
39-1/8
(994)
37-1/2
(952)
28-1/4
(718)
29-1/8
(740)
26-3/4
(679)
18
(457)
12-3/4
(324)
30-5/8
(778)
16-3/4
(425)
5
(127)
18
3/4
36-1/4
(921)
37-1/8
(943)
39-1/8
(994)
37-1/2
(952)
33-3/4
(857)
34-5/8
(879)
26-3/4
(679)
18
(457)
15-1/2
(394)
30-5/8
(778)
16-3/4
(425)
6
(152)
(2) 16
3/4
1/2 OR 3/4
350
(159)
36-1/4
(921)
42-5/8
(1083)
39-1/8
(994)
37-1/2
(952)
39-1/4
(997)
40-1/8
(1019)
26-3/4
(679)
18
(457)
18-1/4
(464)
30-5/8
(778)
16-3/4
(425)
6
(152)
(2) 18
3/4
36-1/4
(921)
48-1/8
(1222)
39-1/8
(994)
37-1/2
(952)
44-3/4
(1137)
45-5/8
(1159)
26-3/4
(679)
18
(457)
21
(533)
30-5/8
(778)
16-3/4
(425)
6
(152)
(2) 18
3/4
→
461
(209)
‡ Ratings shown are for unit installations
at elevations between 0 and 2000 ft.
(610m). For unit installations in USA
above 2000 ft. (610m), the unit input
must be derated 4% for each 1000 ft.
(305m) above sea level; refer to local
codes, or in absence of local codes,
refer to the latest edition of the National
Fuel Gas Code ANSI Standard Z223.1
(N.F.P.A. No. 54).
For installations in Canada, any references to deration at altitudes in excess
of 2000 ft. (610m) are to be ignored.
At altitudes of 2000 to 4500 ft. (610 to
1372m), the unit must be derated to 90%
of the normal altitude rating, and be
so marked in accordance with the ETL
certification.
LEGEND: SP = SHADED POLE
PSC = PERMANENT SPLIT
CAPACITOR
DIMENSIONS .XXX STANDARD UNITS
DIMENSIONS IN PARENTHESIS (XXX) MILLIMETERS
5
305
(138)
414
(188)
“QVEB” ENERPAK HIGH EFFICIENCY BLOWER TYPE GAS-FIRED UNIT HEATERS
The advanced Sterling ENERPAK Blower Type Unit Heater
keeps energy costs down. The design advances achieve
80% thermal efficiency and annual fuel savings of up to
25% over conventional gravity vented heaters.
YEAR ROUND COMFORT
Controls are factory wired to permit continuous air
circulation for summer comfort (Just add optional Sterling
thermostat “AS-G3”).
The Sterling Enerpak features integral power venting
(factory installed) and sealed flue collector for optimum
combustion. Electronic spark ignition reduces pilot gas
losses, and the power venter allows for horizontal venting
through side walls. It all adds up to higher seasonal
efficiencies and lower installation time. Certified by ETL
and approved for use in Canada.
24 VOLT SYSTEM
equipment.
TEN-YEAR WARRANTY
The complete heat exchanger, flue collector and burner
are warranted by Sterling HVAC Equipment to be free from
defects in materials and workmanship for a period of ten
(10) years from the date of manufacture.
FAN TIME DELAY
The fan time delay switch is mounted at the factory as
standard equipment. This feature eliminates an initial
blast of cold air by allowing the unit to fire for a short
period of time before actuating the fan motor. After the
thermostat is satisfied (with burners off) the fan continues
to operate for approximately 1 minute, removing residual
heat from the heat exchanger.
QUIET OPERATION
Sterling Unit Heaters incorporate an exceptional balanced
centrifugal blower to insure quiet operation.
HEAT EXCHANGERS
All Sterling 20 gauge heat exchangers are available in 3
types of steel:
ENERGY SAVING IGNITION CONTROL (Standard)
The pilot burner is ignited only during each cycle of
operation, thereby conserving energy during the off-cycle.
All Sterling Unit Heaters are so designed that the burner
access panel may be removed for inspection and servicing.
Pilot is also accessible through side panel access door.
BURNERS
burner having a unique “burner shade” protective
device to prevent scale or foreign matter from plugging
the burner ports.
IDEAL FOR RETROFIT
Sterling Enerpak Units lets you pocket the fuel savings
from Day One, and provides years of dependable operation.
TEST FIRE
operation.
6
ERTEK
INT
CM
QVEB – PERFORMANCE AND DIMENSIONAL DATA
Model QVEB Unit Size
Input BTU/Hr
(kW)
Output BTU/Hr
(kW)
(cu. m/s)
Air Temperature Rise Deg. F
(Deg. C)
Outlet Velocity FPM
(m/s)
MOTOR DATA : Motor HP
Motor (kW)
Motor Type
R.P.M.
Amps @ 115V
“B” Width of Unit
“C” Height to Top of Hanger
“D” Depth to Rear of Housing
“E” Hanging Distance Width
“F” Discharge Opening Width
“J” to Centerline of Flue
“L” Hanger Location
“M” Hanging Distance Depth
Flue Size Dia-in. *
(Dia-mm)
Blower Size-in.
Approx. Shipping Wt. lb.
(kg)
VER
IFIE D
ENERGY
PERFORMANCE
VERIFIED
RENDEMENT
ENERGETIQUE
VERIFIE
100
125
150
175
200
225
250
300
350
400
100,000
(29.3)
80,000
(23.4)
80
1,200
(0.566)
62
(34)
880
(4.47)
8.3
1/4
(0.19)
SPH
1,725
5.1
125,000
(36.6)
100,000
(29.3)
80
1,575
(0.743)
59
(33)
950
(4.83)
9.8
1/3
(0.25)
SPH
1,725
6.6
150,000
(43.9)
120,000
(35.1)
80
1,975
(0.932)
56
(31)
1,030
(5.23)
10.6
1/2
(0.37)
SPH
1,725
7.4
175,000
(51.2)
140,000
(41.0)
80
2,300
(1.086)
56
(31)
1,045
(5.31)
10.6
1/2
(0.37)
SPH
1,725
7.4
200,000
(58.6)
160,000
(46.9)
80
2,400
(1.133)
62
(34)
965
(4.90)
15.2
3/4
(0.56)
SPH
1,725
12.0
225,000
(65.9)
180,000
(52.7)
80
2,600
(1.227)
64
(36)
935
(4.75)
15.2
3/4
(0.56)
SPH
1,725
12.0
250,000
(73.2)
200,000
(58.6)
80
2,850
(1.345)
65
(36)
930
(4.72)
15.2
3/4
(0.56)
SPH
1,725
12.0
300,000
(87.8)
240,000
(70.3)
80
3,950
(1.864)
56
(31)
1,080
(5.49)
15.2
3/4
(0.56)
SPH
1,725
12.0
350,000
(102.5)
280,000
(82.0)
80
4,600
(2.171)
56
(31)
1,090
(5.54)
18.6
1
(0.75)
cap.start
1,725
15.4
400,000
(117.1)
320,000
(93.7)
80
4,800
(2.266)
62
(34)
1,000
(5.08)
18.6
1
(0.75)
cap.start
1,725
15.4
31-1/4
(794)
17-7/8
(454)
34-1/8
(867)
42-5/8
(1083)
14-1/2
(368)
15-3/8
(391)
5-7/8
(149)
16-3/8
(416)
16-3/8
(416)
4
(102)
9
1/2
1/2
262
(119)
31-1/4
(794)
20-5/8
(524)
34-1/8
(867)
44-1/4
(1124)
17-1/4
(438)
18-1/8
(460)
7-1/4
(184)
16-3/8
(416)
16-3/8
(416)
4
(102)
10
1/2
1/2
279
(127)
36-1/4
(921)
20-5/8
(524)
39-1/8
(994)
44-1/4
(1124)
17-1/4
(438)
18-1/8
(460)
7-1/4
(184)
16-3/8
(416)
16-3/8
(416)
4
(102)
10
1/2
1/2
314
(142)
36-1/4
(921)
23-3/8
(594)
39-1/8
(994)
47
(1194)
20
(508)
20-7/8
(530)
8-5/8
(219)
16-3/8
(416)
17-7/8
(454)
4
(102)
12
1/2
1/2
336
(152)
36-1/4
(921)
26-1/8
(664)
39-1/8
(994)
47
(1194)
22-3/4
(578)
23-5/8
(600)
10
(254)
16-3/8
(416)
17-7/8
(454)
5
(127)
12
1/2
1/2
363
(165)
36-1/4
(921)
28-7/8
(733)
39-1/8
(994)
51
(1295)
25-1/2
(648)
26-3/8
(670)
11-1/4
(286)
16-3/8
(416)
21-7/8
(556)
5
(127)
12
3/4
〈
408
(185)
36-1/4
(921)
31-5/8
(803)
39-1/8
(994)
51
(1295)
28-1/4
(718)
29-1/8
(740)
12-3/4
(324)
16-3/8
(416)
21-7/8
(556)
5
(127)
12
3/4
36-1/4
(921)
37-1/8
(943)
39-1/8
(994)
48-1/4
(1226)
33-3/4
(857)
34-5/8
(879)
15-1/2
(394)
16-3/8
(416)
21-7/8
(556)
6
(152)
(2) 10
3/4
1/2 OR 3/4
471
(214)
36-1/4
(921)
42-5/8
(1083)
39-1/8
(994)
51
(1295)
39-1/4
(997)
40-1/8
(1019)
18-1/4
(464)
16-3/8
(416)
21-7/8
(556)
6
(152)
(2) 12
3/4
36-1/4
(921)
48-1/8
(1222)
39-1/8
(994)
51
(1295)
44-3/4
(1137)
45-5/8
(1159)
21
(533)
16-3/8
(416)
21-7/8
(556)
6
(152)
(2) 12
3/4
〉
594
(269)
427
(194)
561
(254)
‡ Ratings shown are for unit installations at elevations between 0 and 2000 ft. (610m). For unit installations in USA above 2000 ft. (610m), the unit input must be derated 4% for each 1000 ft. (305m) above
sea level; refer to local codes, or in absence of local codes, refer to the latest edition of the National Fuel Gas Code ANSI Standard Z223.1 (N.F.P.A. No. 54).
For installations in Canada, any references to deration at altitudes in excess of 2000 ft. (610m) are to be ignored. At altitudes of 2000 to 4500 ft. (610 to 1372m), the unit must be derated to 90% of the
normal altitude rating, and be so marked in accordance with the ETL certification.
LEGEND: SPH = SPLIT PHASE
CAP. START = CAPACITOR START
7
“QVSF” SEPARATED COMBUSTION PROPELLER TYPE UNIT HEATER
The Sterling Separated Combustion Propeller Type Unit
Heater keeps energy costs down by offering 80% thermal
efficiencies. With model inputs available from 100 thru
400 MBH, they are designed to be installed in mildly
hostile environments where dusty, dirty and mildly
corrosives exist or high humidity or slightly negative
pressures prevail.
BURNERS
burner having a unique “shaded port” protective device to
prevent scale and debris from plugging the burner ports.
The Sterling model QVSF propeller unit separates the
combustion process from the environment where the unit
is installed. A power venting system draws a controlled
quantity of combustion air from outside the building. The
same system exhausts flue gas products to the outside.
The burners, pilot and flue system are enclosed within the
unit. The entire combustion process is literally unaffected
by the atmosphere in the space where the unit is located.
24 VOLT SYSTEM
equipment.
FAN TIME DELAY
standard equipment. This feature eliminates the initial
period of time prior to the actuating the fan motor. After
the thermostat is satisfied (with burners off) the fan
continues to operate for approximately 1 minute, removing
residual heat from the heat exchanger.
Combustion and exhaust air may be piped horizontally
through a side wall, or vertically through the roof via our
standard 2 pipe venting arrangement or optional concentric
vent kit which utilizes one 8" side wall or rooftop penetration
for both the combustion and exhaust air. Both venting
systems are ETL certified.
The Sterling Separated Combustion Units are designed so
that the bottom hinged access panel drops down for quick
and easy burner inspection and removal.
TYPICAL INSTALLATIONS
• Industrial work areas with wood or textile dust
• Non-explosive contaminated environments
• Non-chlorine process areas
• Automotive and truck garages
• Greenhouses
TEST FIRE
operation.
HEAT EXCHANGERS
All heat exchangers feature 20 gauge tubes and 18 gauge
headers and are available in 3 types of steel:
• 409 Grade Steel Stainless Steel (Optional)
8
ERTEK
INT
CM
QVSF – PERFORMANCE AND DIMENSIONAL DATA
Model QVSF Unit Size
Input BTU/Hr
(kW)
Output BTU/Hr
(kW)
(cu. m/s)
Air Temperature Rise Deg. F.
(Deg. C)
Outlet Velocity FPM
(m/s)
MOTOR DATA: Motor HP
Motor (kW)
Motor Type
R.P.M.
Amps @ 115V
“B” Height to Top of Hanger
“C” Hanging Distance Width
“D” Discharge Opening Width
“E” Width of Unit
“F” to Centerline of Flue
Flue Size Dia-in.**
(Dia mm)
Air Inlet Size-in.
(mm)
Fan Diameter-in.
(kg)
VER
IFIE D
ENERGY
PERFORMANCE
VERIFIED
RENDEMENT
ENERGETIQUE
VERIFIE
100
125
150
175
200
225
250
300
350
400
100,000
(29.3)
80,000
(23.4)
80
1,480
(0.699)
50
(28)
775
(3.9)
5.8
1/20
(0.037)
SP
1,050
2.6
125,000
(36.6)
100,000
(29.3)
80
1,650
(0.779)
56
(31)
910
(4.6)
6.0
1/10
(0.075)
SP
1,050
2.8
150,000
(43.9)
120,000
(35.1)
80
2200
(1.038)
50
(28)
1045
(5.3)
7.2
1/4
(0.186)
PSC
1,140
4.0
175,000
(51.2)
140,000
(41.0)
80
2,530
(1.194)
51
(28)
1070
(5.4)
7.8
1/3
(0.249)
PSC
1,140
4.5
200,000
(58.6)
160,000
(46.9)
80
2,640
(1.246)
56
(31)
1000
(5.1)
7.8
1/3
(0.249)
PSC
1,140
4.5
225,000
(65.9)
180,000
(52.7)
80
2,700
(1.274)
61
(34)
950
(4.8)
7.8
1/3
(0.249)
PSC
1,140
4.5
250,000
(73.2)
200,000
(58.6)
80
3,100
(1.463)
60
(33)
980
(5.0)
8.8
1/2
(0.373)
PSC
1,140
5.5
300,000
(87.8)
240,000
(70.3)
80
4,400
(2.077)
50
(28)
1100
(5.6)
11.2
(2)1/4
(0.186)
PSC
1,140
8.0
350,000
(102.5)
280,000
(82.0)
80
5,000
(2.360)
52
(29)
1150
(5.8)
12.2
(2)1/3
(0.249)
PSC
1,140
9.0
400,000
(117.1)
320,000
(93.7)
80
5,300
(2.502)
56
(31)
1050
(5.3)
12.2
(2)1/3
(0.249)
PSC
1,140
9.0
31-1/4
(794)
34-1/16
(865)
14-3/4
(375)
15-3/8
(391)
17-7/8
(454)
5-7/8
(149)
4
(102)
4
(102)
14
1/2
1/2
200
(91)
31-1/4
(794)
34-1/16
(865)
17-1/2
(445)
18-1/8
(460)
20-5/8
(524)
7-1/4
(184)
4
(102)
4
(102)
16
1/2
1/2
228
(103)
36-1/4
(921)
39-1/16
(992)
17-1/2
(445)
18-1/8
(460)
20-5/8
(524)
7-1/4
(184)
4
(102)
4
(102)
16
1/2
1/2
256
(116)
36-1/4
(921)
39-1/16
(992)
20-1/4
(514)
20-7/8
(530)
23-3/8
(594)
8-5/8
(219)
4
(102)
4
(102)
18
1/2
1/2
284
(129)
36-1/4
(921)
39-1/16
(992)
23
(584)
23-5/8
(600)
26-1/8
(664)
10
(254)
5
(127)
5
(127)
18
1/2
1/2
312
(142)
36-1/4
(921)
39-1/16
(992)
25-3/4
(654)
26-3/8
(670)
28-7/8
(733)
11-1/4
(286)
5
(127)
5
(127)
18
3/4
〈
340
(154)
36-1/4
(921)
39-1/16
(992)
28-1/2
(724)
29-1/8
(740)
31-5/8
(803)
12-3/4
(324)
5
(127)
5
(127)
18
3/4
36-1/4
(921)
39-1/16
(992)
34
(864)
34-5/8
(879)
37-1/8
(943)
15-1/2
(394)
6
(152)
6
(152)
16
3/4
1/2 or 3/4
432
(196)
36-1/4
(921)
39-1/16
(992)
39-1/2
(1003)
40-1/8
(1019)
42-5/8
(1083)
18-1/4
(464)
6
(152)
6
(152)
18
3/4
36-1/4
(921)
39-1/16
(992)
45
(1143)
45-5/8
(1159)
48-1/8
(1222)
21
(533)
6
(152)
6
(152)
18
3/4
〉
545
(247)
368
(167)
488
(221)
PSC = PERMANENT SPLIT CAPACITOR
9
“QVSB” SEPARATED COMBUSTION BLOWER TYPE UNIT HEATER
BURNERS
burner having a unique “shaded port” protective device to
prevent scale and debris from plugging the burner ports.
The Sterling Separated Combustion Blower Type Unit
Heater keeps energy costs down by offering 80% thermal
efficiencies. With model inputs available from 100 thru 400
MBH they are designed to be installed in mildly hostile
environments where dusty, dirty and mildly corrosives
exist or high humidity or slightly negative pressures
prevail. The QVSB operates at a static pressure up to
.2" W.C. and is available with a (standard) louvered or
(optional) flanged outlet when discharge duct work is
desired.
24 VOLT SYSTEM
equipment.
The Sterling model QVSB blower unit separates the
is installed. A power venting system draws a controlled
quantity of combustion air from outside the building. The
same system exhausts flue gas products to the outside.
The burners, pilot and flue system are enclosed within the
unit. The entire combustion process is literally unaffected
by the atmosphere in the space where the unit is located.
FAN TIME DELAY
standard equipment. This feature eliminates the initial
period of time prior to the actuating the fan motor. After
the thermostat is satisfied (with burners off) the fan
continues to operate for approximately 1 minute, removing
residual heat from the heat exchanger.
Combustion and exhaust air may be piped horizontally
through a side wall, or vertically through the roof via our
standard 2 pipe venting arrangement or optional
concentric vent kit which utilizes one 8" side wall or
rooftop penetration for both the combustion and exhaust
air. Both venting systems are ETL certified.
The Sterling Separated Combustion Units are designed so
that the bottom hinged access panel drops down for quick
and easy burner inspection and removal.
TYPICAL INSTALLATIONS
• Industrial work areas with wood or textile dust
• Non-explosive contaminated environments
• Non-chlorine process areas
• Automotive and truck garages
• Greenhouses
TEST FIRE
operation.
HEAT EXCHANGERS
• 409 Grade Steel Stainless Steel (Optional)
10
ERTEK
INT
CM
QVSB – PERFORMANCE AND DIMENSIONAL DATA
Model QVSB Unit Size
Input BTU/Hr
(kW)
Output BTU/Hr
(kW)
(cu. m/s)
Air Temperature Rise Deg. F.
(Deg. C)
Outlet Velocity FPM
(m/s)
MOTOR DATA: Motor HP
Motor (kW)
Motor Type
R.P.M.
Amps @ 115V
“B” Height to Top of Hanger
“C” Hanging Distance Width
“D” Discharge Opening Width
“E” Width of Unit
“F” to Centerline of Flue
“G” Hanging Distance Depth
“H” Depth to Rear of Housing
Flue Size Dia-in.**
(Dia-mm)
Air Inlet Size-in.
(mm)
Blower Size-in.
(kg)
VER
IFIE D
ENERGY
PERFORMANCE
VERIFIED
RENDEMENT
ENERGETIQUE
VERIFIE
100
125
150
175
200
225
250
300
350
400
100,000
(29.3)
80,000
(23.4)
80
1,200
(0.566)
62
(34)
880
(4.47)
8.3
1/4
(0.19)
SPH
1725
5.1
125,000
(36.6)
100,000
(29.3)
80
1,575
(0.743)
59
(33)
950
(4.83)
9.8
1/3
(0.25)
SPH
1725
6.6
150,000
(43.9)
120,000
(35.1)
80
1,975
(0.932)
56
(31)
1030
(5.23)
10.6
1/2
(0.37)
SPH
1725
7.4
175,000
(51.2)
140,000
(41.0)
80
2,300
(1.086)
56
(31)
1045
(5.31)
10.6
1/2
(0.37)
SPH
1725
7.4
200,000
(58.6)
160,000
(46.9)
80
2,400
(1.133)
62
(34)
965
(4.90)
15.2
3/4
(0.56)
SPH
1725
12.0
225,000
(65.9)
180,000
(52.7)
80
2,600
(1.227)
64
(36)
935
(4.75)
15.2
3/4
(0.56)
SPH
1725
12.0
250,000
(73.2)
200,000
(58.6)
80
2,850
(1.345)
65
(36)
930
(4.72)
15.2
3/4
(0.56)
SPH
1725
12.0
300,000
(87.8)
240,000
(70.3)
80
3,950
(1.864)
56
(31)
1080
(5.49)
15.2
3/4
(0.56)
SPH
1725
12.0
350,000
(102.5)
280,000
(82.0)
80
4,600
(2.171)
56
(31)
1090
(5.54)
18.6
1
(0.75)
cap.start
1725
15.4
400,000
(117.1)
320,000
(93.7)
80
4,800
(2.266)
62
(34)
1000
(5.08)
18.6
1
(0.75)
cap.start
1725
15.4
31-1/4
(794)
34-1/16
(865)
14-3/4
(375)
15-3/8
(391)
17-7/8
(454)
5-7/8
(149)
18-1/2
(470)
42-3/4
(1086)
4
(102)
4
(102)
9
1/2
1/2
298
(135)
31-1/4
(794)
34-1/16
(865)
17-1/2
(444)
18-1/8
(460)
20-5/8
(524)
7-1/4
(184)
18-1/2
(470)
44-3/8
(1127)
4
(102)
4
(102)
10
1/2
1/2
330
(150)
36-1/4
(921)
39-1/16
(992)
17-1/2
(444)
18-1/8
(460)
20-5/8
(524)
7-1/4
(184)
18-1/2
(470)
44-3/8
(1127)
4
(102)
4
(102)
10
1/2
1/2
362
(164)
36-1/4
(921)
39-1/16
(992)
20-1/4
(514)
20-7/8
(530)
23-3/8
(594)
8-5/8
(219)
20
(508)
47-3/16
(1199)
4
(102)
4
(102)
12
1/2
1/2
394
(179)
36-1/4
(921)
39-1/16
(992)
23
(584)
23-5/8
(600)
26-1/8
(664)
10
(254)
20
(508)
47-3/16
(1199)
5
(127)
5
(127)
12
1/2
1/2
426
(193)
36-1/4
(921)
39-1/16
(992)
25-3/4
(654)
26-3/8
(670)
28-7/8
(733)
11-1/4
(286)
23
(584)
50-7/8
(1292)
5
(127)
5
(127)
12
3/4
〈
458
(208)
36-1/4
(921)
39-1/16
(992)
28-1/2
(724)
29-1/8
(740)
31-5/8
(803)
12-3/4
(324)
23
(584)
48
(1219)
5
(127)
5
(127)
12
3/4
36-1/4
(921)
39-1/16
(992)
34
(864)
34-5/8
(879)
37-1/8
(943)
15-1/2
(394)
23
(584)
50-7/8
(1292)
6
(152)
6
(152)
(2)10
3/4
1/2 or 3/4
558
(253)
36-1/4
(921)
39-1/16
(992)
39-1/2
(1003)
40-1/8
(1019)
42-5/8
(1083)
18-1/4
(464)
23
(584)
50-7/8
(1292)
6
(152)
6
(152)
(2)12
3/4
36-1/4
(921)
39-1/16
(992)
45
(1143)
45-5/8
(1159)
48-1/8
(1222)
21
(533)
23
(584)
51
(1295)
6
(152)
6
(152)
(2)12
3/4
〉
678
(308)
490
(222)
618
(280)
CAP. START = CAPACITOR START
11
INDOOR DUCT FURNACE
Sterling Indoor Duct Furnaces are 80% efficient and are designed for ducted air applications. These are typically built
up systems using a separate air moving device and may be heating only or heating and air conditioning applications. All
Sterling duct furnaces are ETL certified for installation upstream or downstream from cooling coils (stainless steel heat
exchangers are recommended).
HEAT EXCHANGERS
MODEL QVED
We recommend stainless steel for applications where
entering air is below 40° F. (4.4° C.) and/or duct furnaces
are located downstream from cooling coils.
The QVED model features integral power venting, sealed
flue collecter and electronic spark ignition. Annual fuel
savings and seasonal efficiency are increased while
reducing installation time. Unit has bottom access for
burner servicing. Certified by ETL and approved for use
in Canada.
AVAILABLE MODELS
MODEL QVES
All models are offered in 10 capacities from 100,000 to
400,000 BTU/HR (29.3 thru 117.1 kW). All models are test
fired at our factory, may be ordered equipped for LP
or natural gas, are tested to operate against 2.0 inches
(0.5 kPa) water column pressure and may be ordered
with right (std.) or left hand (opt.) control access.
Offering the same features as the QVED except that the
QVES has a side access burner drawer which slides out
for servicing, reducing bottom clearance requirements.
MODEL QVES
12
DETAILS AND DIMENSIONS
QVED Power Vented Duct Furnace — Bottom Service Acccess
Power Vented Duct Furnace (QVED/QVES)
UNIT
A
B
C
D (Dia)*
F
GAS INLET
SIZE
in.
in.
in.
in.
in.
in.
(mm)
(mm)
(mm)
(mm)
(mm)
NAT.
LP
17-7/8
15-1/2
17-1/8
4
23-7/8
1/2
1/2
(454)
(394)
(435)
(102)
(606)
20-5/8
18-1/4
19-7/8
4
25-5/8
(524)
(464)
(505)
(102)
(651)
20-5/8
18-1/4
19-7/8
4
26-5/8
(524)
(464)
(505)
(102)
(676)
23-3/8
21
22-5/8
4
29-3/8
(594)
(533)
(575)
(102)
(746)
26-1/8
23-3/4
25-3/8
5
32-1/8
(664)
(603)
(645)
(127)
(816)
28-7/8
26-1/2
28-1/8
5
34-7/8
(733)
(673)
(714)
(127)
(886)
31-5/8
29-1/4
30-7/8
5
37-5/8
(803)
(743)
(784)
(127)
(956)
37-1/8
34-3/4
36-3/8
6
43-1/8
(943)
(883)
(924)
(152)
(1095)
42-5/8
40-1/4
41-7/8
6
48-5/8
(1083)
(1022)
(1064)
(152)
(1235)
48-1/8
45-3/4
47-3/8
6
54-1/8
(1222)
(1162)
(1203)
(152)
(1375)
100
125
150
175
200
225
250
300
350
400
WEIGHT
lb.
(kg)
173
(78)
1/2
1/2
186
(84)
1/2
1/2
197
(89)
1/2
1/2
216
(98)
1/2
1/2
232
(105)
3/4
1/2 OR 3/4
254
(115)
3/4
1/2 OR 3/4
263
(119)
3/4
1/2 OR 3/4
312
(142)
3/4
1/2 OR 3/4
389
(176)
3/4
1/2 OR 3/4
403
(183)
QVES Power Vented Duct Furnace — Side Service Access
13
DUCT FURNACE – PERFORMANCE DATA
INPUT
OUTPUT
(MAX)
(MIN)
MIN.
Temp. Rise
P.D.
MAX.
Temp. Rise
P.D.
UNIT
MBH
MBH
MBH
CFM
Deg. F.
in. of W.C.
CFM
Deg. F.
in. of W.C.
SIZE
(kW)
(kW)
(kW)
(cu. m/s)
(Deg. C.)
(kPa)
(cu. m/s)
(Deg. C.)
(Pascals)
100
100
50
80
929
80
0.12
2469
30
0.90
(29.3)
(14.6)
(23.4)
(0.438)
(44)
(0.03)
(1.165)
(17)
(0.22)
125
125
62.5
100
1157
80
0.13
3086
30
0.80
(36.6)
(18.3)
(29.3)
(0.546)
(44)
(0.03)
(1.457)
(17)
(0.20)
150
150
75
120
1389
80
0.15
3704
30
0.75
(43.9)
(22.0)
(35.1)
(0.656)
(44)
(0.04)
(1.748)
(17)
(0.19)
175
175
87.5
140
1620
80
0.14
4321
30
0.75
(51.2)
(25.6)
(41.0)
(0.765)
(44)
(0.03)
(2.040)
(17)
(0.19)
200
200
100
160
1852
80
0.14
4938
30
0.75
(58.6)
(29.3)
(46.9)
(0.874)
(44)
(0.03)
(2.331)
(17)
(0.19)
225
225
112.5
180
2083
80
0.14
5556
30
0.75
(65.9)
(32.9)
(52.7)
(0.983)
(44)
(0.03)
(2.622)
(17)
(0.19)
250
250
125
200
2315
80
0.14
6173
30
0.80
(73.2)
(36.6)
(58.6)
(1.093)
(44)
(0.03)
(2.914)
(17)
(0.20)
300
300
150
240
2778
80
0.13
7407
30
0.90
(87.8)
(43.9)
(70.3)
(1.311)
(44)
(0.03)
(3.496)
(17)
(0.22)
350
350
175
280
3241
80
0.13
8642
30
0.90
(102.5)
(51.2)
(82.0)
(1.530)
(44)
(0.03)
(4.079)
(17)
(0.22)
400
400
200
320
3704
80
0.14
9877
30
0.90
(117.1)
(58.6)
(93.7)
(1.748)
(44)
(0.03)
(4.662)
(17)
(0.22)
NOTE: Ratings shown are for unit installations at elevations between 0 and 2000 ft. (610m). For unit installations in USA above 2000 ft. (610m), the unit input must be derated
4% for each 1000 ft. (305m) above sea level; refer to local codes, or in absence of local codes, refer to the National Fuel Gas Code, the latest edition of ANSI Standard Z223.1
(N.F.P.A. No. 54). For installations in Canada, any references to deration at altitudes in excess of 2000 ft. (610m) are to be ignored. At altitudes of 2000 to 4500 ft. (610 to 1372m),
the unit must be derated to 90% of the normal altitude rating, and be so marked in accordance with the ETL certification.
TEMPERATURE RISE AND PRESSURE DROP GRAPH
14
“QVSD” SEPARATED COMBUSTION INDOOR DUCT FURNACE
All models are equipped with electronic spark ignition
(100% safety shutoff on LP models), 115 volt power, vent
system pressure switch, high limit switch and 24 volt
control transformer.
Sterling Separated Combustion Indoor Duct Furnace is
designed for installation in mildly hostile environments.
The Separated Combustion Duct Furnace is available in
sizes ranging from 100 to 400 MBTU (29.3 to 117.1 kW)
inputs and offers a variety of optional equipment.
All models are factory assembled with a horizontal flue
discharge position. A vertical flue position may be altered
in the field.
APPLICATIONS
The QVSD Separated Combustion Duct Furnace is
designed to be installed in dusty, dirty or mildly corrosive
environments, or where high humidity or slightly negative
pressures exist. Ideal applications include HVAC
equipment rooms, manufacturing facilities, automotive
garages and greenhouses.
All models must be vented utilizing our certified standard
two-pipe method or optional concentric adaptor kit.
CAUTIONS
• Combustion air and vent systems must be installed in
accordance with National Fuel Gas Code or Installation
Code for Natural Gas Burning Appliances and
Equipment (Canada).
• Local and State authorities should also be consulted to
determine their requirements.
• Units should not be installed where negative pressures
are significant.
• Units should not be installed where vapors containing
chlorine or fluorine may be present. Care should be
taken not to draw combustion air from or near a
contaminated environment.
• Units should not be installed in areas classified as
“hazardous”.
DESCRIPTIONS
The QVSD Combustion Duct Furnace “separates” the
is installed. A power venting system draws controlled
amount of combustion air from outside of the building. The
same system exhausts the flue gases to the outside. The
burners, pilot and flue system are totally enclosed within
the unit, thus the entire combustion process is literally
unaffected by the atmosphere in the space where the
Duct Furnace is located.
ADDITIONAL FEATURES
• ETL certified as 80% efficient.
• Unit’s interior components fully accessible via bottom
access door.
• Factory equipped with an electronic spark ignition
system.
• Rugged 20 gauge heat exchanger and jacketry.
• Available in both right or left hand control access
configurations.
• 2 styles of ETL approved venting systems: two pipe or
concentric. Two pipe system allows for two (4", 5" or 6")
individual building terminations. The concentric adapter
kit utilizes one 8" termination in which both the flue gas
and combustion air passes.
SPECIFICATION GUIDE - MODEL QVSD
Sterling Model QVSD Separated Combustion Duct
Furnaces are completely factory assembled, piped, wired
and test fired. All models are ETL certified as having 80%
thermal efficiency. This certification includes operation on
either natural of LP (propane) gas. All models conform to
the latest ANSI Standards for safe operation.
Casings are die-formed 20-gauge bonderized steel,
finished in baked enamel. Heat exchangers consist of
20-gauge tubes and 18-gauge headers. Heat exchangers
are available in aluminized steel, 409 stainless steel and
type 321 stainless steel. Burners are individually
removable, die-formed and feature stainless steel port
protectors. Burners are available in aluminized or type 409
stainless steel.
15
DETAILS AND DIMENSIONS
Separated Combustion Indoor Duct Furnace (QVSD)
UNIT
SIZE
100
125
150
175
200
225
250
300
350
400
A
in.
(mm)
17-7/8
(454)
20-5/8
(524)
20-5/8
(524)
23-3/8
(594)
26-1/8
(664)
28-7/8
(733)
31-5/8
(803)
37-1/8
(943)
42-5/8
(1083)
48-1/8
(1222)
B
in.
(mm)
15-1/2
(394)
18-1/4
(464)
18-1/4
(464)
21
(533)
23-3/4
(603)
26-1/2
(673)
29-1/4
(743)
34-3/4
(883)
40-1/4
(1022)
45-3/4
(1162)
C
in.
(mm)
17-1/8
(435)
19-7/8
(505)
19-7/8
(505)
22-5/8
(575)
25-3/8
(645)
28-1/8
(714)
30-7/8
(784)
36-3/8
(924)
41-7/8
(1064)
47-3/8
(1203)
D (Dia)*†
in.
(mm)
4
(102)
4
(102)
4
(102)
4
(102)
5
(127)
5
(127)
5
(127)
6
(152)
6
(152)
6
(152)
GAS INLET
NAT.
1/2
in.
LP
1/2
1/2
1/2
1/2
1/2
1/2
1/2
1/2
1/2
3/4
1/2 OR 3/4
3/4
1/2 OR 3/4
3/4
1/2 OR 3/4
3/4
1/2 OR 3/4
3/4
1/2 OR 3/4
†NOTE: “D” diameter equals the air inlet opening and the flue discharge opening.
QVSD Separated Combustion Duct Furnace — Bottom Service Access Only
DIMENSIONS XXX STANDARD UNITS
16
WEIGHT
lb.
(kg)
161
(73)
180
(82)
188
(85)
207
(93)
227
(103)
246
(116)
266
(121)
305
(138)
344
(156)
383
(174)
SEPARATED COMBUSTION DUCT FURNACE – PERFORMANCE DATA
INPUT
UNIT
SIZE
100
125
150
175
200
225
250
300
350
400
(MAX)
MBH
(kW)
100
(29.3)
125
(36.6)
150
(43.9)
175
(51.2)
200
(58.6)
225
(65.9)
250
(73.2)
300
(87.8)
350
(102.5)
400
(117.1)
OUTPUT
(MIN)
MBH
(kW)
50
(14.6)
62.5
(18.3)
75
(22.0)
87.5
(25.6)
100
(29.3)
112.5
(32.9)
125
(36.6)
150
(43.9)
175
(51.2)
200
(58.6)
MBH
(kW)
80
(23.4)
100
(29.3)
120
(35.1)
140
(41.0)
160
(46.9)
180
(52.7)
200
(58.6)
240
(70.3)
280
(82.0)
320
(93.7)
MIN.
CFM
(cu. m/s)
822
(0.388)
1028
(0.485)
1233
(0.582)
1439
(0.679)
1645
(0.776)
1850
(0.873)
2056
(0.097)
2467
(1.164)
2878
(1.358)
3289
(1.552)
Temp. Rise
Deg. F.
(Deg. C.)
90
(50)
90
(50)
90
(50)
90
(50)
90
(50)
90
(50)
90
(50)
90
(50)
90
(50)
90
(50)
P.D.
in. of W.C.
(kPa)
0.10
(0.20)
0.10
(0.20)
0.10
(0.20)
0.10
(0.20)
0.10
(0.20)
0.10
(0.20)
0.10
(0.20)
0.10
(0.20)
0.10
(0.20)
0.10
(0.20)
MAX.
CFM
(cu. m/s)
3700
(1.746)
4625
(2.183)
5550
(2.620)
6475
(3.056)
7401
(3.493)
8326
(3.930)
9251
(4.366)
11,101
(5.240)
12,951
(6.113)
14,801
(6.986)
Temp. Rise
Deg. F.
(Deg. C.)
20
(11)
20
(11)
20
(11)
20
(11)
20
(11)
20
(11)
20
(11)
20
(11)
20
(11)
20
(11)
P.D.
in. of W.C.
(Pascals)
2.03
(0.51)
1.92
(0.48)
1.81
(0.45)
1.86
(0.46)
1.90
(0.47)
1.93
(0.48)
1.96
(0.49)
2.00
(0.50)
2.02
(0.50)
2.05
(0.51)
NOTE: Ratings shown are for unit installations at elevations between 0 and 2000 ft. (610m). For unit installations in USA above 2000 ft. (610m), the unit input must be derated
4% for each 1000 ft. (305m) above sea level; refer to local codes, or in absence of local codes, refer to the National Fuel Gas Code, the latest edition of ANSI Standard Z223.1
(N.F.P.A. No. 54). For installations in Canada, any references to deration at altitudes in excess of 2000 ft. (610m) are to be ignored. At altitudes of 2000 to 4500 ft. (610 to 1372m),
the unit must be derated to 90% of the normal altitude rating, and be so marked in accordance with the ETL certification.
TEMPERATURE RISE AND PRESSURE DROP GRAPH
17
CABINET BLOWERS (CAB 1 THRU 4)
STERLING OFFERS THESE QUALITY FEATURES
AS STANDARD EQUIPMENT
Sterling Cabinet Blowers have been specially
designed for air handling systems of high static
pressure in combination with Sterling Duct
Furnaces.
The cabinet blowers have been matched against
the proper furnace size for greatest efficiency of
operation.
Removable side panels for inspection, servicing and
motor maintenance.
Motor and drive shall be furnished by the factory
and shipped fully mounted to the floor of the unit so
that field mounting is not required.
A connecting transition duct between blower and
duct furnace is furnished as standard equipment when a
specific furnace capacity is chosen (Digits 5, 6 & 7).
Four sizes provide cfm capacities ranging from 1250
to 8000 cfm (0.59 to 3.78m3/s).
CABINET BLOWER
MODEL NUMBER DESCRIPTION
Digit
C
X
Item
X
X — 1
2
Prefix
3
4
5
6
UT
7
CA
8
SV
9
10 11 +
MT MS
AS
(Internal Use Only)
Digit # 1, 2, 3, 4 - Unit Type [UT]
Digit #8 - Supply Voltage [SV]
Digit #11 - Accessories [AS]
CAB1 - Cabinet Blower Size 1
1 - 115/1/60
2 - 208/1/60
3 - 230/1/60
4 - 208/3/60
All Field Installed Accessories are to be entered as a separate line
item using new catalog number which utilizes “AS” as a prefix. i.e:
F1 becomes AS-F1.
Digit # 5, 6, 7 - Furnace Capacity [CA]*
Digit #9 - Motor Type [MT]
100 - 100,000 BTU/HR
125 - 125,000 BTU/HR
150 - 150,000 BTU/HR
175 - 175,000 BTU/HR
200 - 200,000 BTU/HR
225 - 225,000 BTU/HR
250 - 250,000 BTU/HR
300 - 300,000 BTU/HR
350 - 350,000 BTU/HR
400 - 400,000 BTU/HR
000 - No Transition Required
* Indicates transition duct size needed for corresponding
QVED or QVES Duct Furnace. Refer to
Compatable Duct Furnace Size indicated in the table on
page 19.
1 - Open Drip Proof
2 - Totally Enclosed
3 - Premium Efficiency, Open Drip Proof
4 - Premium Efficiency, Totally Enclosed
5 - 230/3/60
6 - 460/3/60
7 - 575/3/60
Z - Other
FACTORY INSTALLED
B1 - 1" Washable Filters
B2 - 2" Washable Filters
B3 - 2" Throwaway Filters
B6 - 1" Throwaway Filters
FIELD INSTALLED (AS-____ )
F1 - 1-Stage T675A Ductstat
G1 - 1-Stage T87K Mercury Free
Thermostat w/Subase
Thermostat w/TG511A Guard
G3 - 1-Stage T834N Mercury Free
Thermostat/Fan Switch
G5 - 2-Stage TH5220D Mercury Free
Thermostat w/Subbase
G6 - Locking Thermostat Cover
G8 - 1-Stage T6169C
Line Voltage Stat/Subbase
Thermostat
P4 - Terminal Block Wiring
Digit #10 - Blower Motor Sizes [MS]
B - 1/3 HP. w /Contactor
C - 1/2 HP. w/Contactor
D - 3/4 HP. w/Contactor
F - 1 HP. w/Contactor
G - 1-1/2 HP. w/Contactor
H - 2 HP. w/Contactor
P - 3 HP. w/Contactor
Y5 - Cabinet Insulation
Y6 - Transition Insulation
K - 1/3 HP.
L - 1/2 HP.
M - 3/4 HP.
N - 1 HP.
MOTOR DATA
CURRENT
1/3 H.P.
1/2 H.P.
3/4 H.P.
CHARACTERISTICS
R.P.M.
AMPS
R.P.M.
AMPS
115-1-60
1725
5.9
1725
7.2
R.P.M.
1 H.P.
AMPS
R.P.M.
11
1725
115/230-1-60
Approx. Ship Wt.
16#
21#
Approx. Ship Wt.
1725
25#
1725
1725
1725
28#
1725
MOTOR FRAME MUST NOT EXCEED NEMA SIZE 56.
18
1725
R.P.M.
AMPS
1725
13
44#
5.8
2.2
41#
3 H.P.
AMPS
26
8.2
4.3
1.6
31#
R.P.M.
41#
3.2
1.3
2 H.P.
AMPS
16.4
7.7
31#
2.6
1.4
R.P.M.
15.4
5.5
25#
28
208/230/460-3-60
1-1/2 H.P.
AMPS
1725
9.5
2.9
41#
1725
4.8
43#
CABINET BLOWER DIMENSION DATA
A
B
C
D
E
F
G
APPR. SHIP WT.
MODEL
in.
in.
in.
in.
in.
in.
in.
FILTER DATA
FILTER
LESS MOTOR
NO. *
(mm)
(mm)
(mm)
(mm)
(mm)
(mm)
(mm)
SIZE **
REQ’D.
LB (KG)
CAB-1/100
65-1/2
26
10
18
21-1/4
15-3/4
15-5/8
25 X 25 X 1
1
(1664)
(660)
(254)
(457)
(540)
(400)
(397)
CAB-1/125
CAB-2/150
CAB-2/175
CAB-3/200
CAB-3/225
CAB-3/250
CAB-4/300
CAB-4/350
CAB-4/400
65-1/2
26
10
18
21-1/4
15-3/4
18-3/8
(1664)
(660)
(254)
(457)
(540)
(400)
(467)
65-1/2
26
10
18
21-1/4
15-3/4
18-3/8
(1664)
(660)
(254)
(457)
(540)
(400)
(467)
65-1/2
26
10
18
21-1/4
15-3/4
21-1/8
(1664)
(660)
(254)
(457)
(540)
(400)
(537)
65-1/2
40-1/2
10
18
35-3/4
30-3/8
23-7/8
(1664)
(1029)
(254)
(457)
(908)
(772)
(606)
65-1/2
40-1/2
10
18
35-3/4
30-3/8
26-5/8
(1664)
(1029)
(254)
(457)
(908)
(772)
(676)
65-1/2
40-1/2
10
18
35-3/4
30-3/8
29-3/8
(1664)
(1029)
(254)
(457)
(908)
(772)
(746)
65-1/2
60-1/2
10
18
55-3/4
50-3/8
34-7/8
(1664)
(1537)
(254)
(457)
(1416)
(1280)
(886)
69-1/2
60-1/2
14
22
55-3/4
50-3/8
40-3/8
(1765)
(1537)
(356)
(559)
(1416)
(1280)
(1026)
69-1/2
60-1/2
14
22
55-3/4
50-3/8
45-7/8
(1765)
(1537)
(356)
(559)
(1416)
(1280)
(1165)
135
(61)
25 X 25 X 1
1
135
(61)
25 X 25 X 1
1
155
(70)
25 X 25 X 1
1
155
(70)
25 X 20 X 1
2
200
(91)
25 X 20 X 1
2
200
(91)
25 X 20 X 1
2
200
(91)
25 X 20 X 1
3
296
(134)
25 X 20 X 1
3
296
(134)
25 X 20 X 1
3
296
(134)
*Never use a single cabinet blower to handle more than one duct furnace. CAB-4 has two blowers driven by one motor.
**Standard filters are 1'' thick throw away type. Optional 2'' thick filters are available. Side panels removable for inspection, servicing and motor maintenance
cabinet painted gray enamel.
Sterling reserves the right to change specifications without incurring obligations.
Cabinet blower units are not certified by ETL.
19
CABINET BLOWER – PERFORMANCE DATA
Total
Static Pressure *
in. of W.C.
(kPa)
CFM
(cu. m/s)
1,250
(0.590)
1,250
CAB 1
(0.590)
10”
1,500
BLOWER (0.708)
1,750
(0.826)
2,000
(0.944)
1,500
(0.708)
1,750
(0.826)
CAB 2
2,000
12”
(0.944)
BLOWER 2,250
(1.062)
2,500
(1.180)
2,750
(1.298)
1,750
(0.826)
2,000
(0.944)
2,250
(1.062)
2,500
(1.180)
2,750
CAB 3
(1.298)
12”
3,000
BLOWER (1.416)
2,250
(1.062)
2,500
(1.180)
2,750
(1.298)
3,000
(1.416)
3,250
(1.534)
3,500
(1.652)
2,750
(1.298)
3,000
(1.416)
3,500
(1.652)
4,000
(1.888)
4,500
(2.124)
5,000
(2.360)
5,500
CAB 4
(2.596)
(2) 12”
6,000
BLOWERS (2.832)
6,500
(3.068)
7,000
(3.304)
7,500
(3.540)
8,000
(3.776)
MODEL
0.2
(0.05)
RPM
525
525
600
650
700
425
450
475
515
540
575
450
475
500
525
560
610
500
520
550
600
630
675
400
425
430
450
475
500
530
575
610
720
800
860
HP
(kW)
1/3
(0.25)
1/3
(0.25)
1/3
(0.25)
1/3
(0.25)
1/2
(0.37)
1/3
(0.25)
1/3
(0.25)
1/3
(0.25)
1/2
(0.37)
1/2
(0.37)
1/2
(0.37)
1/3
(0.25)
1/3
(0.25)
1/2
(0.37)
1/2
(0.37)
1/2
(0.37)
1/2
(0.37)
1/2
(0.37)
1/2
(0.37)
1/2
(0.37)
3/4
(0.56)
3/4
(0.56)
3/4
(0.56)
3/4
(0.56)
3/4
(0.56)
3/4
(0.56)
3/4
(0.56)
3/4
(0.56)
3/4
(0.56)
1
(0.75)
1-1/2
(1.12)
1-1/2
(1.12)
1-1/2
(1.12)
2
(1.49)
2
(1.49)
0.3
(0.07)
RPM
650
650
680
710
760
500
515
530
560
590
615
510
525
550
580
605
640
550
580
605
640
675
700
450
475
480
500
525
540
575
615
660
790
860
930
HP
(kW)
1/3
(0.25)
1/3
(0.25)
1/3
(0.25)
1/3
(0.25)
1/2
(0.37)
1/3
(0.25)
1/3
(0.25)
1/3
(0.25)
1/2
(0.37)
1/2
(0.37)
1/2
(0.37)
1/3
(0.25)
1/3
(0.25)
1/2
(0.37)
1/2
(0.37)
1/2
(0.37)
3/4
(0.56)
1/2
(0.37)
1/2
(0.37)
1/2
(0.37)
3/4
(0.56)
3/4
(0.56)
1
(0.75)
3/4
(0.56)
3/4
(0.56)
3/4
(0.56)
3/4
(0.56)
3/4
(0.56)
3/4
(0.56)
1
(0.75)
1-1/2
(1.12)
2
(1.49)
2
(1.49)
2
(1.49)
3
(2.24)
0.4
(0.10)
RPM
680
680
715
750
800
550
560
590
610
625
650
560
590
600
615
640
660
590
610
640
670
700
725
510
550
560
565
575
600
615
660
710
830
900
960
HP
(kW)
1/3
(0.25)
1/3
(0.25)
1/3
(0.25)
1/2
(0.37)
1/2
(0.37)
1/3
(0.25)
1/3
(0.25)
1/2
(0.37)
1/2
(0.37)
1/2
(0.37)
3/4
(0.56)
1/3
(0.25)
1/2
(0.37)
1/2
(0.37)
1/2
(0.37)
3/4
(0.56)
3/4
(0.56)
1/2
(0.37)
1/2
(0.37)
3/4
(0.56)
3/4
(0.56)
1
(0.75)
1
(0.75)
3/4
(0.56)
3/4
(0.56)
3/4
(0.56)
3/4
(0.56)
3/4
(0.56)
1
(0.75)
1
(0.75)
1-1/2
(1.12)
2
(1.49)
2
(1.49)
3
(2.24)
3
(2.24)
0.5
(0.12)
RPM
760
760
790
805
850
630
635
640
650
670
690
630
635
645
665
685
710
645
665
680
705
735
775
..
600
610
615
620
630
650
690
750
860
930
NA
0.6
(0.15)
HP
(kW)
1/3
(0.25)
1/3
(0.25)
1/3
(0.25)
1/2
(0.37)
1/2
(0.37)
1/3
(0.25)
1/2
(0.37)
1/2
(0.37)
1/2
(0.37)
1/2
(0.37)
3/4
(0.56)
1/3
(0.25)
1/2
(0.37)
1/2
(0.37)
1/2
(0.37)
3/4
(0.56)
3/4
(0.56)
1/2
(0.37)
1/2
(0.37)
3/4
(0.56)
3/4
(0.56)
1
(0.75)
1
(0.75)
..
RPM
3/4
(0.56)
3/4
(0.56)
3/4
(0.56)
1
(0.75)
1
(0.75)
1-1/2
(1.12)
1-1/2
(1.12)
2
(1.49)
2
(1.49)
3
(2.24)
650
780
780
810
850
890
..
680
690
700
710
730
675
680
685
700
715
750
675
700
710
730
750
800
..
660
670
680
690
700
715
800
910
960
NA
0.7
(0.17)
HP
(kW)
1/3
(0.25)
1/3
(0.25)
1/2
(0.37)
1/2
(0.37)
1/2
(0.37)
..
RPM
1/2
(0.37)
1/2
(0.37)
3/4
(0.56)
3/4
(0.56)
3/4
(0.56)
1/2
(0.37)
1/2
(0.37)
1/2
(0.37)
3/4
(0.56)
3/4
(0.56)
1
(0.75)
1/2
(0.37)
3/4
(0.56)
3/4
(0.56)
3/4
(0.56)
1
(0.75)
1
(0.75)
..
725
3/4
(0.56)
3/4
(0.56)
1
(0.75)
1
(0.75)
1
(0.75)
1-1/2
(1.12)
1-1/2
(1.12)
2
(1.49)
3
(2.24)
3
(2.24)
0.8
(0.20)
HP
(kW)
1/3
(0.25)
1/3
(0.25)
1/2
(0.37)
1/2
(0.37)
3/4
(0.56)
..
RPM
..
1/2
(0.37)
1/2
(0.37)
3/4
(0.56)
3/4
(0.56)
3/4
(0.56)
1/2
(0.37)
1/2
(0.37)
3/4
(0.56)
3/4
(0.56)
3/4
(0.56)
1
(0.75)
1/2
(0.37)
3/4
(0.56)
3/4
(0.56)
1
(0.75)
1
(0.75)
1-1/2
(1.12)
..
..
700
840
840
860
890
925
..
740
750
760
780
720
735
740
750
775
790
735
745
770
785
790
840
710
715
720
700
760
840
940
0.9
(0.22)
DUCT FURNACE SECTIONS
PRESSURE DROP
RPM
..
HP
(kW)
..
..
HP
(kW)
..
..
..
..
..
895
970
..
1/2
(0.37)
3/4
(0.56)
3/4
(0.56)
..
..
1/2
(0.37)
3/4
(0.56)
3/4
(0.56)
..
..
..
..
..
785
1/2
(0.37)
3/4
(0.56)
3/4
(0.56)
3/4
(0.56)
..
810
3/4
(0.56)
3/4
(0.56)
3/4
(0.56)
1
(0.75)
..
940
980
790
795
800
..
785
..
1/2
(0.37)
3/4
(0.56)
3/4
(0.56)
3/4
(0.56)
1
(0.75)
3/4
(0.56)
3/4
(0.56)
3/4
(0.56)
1
(0.75)
1
(0.75)
1-1/2
(1.12)
..
..
..
1
(0.75)
1
(0.75)
1
(0.75)
1-1/2
(1.12)
1-1/2
(1.12)
2
(1.49)
2
(1.49)
3
(2.24)
730
785
790
805
815
780
800
810
820
830
875
740
750
760
730
800
890
960
990
1,010
815
820
830
..
810
..
3/4
(0.56)
3/4
(0.56)
3/4
(0.56)
1
(0.75)
1
(0.75)
3/4
(0.56)
3/4
(0.56)
3/4
(0.56)
1
(0.75)
1
(0.75)
1-1/2
(1.12)
..
..
..
..
1
(0.75)
1
(0.75)
1
(0.75)
1-1/2
(1.12)
1-1/2
(1.12)
2
(1.49)
3
(2.24)
3
(2.24)
..
..
790
1
(0.75)
1-1/2
(1.12)
1-1/2
(1.12)
1-1/2
(1.12)
2
(1.49)
3
(2.24)
810
815
825
845
805
810
820
840
860
890
800
810
820
830
930
NA
NA
NA
NA
NA
NA
NA
SIZE in. W.C. SIZE in. W.C.
(kPa)
(kPa)
100
0.16
..
..
(0.04)
125
0.10
..
..
(0.02)
125
0.15
..
..
(0.04)
125
0.18
..
..
(0.04)
125
0.24
..
..
(0.06)
150
0.09
175
0.07
(0.02)
(0.02)
150
0.15
175
0.11
(0.04)
(0.03)
150
0.20
175
0.14
(0.05)
(0.03)
175
0.18
..
..
(0.04)
175
0.22
..
..
(0.05)
175
0.27
..
..
(0.07)
200
0.09
..
..
(0.02)
200
0.11
225
0.09
(0.03)
(0.02)
200
0.14
225
0.11
(0.03)
(0.03)
200
0.17
225
0.13
(0.04)
(0.03)
200
0.20
225
0.14
(0.05)
(0.03)
200
0.22
225
0.175
(0.05)
(0.04)
250
0.09
..
..
(0.02)
250
0.11
..
..
(0.03)
250
0.12
..
..
(0.03)
250
0.14
..
..
(0.03)
250
0.16
..
..
(0.04)
250
0.20
..
..
(0.05)
300
0.09
..
..
(0.02)
300
0.10
..
..
(0.02)
300
0.14
350
0.1
(0.03)
(0.02)
300
0.18
350
0.13
(0.04)
(0.03)
350
0.16
400
0.14
(0.04)
(0.03)
350
0.20
400
0.17
(0.05)
(0.04)
350
0.23
400
0.2
(0.06)
(0.05)
350
0.26
400
0.23
(0.06)
(0.06)
350
0.30
400
0.26
(0.07)
(0.06)
400
0.28
..
..
(0.07)
400
0.30
..
..
(0.07)
400
0.31
..
..
(0.08)
*External static pressure in inches of W.C. Add the pressure drop of the duct furnace and the pressure drop of the ductwork to determine the
total external static pressure.
20
GENERAL INFORMATION
SOUND RATINGS
The individual unit’s Performance Data
includes sound ratings. The ratings
provide a guide in determining the
acceptable degree of loudness in
particular occupancy situations.
Certain general rules apply to specific
selection of unit heaters with regard
to degree of quietness (or loudness):
• The greater the fan diameter, the
higher the sound level.
• The higher the motor RPM, the
higher the sound level. Note that
on most units the lower the speed
mode results in lowering the
sound rating one increment.
• Selecting a larger number of
smaller units generally results in
lower overall noise levels than
fewer large units
All Sterling unit heater motors are
isolated from the mechanical mount by
resilient isolators. This mounting along
with four balanced fan blades and
excellent overall construction
integrity, assures you the utmost in
quiet operation.
The following table outlines sound
rating for various application. The
lower the number, the quieter the unit
and lower the sound requirement.
CATEGORY OF AREA
SOUND
RATING
Apartments, assembly hall,
I
classrooms, churches,
courtrooms, executives offices,
hospitals, libraries, museums,
theatres.
Dining rooms, general office,
II
Recreations areas, small retail
stores.
Restaurants, banks, cafeterias,
III
department stores, public
buildings, service stations.
Gymnasiums, health clubs
IV
laundromats, supermarkets.
Garages, small machine shops,
V
light manufacturing.
Factories, foundries, steel mills III-VII**
Altitude Above Sea Level Ft.
(m)
Gas Heating Input (Actual)
Blower RPM (Req'd)
Blower BHP (Req'd)
0
1.00
1.00
1.00
CORRECTION FACTORS FOR HIGH ALTITUDE INSTALLATIONS*
2000'
3000'
4000'
5000'
6000'
7000'
(610m)
(915m)
(1220m)
(1525m)
(1830m)
(2135m)
0.92
0.88
0.84
0.80
0.76
0.72
1.04
1.08
1.09
1.12
1.15
1.19
1.07
1.12
1.18
1.25
1.33
1.41
*Multiply standard unit by correction factor to get actual input and required RPM and HP.
In Canada derate 10% for altitudes 2000 to 4500 feet (610 to 1372m).
GAS HEATING VALUE
The standard gross heating value for
natural gas is 1075 BTU/HR per cubic
foot (40.1 MJ/m3). Propane gas has a
gross heating value of 2500 BTU/HR
per cubic foot (93.1 MJ/m3). When
selecting equipment, you should take
into account, variations from standard
values (heat content varies by type
and location).
To account for variations in gross
heating values (of fuel) you should
adjust the total heat input required
and select the equipment based on
the adjusted load with the following
formula.
ADJUSTED LOAD =
Calculated Load x Standard Gross Ht.
Value [(BTU/HR)/Cu. Ft.]
Actual Gross Ht. Value [(BTU/HR) Cu.Ft.]
DUCT FURNACES
The duct furnace design is certified
by ETL for use with natural and LP
(propane) gases. ANSI and NFPA
Standards referred to in this manual
are the ones that were applicable at
the time the design was certified. In
addition, the duct furnaces may be
installed on the downstream side of a
cooling unit, without need of a bypass
duct. (Stainless steel heat exchangers
are recommended.)
UNIT HEATERS AND DUCT FURNACES
(U.S.A. Installations)
The installation must conform with
local building codes or, in absence of
local codes, with the National Fuel Gas
Code, the latest edition of ANSI Z223.1
(NFPA No. 54).
Installation in aircraft hangars must be
in accordance with current ANSI/
NFPA no. 409, Standard for aircraft
Hangars. Those in repair garages
should be in accordance with current
ANSI/NFPA no. 88A, Standard for
Parking Structure or with current
ANSI/NFPA no. 88B, Standard for
Parking Structure or with ANSI/NFPA
no. 88B, Standard for Repair Garages.
*If the unit is to be installed at an
altitude exceeding 2,000 feet (610m)
above sea level, derate the input by 4%
for each 1,000 foot (305m) rise above
sea level. Special orifices are required
for installation above 2,000 feet (610m),
(unless the gas lines are already
derated; verify this information with
your utility company and inform
customer service on the order.
(Canadian Installations)
Units installed in Canada must
conform with local building codes, or
in absence of local building codes,
with CSA-B149.1 “Installation Codes
for Natural Gas Burning Appliances
and Equipment” or CSA-B149.2
“Installation Codes for Propane Gas
Burning Appliances and Equipment.”
These units have been designed and
certified to comply with CSA 2.6.
For installations in Canada, any
references to deration at altitudes in
excess of 2,000 feet (610m) are to be
ignored. At altitudes of 2,000 to 4,500
feet (610 to 1372m), the unit must be
derated to 90% of the normal altitude
rating, and be so marked in
accordance with ETL certification.
**Depending on specific use in these facilities,
size of operation, etc.
21
APPLICATIONS
UNIT HEATER PLACEMENT
Gas-fired unit heaters are used
primarily in commercial and industrial
buildings such as warehouses,
manufacturing areas, garages,
showrooms, lobbies, etc.
Placement is typically determined by
air distribution requirements. Proper
distributions should have air directed
toward areas of greatest heat loss.
Multiple units may be used to
greatest effect by positioning units
around the perimeter. Several units
near the center and with air
discharging toward outside walls may
also satisfy the heating requirements.
Direct air discharge on occupants
should be avoided.
TYPICAL APPLICATIONS
A large square area with exposed walls and
roof; units are blanketing all exposed surfaces.
A narrow area with four exposed walls either
with or without roof exposure.
HOW TO CALCULATE HEAT LOSS
It is suggested that when calculating
heat loss for a building, reference
be made to procedures outlined in
the ASHRAE Handbook. As an easy
reference, however, the following
abbreviated method may be used
with a good degree of reliability.
1. Determine inside temperature to
be maintained and the design
outside temperature for your
locality. The difference between
these two figures is the design
temperature difference.
2. Calculate net areas in square feet
of glass, wall, floor, and roof
exposed to outside temperature
or unheated spaces. Calculate
door as all glass.
3. Select heat-transfer coefficients
from the table below (or the
ASHRAE Handbook) and compute
the heat-transmission loss for
each area in BTU/HR by
multiplying each area by the
heat-transfer coefficient and the
temperature difference.
4. Add 10% to the heat-loss figures
for areas exposed to prevailing
winds.
5. Calculate the volume of the room
or area in cubic feet and multiply
by the estimated number of air
changes per hour due to
infiltration (usually from one to
two). Determine the number of
cubic feet per hour of air
exhausted by ventilating fans or
industrial processes. Substitute the
larger of these two figures in the
formula to determine the heat
required to raise the air from
outside to room temperature —
BTU/HR = cubic feet per hour
x temperature difference
55
6. The totals of BTU/HR losses from
3, 4 and 5 (above) will give the
total BTU/HR to be supplied by
unit heaters. (Note: If processes
performed in the room liberate
considerable amounts of heat, this
may be determined as accurately
as possible and subtracted from
the total).
A small area with exposed walls requiring one
unit.
22
Building Material
WALLS
Poured concrete 80#/cu. ft.
8-inch ...........................................
12-inch ...........................................
Concrete Block, hollow cinder
aggregate
8-inch ...........................................
12-inch ...........................................
Gravel aggregate
8-inch ...........................................
12-inch ...........................................
Concrete Block, w/4-inch facebrick
Gravel, 8-inch ...............................
Cinder, 8-inch ................................
Metal
(un-insulated) ...............................
w/1-inch blanket insulation ........
ROOFING
Corrugated Metal (un-insulated) ....
w/1-inch bolt or blanket ..............
w/11/2 -inch bolt or blanket .........
w/3-inch bolt or blanket ..............
Flat Metal
w/ 3/8 -inch built-up roofing .........
w/1-inch blanket insulation
under deck ....................................
w/2-inch blanket insulation
under deck ....................................
Wood/ 1" /
(un-insulated) w/ 3/8 -inch built-up
roofing ............................................
Wood/ 2" /
roofing ............................................
Concrete slab/ 2" /
roofing ............................................
w/1-inch insulation board ...........
Concrete slab/ 3" /
roofing ............................................
Gypsum slab/ 2" /
(un-insulated) w/ 1/2 -inch gypsum
board ..............................................
Gypsum slab/ 3" /
(Un-insulated) w/ 1/2 -inch gypsum
board ..............................................
WINDOWS
Vertical, single-glass ........................
Vertical, double-glass, 3/16 - inch air
space ..................................................
Horizontal, single-glass (sky light)
DOORS
Metal — single sheet .......................
Wood, 1-inch ......................................
2-inch .....................................
"U"
Factor
0.25
0.18
0.39
0.36
0.52
0.47
0.41
0.33
1.17
0.22
0.08
1.50
0.23
0.16
0.08
0.90
0.21
0.12
0.48
0.17
0.32
0.15
0.30
0.16
0.23
0.14
0.36
0.20
0.30
0.18
1.13
0.69
1.40
1.20
0.64
0.43
HEAT THROW DATA
STANDARD UNIT HEATER APPLICATIONS
Approximate Distance of Heat Throw (Feet)
Distance From
Floor to Bottom
of Unit “H”
ft.
(m)
8
(2.4)
10
(3.0)
12
(3.7)
15
(4.6)
20
(6.1)
100,000
(29.3)
125,000
(36.6)
150,000
(43.9)
60
(18.3)
54
(16.5)
44
(13.4)
NR
65
(19.8)
56
(17.1)
46
(14.0)
NR
NR
NR
70
(21.3)
60
(18.3)
49
(14.9)
45
(13.7)
NR
175,000
(51.2)
UNIT SIZE BTU/Hr (kW)
200,000
225,000
(58.6)
(65.9)
250,000
(73.2)
Approximate Distance of Heat Throw - Feet (Meters)
75
80
85
90
(22.9)
(24.4)
(25.9)
(27.4)
64
68
72
78
(19.5)
(20.7)
(21.9)
(23.8)
57
61
65
68
(17.4)
(18.6)
(19.8)
(20.7)
49
52
56
60
(14.9)
(15.8)
(17.1)
(18.3)
NR
46
50
54
(14.0)
(15.2)
(16.5)
300,000
(87.8)
350,000
(102.5)
400,000
(117.1)
105
(32.0)
90
(27.4)
80
(24.4)
70
(21.3)
63
(19.2)
110
(33.5)
95
(29.0)
84
(25.6)
74
(22.6)
66
(20.1)
120
(36.6)
100
(30.5)
90
(27.4)
80
(24.4)
70
(21.3)
300,000
(87.8)
350,000
(102.5)
400,000
(117.1)
115
(35.1)
99
(30.2)
88
(26.8)
74
(22.6)
66
(20.1)
120
(36.6)
105
(32.0)
94
(28.7)
79
(24.1)
71
(21.6)
125
(38.1)
110
(33.5)
100
(30.5)
84
(25.6)
75
(22.9)
300,000
(87.8)
350,000
(102.5)
400,000
(117.1)
125
(38.1)
109
(33.2)
100
(30.5)
85
(25.9)
77
(23.5)
130
(39.6)
115
(35.1)
103
(31.4)
88
(26.8)
81
(24.7)
138
(42.1)
120
(36.6)
108
(32.9)
94
(28.7)
85
(25.9)
30° NOZZLE
Distance From
Floor to Bottom
of Unit “H”
ft.
(m)
8
(2.4)
10
(3.0)
12
(3.7)
15
(4.6)
20
(6.1)
100,000
(29.3)
125,000
(36.6)
150,000
(43.9)
65
(19.8)
57
(17.4)
50
(15.2)
NR
70
(21.3)
60
(18.3)
54
(16.5)
45
(13.7)
NR
75
(22.9)
64
(19.5)
57
(17.4)
48
(14.6)
NR
NR
175,000
(51.2)
200,000
225,000
(58.6)
(65.9)
250,000
(73.2)
80
85
90
95
(24.4)
(25.9)
(27.4)
(29.0)
68
72
78
86
(20.7)
(21.9)
(23.8)
(26.2)
60
64
70
77
(18.3)
(19.5)
(21.3)
(23.5)
50
53
59
64
(15.2)
(16.2)
(18.0)
(19.5)
44
47
53
58
(13.4)
(14.3)
(16.2)
(17.7)
60° NOZZLE
Distance From
Floor to Bottom
of Unit “H”
ft.
(m)
8
(2.4)
10
(3.0)
12
(3.7)
15
(4.6)
20
(6.1)
100,000
(29.3)
125,000
(36.6)
150,000
(43.9)
75
(22.9)
65
(19.8)
60
(18.3)
50
(15.2)
NR
80
(24.4)
70
(21.3)
64
(19.5)
54
(16.5)
49
(14.9)
85
(25.9)
75
(22.9)
68
(20.7)
56
(17.1)
52
(15.8)
175,000
(51.2)
200,000
225,000
(58.6)
(65.9)
250,000
(73.2)
90
95
100
110
(27.4)
(29.0)
(30.5)
(33.5)
79
83
88
95
(24.1)
(25.3)
(26.8)
(29.0)
72
76
80
84
(21.9)
(23.2)
(24.4)
(25.6)
61
65
68
71
(18.6)
(19.8)
(20.7)
(21.6)
55
59
61
65
(16.8)
(18.0)
(18.6)
(19.8)
23
HEAT THROW DATA
90° NOZZLE
UNIT
SIZE
100
10 ft.
(3.0 m)
NR
125
NR
150
NR
175
NR
200
NR
225
NR
250
NR
300
NR
350
NR
400
NR
30
(9.1)
35
(10.7)
40
(12.2)
45
(13.7)
50
(15.2)
55
(16.8)
60
(18.3)
70
(21.3)
80
(24.4)
100
(30.5)
DISTANCE FROM FLOOR TO BOTTOM OF UNIT “H”
15 ft.
20 ft.
25 ft.
(4.6 m)
(6.1 m)
(7.6 m)
x
25
NR
NR
(7.6)
x
30
NR
NR
(9.1)
x
35
NR
NR
(10.7)
x
40
NR
NR
(12.2)
x
40
40
x
35
NR
(12.2)
(12.2)
(10.7)
x
40
48
x
35
NR
(12.2)
(14.6)
(10.7)
x
45
56
x
40
50
x
35
(13.7)
(17.1)
(12.2)
(15.2)
(10.7)
x
45
65
x
40
60
x
35
(13.7)
(19.8)
(12.2)
(18.3)
(10.7)
x
50
70
x
45
65
x
40
(15.2)
(21.3)
(13.7)
(19.8)
(12.2)
x
50
80
x
45
75
x
40
(15.2)
(24.4)
(13.7)
(22.9)
(12.2)
30 ft.
(9.1 m)
NR
NOTES:
1. All throw data figures are approximations.
Allowances should be made for optimum
performance, altitude, etc.
2. N.R. - Units not recommended at
these mounting heights.
3. Nozzles are not supplied for unit
heaters below size 100.
4. Nozzles are available for QVEF/QVEB units.
5. 30°, 60° and 90° nozzles are shipped
unassembled.
NR
NR
NR
NR
NR
NR
55
(16.8)
60
(18.3)
65
(19.8)
x
x
x
35
(10.7)
35
(10.7)
40
(12.2)
"Y" SPLITTER
Distance From
Floor to Bottom
of Unit “H”
ft.
(m)
8
(2.4)
10
(3.0)
12
(3.7)
100,000
(29.3)
125,000
(36.6)
150,000
(43.9)
47
(14.3)
41
(12.5)
37
(11.3)
51
(15.5)
44
(13.4)
40
(12.2)
60
(18.3)
52
(15.8)
47
(14.3)
175,000
(51.2)
200,000
225,000
(58.6)
(65.9)
250,000
(73.2)
65
70
72
80
(19.8)
(21.3)
(21.9)
(24.4)
56
61
63
69
(17.1)
(18.6)
(19.2)
(21.0)
51
55
57
63
(15.5)
(16.8)
(17.4)
(19.2)
24
300,000
(87.8)
350,000
(102.5)
400,000
(117.1)
95
(29.0)
82
(25.0)
75
(22.9)
100
(30.5)
87
(26.5)
79
(24.1)
103
(31.4)
92
(28.0)
82
(25.0)
NOZZLE DIMENSIONS
A
c
B
30° NOZZLE*
60° NOZZLE*
90° NOZZLE*
Y-SPLITTER*
23-1/2
B
*30°, 60° and 90° Nozzles are field assembled; Y-splitter is factory assembled.
NOZZLE DIMENSIONAL DATA CHART
SYMBOL
NOZZLE TYPE
30 DEG.
WIDTH
A
in.
(mm)
60 DEG.
90 DEG.
Y-Splitter
30 DEG.
HEIGHT
B
in.
(mm)
60 DEG.
90 DEG.
Y-Splitter
30 DEG.
FURTHEST
DEPTH
C
in.
(mm)
60 DEG.
90 DEG.
Y-Splitter
100
17-1/2
(444)
17-1/2
(444)
17-1/2
(444)
15-3/8
(391)
19-1/2
(495)
19-1/2
(495)
19-1/2
(495)
21-1/8
(537)
11-1/2
(292)
19-3/8
(492)
22-3/8
(568)
11
(279)
125
20-1/4
(514)
20-1/4
(514)
20-1/4
(514)
18-1/8
(460)
19-1/2
(495)
19-1/2
(495)
19-1/2
(495)
21-1/8
(537)
11-1/2
(292)
19-3/8
(492)
22-3/8
(568)
11
(279)
150
20-1/4
(514)
20-1/4
(514)
20-1/4
(514)
18-1/8
(460)
19-1/2
(495)
19-1/2
(495)
19-1/2
(495)
21-1/8
(537)
11-1/2
(292)
19-3/8
(492)
22-3/8
(568)
11
(279)
175
23
(584)
23
(584)
23
(584)
20-7/8
(530)
19-1/2
(495)
19-1/2
(495)
19-1/2
(495)
21-1/8
(537)
11-1/2
(292)
19-3/8
(492)
22-3/8
(568)
11
(279)
25
200
25-3/4
(654)
25-3/4
(654)
25-3/4
(654)
23-5/8
(600)
19-1/2
(495)
19-1/2
(495)
19-1/2
(495)
21-1/8
(537)
11-1/2
(292)
19-3/8
(492)
22-3/8
(568)
11
(279)
225
28-1/2
(724)
28-1/2
(724)
28-1/2
(724)
26-3/8
(670)
19-1/2
(495)
19-1/2
(495)
19-1/2
(495)
21-1/8
(537)
11-1/2
(292)
19-3/8
(492)
22-3/8
(568)
13-1/8
(333)
250
31-1/4
(794)
31-1/4
(794)
31-1/4
(794)
29-1/8
(740)
19-1/2
(495)
19-1/2
(495)
19-1/2
(495)
21-1/8
(537)
11-1/2
(292)
19-3/8
(492)
22-3/8
(568)
13-1/8
(333)
300
36-3/4
(933)
36-3/4
(933)
36-3/4
(933)
34-5/8
(879)
19-1/2
(495)
19-1/2
(495)
19-1/2
(495)
21-1/8
(537)
11-1/2
(292)
19-3/8
(492)
22-3/8
(568)
15-1/8
(384)
350
42-1/4
(1073)
42-1/4
(1073)
42-1/4
(1073)
40-1/8
(1019)
19-1/2
(495)
19-1/2
(495)
19-1/2
(495)
21-1/8
(537)
11-1/2
(292)
19-3/8
(492)
22-3/8
(568)
20-5/8
(524)
400
47-3/4
(1213)
47-3/4
(1213)
47-3/4
(1213)
45-5/8
(1159)
19-1/2
(495)
19-1/2
(495)
19-1/2
(495)
21-1/8
(537)
11-1/2
(292)
19-3/8
(492)
22-3/8
(568)
20-5/8
(524)
TYPICAL STANDARD SPECIFICATIONS
ENERPAK POWER VENTED HIGH EFFICIENCY
UNIT HEATERS - MODELS QVEF & QVEB
Furnish and install, where indicated or scheduled on
plans, high efficiency gas-fired unit heaters as made by
Sterling HVAC Equipment. All heaters are to have 80%
thermal efficiency. Each unit shall have a factory installed
power venter, sealed flue collector and be equipped with
energy saving electric ignition having electronic flame
supervision. All units shall display the ETL seal of
design compliance and be factory tested to assure
field operation.
MODELS QVED, QVES
DUCT FURNACE
Furnish and install where shown on plans, Gas-Fired Duct
Furnaces as made by Sterling HVAC Equipment. Duct
furnaces must have ETL certification for use downstream
(cold air side) of a cooling coil and must be constructed
of ETL defined corrosion resistant material with a builtin flue collector. Burners shall be pressed aluminized
steel or 409 stainless steel, and shall have stainless steel
port protectors. Heat exchangers shall be aluminized
steel, 409 stainless steel or 321 stainless steel. Tubes
shall not be lighter than 20 gauge. Headers shall not be
lighter than 18 gauge. Furnaces to be of neat appearance
and good workmanship. All units and components are to
be warranted (subject to appropriate disclaimers) from
defects in material and workmanship for a period of one
year from date of shipment from the factory.
Heat exchanger must consist of tube sections not lighter
than 20 gauge and connecting header plates not lighter
than 18 gauge. Material shall be aluminized steel, type 409
stainless steel or type 321 stainless steel. Burners are to
be of pressed steel, "aluminized", type 409 stainless steel
and shall be equipped with a stainless steel burner shade.
All cabinetry and trim pieces shall be fabricated from 20
gauge cold-rolled steel, finished on all four sides with
gray enamel paint or prepainted stock.
All sizes have exceptionally low pressure drop, making it
possible to handle large volumes of air without using an
axillary by-pass. Sterling duct furnaces are tested to
operate against 2.0 inches water column pressure.
All line voltage shall be completely enclosed in flexible
conduit. The heaters shall be equipped with a 115/24 volt
transformer. A fan time delay switch shall be provided and
will be controlled by a low voltage thermostat. Factory
installed relay and wiring shall permit the use of the
propeller fan for continuous air circulation when combined
with manufacturer's optional 24 volt summer/winter single
stage thermostat. Units shall also be equipped with low
voltage automatic reset high temperature controls wired to
shut off main gas valve and cause heater fan to operate
until limit resets. Gas valves shall be arranged for 100%
safety shut-off of both main burner gas supply. The safety
controls will include a combustion air pressure switch to
verify proper venting flow prior to allowing the gas valve
to operate.
(100% safety shutoff on LP models), 115 volt power venter,
vent system pressure switch, high limit switch, fan time
delay and 24 volt control transformer.
MODEL QVED
Sterling Model QVED Indoor Duct Furnaces are completely
factory assembled, piped, wired and test fired. All models
are ETL certified and approved by these agencies for
installation downstream (cold air side) of direct expansion
air conditioning coils (stainless steel heat exchanger
recommended). All models conform to the latest ANSI
Standards for safe and efficient performance. Units are
provided with a four-point suspension system and are
available for operation on either natural or LP gas.
All units and component assemblies shall be warranted
for a period of one year from date of shipment from
factory or 18 months from date of manufacture, whichever
occurs first. Heat exchanger, flue collector and burners
shall carry a ten year non-prorated limited warranty on
materials and workmanship (subject to appropriate
disclaimers).
Casings are die-formed 20 gauge bonderized steel,
finished in baked enamel. Heat exchangers are available
in aluminized steel, type 409 stainless steel and type 321
stainless steel. Burners are individually removable, die
formed and feature stainless steel port protectors.
Burners are accessible through a removable, bottom
panel.
MODEL QVEF - ENERPAK PROPELLER FAN
Heaters shall be equipped for use with (natural)
(propane) gas. Units shall be equipped with 115 volt,
single phase, 60 Hertz current, including internal automatic
reset thermal overload protection. Fans shall be hubbed
with aluminum blades and have complete fan guard
protection. Units with inputs greater than 250,000 Btu/hr.
(73.2 kW) shall be equipped with two motors and two fans
for optimum air distribution. Adjustable horizontal louvers
shall be provided for directing air flow.
All models are equipped with a 24 volt control system,
which is powered by a factory installed 115/24 volt
transformer, Electronic Spark Ignition and Integral Power
Venting with a sealed flue collector.
MODEL QVEB - ENERPAK BLOWER
Heaters shall be equipped for use with (natural) (propane)
gas. The unit shall have centrifugal blowers with 115 volt,
single phase, 60 Hertz current, open drip proof or totally
enclosed motors with built-in overload protection and be
equipped with an OSHA – type belt guard. Adjustable
horizontal louvers shall be provided for directing air flow.
26
TYPICAL STANDARD SPECIFICATIONS (continued)
ENERPAK MODEL QVES
Sterling Indoor Duct Furnace Model QVES incorporates
all of the features of the Model QVED but provides burner
access through the use of a burner drawer which slides
out from the specified side access.
MODELS QVSF, QVSB
SEPARATED COMBUSTION UNIT HEATERS
MODEL QVSD
SEPARATED COMBUSTION DUCT FURNACE
Sterling Model QVSF (Propeller) and QVSB (Blower)
Separated Combustion Unit Heaters, along with Model
QVSD (Duct Furnace) are completely factory assembled,
piped, wired and test fired. All models are ETL certified as
having 80% thermal efficiency and for operation on either
natural or LP (propane) gas. All models conform to the latest
ANSI Standards for safe operation.
All Standard units currently manufactured by Sterling are
RIGHT HAND units or have RIGHT HAND CONTROL
ACCESS. The proper designation is determined as follows:
WHEN YOU ARE STANDING BEHIND A UNIT AND YOU
EXTEND YOUR ARM OUT IN FRONT OF YOU, YOUR ARM
WILL BE POINTING IN THE DIRECTION OF AIR FLOW.
From this vantage point, YOUR RIGHT HAND SIDE IS THE
UNIT'S RIGHT HAND SIDE. THE NON-STANDARD UNIT IS
THEN DESIGNATED AS A LEFT HAND UNIT OR HAVING
LEFT HAND CONTROLS.
Casings are die-formed 20 gauge bonderized steel
finished in baked enamel. Heat exchangers are 20 gauge
tubes with 18 gauge headers. Heat exchangers are
available in aluminized steel, type 409 stainless steel and
type 321 stainless steel. Burners are individually
removable, die-formed and feature stainless steel port
protectors. Burners are available in aluminized or type
409 stainless steel.
CABINET BLOWERS
Cabinet blowers shall be as made by Sterling HVAC
Equipment consisting of a 20 gauge aluminized steel
cabinet, with removable side panels, centrifugal fan,
motor and filters. Motor and drive shall be furnished by
the factory and shipped fully mounted so that field
mounting is not required. Motor pulley shall be adjustable
as to pitch diameter. When a cabinet blower-duct furnace
combination is required, the manufacturer shall furnish the
standard cataloged duct transition piece. Furnaces shall
be of neat appearance and good workmanship. All units
and components are to be warranted (subject to
appropriate disclaimers) from defects in materials and
workmanship for a period of one year from the date of
shipment from the factory.
(100% safety shutoff on LP models), 115 volt power venter,
vent system pressure switch, high limit switch, fan time
delay and 24 volt control transformer.
Propeller models feature 2-point mounting while blowers
are equipped with a 4-point system.
All models are factory assembled with a horizontal flue
discharge position. A vertical flue position may be altered
in the field.
All models must be vented utilizing our standard two-pipe
method or our optional certified concentric adaptor.
27
SELECTION GUIDE
Determine the heat loss of the
building by referring to the calculations
and procedures, as outlined in the
ASHRAE Handbook, or other
fundamental and conventional means.
I. PROPELLER FAN UNIT HEATERS
A. From the performance data tables
(page 5), select the P.F.U.H.
whose heating output (BTU/HR)
meets or exceeds the calculated
heating load requirements.
B. From the mounting height of
the P.F.U.H., determine the throw
from the heat throw data tables
(page 29). (Should the throw be
inadequate, use a larger P.F.U.H
or a blower fan U.H. w/optional
discharge nozzle.)
EXAMPLE: Required ____ Natural
Gas P.F.U.H. can
provide 90 MBH
output. The unit must
be installed 12' from
the floor and must
provide 40' of throw.
Select _________ from
performance data
table (Page 5) select
a QVF-125 MBH input
(with a 100 MBH
output) 1650 cfm, and
a 56°F. rise.
From heat throw data chart (page 29)
see 12 ft. mounting height for QVF125 at 46 feet.
II. BLOWER TYPE UNIT HEATERS
A. From the performance data tables
(page 7), select a blower unit
heater whose heating output
(BTU/HR) meets or exceeds the
calculated heating load
requirement.
B. Performance data chart gives air
delivery (cfm) for each unit/size.
With either (cfm) or temperature
rise (▲T) known, the other can be
determined using these formulas.
Air Delivery (cfm) =
Input BTU/HR x Eff. %
1.085 x ▲T (Temp. rise)
▲T (Temp. rise ) =
Input BTU/HR x Eff. %
1.085 x cfm (Air Delivery)
C. From the mounting height of the
blower unit heater, determine the
throw from the heat throw data
tables (page 29) should the throw
be inadequate, use a discharge
nozzle for additional throw.
EXAMPLE: Required ___ Propane
Gas (LP) Gas Unit
heater that can
provide 190 MBH
heating output is
required. An airflow of
2700 CFM is desired.
The unit will be
mounted 12 feet
above the floor and a
70-foot throw is
required.
1. Select from page 7 model QVB250 with a 250 MBH input and
200 MBH heating output. An
airflow of 2700 CFM is within the
allowable range, and temperature
rise is calculated as follows:
▲T = Input BTU/HR x Eff. %
1.085 x CFM
▲T = 250,000 x 80% = 68.3°F.
1.085 x 2700
2. From page 29, throw at a 12-foot
mounting height is 68 feet, as a
68-foot throw is not adequate, a
45° nozzle can be selected (from
page 29) which provides a throw
of 77 feet.
28
III CABINET BLOWERS
A. Determine the heat loss of the
building by referring to
procedures outlined in the
ASHRAE hand book.
B. From the performance data
tables, select the cabinet blower
(CAB) that delivers the required
air flow (CFM) at the required
static pressure, and select the
proper motor size (H.P.) and fan
speed (rpm).
C. When using cabinet blower
(CAB) with a duct furnace (QVD/
QVED), refer to dimensional data
to determine proper CAB to use
with predetermined duct
furnace. Duct furnace pressure
drop (P.D.) MUST BE ADDED to
the duct system external static
pressure (E.S.P.) to determine
motor size (H.P.) and fan speed
(rpm). Enter this performance
data at the required air delivery
AND fan speed!
EXAMPLE: Given a requirement of
300,000 BTU/Hr. (input) and 4000 CFM
@ .50 external static pressure
(E.S.P.), select a QVD-300 Duct
Furnace and a CAB-4. Read across
the CAB-4 4000 CFM line to the Duct
Furnace selections column. The
pressure drop (P.D.) for the QVD-300
@ 4000 CFM is .18''. Add this P.D. to
the E.S.P. to get total static pressure
(T.S.P.) .18'' + .50'' = .68'' T.S.P.
Read down the 7'' T.S.P. column to
the CAB-4 4000 CFM line. Unit
requires a blower speed of 710
R.P.M. and a 1 H.P. motor.
Unless otherwise specified, the
following conversions may be used
for calculating SI unit measurements:
1 cubic foot = 0.028 m3
1 foot = 0.305 m
1 inch = 25.4 mm
1 psig = 6.894 kPa
1000 Btu per hour = 0.293 kW
1 inch water column = 0.249 kPa
1 gallon = 3.785 L
1000 Btu/Cu. Ft. = 37.5 MJ/m3
1 pound = 0.453 kg
1 meter/second = FPM ÷ 196.8
1 litre/second = CFM x 0.472
SEPARATE FACTORY INSTALLED ACCESSORIES [AS]
Model Number Digit 15/+
A8 - INPUT DERATE
All Models and Sizes
Factory Installed
Unit is derated up to 50% for
specific applications.
K4 - FAN TIME DELAY
Duct Furnaces
Field Installed
Thermal bi metalic type time
delay is standard on all units
except duct furnaces. Provides a
60 delay on and 45 second delay
off for blower operation.
K5 - AIR FLOW PROVE SWITCH
Duct Furnaces
Factory Installed
A Dwyer 1910-0 pressure switch
with an operating range of 0.15 0.5 inches W.C.
M6- OSHA TYPE FAN GUARD
Modes QVEF, QVSF
Factory Installed
Available on models QVEF, QVSF
only. Required for installations
that must conform with OSHA
standards. Also known as
fingerproof fan guards.
M8- DISCHARGE DUCT FLANGE ASSEMBLY
Models QVEB, QVSB
Factory Installed
(Specify - No Charge)
Used in lieu of louvers on blower
heaters for incorporating field
duct work.
P4 - TERMINAL BLOCK WIRING
Duct Furnaces
Factory Installed
Provides specific terminal
designation for field wiring.
P6 - SUMMER/WINTER SWITCH
Factory Installed
Allows operation of fan or
blower for ventilating purposes
during hot summer months
(manually operated).
S1 - 409 STAINLESS STEEL BURNERS
All Models Sizes 100-400
Factory Installed
409 stainless steel burners in lieu
of the standard aluminized steel
diverter.
S3 - 409 STAINLESS STEEL
FLUE COLLECTOR
Models QVEF, QVEB, QVES,
QVED, QVSF, QVSB, QVSD
Factory Installed
409 stainless steel flue collector
in lieu of the standard aluminized
steel collector.
SEPARATE FIELD INSTALLED ACCESSORIES [AS]
Model Number Digit 15/+
A7- PRESSURE REGULATOR 1/2-2 PSI
All Models & Sizes
Field Installed
Required where main line
pressure exceeds 14" W.C. (psig)
and not over 2 psig. One
regulator per furnace required,
shipped separately.
F1 - ONE STAGE T675A DUCTSTAT
All Blower and Ducts
Field Installed
Single pole double throw
switching. 55-75°F. setpoint
range. [2" W x 5-5/8" H x 2-7/16" D)
F2 - TWO STAGE T678A DUCTSTAT
All Blower and Ducts
Field Installed
Single pole double throw
switching. 55-75°F. setpoint
range. [2" W x 5-5/8" H x 2-7/16" D]
G1 - ONE STAGE T87K
(MERCURY-FREE) THERMOSTAT
WITH SUBBASE
Field Installed
Single stage heating thermostat.
Subbase includes fan
switching relay. Standard round
styling suitable for any decor.
40-90°F. range.
G2 - ONE STAGE T87K
WITH TG511A GUARD
Field Installed
Same features as “G1” except a
tamper proof guard is included.
G3 - ONE STAGE T834N
WITH FAN SWITCH
Field Installed
Single stage heating thermostat
with fan switch. Manufactured
exclusively for Sterling with a
“Sterling” logo face plate.
50-90°F range.
[2-7/8" W x 4-3/4" H x 1-1/2" D]
G5 - TWO STAGE TH5220D
WITH SUBBASE
Field Installed
Two stage heating and two stage
cooling with system and fan
switching and built in 10°F.
heating/cooling differential.
Includes fan and relay. 40-90°F.
range. [5-13/16" W x 3-9/16" H x 1-1/2" D]
29
G6 - LOCKING THERMOSTAT COVER
Field Installed
Universal locking thermostat
cover for use with all
thermostats listed.
G8 - ONE STAGE T6169C
LINE VOLTAGE STAT/SUBBASE
Field Installed
G9 - ONE STAGE T822K
Field Installed
Single stage heating only thermostat with subbase.
24 volt operation.
H5- LOW AMBIENT CONTROL
All Blowers and Ducts
Field Installed
Disengages duct furnace(s) from
firing in times of mild ambient
temperatures.
M2-1, 2, 3 - VENT CAP
Models QVEF, QVEB, QVED,
QVES, QVSF*, QVSB*, QVSD*
Field Installed
4, 5 or 6 inch vent cap for use
with all power vented units.
Must indicate unit size if ordered.
*(2) required per unit.
SEPARATE FIELD INSTALLED ACCESSORIES [AS] continued
M3-1 - ADAPTOR
Models QVEF, QVEB, QVED,
QVES, QVSF, QVSB, QVSD
Field Installed
4 to 5 inch flue vent adaptor for
use with 30 through 175 MBH
power vented units. Power
vented unit capacities 300, 350
and 400 require 5 to 6 inch flue
vent adaptor which is supplied
with the unit as standard
equipment.
M4- VERTICAL
CONCENTRIC FLUE KIT
Models QVSF, QVSB, QVSD
Field Installed
Allows for one 8 inch vent/
combustion air vertical
penetration through a structure.
Kit includes collection box,
5 inch flue gas vent cap and
8 inch combustion air inlet cap.
M5- HORIZONTAL
CONCENTRIC FLUE KIT
Models QVSF, QVSB, QVSD
Field Installed
Allows for one 8 inch vent/
combustion air horizontal
penetration through a structure.
Kit includes collection box, 5
inch flue gas vent cap and 8
inch combustion air inlet cap.
M7- 2 TO 4 POINT SUSPENSION KIT
Models QVEF, QVSF
Field Installed
Kit converts standard 2 point unit
heater suspension to 4 point.
P2 - ADJUSTABLE
HIGH LIMIT SWITCH
All Ducts
Field Installed
Adjustable switch used in
conjunction with the standard
header mounted high limit
switch.
P3 - ADJUSTABLE FAN SWITCH
All Ducts
Field Installed
Adjustable switch used to cycle
a separate blower.
P5 - 24 VOLT RELAY
Field Installed
Specify purpose.
Q1 - “Y” SPLITTER NOZZLE
All Propellers and Blowers
Sizes 100-400
Field Installed
Dual discharge nozzle allows the
discharge air to be supplied in
two directions. Horizontal and
vertical louvers are included.
Q2 - 30 DEGREE NOZZLE
Sizes 100-400
Field Installed
Directs the discharge air at a
30 degree angle. Air can be
directed up to a 60 degrees by
adjusting the horizontal louvers.
Louvers are supplied with the
unit heater and must be
reinstalled in the nozzle
discharge.
Sizes 100-400
Field Installed
60 degree angle. Air can be
directed up to a 90 degrees by
adjusting the horizontal louvers.
Louvers are supplied with the
unit heater and must be
reinstalled in the nozzle
discharge.
30
Sizes 100-400
Field Installed
90 degree angle. Louvers are
supplied with the unit heater
and must be reinstalled in the
nozzle discharge.
Q5 - POLY-TUBE ADAPTOR
Models QVEB, QVSB
Sizes 150-400
Field Installed
For use on models QVEB, and
QVSB sizes 150 thru 400 MBH
only. Adapts standard 24" poly
tube to standard duct flange.
Poly tube by others.
Q6 - VERTICAL LOUVERS
Field Installed
For four way air deflection on
propeller and blower heaters.
Q7 - HORIZONTAL AND
VERTICAL LOUVERS
All Ducts
Field Installed
For four way deflection on duct.
S4 - 409 STAINLESS STEEL DRAIN PAN
Models QVED, QVES
Field Installed
Condensate drain pan typically
used when cooling coils are
installed upstream of duct.
“QV” SERIES INDOOR GAS-FIRED UNIT
MODEL NUMBER DESCRIPTION
Digit
Item
S
X
X
X — 1
Prefix
2
3
UT
4
5
CA
6
7
8
9
10 11 12 13 14 15
FT
FM
GT
IC
AL
GC
SV
†
MT MS AS
(Internal Use Only)
Digit #1, 2 - Unit Type [UT]
Digit #13 - Motor Type [MT]
QVEF
QVSF
QVEB
QVSB
QVED
QVSD
QVES
1 - Open Drip Proof (Standard)
2 - Totally Enclosed
3 - Premium Efficiency, Open Drip Proof
(Blowers Only)
(P2) - Enerpak Propeller
(P3) - Separated Combustion Propeller
(B2) - Enerpak Blower
(B3) - Separated Combustion Blower
(D2) - Enerpak Duct Furnace
(D3) - Separated Combustion Duct Furnace
(D6) - Side Service Enerpak Duct Furnace
Digit #14 - Blower Motor Sizes [MS]**
A - 1/4 HP. w/Contactor
J - 1/4 HP.
B - 1/3 HP. w/Contactor
K - 1/3 HP.
C - 1/2 HP. w/Contactor
L - 1/2 HP.
D - 3/4 HP. w/Contactor
M - 3/4 HP.
F - 1 HP. w/Contactor
N - 1 HP.
G - 1-1/2 HP. w/Contactor
0 - None
H - 2 HP. w/Contactor
**Notes: 1. All 3-phase units [SV = 4, 5, 6, 7] include a contactor as standard.
Digit #3, 4, 5 - Capacity [CA]
100
125
150
175
200
225
250
300
350
400
100 - 100,000 BTU/HR
125 - 125,000 BTU/HR
150 - 150,000 BTU/HR
175 - 175,000 BTU/HR
200 - 200,000 BTU/HR
225 - 225,000 BTU/HR
250 - 250,000 BTU/HR
300 - 300,000 BTU/HR
350 - 350,000 BTU/HR
400 - 400,000 BTU/HR
*Notes : 2. All single phase units [SV = 1, 2, 3] include a contactor for units equipped with
*Notes:
1-1/2 HP. motor or higher [MS = G, H]
Digit #15 - Accessories [AS]
† All Field Installed Accessories are to be entered as a separate line item using new catalog
number which utilizes “AS” as a prefix. i.e: A7 becomes AS-A7.
*These accessories will be ordered by new catalog number as illustrated above plus with the unit
capacity (i.e. Q1 for a 100 capacity becomes AS-Q1-100).
Digit #6 - Furnace Type [FT] ††
A - Right Side Gas Connection (Standard on all models)
(Not available on QVSB & QVSF. Optional on QVSD).
B - Left Side Gas Connection (Optional on Model QVES; Standard on Models QVSB, QVSD & QVSF)
††Note: Digit #6: “A’ = Right side access to burners is available as standard on model QVES.
“B” = Left side access to burners is optional on model QVES.
All other models have only bottom access to service the burners.
Digit #7 - Heat Exchanger Construction Material [FM]
1 - Aluminized Steel
2 - 409 Stainless Steel
3 - 321 Stainless Steel
FACTORY INSTALLED
A8 - Input Derate
†FIELD INSTALLED (AS-____ )
A7 - Pressure Regulator 1/2-2 psi
K4 - Fan Time Delay (Duct Furnaces)
K5 - Air Flow Prove Switch (Duct Furnaces)
M6 - OSHA Fan Guard
M8 - Discharge Duct Flange Assembly
G1 - 1-Stage T87K Mercury Free Thermostat
w/Subase Kit
G2 - 1-Stage T87K Mercury Free Thermostat
w/TG511A Guard Kit
G3 - 1-Stage T834N Mercury Free
Thermostat/Fan Switch
(not available on separated combustion)
G5 - 2-Stage TH5220D Mercury Free Thermostat
w/Subbase
G6 - Locking Thermostat Cover (TG511A)
G8 - 1-Stage T6169C Line Voltage Stat
G9 - 1-Stage T822K Mercury Free ThermostatQ
P4 - Terminal Block Wiring
(Duct Furnaces and Blowers)
P6 - Summer/Winter Switch
Digit #8 - Gas Type [GT]
N - Natural Gas
P - Propane Gas (LP)
K - Natural Gas w/100% Shutoff
S1 - 409 Stainless Burners
S3 - 409 Stainless Flue Collector
Digit #9 - Ignition Control [IC]
2 - Spark Ignition
Digit #10 - Altitude [AL]
A - 0–1,999 ft.
B - 2,000–2,999 ft.
C - 3,000–3,999 ft.
D - 4,000–4,999 ft.
F - 5,000–5,999 ft.
G - 6,000–6,999 ft.
H - 7,000–7,999 ft.
4 - Premium Efficiency, Totally Enclosed
(Blowers Only)
0 - None
H5 - Low Ambient Control
J - 8,000–8,999 ft.
K - 9,000–9,999 ft.
L - 10,000–10,999 ft.
M - 11,000–11,999 ft.
N - Local Derate
P - Canadian High Altitude 2,000–4,500 ft.
M2-1 - Vent Cap (4")
(Unit Capacity 030-175)
Unit Capacity 200-250)
M3-1 - Adaptors (5"-4")
M4 - Vertical Concentric Flue Kit
M5 - Horizontal Concentric Flue Kit
M7 - 2 to 4 Point Suspension Kit
Digit #11 - Gas Control [GC]
A - Single Stage Gas (Standard)
B - Two Stage Gas
H - Electronic Modulation w/Room Sensing
J - Electronic Modulation w/Duct Sensing (Duct Furnaces & Blowers Only)
K - Electronic Modulation w/Duct Sensing & Room Ovrd. Stat (Duct Furnaces & Blowers Only)
L - Electronic Modulation w/External 4-20 mA Input (Duct Furnaces & Blowers Only)
N - Electronic Modulation w/External 0-10 VDC Input (Duct Furnaces & Blowers Only)
P2 - Adjustable High Limit Switch
(Duct Furnaces)
P3 - Adjustable Fan Switch
(Duct Furnaces)
P5 - 24V SPST Relay-Specify Purpose
Digit #12 - Supply Voltage [SV]*
1 - 115/1/60
5 - 230/3/60
2 - 208/1/60
6 - 460/3/60
3 - 230/1/60
7 - 575/3/60
4 - 208/3/60
Z - Special
*Note: Supply voltages [SV] 2-7 include field mounted step down transformer.
Q1* - “Y” Splitter Nozzle
Q2* - 30 Degee Nozzle
Q3* - 60 Degree Nozzle
Q4* - 90 Degree Nozzle
Q5* - Poly Tube Adaptor
Q6 - Vertical Louvers (Propellers & Blowers)
Q7 - Horizontal/Vertical Louvers
(Duct Furnaces)
*Notes:
S4 - 409 Stainless Drip Pan
(Only available on QVED and QVES)
31
WARRANTIES
LIMITED WARRANTY
STERLING GAS–FIRED HEATERS – MODELS QVEF, QVEB
SEPARATED COMBUSTION UNIT HEATERS – MODELS QVSF, QVSB
DUCT FURNACES – MODELS QVED, QVES, QVSD
1.
STERLING GAS FIRED UNIT HEATERS – QVEF, QVEB
Sterling (“the Manufacturer”) warrants to the original owner at original installation site that the above models of
Sterling Gas–Fired Heaters (“the Product”) will be free from defects in material or workmanship for one (1) year from
the date of shipment from the factory, or one and one–half (11/2) years from the date of manufacture, whichever occurs
first. Sterling further warrants that the complete heat exchanger, draft hood assembly, and burners will be free from
defects in material or workmanship for a period of ten (10) years from the date of manufacture. If upon examination by
the Manufacturer the Product is shown to have a defect in material or workmanship during the warranty period, the
Manufacturer will repair or replace, at its option, that part of the Product which is shown to be defective.
2.
STERLING SEPARATED COMBUSTION UNIT HEATERS – MODELS QVSF, QVSB
DUCT FURNACES – MODELS QVED, QVES, QVSD
Sterling (“the Manufacturer”) warrants to the original owner at original installation site that the above models of the
Sterling Separated Combustion Unit Heaters and Duct Furnaces (“the Product”) will be free from defects in material
or workmanship for one (1) year from the date of shipment from the factory. If upon examination by the Manufacturer
the Product is shown to have a defect in material or workmanship during the warranty period, the Manufacturer will
repair or replace, at its option, that part of the Product which is shown to be defective.
3.
This limited warranty does not apply:
(a)
if the Product has been subjected to misuse or neglect, has been accidentally or intentionally
damaged, has not been installed, maintained or operated in accordance with the furnished written
instructions, or has been altered or modified in any way by any unauthorized person.
(b)
to any expenses, including labor or material, incurred during removal or reinstallation of the Product.
(c)
to any damage due to corrosion by chemicals, including halogenated hydrocarbons, precipitated in
the air.
(d)
to any workmanship of the installer of the Product.
4.
This limited warranty is conditional upon:
(a)
advising the installing contractor, who will in turn notify the distributor or manufacturer.
(b)
shipment to the Manufacturer of that part of the Product thought to be defective . Goods can only be
returned with prior written approval of the Manufacturer. All returns must be freight prepaid.
(c)
determination in the reasonable opinion of the Manufacturer that there exists a defect in material or
workmanship.
5.
Repair or replacement of any part under this Limited Warranty shall not extend the duration of the warranty with respect
to such repaired or replaced part beyond the stated warranty period.
6.
THIS LIMITED WARRANTY IS IN LIEU OF ALL OTHER WARRANTIES, EITHER EXPRESS OR IMPLIED, AND ALL SUCH
OTHER WARRANTIES, INCLUDING WITHOUT LIMITATION IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS
FOR A PARTICULAR PURPOSE, ARE HEREBY DISCLAIMED AND EXCLUDED FROM THIS LIMITED WARRANTY. IN NO
EVENT SHALL THE MANUFACTURER BE LIABLE IN ANY WAY FOR ANY CONSEQUENTIAL, SPECIAL, OR INCIDENTAL
DAMAGES OF ANY NATURE WHATSOEVER, OR FOR ANY AMOUNTS IN EXCESS OF THE SELLING PRICE OF THE PRODUCT
OR ANY PARTS THEREOF FOUND TO BE DEFECTIVE. THIS LIMITED WARRANTY GIVES THE ORIGINAL OWNER OF THE
PRODUCT SPECIFIC LEGAL RIGHTS. YOU MAY ALSO HAVE OTHER RIGHTS WHICH MAY VARY BY EACH JURISDICTION.
HVAC EQUIPMENT
260 NORTH ELM ST., WESTFIELD, MA 01085
TEL: (413) 564-5540 • FAX: (413) 562-5311
www.sterlinghvac.com
In the interest of product improvement, we reserve
the right to make changes without notice.

Catalog - Sterling HVAC

Transcription

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