60-2088 - VS890A-C Combinatin Gas Control for Commercial Water

‘\_I Honeywell
-
THE
VS890
IS A SELF-POWERED
(THERMOPILE) COMBINATION GAS CONTROL
FOR
COMMERCIAL
WATER
HEATERS THAT CAN BE USED WITH
EITHER AN ENERGY CUT-OFF (ECO)
HIGH LIMIT CONTROL
OR A STANDARD CYCLING TYPE CONTROL SET
FOR
NORMAL
(LOWER)
CUTOUT
TEMPERATURES.
•I Lite-Rite gas cock to prevent accidental
shutoff of pilot flame during startup.
0 Servo type pressure regulation
constant gas input pressure.
0 Spring-loaded, diaphram type
for positive (fail-safe) closing.
to maintain
main valve
•I Installs at any angle between 0 and 90
degrees from gas cock knob upright position.
V’
q
Installation, adjustment and service controls are all located on top of the control for
ready access.
q
Designed for easy replacement of operating
controls, valve operator and pressure regulator.
-
G.S.
REV. 8-80
IMPORTANT
THE SPECIFICATIONS
GIVEN IN THIS PUBLICATION
DO NOT INCLUDE NORMAL MANUFACTURING
TOLERANCES.
THEREFORE,THISUNlT
MAY NOTMATCHTHELlSTEDSPEClFlCATlONSEXACTLY.ALSO,THISPRODUCTISTESTED
AND CALIBRATED
UNDER CLOSELY CONTROLLED
CONDITIONS,
AND SOME MINOR DIFFERENCES
IN PERFORMANCE CAN BE EXPECTED IF THOSE CONDITIONS ARE CHANGED.
MODELS:
VS890A-with
VS890B-less
VS890C-with
PRESSURE RATING: A.G.A. rating l/2 psig ( 14 in.
WC [ 3.5 kPa] ) inlet pressure. Designed for safe operation up to 28 in. WC [6.9 kPa].
ELECTRICAL
CONNECTIONS:
Combination
screw
and male quick connect terminals (4). Terminal
cover furnished.
ELECTRICAL DATA:
standard V5306A servo regulator.
servo regulator (for LP gas).
step-opening V5107A servo regulator.
VALVE SIZE AND CAPACITYa:
INLETOUTLET
(in.)
314 x 314
1.0 in. WC iO.25 kPa1
MAXIMUM
PRESSURE DROP
CAPACITY
REGULATION
u
PILOTSTAT
CAPACITY
480 cfh
r13.6 m3/hrl,
335 cfm
i9.5 m3/hrl,
;
aMax. reg. capacity on LP gas models VS890A and C
is 778 cfh I22.0 m3/hrl.
Refer to
with leak
TYPE OF GAS: Models available for all heating gases.
AMBIENT TEMPERATURE
[OCto79C].
RATING:
VALVE
OPERATOR
MOUNTING: Can be mounted 0 to 90 degrees, in any
direction, from the upright position of the gas cock
knob. Two No. lo-32 tapped mounting holes provided in bottom of body (Fig. 1).
BODY PATTERN: Straight-through.
DIMENSIONS: See Fig. 1.
PRESSURE TAPPING: l/8 NPT with plug (recess for
3/16 inch Allen wrench).
PILOT GAS OUTLET: Compression fitting for l/4
inch OD tubing.
REPLACEMENT COMPONENTS:
Valve Operator-VS824C
(4 term.)
Servo Pressure Regulators-See
Table 1.
REPLACEMENT PARTS:
1. 392395 Pilotstat Power Unit.
2. 386449 Compression
Fitting for l/4 inch OD
pilot tubing.
3. 392782 Blank Plate to cover body cavity if pressure
regulator is removed for LP gas application.
aE?ased on 1,000 6tu/ft3,
0.64
sp gr Nat. gas
[37.3 MJ/m3, 0.64 sp gr Nat. gas]. Convert for other
gases by using following conversion factors:
SERVO GAS PRESSURE REGULATORS:
Table 1 for specifications.
Equipped
limiting orifice.
POWER UNIT
32 F to 175 F
(continued
on page 3)
WHOLESALER OR YOUR DISTRIBUTOR,
REFER TO THE TRADELINE
CATALOG OR PRICE SHEETS FOR
COMPLETE ORDERING NUMBER, OR SPECIFY3. Order separately; pilot burner and Powerpile
1. Order number, including suffix letter to
generator, thermostat, high limit, and EC0
designate type pressure regulator. See Table 1
controls.
for standard pressure settings.
2. Accessories, replacement parts if required.
IF YOU HAVE ADDITIONAL
QUESTIONS, NEED FURTHER
PRODUCTS OR SERVICES, PLEASE WRITE OR PHONE:
1. YOUR LOCAL HONEYWELL
RESIDENTIAL
INFORMATION,
SALESOFFICE
OR WOULD
(CHECKWHITEPAGESDF
LIKE TO COMMENT
ON OUR
YOUR PHONE DIRECTORY).
2. RESIDENTIAL
GROUP CUSTOMER SERVICE
HONEYWELL INC., 1885 DOUGLAS DRIVE NORTH
MINNEAPOLIS,
MINNESOTA 55422 (612) 542.7500
(IN CANADA-HONEYWELL
CONTROLS
LIMITED,
740 ELLESMERE
ROAD, SCARBOROUGH,
INTERNATIONAL
SALES AND SERVICE OFFICES IN ALL PRINCIPAL CITIES OF THE WORLD.
2
ONTARIO)
TABLE 1-SERVO PRESSURE REGULATOR SPECIFICATIONS
OUTLET
COMBlNATlOh
CONTROL
MODEL
NO.
TYPE
OF
MODEL
NO.
PRESSURE
IF REGULATOR
lY--.
EGULATIOI
N
vsa9op
Standard
vsa9oa
None
PROVIDED
TYPE
STANDARD
OF
FACTORY
GAS,
V5306A
i
kPa
Nat.
3.5
0.9
LP
LP
11 .o
2.7
1 Nat* / rate; 3.5
vsa9oc
V5307A
Opening
Lp
1 rate;
0.9
full rate
full rate
2.2 step,
0.5 step,
11 .O
full rate
5
at0
12
1 0.6
in. WC
0.7 to 1.2
3to
5
2 to 3
on LP gas tank,
to 50% 1 0.15 to 50% of
1
Step-
of full rate full rate press.;
j press.; 3 to I 0.7 to 1.2 full I fullnone’
rate5 full rate
rate
3 to 5
1 .O to 50% ot 0.25 to 50% of
rate; 2.7
full rate
full rate
a to
12 full rate
press.;
kPa
0.7 to 1.2
at012
2 to 3
on adj. of regulator
45% of full 45% of full
rate;
-
1 0.17 step,
of full 45% of full
kPa
3to
OF
ADJUSTMENT
SETTINGS
in. we
Dependent
RANGE
OF OPTIONAL
FACTORY
SETTINGS
0.7 step,
TO BURNER
RANGES
in. wc
45%
Step
PRESSURE
full rate
2 to
3 full rate
press.;
Step-none;
full rate-
at?
1
Step-
1fullnone’
rate0.7 to 1.2
Stepfu~or~t~
12
2 to 3
LEADWIRE
ENTERANCE
FOR 1/4[6.4]
TUBING
O.D.
f‘
PRESSURE
TAP l/8 NPT/y+
MOUNTING
HOLES (2) /
#IO.32
X .25[6.4]
DEEPA
35410
FIG.
3’f
$$30.2]
SIDE VIEW
1-DIMENSIONS
WHEN INSTALLING
OF VS890 COMBINATION
THIS PRODUCT,.
GAS CONTROL
~1;rd7.61+i
END VIEW (OUTLET)
IN in. [mm IN BRACKETS].
.
1. Read these instructions carefully. Failure to
follow them could damage the product or cause a
hazardous condition,
Turn off gas supply before starting installation,
Be sure to conduct Gas Leak Test (page 5) after
completion.
Disconnect power supply before connecting
wiring to prevent electrical shock or equipment
damage.
Never connect a millivoltage control to line
voltage or a transformer as this may destroy the
control.
Do not remove seals over inlet and outlet of
combination gas control until ready to connect
piping.
2. Check the ratings given in the instructions and on
the product to make sure the product is suitable for your
application.
3. Installer must be a trained, experienced service
technician.
4. After installation is complete, check out product
operation as provided in these instructions.
3
60-2088-l
ROOM HEATER
(WARM AIR) INSTALLATION
Fasten
temperature-sensing
bulb in return
airstream behind heater or beneath downdraft
diverter.
Do not run tubing through hot-air discharge or other
extremely hot areas. Bulb must not be placed where
it will be affected by radiant or conducted heat. Fix
firmly in place with point-contact
supports to reduce
heat conduction.
If necessary, shield bulb from radiant
heat.
INSTALL PILOTSTAT, THERMOCOUPLE,
BURNER AND PRESSURE REGULATOR
(IF REQUIRED)
DIAL
TEST FOR GAS LEAKS
DO NOT OMIT THIS TEST
With main burner in operation, paint pipe joints,
pilot
gas tubing
indicate
connections,
and
rich soap and water
a gas leak.
To
stop
valve
solution.
leak,
THERMOCOU
VALVE
To increase temperature,
turn dial toward 9. To
decrease, turn dial toward 1. Refer to table under
SPECIFICATIONS
for equivalent temperature
values.
NOTE: Burner should operate for at least 2 hours when
determining best setting.
lines with
MAIN
PILOT
VALVE
Follow installation
instructions
packed with each
device, along with any instructions provided by furnace
or burner
manufacturer.
Fig. 5 shows a typical
installation.
SETTING TEMPERATURE
On V5155B installations, an ON-OFF valve must
be installed for main burner on-off operation.
tighten
gasket
Bubbles
joints
FIG. 5-TYPICAL
INSTALLATION
MODUSNAP VALVE.
(IF USED)
OF
V5155A
cause burner to light at setting of 1). Turn burner on
to minimum flame only, and again check for proper
ignition and operation. Repeat several times.
V5155B MODULATING
VALVE
1. The check must be made when temperature
at
bulb is within the range of the control. If temperature
is too low, set dial at 9 and allow burner to operate
until temperature at bulb is within the control range.
2. Turn dial to 1 to reach minimum flame condition.
3. Turn the separate ON-OFF control valve off,
then on again after flame has extinguished.
At the
minimum flame condition, main burner flame must not
flash back to orifice and all burner ports must light.
4. Turn off burner and allow appliance to cool. With
dial still at 1, again check burner ignition as in step 3.
Repeat several times.
and screws or replace the gasket.
RECALIBRATION
MINIMUM
Deviation from the normal setting of the temperature
control dial usually is caused by improper location or
mounting of the temperature sensing bulb. Therefore,
before recalibrating the control, review the precautions
outlined under MOUNT BULB and make any necessary
corrections.
If recalibration
is necessary, proceed as follows:
1. Choose a time when the temperature at the bulb
has been quite constant for half an hour as measured
by a reliable thermometer, and the burner is operating.
2. Remove the temperature dial and screw.
3. Turn the calibration screw just until the burner
snaps off or until burner reverts to minimum flame
condition.
4. Replace the temperature
dial and screw so that
the dial number corresponding to the room temperature
is aligned with the indicator on the valve body.
5. Recheck after the system is back in operation
to see that it is maintaining
the desired temperature.
FLAME CHECK
The pilot must be burning and the gas cock turned
to ON. To make certain ignition and flame retention
are satisfactory, proceed as follows.
~5155~ MODUSNAP VALVE
1. The check must be made when temperature at
bulb is within range of the control. If temperature is
too low, set dial at 9, and allow burner to operate until
temperature at sensing bulb is within the control range.
Then change setting back to 1 (burner goes out) and
proceed.
2. Turn dial slowly up the scale toward 9 until the
instant the valve snaps open to minimum flame. Main
burner flame must not flash back to orifice and all
burner ports must light. Adjust minimum flame, if
necessary, and recheck.
3. Turn off main burner by setting dial back to 1,
and allow appliance to cool (but not cool enough to
Page
5
60-2082-3
INSTALL
SYSTEM CONTROLS
Install the pilot burner-generator
the system controls specified by
manufacturer.
-
combination
and
the water heater
WIRING
Disconnect power supply before making wiring connections to prevent electrical shock and equipment
damage.
Follow circuit diagram provided by appliance manufacturer. If not furnished, refer to typical procedures
outlined below.
All wiring must comply with local electrical codes
and ordinances.
IMPORTANT
Never connect these millivoltage controls to
line voltage or to a transformer.
Since the entire system is powered by the millivoltage generated by the Powerpile generator, it is
important
to clean and scrape all wires before
connecting.
Solder and tape all necessary splices
using rosin flux to prevent corrosion. Tighten
terminal screws. Total control circuit wiring must
not exceed 30 ft [9 m] of a-wire, 18 gauge cable
or 50 ft [ 15 m] of a-wire, 16 gauge cable.
SCHEMATIC
THERMOSTAT
ENERGY
CUT.OFF
HIGH
LIMIT
f’iFf
z;r
1. Route generator lead to Powerpile operator and
connect to the two Powerpile terminals labeled PP.
Make certain single lead from Powerpile operator to
safety shutoff Pilotstat power unit is connected and
tightened l/4 turn beyond finger tight.
2. Connect all system controls according to the
wiring
diagram
furnished
by the water heater
manufacturer.
FIG. 4-TYPICAL
HOOKUP
FOR POWERPILE
SYSTEM
WITH
VS890
COMBINATION
CONTROL
AND
ENERGY
CUTOFF
PROTECTION.
GAS COCK SETTINGS
TEST FOR GAS LEAKS
-
The Lite-Rite gas cock knob has 3 settings (Fig. 3):
OFF-which
prevents any gas from passing through
valve to either main or pilot burner.
PILOT-which
permits gas to flow to pilot burner
only (when gas cock knob is held depressed or
when thermocouple is heated sufficiently to hold
the Pilotstat valve open).
ON-which
permits gas to flow to both main and
pilot burners when the system is functioning
properly.
PILOT LIGHTING
z
r
DO NOT OMIT THIS TEST
With main burner in operation, paint pipe joints,
pilot gas tubing connections, and valve gasket lines
with rich soap and water solution. Bubbles indicate
gas leakage. To stop leak, tighten joints and screws
or replace the gasket.
PROCEDURE
1. Slightly depress Lite-Rite knob if at PILOT
position and turn clockwise m
to OFF. Wait 5
minutes for all unburned gas to vent. Remember that
LP gas does not vent upward naturally.
2. Turn the Lite-Rite knob to PILOT, depress it
completely, and light the pilot burner. The knob must
be held down about 1 minute before the pilot burner
will stay lit after releasing the knob.
3. Turn the knob to ON, and set the thermostat
above room temperature to turn on main burner.
PILOT FLAME ADJUSTMENT
The pilot flame should envelop 3/8 to l/2 in. Es.5
to 12.7 mm] of the tip of the generator. Remove pilot
adjustment cover screw (Fig. 3). Turn inner adjustment
screw clockwise m
to decrease or counterclockwise
K-Y to increase pilot flame. Be sure to replace cover
screw after adjustment to prevent possible gas leakage.
5
60-2088-l
2. Remove cover screw (Fig. 3). Using screwdriver,
turn adjusting screw clockwise 0
to increase or .
counterclockwise
fi
to decrease gas pressure to
burner. (NOTE: Adjustment fitting is plastic and may
require slightly greater turning force than metal thread.)
Replace cover screw.
CHECK GAS INPUT AND BURNER IGNITION
VS890B PROCEDURE (no pressure regulator)
1. With main
(manometer) to
2. With main
fold pressure.
3. If pressure
facturer, readjust
1. Do not exceed input rating stamped on nameplate of appliance, or manufacturer’s
recommended burner orifice pressure for size orifice(s)
used. Make certain primary air supply to main
burner is properly adjusted for complete combustion.
Follow instructions
of appliance
manufacturer if provided.
2. IF USING METER CLOCKING METHOD:
Make certain there is no gas flow through the
meter other than to the appliance
being
checked. Other appliances must remain off,
and the pilot extinguished (or other consumption deducted from the meter reading).
3. IF USING MANIFOLD PRESSURE METHOD:
Be sure gas cock is in PILOT position before
removing pressure tap plug to connect pressure
gauge (manometer). Also turn gas cock back to
PILOT when removing gauge and replacing
plug. Repeat gas leak test at plug (main burner
must be operating).
1. With main burner operating, check input by
clocking gas meter, or check burner manifold pressure
using pressure gauge (manometer) connected to downstream pressure tapping (Fig. 3). Note that step pressure
is not adjustable.
2. If full rate adjustment is required, remove cover
screw (Fig. 3). Using a small screwdriver, turn adjusting
screw clockwise r‘\
to increase or counterclockwise
n
to decrease gas pressure to burner. Replace
cover screw.
3. Check burner
performance
at step pressure,
observing burner ignition
and flame characteristics.
Burner should ignite prompptly and without flashback
to orifice, and all ports should remain lit. Cycle
burner several times (wait 30 seconds between cycles
to allow servo regulator to resume step action).
1. Check input to main burner by clocking gas
meter or by using a pressure gauge (manometer) connected to downstream tapping (Fig. 3). The standard
natural gas model is factory set at 3.5 in. WC [0.9 kPa]
outlet pressure, and the standard LP gas model is set
at 11 in. [ 2.7 kPa] . If adjustment is required, proceed
with step 2.
CHECKOUT OF CONTROL SYSTEM
Follow instructions
of heater manufacturer
to put
system into operation.
Observe through
complete
cycle to be sure all controls function normally.
IMPORTANT
shut off by turning clockwise n
from ON to PILOT.
Pilot will remain lit-ready for return to normal service
without relighting.
2. For COMPLETE SHUTDOWN: Slightly depress
Lite-Rite knob when at PILOT position and turn clockwise /7
to OFF. Both pilot and main burner now
are shut off.
Follow the operating instructions provided by the
manufacturer of the water heater. The information
below will be of assistance in a typical control
application, but the specific controls used and the
procedures outlined by the water heater manufacturer may differ, recuirins special instructions.
KNOB SETTINGS
AUTOMATIC
Refer to Gas Cock Settings, page 5.
Follow Pilot Lighting Procedure, page 5.
TO SHUT OFF
situations:
SHUTOFF OPERATION
The automatic safety shutoff valve blocks gas flow
to the main burner and pilot burner if the pilot flame
goes out or becomes too small for adequate ignition.
If safety shutoff occurs, check pilot flame after
relighting and adjust if necessary. See Pilot Flame
Adjustment
above. If shutoff reoccurs, contact your
local dealer or gas utility to correct condition causing
shutdown.
TO LIGHT PILOT AND TURN ON
MAIN BURNER
I. For TEMPORARY
is not as specified by the heater manuregulator on LP gas storage tank.
VS89OC PROCEDURE (step-opening V5307A)
VS890A PROCEDURE (standard V5306A PRV)
LITE-RITE
burner off, connect pressure gauge
downstream pressure tapping (Fig. 3).
burner operating, check burner mani-
Main burner can be
6
PILOT WILL NOT LIGHT
1. Main gas supply must be turned on and pilot gas
supply line purged of air.
2. With Lite-Rite knob at PILOT position, depress
knob and hold during heatup period of the generator.
See Pilot Lighting Procedure.
3. Possible obstructions to gas flow:
a. Pilot gas adjustment screw closed.
b. Clogged pilot filter, tubing or orifice.
PILOT GOES OUT WHEN LITE-RITE
KNOB IS RELEASED
1. Check pilot flame adjustment.
2. Check the connection
to Pilotstat power unit
(Fig. 3). This is an electrical connection and must be
clean and secure. Also check the Powerpile generator
connections to the valve operator.
3. If power unit still does not hold in, use the W720
Systems Tester to obtain the exact open and closed
circuit output voltages of the Powerpile generator.
Compare with the Acceptable Range Charts in W720
manual. Next check resistance of Pilotstat power unit.
NOTE: For electrical data on Pilotstat power unit and
valve operator coil see SPECIFICATIONS.
in ON position, and pilot flame is properly adjusted.
(See adjustment procedure and illustration on page 5.)
2. Check Powerpile generator connections
to valve
terminals PP and PP (Fig. 4). Connections
must be
clean and secure.
3. Temporarily connect upper right terminal PP and
lower left terminal TH. If valve opens, trouble is in
thermostat-high
limit-energy
cut-off circuit. Follow
recommended
checkout
procedure
for the specific
controls used.
4. If valve still does not opena. Disconnect
leadwires to lower left terminal
TH and lower right terminal PP to isolate
valve coil from balance of circuit. Measure
resistance of valve coil (nominal
resistance
is 2 ohms-see NOTE above). If open circuit,
replace valve operator.
b. If valve coil resistance is normal, trouble is
with Powerpile generator. Use W720 Systems
Tester
to determine
open
circuit-closed
circuit output performance. Replace generator
if outside acceptable range. (If Systems Tester
is not available, replace generator with new as
check against old.)
COMPONENT REPLACEMENT
The valve operator and servo pressure regulator are
field replaceable. (Complete instructions are furnished
with the component.)
Model numbers are as follows:
1. Valve operator-VS824C.
2. Pressure regulator-Specify
per Table 1 on page 3.
If W720 or other meter is not available, first replace
Powerpile generator. If this does not correct the condition replace power unit (adjacent to the gas cock
knob-see
Fig. 3). Turn off gas supply to appliance
and remove power unit with wrench. Install and
tighten new power unit. Turn on gas supply and check
for gas leakage.
NOTE: Model number and pressure settings are stamped
on regulator casting. Replace with identical model.
GAS VALVE WILL NOT OPEN
PARTS REPLACEMENT
1. Make sure manual shutoff valve in gas supply
line to appliance is turned on, Lite-Rite gas cock is
1. 392395 Pilotstat Power Unit.
2. 386449 Comp. Fitting for pilot tubing connection.
Dear Customer,
We welcome your
comments and suggestions for improving this publication. Your assistance is greatly appreciated and will enable us to provide
better technical information for you.
HONEYWELL
MINNEAPOLIS,
MN 55408 INTERNATIONAL
Australia, Canada, Finland, France, Germany, Japan, Mexico,
Please send your comments and suggestions to:
Honeywell Inc.
10400 Yellow Circle Drive
Minnetonka,
Minnesota 55343
ATTN: Publications Supervisor MN38-3247
Sales Offices in all principal cities of the world. Manufacturing
Netherlands, Spain, Taiwan, United Kingdom, U.S.A.
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in
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