Novenco Air Handling Units

Novenco Air Handling Units
Climaster ZCN – Installation and maintenance
917061-0 – GB
Important
This document is provided ‘As is’ and is subject to change
without notice. Novenco reserves this right due to continuous product development.
Copyright (c) 1998 – 2010, Novenco.
All rights reserved.
Trademarks
Novenco is a trademark of Novenco.
Other trademarks appearing in this document are the
property of their respective owners.
New editions of this guide can be found on
www.novencogroup.com.
2 ZCN
Contents
1.
General Introduction
2.
Application
3.
Handling
3.1
3.2
3.3
Weight
Assembled units
Sections
4.
Reception on Site
5.
Storage
6.
Scope of supply
6.1
6.2
6.3
6.4
6.5
6.6
6.7
7.
Base frame
Sections/Nameplate
Sealing material
Internal assembly of
sections
Plastic coverings
Handles and square key
Packing of accessories
Assembly
7.1
7.2
7.3
7.4
8.
9.2
9.3
9.4
9.5
9.6
Dampers in cross-flow
plate type heat exchanger
Torque for dampers
Maintenance
Damper motors
Connecting rod
10. Filters
10.1 Filter guard
10.2 Change of filter/cleaning
10.3 Life
10.4 Recommended final
pressure losses for filters
10.5 Replacement filters
11. Rotary Wheel Type Heat
Exchanger
11.1
11.2
11.3
Drive systems
Check of rotor position
in rotor casing
Adjustment of rotor
position in rotor casing
Purging sector
Rotor bearings
Belt drive
Cleaning
Base frame
Alignment of base frame
Sections
Assembly of sections,
degreasing and sealing
7.5 Mounting of roofing
sheets
7.6 Mounting of AHU outdoors
7.7 Pipe layout
7.8 Electric connections
7.9 Duct connection
7.10 Water trap
7.11 Baffle plate
12. Cross-Flow Plate Type
Heat Exchanger
Description of Unit
Casing
13. Heating and Cooling
Coils
8.1
8.2
8.3
8.4
8.5
Panels
Doors
Cleaning
Leakage
Conditions near the air
handling unit
9. Dampers
9.1
Mounting of damper
motors
11.4
11.5
11.6
11.7
12.1 Heat exchanger/damper
12.2 Drip pans
12.3 Dismounting of heat exchanger
12.4 Maintenance
12.5 Cleaning
13.1 Pipe connections
13.2 Cleaning
13.3 Dismounting of heating
and cooling coils
13.4 Frost protection
13.5 Electric heating coil
13.6 Maximum thermostat
13.7 Overheat thermostat
13.8 Automatic control and
safety functions
13.9 Check of thermostats
13.10 Check of wire connections
14. Centrifugal Fans
14.1
14.2
14.3
14.4
14.5
14.6
14.7
14.8
14.9
Storage
Electric connections
Prior to start of operation
Starting procedure
General inspection and
maintenance
Dismounting of fan unit
for servicing
Tensioning and changing of belts
Fan bearings
Change of bearings
15. Axial Flow Fans
15.1
15.2
15.3
15.4
15.5
15.6
15.7
15.8
15.9
15.10
Storage
Electric connections
Prior to start of operation
Starting procedure
General inspection and
maintenance
Dismounting of fan unit
for servicing and cleaning
Dismounting of motor
Mounting of motor
Blade pitch adjustment
Air quantity meter
16. Plug Fans
16.1
16.2
16.3
16.4
16.5
Storage
Electric connections
Prior to start of operation
Starting procedure
General inspection and
maintenance
16.6 Dismounting of fan unit
for servicing
16.7 Air quantity meter
17. Motors for Fans
18. Silencer
18.1 Cleaning
19. Humidifier
20. Declaration of
Conformity
ZCN
3
1. General Introduction
The instructions describe installation and maintenance. Components
included in the air handling unit are
described in a separate section.
In the table of contents all sections
are described and numbered, and
both installation and maintenance
instructions are collected under one
heading.
2. Application
Climaster type ZCN is suitable for
commercial ventilating systems and
also industrial installations to meet
specific requirements for air condition and air quantity.
3. Handling
Fig. 3.1 – Hoisting of a complete air handling unit
3.1 Weight
The total weight and dimension and
also the weight and dimension of the
individual sections are stated on the
print-out from the computer calculation program for Climaster units.
3.2 Assembled units
An assembled unit type ZCN can be
transported by fork-lift truck or lifted by crane in the hoisting lugs
mounted on the base frame, fig. 3.1.
3.3 Sections
Each section is provided with four
transport feet permitting transport
by fork-lift.
Note: The forks of the truck must reach
the full width of the unit and lift against
the frame on both sides of the section.
Any kind of traffic or storage on top of
the unit must not take place.
Hoisting of sections can take place
by lifting by crane in the four hoisting lugs, fig. 3.2, mounted on the top
corners of the sections. For safety
reasons a shekel must be used as
4 ZCN
Fig. 3.2
shown on figure 3.3 when lifting by
crane.
4. Reception on Site
On arrival to the erection site check
the unit for transportation damage,
also check whether the extent of supply is complete.
Notify the supplier of any damage or defect immediately.
Fig. 3.3
5. Storage
The units type ZCN are supplied
packed in plastic. If the units are
stored outdoors, cover them in such
a way that there is ventilation under
the cover in order to avoid condensation. Outdoor storage must be of
short duration.
If the units are stored for a long time,
remove the plastic packing in order
to avoid condensation, and store the
units indoors in a dry place.
Painted units are normally supplied
on a wooden pallet and packed in a
blister pack and must be stored indoors.
Complete units with roof intended
for outdoor mounting can be stored
outside, but to avoid soiling at the
building site, cover the units so that
there is ventilation under the cover.
6. Scope of Supply
An air handling unit type ZCN supplied unassembled in sections consists of:
6.1 Base frame
The base frame with transverse base
angles (1) for ZCN is supplied unassembled and comprises the necessary parts incl. of bolts and fittings
(3+4) for attachment of unit to the
base frame and also a number of set
screws (5) for alignment of the base
frame.
The base frame is packed on a small
pallet.
Fittings and set screws are included
in the packing for accessories.
6.2 Sections/Nameplate
The sections are marked from 1 to x
on the nameplate of each section.
Please see next page.
Fig. 6.0
6.3 Sealing material
6.7 Packing of accessories
For each unit the necessary quantity
of adhesive sealing strips (6) 12 x 6.4
mm is supplied for sealing of joints.
The sealing material is included in
the packing for accessories.
All accessories mentioned above are
packed in one or two cardboard boxes depending on quantity and put
down separately on the packing list.
The parts are shown on fig. 6.0 and
described under the relevant heads.
6.4 Internal assembly of
sections
The sections are provided with four
internal corner plates with free hole
for assembly by means of an 8x25
mm hexagon-headed screw and an 8
mm square nut (7). Sides longer than
1500 mm are also provided with a fitting mid-side.
6.5 Plastic coverings
Each unit is supplied with the necessary number of coverings (8) with
plugs (9) for covering of the corners
when the hoisting lugs have been removed.
6.6 Handles and square key
A square key (11) is always supplied.
Handles (12) are supplied if ordered.
If the fan is unprotected, do not mount
handles on doors giving access to the fan.
The doors must be opened by means of
the square key.
The parts are included in the packing
for accessories with screws and
plugs (2).
ZCN
5
7. Assembly
and erection of air handling units.
A free area in the full length of the
unit should be reserved in front of
the access side for inspection and
servicing purposes.
For inspection: At least 750 mm - allowing the doors to be fully opened.
For service: It is recommended that
the service area is just as broad as the
unit allowing all components in the
unit to be pulled out without hindrance.
Fig. 7.1
Fig. 7.4
7.1 Base frame
Assemble base frame as shown on
fig. 7.1.
The base angle may be composed of
several pieces which are joined by
means of fish joints, fig. 7.2.
7.2 Alignment of base frame
The base frame must be completely
straight. For alignment set screws
are supplied.
There are holes in the base angles for
set screws so that the distance between the set screws never exceeds
1300 mm. Set screws must always be
mounted under the fish-joints, fig.
7.2. The distance between points of
support must never exceed 1300
mm.
This applies to both assembled and
sectionalised units and whether set
Fig. 7.2
Fig. 7.5
Fig. 7.3
screws or any other form of support
are used.
Industrivej 22 DK-4700 Naestved, Denmark
Type/
Size
ZCN 13/6 L
Serial/
Order No. 309711/0079-2000-4
Description
ACG-400/230, Max. 4695 RPM
Marking
6 ZCN
Casing
No.
1
Function
Code
AC
7.3 Sections
After alignment of the base frame,
position the sections. It appears from
the sections how they are to be assembled.
The number of the section appears
from the nameplate:
Remove the transport feet before
placing a section on the base frame,
then mount and fasten the plastic
coverings (8) fig. 7.5 by means of the
enclosed plugs (9).
the corner plates cannot be any larger. Sides longer than 1500 mm are also joined in the middle, fig. 7.8.2.
Fig. 7.6
After placing the section on the base
frame (or underlying sections), remove the hoisting lugs, fig. 7.3 and
mount the plastic coverings, fig. 7.4.
Access to the inside of the unit is obtained through the inspection doors
or by removing the side panel, see
item 8.1 and fig. 8.1. If necessary, pull
out a function if it is in the way. Place
the screws in the fittings and tighten
them crosswise by means of a 6 mm
hexagon spanner until there is a gap
of approx. 1 mm between the sections, fig. 7.8.3.
Fig. 7.8.3
Sealing strip
7.4 Assembly of sections,
degreasing and sealing
After placing section 1 at the end of
the base frame, fasten it by means of
fittings screwed on to the corners of
the frame, fig. 7.5, and mount the fittings, fig. 7.6, on the side by means of
6.3 x 13 mm self-tapping screws. Attach the sealing strip to the frame
along the inside edge of one of the
sections, fig. 7.7.
Prior to attaching the sealing strip,
degrease the frame by means of a
suitable degreasing agent, e. g. alkaline degreasing agent HP2000 diluted with water in the ratio 1 to 10.
After that place section 2 on the base
frame and push it as close to section
1 as possible. Be careful that the sections meet precisely and are aligned
according to the base frame or the
underlying sections.
Assemble the sections by means of
screws in the internal corner plates
on the frame fig. 7.8.1, it is very important that the base frame is completely plane and horizontal. The
frame will twist if the base frame is
not plane and it can be difficult to
mount screws and square nuts in the
corner plates. In order to ensure correct assembly of the sections, holes in
Fig. 7.8.4
Fig. 7.7
Fig. 7.8.1
Mount the remaining fittings at regular intervals along the sides by
means of 6.3 x 13 mm self-tapping
screws, fig. 7.6.
After assembling the bottom layer of
a unit with two air flows, mount the
sections at the top in the same way
and align the sections with the underlying sections. Finally, drill a
5.5 mm hole in each doorway
through the frame profiles, fig. 7.8.4,
and screw them together by means
of a 6.3 x 13 mm sheet metal screw.
Screw in two screws in the doorway
to the fan.
Fig. 7.8.2
ZCN
7
7.5 Mounting of roofing sheets
1. Attach sealing strip to unit. Fig. 7.11.
2. Put in tubular rivets in the cover profiles. Fig. 7.12.
4. Drill holes in unit fig. 7.14 and fasten
cover profile with screws.
5. Mount roofing sheets by placing upward bent edge of roofing sheet under
cover profile and putting roofing sheet
down on unit. Fig. 7.15.
7. Attach sealing strips to remaining
roofing sheets and place them on unit.
Fig. 7.17.
8. After that rivet roofing sheets.
Fig. 7.18.
9. Fasten roofing sheets to cover profiles.
Fig. 7.19.
3. Place cover profile on unit, the position is found by lowering the tubular
rivets between the frame and panels. After that push cover profile towards end of
unit. Fig. 7.13.
If the number of sections is uneven, use
the holes nearest the end, and if the
number of sections is even, use the holes
farthest away from the end.
8 ZCN
6. Put a channel section on unit in order
to obtain the right fall of roofing sheets.
Fig. 7.16.
10. Drill holes in unit fig. 7.20 and fasten roofing sheets with screws – do not
forget nylon washer.
11. Now fasten cover profile and roofing
sheets. Fig. 7.21.
12. Mount U-cleats on roof joints.
Fig. 7.22).
13. Insert plugs at the ends of the U-cleats.
Fig. 7.23).
7.6Mounting of AHU outdoors
Do not use the air handling unit as
part of the roof of the building. This
means that there must be a complete
roof under the unit.
All vertical and horizontal joints between the individual sections on
units installed outdoors must be
carefully sealed with a weather resisting joint filler, e.g. a suitable silicone. Degrease the surfaces carefully
before jointing.
ZCN
9
7.7 Pipe layout
Pipe layout must not hamper door
opening, inspection and operation
of the air handling unit.
Pipe inlets in panels are provided
with a seal on the inner sheet of the
panel. The seal is mounted in the
panel from the outside.
Inside
Outside
7.8 Electric connections
Cable inlets in panels must be air
leakage-tight and ensured against
damage of sharp edges.
Do not lead cable through the inspection doors. Cut hole for cable inlet with locksaw and mount cable inlets as for example shown on fig.
7.24. The leakage-tight inlet is on the
inner side of the panel while the gasket in the outside panel only protects
the cable from the sharp edge
Electric installations must be performed
by authorized personnel and so that they
protect against electric shocks.
Connect electric parts (fan motors,
damper motors, electric heating elements, automatic control components
etc.) with approved cable (moving parts,
e.g. fan motors, with rubber cable) and
according to current regulations.
Safety switches must be installed according to appropriate regulations.
For further details about electric connection, please see under the individual headings.
Hole in sheet
Outside cable
diameter
19 mm
7-10 mm
23 mm
10-14 mm
29 mm
14-20 mm
38 mm
20-26 mm
48 mm
26-35 mm
10 ZCN
Fig. 7.24
Example of cable inlet in panel.
7.9 Duct connection
Connect ducts to the inlet and outlet
openings of the air handling units by
means of LS-cleats, fig. 7.25. Normally, it is not necessary to use flexible connections for the duct connection (anti-vibration mountings and
flexible connections are built into the
unit between fan and casing). However, external flexible connections
for mounting with LS-cleats are
available as accessories.
Air Handling Flexible
Unit
connection
the unit are without thread and Ø32
mm outside.
In order to work, the height of the
water in the water trap (H-measurement) must be higher than the pressure height in the unit (Δp inside/
outside in the unit at the water trap).
Example.: Δp = 550 Pa. The H-measurement must be at least 55 mm and
to this must be added the increased
pressure loss for fouling of the filters
and also 10 mm for safety: min. 300
Pa corresponding to 30 mm. This results in the fact that min. H-measurement must be 85 mm. It is recommended to make the H-measurement as high as possible.
Shorten pipe (6) if the water trap is
too high.
Extend drain (9) from water trap to
drain with a fall of min. 3‰.
The end of the drain pipe must be
open above the drain. A water trap
must be mounted for every drip pan
in the unit. Several water traps can
be connected to drain (9), but the fall
must always be at least 3‰ on all
drain pipes and the end of the drain
pipe must always be open above the
drain in the floor.
Duct
Fig. 7.25. Connection by means of
LS-cleat.
7.10 Water trap
Drains from “wet” sections (cooling
coils, cross-flow plate type heat exchangers, humidifiers and filters)
must be provided with a water trap.
Novenco is able to supply a water
trap made of plastic, fig. 7.26. The
water trap is designed for negative
pressure and is provided with a ball
so that it is tight also without being
filled with water. Connect the water
trap to the drain from the drip pan of
the unit. All drains from drip pans in
Fig. 7.26
1.
2.
3.
4.
5.
6.
7.
8.
9.
Set screw with foot
Base frame
Drip pan
Drain connection ∅32 mm outside, without thread
Angle
Pipe ∅32 mm
Water trap
Ball
Drain ∅32 mm outside, without thread
Max. negative pressure for water
trap in unit with adjustable feet is
1200 Pa.
7.11 Baffle plate
8.2 Doors
8.3 Cleaning
Mount baffle plate on outlet flange
for centrifugal fan with free outlet
without duct connection. Use Ucleats for mounting of baffle plate.
Mount corner coverings on the corners of the U-cleats. U-cleats and corner coverings are supplied along
with the unit.
The access side is provided with
tight-fitting doors which in principle
are constructed the same as the panels. The doors are provided with a
mechanically attached rubber sealing strip. The hinges are adjustable.
By loosening screws with inside
hexagon head in the rear edge of the
door, the door can be adjusted vertically and horizontally. After the adjustment tighten the screws again.
.
The inner surface of the Climaster
casing must be cleaned for dust and
other impurities, especially in front
of the filters. Cleaning is carried out
by means of a vacuum cleaner in order to remove all impurities so they
are not blown into the room. Clean
the silencers in the same way as the
Climaster casing.
Detailed maintenance instructions
for components included in the air
handling unit type ZCN are available in the subsequent sections.
8. Description of Unit Casing
The casing of the unit is constructed
of a frame enclosed by panels. The
frame is assembled by means of insertion joints and has soft rounded
edges. The unit casing is smooth inside ensuring easy cleaning.
8.4 Leakage
8.1 Panels
The panels are 50 mm thick and consist of double-layer sheet steel with
intermediate mineral wool. The side
panels are screwed onto the frame
structure by means of self-tapping
screws 6.3 x 13 mm, with a width of
socket spanner of 10 mm. The outside diameter of the socket spanner
must be max. 14 mm in order to go
through the hole in the outer sheet of
the panel. This hole is covered by a
black plastic hole plug. The end, top
and bottom panels are fastened to
the frame from the inside by means
of self-tapping screws.
Each panel is provided with an adhesive sealing strip (9x4.5 mm).
.
fig. 8.2.
The doors are provided with tongue
locks which are operated by means
of the enclosed 8 mm square key or
handles are mounted. The doors
have a 180° free swing ensuring easy
access for inspection and service.
.
If the panels or doors are provided
with for example temperature detectors, the packing must be mounted
on the inner panel plate. The hole in
the outer plate of the panel has no influence on the tightness of the unit.
The sealing strips of the inspection
doors must be intact.
On removal and subsequent mounting of panels it is important that the
packings are leakage-free. Normally,
it is necessary to replace the adhesive
sealing strip (9 x 4.5 mm).
Pipe and cable inlets must be leakage-free.
Check at intervals that duct connections and flexible connections are
leakage-free.
8.5 Conditions near the air
handling unit
Air intake must be kept free of foreign material (paper, leaves etc.).
fig. 8.3.
fig 8.1
The doors can be removed by removing the pintle from the hinges,
fig. 8.3.
Recommended cleaning intervals
(Please see the individual components as well):
General inspection:
Once a month.
Minor internal cleaning:
First time after 1 month of
operation.
Afterwards every third month.
ZCN
11
Filter check:
First time after 1 month of
operation.
Afterwards every third month.
Check of remaining sections:
Every third month.
Thorough overhaul of the entire
unit:
Once a year.
9. Dampers
The damper consists of a number of
aluminium damper blades mounted
in synthetic bearings in a frame. The
movement of the damper takes place
by means of a coupling plate with
slots for regulating arms with rustproof pins mounted on the individual damper shafts, fig. 9.1.
Inside and outside dampers are
mounted in/on the unit by means of
LS-cleats.
Retaining ring
The torque of the damper motor
must be equal to or greater than the
torques in the table.
Pinol screw
9.4 Maintenance
Shaft extension
Guide pin
Fig. 9.2
After electric connection of the damper motor, adjust the movement of
the damper motor and damper
blades to each other as shown in the
installation instructions for the
damper motor.
9.2 Dampers in cross-flow plate
type heat exchangers
The inclined shut-off damper is
mounted direct on the heat exchanger.
The inclined by-pass damper is
mounted next to the heat exchanger
so that the shafts of the dampers are
end to end.
9.3 Torque for dampers
Shaft arm
Guide bearing
Coupling disc
Fig. 9.1
9.1 Mounting of damper motors
The dampers on the unit are designed for mounting of Belimo
damper motors. One damper shaft
on each damper is provided with a
shaft extension Ø15 x 80 mm for direct mounting of damper motor type
SM/FM, fig. 9.2.
12 ZCN
AHU type
Moment Nm
ZCN-9/6
ZCN-13/6
ZCN-13/8
ZCN-18/8
ZCN-18/10
ZCN-18/12
ZCN-18/15
ZCN-18/18
ZCN-21/21
8
8
14
14
20
20
30
30
30
The shut-off and by-pass dampers
are by means of operating-lever devices connected to two shafts for individual regulation or to a common
shaft for coupled regulation. Mount
the damper motor direct on the shaft
as described above. For coupled
dampers the above values should be
multiplied by two.
In practice the SJD damper is maintenance-free, but make sure that the
damper is kept clear of dust and dirt.
This applies to both air path and regulating mechanism outside the air
path.
Furthermore, a regulation free of
problems is guaranteed by always
making sure the regulator is lubricated, e.g. with graphite grease,
where moving metal parts slide
against each other. Pay especially attention to this if the air stream has a
degreasing effect.
9.5 Damper motors
Maintain damper motors according
to instructions from the motor suppliers.
If another type of damper motor is
used it is important to know the regulating moment of the damper. The
various regulating moments are
shown in the above table.
9.6 Connecting rod
Metal connecting rods (ball joint) between two dampers or for damper
motor must be kept clean and well
greased.
If the damper rod is removed during
servicing, the damper motion must
be re-set accurately, as too early impact on closing the damper can overload the damper motor and damage
the damper.
10. Filters
The air handling unit is provided
with one or several of the filter types
shown on this page. Fine filters of
high gravimetric efficiency are often
supplemented by a prefilter of the
basic filter type.
The filters, marked with type, are inserted in retainers and fastened by
means of locking rails which press
the filter frame against the rubber
packing. The filters are released by
pushing the handles of the rails, fig.
10.1. However, panel type filters are
mounted in U-rails.
Recommended final pressure loss
may be lower than stated in the table
as the air quantity must not vary
more than ±10%.
1
2
10.5 Replacement filters
On the filter frame a sign with the
necessary data for reordering of filters is located:
– Filter type order No.
3
Fig. 10.2
Panel type filter FS (synthetic)
10.2 Change of filter/cleaning
All filters – apart from metal type filter FM, which can be cleaned by
washing – are disposable and are replaced when the recommended final
pressure loss has been obtained.
Panel type filter FM (metal)
10.3 Life
Fig. 10.1
10.1 Filter guard
Three types of filter guards are available, fig. 10.2:
1 U-pipe manometer
2 Manometer with logarithmic
scale
3 Micromanometer
The door of the filter section is provided with two hose connections
which are led to points of measurement on both sides of the filter.
When supplied, the manometer is
mounted on the door of the filter section.
When starting up fill up with the
manometric liquid supplied and
connect the hoses to the manometer.
The life of the filters depends on the
operational process and dust concentration in the air.
Checking of the pressure drop
should take place regularly. It is advised not to extend the life by exceeding the recommended pressure
drops, as the air quantity and efficiency of the system is reduced.
Dust build-up in the filters can create
unhygienic conditions in the system.
Pocket type filter FG (basic filter)
10.4 Recommended final pressure losses for filters
Pocket filter FF (fine filter)
G2
Perm Alu
150 Pa
G4
AM 300
150 Pa
G4
Pocket filter
150 Pa
F5
Pocket filter
200 Pa
F6
Pocket-/compact filter
200 Pa
F7
Pocket-/compact filter
200 Pa
F8
Pocket-/compact filter
300 Pa
Compact filter FF (fine filter)
ZCN
13
11. Rotary Wheel Type Heat
Exchanger
depending on the position of the rotary wheel type heat exchanger.
ый
тн
ра х
Обозду
в
11.1 Drive system
ий
еж х
Свозду
в
ий
еж х
Свозду
в
й
ны
рат х
Обозду
в
94138LA
94138LA
94138LB
94138LB
The drive system consists of either a
system for automatic control of the
rotor speed or a geared motor for
constant rotor speed.
The drive system is mounted in the
return air part of the rotary wheel
type heat exchanger. Fig. 11.3 and
fig. 11.4 control box and motor are located on the same bracket.
О
возбрат
ду ны
х й
С
во веж
зду ий
х
С
возвеж
ду ий
х
Fig. 11
О
во брат
зду ны
х й
94138RA
94138RA
The rotary wheel type heat exchanger consists of a rotor and a drive system. The rotor has internal ball bearings and is fastened to the casing by
screws through an adjusting disc (eccentric), a slot in the frame and a disc
at the end of the shaft fig. 11.1. and
fig. 11.2.
94138RB
94138RB
Rotary wheel for ZCN 9/6 to 13/8
on the frame. Only the rotor side opposite the purging sector is provided
with a brush seal. In ZCN 18/8 to
18/15 all brush seals are mounted on
the frame. However, there is no
brush seal at the discharge side of the
fresh air.
The purging sector and drive system
are located as shown on the sketches
ый
тн
ра х
Обозду
в
Fig11.2
Fig11.1
Location of brush seal, purging sector, measuring taps and a drive system
In ZCN 9/6 to 13/8 the brush strip
forming the seal along the circumference of the rotor is mounted on the
rotor whereas the brush strips forming the seals between the top and
bottom air flows lengthwise and
crosswise of the rotor are mounted
14 ZCN
Fig. 11.3 EMS control box
ий
еж х
Свозду
в
ий
еж х
Свозду
в
Fig. 11.4 EMS Drive motor
й
ны
рат х
Обозду
в
1881815LA
1881815LA
1881815LB
1881815LB
С
возвежи
ду й
х
Об
ра
возтный
ду
х
С
возвежи
ду й
х
1881815RA
1881815RA
Об
ра
возтный
ду
х
1881815RB
1881815RB
Rotary wheel for ZCN 18/8 to 18/15
EMS system for automatic operation
of the rotor is easy to use as the drive
system does not require any adjustment. The motor is a special motor
without gear and can only operate
together with the control unit.
Built-in functions in model S are:
• Automatic purging operation
• Rotation guard with external rotation sensor
• Alarm relay
• Test change-over switch
The electric connection 1 x 230V and
connection of control signal and
alarm, if any, is made in the control
unit, whereas internal connections
between control unit and motor and
between control unit and rotation
sensor are made before leaving the
factory.
In units ZCN 9/6 to 18/8 EMS VVX
15 S is used.
In units ZCN 18/10 to 18/15 EMS
VVX 25 S is used.
DIP change-over switches nos. 7 and
8 for max speed are for ZCN 9/6 set
on 80 per cent whereas they are set
on 100 per cent for ZCN 13/6 to 18/
15. Max speed of the rotor is 11-12
r.p.m.
For more detailed wiring instructions, connection of control signals
and setting of DIP change-over
switches, please see the special manual enclosed in the rotary wheel type
heat exchanger section.
Geared motor for constant speed:
This geared motor is for 230/400V 50
Hz and connection is made as shown
in the terminal box of the motor. The
geared motor is maintenance-free.
Prior to inspection and servicing, stop
fan and rotor before opening doors.
11.2 Check of rotor position in rotor
casing
Before leaving the factory the rotor is
aligned so that it runs correctly in the
rotor section. This alignment might
change in transit or during the handling and installation of the rotor
section. Before putting the unit into
operation, check that the gap (approx. 18 mm) between rotor and casing is exactly the same along the
whole circumference of the rotor
where the brush strip forms a seal
between the air flows.
11.3 Adjustment of rotor position
in rotor casing
The rotor is fastened to the casing by
screws through an adjusting disc (eccentric), a slot in the frame and a disc
at the end of the shaft. Thus the rotor
position in the casing can be adjusted, fig. 11.2.
If the gap is not exactly the same
along the whole circumference of the
rotor, it must be adjusted:
Remove cover above adjusting
screw, fig. 11.5.
Loosen screw in shaft end and adjust
rotor by means of the adjusting disc
till gap between rotor and casing is
exactly the same along the whole circumference of the rotor, fig. 11.6.
In ZCN 9/4 up to and including 18/
10 the wrench opening is 32 mm for
the adjusting disc.
In ZCN 18/12 and 18/15 the wrench
opening is 41 mm.
After adjustment remount cover
above adjustment disc, fig. 11.7.
Check at suitable intervals during
the working period that brush seals
everywhere fit tightly against the rotor surface.
In ZCN 9/6 to 13/8 there is only an
eccentric in the side at the purging
sector. In ZCN 18/8 to 18/15 there
are eccentrics in both sides.
Fig. 11.5
Fig. 11.6
Wiring diagram for EMS WX 15 and 25
ZCN
15
11.4 Purging Sector
In a rotary wheel type heat exchanger leakages between the fresh air and
discharge air ducts cannot be completely eliminated.
By making sure that p11 < p22 and p12
< p21 transfer of polluted discharge
air to fresh air through leakages can
be avoided.
Owing to the rotation of the heat exchanger a certain amount of polluted
discharge air is mixed with the fresh
air where the heat exchanger travels
from the discharge air duct to the
fresh air duct. Therefore, the heat exchanger is provided with a purging
sector, located where the rotor travels from the discharge air duct to the
fresh air duct, fig. 11.7.
The purging sector can be adjusted
into 7 positions, from position 0 to position 6. When delivered the purging
sector is set on position 0. In heat exchangers where the fresh air duct is
located at the bottom, the rotor must
travel downward when looked at
from the access side. Adjust the purging sector upwards, so that position 6
is the upper hole. The reverse is the
case in heat exchangers where the
fresh air duct is located at the top,
here the rotor must travel upward
when looked at from the access side.
Adjust the purging sector downward
and position 6 is thus the bottom hole.
Sizes 9/4 – 13/8 are provided with
nine holes of which the two holes on
the other side of position 0 are not
used.
The purging sector must be adjusted
according to the pressure of the system: p22-p12 in accordance with the
below table.
Setting
of sector
Differential pressure
[Pa]
Position 6
0 < p22 - p12 < 185*
Position 5
185 < p22 - p12 < 240
Position 4
240 < p22 - p12 < 335
Position 3
335 < p22 - p12 < 535
Position 2
535 < p22 - p12 < 1300
Position 1
Position 0
1300 < p22 - p12
p22 - p12 < 0**
*
Imperfect purging at
p22 - p12 < 150 Pa
** No purging at p22 - p12 < 0 Pa
Measuring tap - p12
Measuring tap - p22
Discharge air q11 - p11
Fresh air q22 - p22
Fig. 11.7 Purging sector
16 ZCN
11.5 Rotor bearings
The rotor bearings are ball bearings
which cannot be regreased. When
the working lives of the bearings
have come to an end, they must be
replaced. The replacement should be
carried out by a serviceman.
11.6 Belt drive
The belt drive has an elastic belt
which does not require any maintenance. The elasticity of the belt is
”belt tension”. The rotor can be provided with a spare belt, if ordered
when ordering the unit.
If the belt bursts, use the spare belt
and provide the rotor with a new
spare belt at the first opportunity.
This work should be carried out by a
serviceman as the belt has to be
welded together.
11.7 Cleaning
Even though the unit is provided
with filters dust may be accumulated on the surface of the rotor from
time to time. In order to avoid a reduction of the system performance
the rotor must be cleaned at suitable
intervals. Access for cleaning of the
rotor is obtained by opening the inspection doors opposite the filters
and pulling out the filters or - if the
unit is provided with an inspection
room type DA - by opening the
doors of the inspection room.
Clean the rotor by means of a vacuum cleaner with nozzle with a soft
brush or by blowing through the rotor with compressed air. If compressed air is used, purging must be
carried out from the clean side towards the dust-coated side. Finally,
vacuum clean and dry the unit.
12. Cross-Flow Plate Type
Heat Exchanger
Fig. 12.1
The heat exchanger section is constructed of a cross-flow plate type
heat exchanger with a large number
of narrow passages through which
the warm and cold air streams pass
each other, separated by thin metal
sheets.
The cross-flow plate type heat exchanger section can be with by-pass
and then the exchanger block only
takes up part of the width while the
rest of the width is made up by the
by-pass duct.
In the sizes 9/6 - 13/8 the heat exchanger is made as a block and the
by-pass duct is mounted in the back
of the section opposite the access
side.
The shut-off damper and by-pass
damper can be operated individually by two damper motors or be coupled so that both dampers are operated by one damper motor.
In the sizes 18/8 - 18/12 the heat exchanger is divided into two blocks
with the by-pass duct between them.
The two shut-off dampers are always coupled so that they are operated as one damper.
The shut-off dampers and by-pass
damper can be operated by two
damper motors or all three dampers
can be coupled so that they are operated by one damper motor.
For torque of the damper motors
please see “Damper” section 9.3.
rn air
Retu
rn air
Retu
h air
Fres
h air
Fres
h air
Fres
h air
Fres
rn air
Retu
rn air
Retu
Fig. 12.3
Fig. 12.2
rn air
rn air
Retu
Retu
h air
Fres
rn air
Retu
Fig. 12.4
h air
Fres
h air
Fres
h air
Fres
rn air
Retu
Fig. 12.5
ZCN
17
12.1 Heat exchanger/damper
When the cross-flow plate type heat
exchanger section is provided with a
by-pass duct, the fresh air may be bypassed the heat exchanger by means
of an inclined damper arrangement
with 2(3) dampers, mounted direct
on the heat exchanger and by-pass
duct.
The damper arrangement is prepared for mounting of Belimo damper motors on an 8 mm square shaft
and made in two variants:
1) Prepared for mounting of two
damper motors for individual regulation of the two air streams.
2) Coupled for mounting of one
damper motor so that the by-pass
duct is shut off when the heat exchanger is opened and vice versa.
12.2 Drip pans
The heat exchanger section is provided with two drip pans, one on
each side of the heat exchanger, for
catching and draining off of condensate and wash water, if any.
The drip pans are provided with a
drain each which is Ø32 mm outside
and without thread. The drains are
extended through the fan casing,
both drains must be provided with a
water trap each. See section “7.10
Water trap” on page 10. If required,
the cross-flow plate type heat exchanger can be fitted with an eliminator mat in the discharge air side.
12.3 Dismounting of heat exchanger
Before opening the door of the crossflow plate type heat exchanger, stop
the system. Remove doors, panels,
posts and also the longitudinal profile.
The damper arrangement is inserted
in two rails and can be pulled out after dismounting of electric connection to damper motors.
The heat exchanger is inserted in four
rails. One at the top, one at the bottom
and two in the deck between the upper part and lowest part of the unit.
After dismounting of damper arrangement the heat exchanger block
is accessible and can be pulled out.
On sizes 18/8 - 18/12 the by-pass
duct must be dismounted before the
exchanger block at the back can be
pulled out.
Note: Before re-mounting the exchanger
block and damper arrangement check
packings and sealing strips carefully and
replace them if they are defective.
12.4 Maintenance
The regulating mechanism on the
damper must always be well-greased, for example with graphite grease, where movable metal parts rub
against each other.
Maintain damper motors according
to instructions from supplier.
12.5 Cleaning
ZCN 9/6 to 13/8 for 2 damper motors
ZCN 18/8 to 18/12 for 2 damper motors
ZCN 9/6 to 13/8 for 1 damper motor
Even though the unit is provided
with filters dirt will be accumulated
on damper and heat exchanger block
from time to time. The accumulation
of dirt is concentrated on the first 50
mm in the heat exchanger block
which facilitates the cleaning.
For normal ventilation it is sufficient
to brush the inlet and outlet once a
year. Completion can be done by
means of pressure air or flushing
with water.
In case of more loaded systems (industrial systems) more frequent
cleaning is recommended. Highpressure flushing may be used. Max.
pressure with flat flushing nozzle is
100 bar.
A 90 degree nozzle tube with flat
flushing nozzle is recommended.
ZCN 18/8 to 18/12 for 1 damper motor
18 ZCN
Note! Do not flush with high pressure direct against the plate.
13. Heating and Cooling
Coils
The heating and cooling coils consist
of copper tubes with aluminium fins
housed in a sheet steel frame. The
water is supplied and discharged
through headers with connections,
fig. 13.1, extended through the panel
of the access side.
internal pipe system of the coil, fig.
13.2.
13.2 Cleaning
Fig. 13.2
The supply line must always be connected to the lower connection of the
heating coil.
VM
Max. 5 m
Return
AB
A
B
V
Fig. 13.1
Assembly work close to the heating
and cooling coils must be carried out
with caution to avoid damage to the
fins.
On the discharge pipe the heating
coils are provided with a branch for
mounting of stem bulb sensor in
connection with frost protection.
13.1 Pipe connections
Connection to the pipe system is
made by the pipe contractor.
Heating and cooling coils must always be connected in counter flow
(supply and discharge pipes are
marked with arrows) and so that the
expansibility or own weight of the
pipe system does not load the pipe
connections of the coils.
If the connections of the heating and
cooling coils are designed as threaded pipes they must be secured to
avoid distortion and damage to the
connected to a water trap. See fig.
7.26 page 10.
Min. 60 kPa
diff. pressure
T
T
VO
Extra pump
activated by low
diff. pressure
V
F
V
T
Supply
Boiler water
VM
Max. 5 m
Return
AB
V
Min. 60 kPa
diff. pressure
A
T
T
Mount closed
coupling
Extra pump
activated by low
diff. pressure
V
F
V
T
Supply
District heating water
F
VM
T
VO
V
=
=
=
=
=
Filter (not included)
Solenoid valve
Thermometer
Non-return valve
Shut-off valve
Fig. 13.3 Water circuits
For systems using a boiler to provide
hot water for the heating coil, the
water flow is controlled by means of
a shunt arrangement.
Systems using district heating water
as heat medium are without shunt
arrangements.
The cooling coil is provided with a
drip pan of stainless steel with two
drains, Ø32 mm outside - without
thread, extended through the panel
of the access side. The drains must be
The heating and cooling coils must
be kept clean of dust and foreign material with a view to the hygiene and
heating/cooling efficiency. Cleaning
is effected by means of vacuum
cleaning at the air inlet and, in special cases, by means of compressed
air from the air outlet side or flushing with water.
Cleaning must be performed cautiously as the aluminium fins are
vulnerable to damage.
The cleaning interval depends on the
content of dust in the air.
Cooling coils:
Cooling coils are provided with drip
pan with drain for condensate extended through the access side.
Clean cooling coils by flushing with
water, and drip pan as well as drain
must be kept clean to avoid formation of algae.
In units with high air velocities an
eliminator mat is mounted after the
cooling coil to catch droplets.
The eliminator mat can be pulled out
for cleaning. Remove dust and water
at the bottom of the unit casing immediately after cleaning; preferably
by means of a vacuum cleaner for
dust and water.
Other components:
The components of the pipe system
for regulation and ventilation as well
as other components essential to the
operation of the heating/cooling
coils must be maintained in accordance with the instructions and their
proper function must be checked at
regular intervals.
ZCN
19
13.3 Dismounting of heating
and cooling coils
If, during repair of the heating and
cooling coils, it is necessary to disassemble and later assemble pipe connections, headers with threaded
connections must be retained to
avoid distortion and leakage of the
copper tubes of the coil, fig. 13.2.
When re-mounting a removed cooling coil it is very important to tighten
carefully round the cooling coil in order to avoid small air leakages with
high air velocities causing entrainment of condensate over the edges of
the drain system for the cooling coil.
Cooling coils for direct expansion:
The same maintenance procedures
should be adopted as for water cooling coils, supplemented with the
cooling supplier's maintenance instructions for the pipe system and
associated components.
13.4 Frost protection
Heating and cooling coils must be
protected against frost bursting. This
is obtained by a constant water flow
in the coils and modulating regulation of the water temperature. The
principle is indicated in the diagram
fig. 13.3 with a separate circuit in
connection with a shunt arrangement close to the heating or cooling
coil.
The system should be provided with
automatic controls which in case of
frost will open the valve for water
flow, stop the fan and close the fresh
air damper.
Heating coils are provided with a
branch for stem bulb sensor.
13.5 Electric heating coil
The electric heating coil, fig.13.4, is
composed of tube heating elements
of stainless steel mounted in a steel
frame and provided with a terminal
box with the necessary cable inlets.
20 ZCN
Electrical connection is made in the
terminal box according to the wiring
diagram indicated in the box. Be
careful about connecting the wires to
the heating elements.
Note: Connect the thermostats direct to
the control current of the heating coil
and make sure the tube heating elements
can only operate when the fan is in operation.
the other automatic functions be
neutralized. Before re-starting the
system examine the cause of the
stop, before activating the reset
switch of the thermostat.
In order to avoid unnecessary cutouts of the overheat thermostat during planned off-periods the system
should be provided with automatic
controls for extended fan operation
for the purpose of cooling down the
heating coil.
Note: Minimum air velocity over
standard heating elements is 2 m/s
with a view to superheating of the
heating element, and the thermostats must be connected direct to the
control current of the heating coil.
Fig. 13.4
13.6 Maximum thermostat
The heating coil is provided with an
adjustable maximum thermostat
with a setting range from 30 to
110°C.
After cutting out the maximum thermostat resets automatically at falling
temperatures.
13.7 Overheat thermostat
The heating coil is provided with an
overheat thermostat (fire thermostat) with fixed setting at 110°C and
for manual reset after cutting out.
13.9 Check of thermostats
When starting operation of the heating coil and at least once a year check
the function of the thermostats:
Set the maximum thermostat to
110°C and check that both maximum thermostat and overheat thermostat cut out at the same time.
If either thermostat fails to cut out,
contact a service engineer. After the
check reset the maximum thermostat.
13.10 Check of wire connections
13.8 Automatic control and safety functions
Cut off the power supply of the electric heating coil. Check and adjust
wire connections to the heating element and thermostats at least once a
year.
The automatic system must be so designed that the heating coil can only
operate when the fan is in operation.
If the maximum thermostat cuts out
it is only the voltage to the heating elements that must be cut off. Operation is resumed automatically when
the temperature is reduced by approx. 15°C. If the overheat thermostat cuts out, the fan must stop and
Faint smell of burning at first startup
– mostly due to dust build-up on the
heating elements after a long period
of system stop and will normally disappear quickly. Otherwise, check the
electric heating coil thoroughly and
also the function of the overheat
thermostat.
14. Centrifugal Fans
The fan unit consists of a double inlet
centrifugal fan, motor and V-belt
drive mounted on a frame with antivibration mountings.
The fan unit is mounted in two transverse rails attached to the air handling unit.
The fan outlet opening is connected
to the outlet panel of the unit by
means of a flexible connection which
is fastened to the outlet panel by
means of two cleats fastened by selftapping screws. In units size ZCN 9/
6 to 13/6 pos. A-E the fan unit is
mounted horizontally at the top of
the section and pos. D-F at the bottom. In pos. B and C (fig. 14.1) the fan
unit is mounted vertically against
the outlet panel. The outside frame
of the fan unit is on the access side attached to the rails by means of two
screws. On the opposite side the outside frame of the fan unit is attached
to the rails by means of two clips.
The motor is mounted on a hinged
motor mounting plate which can be
tipped by means of two set screws
for tightening of the belts.
Fig. 14.1
In units size ZCN 13/8 to 18/10 the
fan unit is mounted on the bottom of
the unit, fig 14.2. The outer frame of
the fan unit is attached to the rails in
the access side by means of two
screws.
Opposite to the access side the outer
frame of the fan unit is attached to
the rails by means of two clips.
Fig. 14.2
The motor is mounted on two suspension rails each provided with a
set screw for tightening of the belts.
In units size ZCN 18 / 12-21 / 21, the
fan unit is mounted on the bottom of
the unit (fig. 14.3). On the access side,
the outer frame of the fan unit is attached to the rails by means of two
screws. On the opposite side, the
outer frame of the fan unit is attached to the rails by means of four
clips. The motor is mounted on two
suspension rails, each provided with
a set screw for tightening the belts.
Access for inspection and maintenance of fan and belt drive is obtained by opening the inspection
door on the access side of the unit.
14.2 Electric connections
- are made by authorized personnel
and according to current regulations
in the terminal box of the motor as
shown on the diagram on the inside
of the lid.
Establish a lockable maintenance switch
on the outside of the air handling unit
The motor must be connected with
approved rubber cable and according to current regulations.
Do not lead cable through the inspection doors. Cut hole for cable inlet with locksaw and mount cable inlets as for example shown on fig. 7.24
page 10.
The cable has to be so long (approx.
1.5 x width of unit) that the fan unit
can be pulled all the way out for inspection. After connection of the cable it must be protected so it cannot
touch belt drive and fan.
Fig. 14.3
Note: Handle
Normally the fan is unprotected (without belt guard or wire guard). Do not
mount handle on door but use special
square key to open it.
14.1 Storage
If the storage period exceeds three
months it is recommended to loosen
the belt drive and turn the impeller
regularly by hand.
ZCN
21
14.3 Prior to start of operation
check
– that the transportation fittings
have been removed.
– that the fan impeller is able to rotate freely without touching the
casing.
– that the distance to the inlet cones
is the same in both sides
– that the electric connections meet
current regulations.
– that the belt tension and alignment is correct (see section 14.7).
In case of re-tension, repeat the
procedure
Do not forget to secure the motor.
– that all foreign substances (paper,
tools and the like) have been removed from the air paths
– that the direction of rotation of the
fan complies with the arrowplate
(check by short-time operation).
Starting procedure:
– Start the fan.
– Check that no abnormal noises or
too powerful vibrations occur.
The efficient vibration level must
not exceed 7.1 mm/s (rms) measured on top of the bearing casing
(vertical) and 90 degrees offset
(horizontal).
Note: Check of vibrations has to take
place with the door open for which reason great caution must be exercised in
order not to touch belt drive and impeller.
The belt drive is from the factory
supplied with the belts correctly
tightened.
After half an hour of operation check
that the fan operates normally and
that the belt tension is correct. If that
is not the case, re-tighten the belts.
14.4 Starting procedure
As a precaution the fans must not be
started until the duct system is connected to the unit and the doors of
the unit are closed.
If there is no duct on the pressure
side of the fan, a wire guard must be
mounted.
14.5 General inspection and
maintenance
Prior to opening the door to the fan
section, cut off the power supply to
the fan; set the maintenance switch
in position 0 and lock it.
Open the door by means of the
square key when the fan has slowed
down (min. 2 minutes).
Twice a year check belt drive and
fan, e.g. whether there are abnormal
noises or vibrations.
If necessary, re-tighten the belts
(please see special section).
Vibrations may be due to dust buildup on the impeller and will usually
stop after cleaning. If not, check the
bearings and impeller balance
(please see special section).
14.6 Dismounting of fan unit for
servicing
Prior to opening the door to the fan
section, cut off the power supply to
the fan; set the maintenance switch
in position 0 and lock it.
Open the door by means of the
square key when the fan has slowed
down (min. 2 minutes).
Remove screws on the access side
with which the outer frame of the fan
unit is attached to the rails.
Remove the two screws on the access
side which hold the flexible connection attached on the outlet panel of
the unit.
Pull the fan out of the unit. Be aware
that the flexible connection is totally
clear of the hole in the outlet panel.
14.7 Tensioning and changing
of belts
Power transmission
Installation and maintenance instructions for Optibelt V-belt transmissions
Fig. 14.4
22 ZCN
Do not forget the normal safety
measures
Prior to working on/servicing the
transmission, cut off the power supply
and make sure that the transmission
cannot be switched on again while
work is taking place.
V-belt pulley with TB bushes
Fig. 14.5
Before installation check that all components are undamaged.
Installation (please see page 26 as well)
1. All shiny surfaces should be clean and free of grease.
2. Hang belt pulley over shaft and after that mount bush.
3. Turn belt pulley until all threaded holes are aligned with plain holes in
bush.
4. Oil Allen screws prior to screwing them into holes and tighten so that belt
pulley can still be moved on shaft.
5. For correct centering of bush and belt pulley, it is necessary to tighten Allen screws in several operations, a torque wrench is very useful for this
purpose.
6. Only tighten screws to torque values given for current bush, or it cannot
be removed later on without using force.
TB bushes, Allen screws and tightening torques
Bush No.
Fig. 14.6
Allen wrench
Number of screws
TB 1008, 1108
3
2
Tightening torques
5,7
TB 1210, 1215, 1310,
1610, 1615
5
2
20,0
TB 2012
6
2
31,0
TB 2517
6
2
49,0
TB 3020, 3030
8
2
92,0
TB 3525, 3535
10
3
115,0
TB 4040
12
3
172,0
TB 4545
14
3
195,0
TB 5050
14
3
275,0
Horizontal alignment of shafts
Motor and machine shaft may have to be aligned with a machine spirit level.
Note!
Maximum misalignment 0.5°
Fig. 14.7
Alignment and inspection of pulleys
Check the alignment of the pulleys by means of a guide rail.
Note!
After tightening screws in bushes check alignment and correct until it is in
order.
Fig. 14.8
ZCN
23
Installation of V-belts
Always place V-belts carefully on pulleys, do not force them over the edge
of the pulleys.
V-belts installed by force will often only work for a few weeks and then they
will have to be replaced again!
Fig. 14.9
Fig. 14.10
Tensioning of V-belts
The optimised values are calculated in connection with dimensioning of the
air handling unit and data sheets! The values in the table on page 27 presuppose that the number of belts is correct. If there are too many belts, the shaft
load is increased correspondingly! Align the motor parallel until the correct
belt tension Tmin/Tmax is reached. Rotate the transmission a few times before
checking the Tmin/Tmax values and adjust until the Tmin/Tmax values are
correct. Check the belt tension the first time after 0.5 to 4 hours of operation
under full load.
NB! This check is not necessary for Red Power maintenance free narrow V-belts.
* Optikrik tension gauge, see instructions on pages 25 and 27.
Maximum misalignment
When the belts are correctly tightened it is not certain that the belt pulleys
are aligned. Do not exceed the stated X1/X2 maximum values for misalignment.
Other pulley sizes are interpolated
Fig. 14.11
Pulley diameter
dd1, dd2
Max values
X1, X2
112 mm
0,5 mm
224 mm
1,0 mm
450 mm
2,0 mm
630 mm
3,0 mm
900 mm
4,0 mm
1100 mm
5,0 mm
1400 mm
6,0 mm
1600 mm
7,0 mm
Inspection of belt transmission
Fig. 14.12
Check the belt tension regularly, e. g. every three/six months and tighten as
required.
NB! This check is not necessary for RedPower maintenance free narrow V-belts.
Check the belt pulleys regularly for wear and tear, e. g. once a year and always before installing new belts.
Changing belt pulleys with TB bushes (see page 26 as well).
1. Loosen and remove Allen screws. Now insert Allen screws in the threaded holes intended for dismounting, tighten until the belt pulley can be removed.
2. Remove TB bush and belt pulley.
** section and pulley groove template
24 ZCN
Tension gauges
Pressure surface
Pocket clip
Rubber finger loop
Indicator arm
Belt
Pressure spring
Fig. 14.13
OPTIK
RIK I
N
LBS.
20
00
600
50
100
150
Fig. 14.14
Fig. 14.15
Optikrik 0, I, II, III tension gauges (Fig. 14.13 and 14.14)
This tool is indispensable, if you want optimum life and efficiency of the
belt transmissions. At the same time the shaft load is optimised so that
it corresponds with the values stated by Optibelt. If there are no computer
calculation or data sheet, you can find the maximum belt tension permitted by Optibelt in the table on page 27.
Optikrik 0, I, II, III tension gauges – operating instructions (Fig.
14.15)
1. Turn transmission a few times so that tension is distributed in the entire belt before making measurements.
2. Place tension gauge on top of belt between belt pulleys, press indicator
arm fully onto the scale.
3. Do not touch tension gauge with more than one finger during measuring process.
4. Now activate tension gauge by pressing a finger slowly on to the pressure surface until a click is heard/felt, immediately release pressure after click.
5. Carefully lift tension gauge from belt and read belt tension at exact
point where top surface of indicator arm crosses scale.
6. Adjust belt tension until measured and stated values are identical, do
not forget to turn transmission a few times after each adjustment of
belt tension.
This tension gauge is only used in multi-rib belt drives when the
values exceed what is measurable by means of Optikrik III.
(Fig. 14.16)
1.
2.
3.
4.
5.
Hang test hook (A) on belt between belt pulleys.
Turn second hook (B) over next belt and reset.
Pull handle until right test force on scale (C) is reached.
Now belt tension can be read as deflection depth on scale (D).
Adjust belt tension until measured and stated values are identical.
Fig. 14.16
ZCN
25
V-belt pulleys and TB bush
Installation and dismounting
Installation, see page 22 as well
Bush
TB 1008-3030
Bush
TB 3525-5050
Dismounting, see page 23 as well
Bush
TB 1008-3030
26 ZCN
Bush
TB 3525-5050
Belt tension values
For Optibelt V-belts
Static tension Tmax
(N)
Belt profile
Diameter of smallest pulley
(mm)
Optibelt
SK/VB
wrapped narrow and
classical V-belts
Optibelt
Red Power
maintenance free
narrow V-belts
Installation
new belts
Remounting
same belt
Installation
new belts
Check
Optibelt
Super TX
moulded cogged raw
edge V-belts
Installation
new belts
Check
≤71
> 71 ≤90
> 90 ≤125
250
300
400
200
250
300
200
250
350
150
200
250
250
300
400
200
250
300
SPA
XPA
≤100
>100 ≤140
>140 ≤200
>200 *
400
500
600
300
400
450
350
400
500
250
300
400
400
500
600
300
400
450
SPB; 5V/15N;
XPB; 5VX/15NX
≤160
>160 ≤224
>224 ≤355
>355 *
700
850
1000
550
650
800
650
700
900
500
550
700
700
850
1000
550
650
800
SPC
XPC
≤250
>250 ≤355
>355 ≤560
>560 *
1400
1600
1900
1100
1200
1500
1000
1400
1800
800
1100
1400
1400
1600
1900
1100
1200
1500
≤50
> 50 ≤71
> 71 ≤100
>100 *
–
–
Z/10;
ZX/X10
90
120
140
70
90
110
120
140
160
90
110
130
≤80
> 80 ≤100
>100 ≤132
>132 *
–
–
A/13;
AX/X13
150
200
300
110
150
250
200
250
400
150
200
300
≤125
>125 ≤160
>160 ≤200
>200 *
–
–
B/17;
BX/X17
300
400
500
250
300
400
450
500
600
350
400
450
≤200
>200 ≤250
>250 ≤355
>355 *
–
–
C/22;
CX/X22
700
800
900
500
600
700
800
900
1000
600
700
800
SPZ; 3V/9V
XPZ; 3VX/9NX
>125 *
Optikrik 0
Area:
70 - 150 N
The table does not replace a computer calculation or data sheet! The values
can be used when no computer calculation or data sheet with optimised values are available (see page 24), they are based on maximum power transmission and also state maximum shaft load.
Optikrik I
Area:
150 - 600 N
Range of application:
Optikrik II
Area:
500 - 1400 N
Narrow V-belts
Belt speed v = 5 to 42 m/s
Optikrik III
Area:
1300 - 3100 N
Classical V-belts
Belt speed v = 5 to 30 m/s
* belt tension values must be computer calculated
Tension gauges:
ZCN
27
14.8 Fan bearings
Unit size
ZCN 9/6
ZCN 13/6
ZCN 13/8
ZCN 18/8
ZCN 18/10
ZCN 18/12
ZCN 18/12
ZCN 18/15
ZCN 18/15
ZCN 18/18
ZCN 18/18
ZCN 21/21
ZCN 21/21
Fan
Max
rpm.
Max
kW
C2LF-225
C2LB-225
C2LF-280
C2LB-280
C2LF-355
C2LB-355
C2HB-355
C2LF-400
C2LB-400
C2HB-400
C2LF-500
C2LB-500
C2HB-500
C2LF-560-R
C2LB-560-R
C2HB-560-R
C2LF-630-R
C2LB-630-R
C2HB-630-R
C2LF-710-R
C2LB-710-R
C2HB-710-R
C2LF-800-R
C2LB-800-R
C2HB-800-R
C2LF-900-R
C2LB-900-R
C2HB-900-R
3400
4500
2700
4200
1900
3300
4000
1700
2800
3500
1300
2100
2800
1200
2000
2500
1000
1600
2100
850
1450
1900
750
1350
1660
650
1200
1480
5,0
1,7
8,0
3,5
10,0
6,0
12,0
11,0
7,0
12,0
15,0
10,0
23,0
15,0
13,0
28,0
18,5
14,0
32,0
22,0
18,0
44,0
37,0
25,3
48,3
48,0
33,7
63,0
BearShaft
BearWeight ing
∅
ing unit
kg manu(mm)
type
facture
20h7
20h7
25h7
25h7
30h7
30h7
30h7
30h7
30h7
30h7
35h7
35h7
35h7
40h7
40h7
40h7
45h7
45h7
45h7
45h7
45h7
45h7
55h7
55h7
60h7
50h7
60h7
65h7
11,4
12,5
18,5
18,0
30,0
33,0
33,0
38,0
43,0
44,0
57,0
64,0
66,0
93,0
102,0
118,0
114,0
134,0
150,0
154,0
168,0
169,0
260,0
267,0
287,0
318,0
343,0
362,0
C2LF = Forward curved blades
C2LB = Backward curved blades
C2HB = Backward curved blades, reinforced design
-R = Galvanized reinforced frame
14.9 Change of bearings
Dismount the fan unit as described
previously. Slacken the V-belts, remove them and pull off the belt pulley from the fan shaft. Support the
fan shaft on the side where the bearing is to be replaced.
Ask for detailed instructions, if necessary.
28 ZCN
SKF
SKF
SKF
SKF
SKF
SKF
SKF
SKF
SKF
SKF
SKF
SKF
SKF
SKF
SKF
SKF
SKF
SKF
SKF
SKF
SKF
SKF
INA
INA
SKF
INA
INA
SKF
Casing
type
Bearing type
YET204
YET204
YET205
YET205
YET206
YET206
6207-2RS1K
YET206
YET206
6207-2RS1K
YET207
YET207
6208-2RS1K
YET 208
6209-2RS1K
SNL 509 N
22209 CCK/C3W33
YET 209
6210-2RS1K
SNL 510
22210 CCK/C3W33
YET 209
6210-2RS1K
SNL 510
22210 CCK/C3W33
PASE 55 ASE 11 L
GRAE 55 NPPB
PASE 55 ASE 11 L
GRAE 55 NPPB
SNL 513-611 22213 CCK/C3W33
PASE 60 ASE 12
GRAE 60 NPPB
PASE 60 ASE 12
GRAE 60 NPPB
SNL 515-612 22215 EK/C3
Guide ring Clamping
Seal
Seating
ring
RIS204
RIS204
RIS205
RIS205
RIS206
RIS206
H207
RIS206
RIS206
H207
RIS207
RIS207
H208
RIS208
2FRB3.5/85
H209
H309vz425 TSN 509 G
2FRB9/90
H210
H310vz425 TSN 510 G
2FRB9/90
H210
H310vz425 TSN 510 G
2FRB10/120
H313
TSN 513 G
2FRB12,5/130 H315
TSN 515 G
Greasing
(grease)
Greased for life
Greased for life
Greased for life
Greased for life
Greased for life
Greased for life
Greased for life
Greased for life
Greased for life
Greased for life
Greased for life
Greased for life
Greased for life
Greased for life
Greased for life
10 g / 4380 h
Greased for life
Greased for life
11 g / 4380 h
Greased for life
Greased for life
11 g / 4380 h
12 g / 4380 h
12 g / 4380 h
18 g / 4380 h
14 g / 4380 h
14 g / 4380 h
20 g / 4380 h
15. Axial Flow Fans
ACG 800-1120
The fan unit consists of a Novax axial
flow fan type ACG mounted on antivibration mountings on rails which
can be pulled out fig. 15.6. The fan
outlet opening is connected to the
discharge panel of the unit by means
of a flexible connection which is fastened by means of suspension rails,
fig. 15.7.
Fig. 15.3
Fig. 15.1
The outlet panel is on the outside
provided with a spigot intended for
mounting of round ducts, fig. 15.4.
The outlet opening on the fan is led
into the panel and close to the spigot,
fig. 15.5.
Fig. 15.6
Fig. 15.2
ACG 400-710
The fan unit consists of a special Novax axial flow fan type ACG mounted on anti-vibration mountings, fig.
15.1 and 15.2.
The outlet opening of the fan is
smooth and extended through a
sheet with a rubber packing as seal,
fig. 15.3.
The whole fan unit is mounted on a
broad rail and is fastened to it by
means of four fittings and to the outlet panel by means of four fittings,
fig. 15.1.
Fig. 15.4
Fig. 15.7
Fig. 15.5
Access for inspection and maintenance of the fan is obtained by opening the inspection door on the access
side of the unit.
The fan unit is mounted at the bottom of the unit and is attached to the
transverse rails in the access side by
means of screws. Opposite to the access side the fan unit is attached to
the rails by means of clips.
Access for inspection and maintenance of the fan is obtained by opening the inspection door on the access
side of the unit.
ZCN
29
15.1 Storage
If the storage period exceeds three
months it is recommended to turn
the impeller regularly by hand.
15.2 Electric connections
- are made by authorized personnel
and according to current regulations
in the motor terminal box as shown
on the diagram on the inside of the
lid.
Establish a lockable maintenance switch
on the outside of the air handling unit.
The motor must be connected with
approved rubber cable and according to current regulations. Do not
lead cable through the inspection
doors. Cut hole for cable inlet with
locksaw and mount cable inlets as
for example shown on fig. 7.24 page
10.
The cable has to be so long (approx.
1.5 x unit width) that the fan unit can
be pulled all the way out for inspection. After connection of the cable it
must be protected so it cannot touch
the fan.
– that all foreign substances (paper,
tools etc.) have been removed
from the air paths.
– that the direction of rotation of the
fan complies with the arrowplate
(check by short-time operation).
15.4 Starting procedure
Start the fan.
Check that the vibration level is normal. The vibration level at the fan
operating speed should not exceed 7
mm/sec., measured in 2 points, 90°
offset outside on the fan casing and
also at the free shaft end of the motor.
If the vibration level exceeds 11 mm/
s the fan must be balanced.
After half an hour of operation check
that the fan operates normally.
15.5 General inspection and
maintenance
Before opening the door to the fan
section, cut off the power supply to
the fan and set the maintenance
switch in position 0.
Open the door when the fan has
slowed down (min. 2 minutes).
ACG 400-710
15.3 Prior to start of operation
check
– that the two transportation fittings have been removed, both on
the access side and opposite the
access side
– that the impeller is able to rotate
freely without touching the casing.
– that electric connections meet current regulations and that the motor starter is adjusted to the motor
rated current
– that the wire guard is mounted on
the suction side of the fan.
– that duct is mounted on the pressure side of the fan.
30 ZCN
Twice a year check the fan operation,
including whether abnormal noises
and vibrations occur.
Vibrations occurring during operation will normally be due to accumulations of dust or dirt on hubs and
blades, and will generally stop after
cleaning. If not, expert assistance
should be called in immediately, as
continued vibrations will shorten
the life of both blades and motor
bearings.
15.6 Dismounting of fan unit for
servicing and cleaning
Before opening the door to the fan
section, cut off the power supply to
the fan; set the maintenance switch
in position 0 and lock it.
Open the door when the fan has
slowed down (min. 2 minutes).
ACG 400-710
Remove the four fittings on the access side which hold the fan unit attached to the outlet panel and rail,
fig. 15.1 and 15.3. Pull and turn the
fan unit backward (away from the
outlet panel) until the fan spigot is
clear of the panel. The fan unit turns
round the innermost fittings of the
rail. Pull the fan unit clear of the innermost fittings of the rail by pulling
towards the door. Now the fan unit
is free and can be pulled out of the
unit.
ACG 800-1120
Remove panel and doorpost.
Remove the screws on the access
side by means of which the fan unit
is attached to the rails.
Release the rails by which the flexible connection is attached to the outlet panel.
Pull the fan out of the unit. Be aware
that the flexible connection is totally
clear of the spigot on the outlet panel.
15.7 Dismounting of motor
Support the fan casing and dismount the anti-vibration mountings
and down-stream guide vane arrangement, fig. 15.9, items 13, 10, 11
and 14, on the outlet side of the fan.
Now lift the fan off the suspension
and remove the centre screw, item
09, and centre disc, item 08, from the
impeller
Dismount the impeller by means of a
puller fastened in the two threaded
holes of the hub boss, item 12.
Dismount the motor by loosening
the screws in the motor shell, items
05 and 06. Now the motor, item 01,
and the motor flange, item 02, can be
removed.
In dismounting and disassembling
the fan be careful not to expose the
individual parts to shocks etc. likely
to damage the motor bearings or
other fan parts.
Fig. 15.9
15.8 Mounting of motor
15.9 Blade pitch adjustment
After servicing remount the motor.
See that the motor flange, item 02, is
correctly located and that the motor
shaft is located in the centre of the
fan casing, before tightening the
bolts, item 06.
Mount the impeller, item 07, on the
motor shaft by means of a pull-on
tool fastened in the threaded hole of
the motor shaft. Fix the impeller hub
to rest against the motor shaft collar.
Check that the blade clearance is the
same throughout the circumference
of the casing. If this is not the case,
adjust the motor location in the suspension arrangement. After that
mount the centre screw, item 09, and
centre disc, item 08.
Mount the fan on the down-stream
guide vane arrangement, item 13,
and anti-vibration mountings (replace lock washers and lock nuts
during the fan assembly).
Finally, remount the fan unit in the
fan casing.
To start the fan, follow the procedure
described in sections 15.3 and 15.4.
The blade pitch has been adjusted in
the factory with a special tool (fixture) to deliver the performance required by the customer/order on delivery.
If a change of the fan performance is
required it is possible to change the
blade pitch. It requires knowledge of
the motor load and max. permissible
blade pitch on the graph in relation
to the motor rating (in case of blade
pitch increase).
Contact Novenco before any such
adjustment of the blade pitch. Novenco can supply special tools for
blade pitch adjustment and instructions for impeller balancing.
The brochure “Blade Angle Tool” is
available on request.
ZCN
31
15.10 Air quantity meter
1. Calibration of manometer
The air quantity meter consists of a
pressure probe in the fan inlet and a
manometer mounted outside on the
fan section together with two measuring outlets. One of the measuring
outlets is connected to the pressure
probe and the other to the interior of
the fan.
Make sure that all the manometric
liquid in the U-shaped short-circuit
hose (3) has run down into the measuring vessel (2). After that cut the
hose as shown on fig. 15.10.
Loosen the screws (5 and 6) and calibrate the meter carefully by turning
the measuring vessel (2) in the base
plate (1) until the indicator (4) points
at 0 on the firm pressure scale (A) as
shown on fig. 15.11. Then tighten the
screws (5 and 6). Calibration of the 0position should take place approx. at
the temperature at which the meter
is to be used. To avoid that manometric liquid is blown out of the measuring vessel (2) the length of the partition wall (7) is adapted so that air
passes through if the pressure exceeds the pressure range of the meter. In order to avoid a too voilent
flow the blue reducing nipples (10)
sent with the manometer are mounted in the hoses (fig. 15.12) before
those are mounted on the pressure
taps. Connect the hose from the pressure probe to (-) and the hose from
the fan section to (+) on the manometer (fig. 15.11).
Fig. 15.10
32 ZCN
Fan type
ConACG
stant K
Calibration values
pt, Pa
q, m3/s
400/160
8,45
300
2,05
400/230
10,02
200
1,41
500/160
5,32
200
2,66
500/230
5,62
200
2,52
500/280
6,27
300
2,76
500/330
7,48
400
2,67
560/230
4,33
400
4,00
560/280
4,65
300
3,73
560/330
5,22
400
3,83
560/380
6,22
400
3,22
630/230
3,36
400
5,95
630/280
3,50
400
5,72
630/330
3,77
400
5,30
4,74
630/380
4,22
400
710/230
2,64
400
7,59
710/280
2,67
400
7,48
2. Setting of the air quantity
scale
710/330
2,80
400
7,15
710/380
3,01
400
6,64
The pressure probe is calibrated and
the air quantity is calculated on the
basis of the following formula:
800/230
2,09
400
9,56
800/280
2,08
400
9,62
800/330
2,13
400
9,41
1
q = --- p t
k
800/380
2,22
400
8,99
900/280
1,64
200
8,61
900/330
1,65
200
8,58
900/380
1,69
200
8,37
900/403
1,72
200
8,23
900/578
2,22
400
8,99
7,46
Fig. 15.11
Fig. 15.12
scale. After that read the air quantity
direct in m3/s on the blue scale.
Example:
Climaster ZCN 18/8 with fan type
560/280:
Pt = 300 Pa, q = 3.73 m3/s.
Turn the blue scale (A) until q = 3.73
m3/ s is opposite pt = 300 Pa. The
manometer is now set and the green
marking which indicates ± 15% air
quantity is turned until 3.73 m3/s is
in the middle of the area
The calibration values pt and q can
be obtained from the table below, set
the manometer as described: By
means of a sharp object turn the air
quantity scale (A) - fig. 15.12 through the slot in the top righthand corner of the manometer until
the air quantity q on the blue scale is
opposite the pressure pt on the firm
1000/380
1,34
100
1000/403
1,35
100
7,39
1000/578
1,61
200
8,79
1120/403
1,06
100
9,41
1120/578
1,18
200
8,46
16. Plug Fans
The plug fan is a direct driven, single-inlet centrifugal fan with backward-curved blades mounted without fan housing.
The fan unit is mounted in a fan suspension configuration with vibration dampers and on two transverse
rails fixed to the bottom of the chamber. The unit consists of a fan wheel
mounted directly on the drive shaft
of a single-speed motor. The motor is
a standard base motor with connection in terminal box.
shown on the diagram on the inside
of the lid.
Establish a lockable maintenance switch
on the outside of the air handling unit.
The motor must be connected with
approved rubber cable and according to current regulations.
Do not lead the cable through the inspection doors. Cut hole for cable inlet with locksaw and mount cable inlets as for example shown on fig. 7.24
page 10.
The cable has to be long enough (approx. 1.5 x unit width) for the fan
unit to be pulled all the way out for
inspection. After connection of the
cable it must be protected so it cannot touch the fan.
16.3 Prior to start of operation
check
Figure 16.1
On the suction side the inlet funnel is
found mounted against the suction
chamber. A flexible rubber seal isolates the fan thus preventing vibrations from spreading to the rest of
the unit.
Observe: Handles
Normally the fan is unprotected and
handles must not be fitted on the door.
The special square key is used for opening the door.
16.1 Storage
If the storage period exceeds three
months it is recommended to turn
the impeller regularly by hand.
16.2 Electric connections
These are made by authorised personnel and according to current regulations in the motor terminal box as
– that the two transportation fittings are removed.
– that the impeller can rotate freely
without touching the casing.
– that electric connections meet current regulations.
– that the motor is fixed in position
– that all foreign substances (paper,
tools etc.) are removed from the
air paths.
– that the direction of rotation of the
fan complies with the arrowplate
(check by short-time operation).
points, 90° offset outside on the inlet funnel and on the end of the
motor furthest away from the impeller.
If the vibration level exceeds
11 mm/s the fan must be balanced.
After half an hour of operation
check that the fan operates normally.
Observe: Control of vibrations is necessarily done with an open door. Hence,
great caution must be taken in order not
to touch the impeller.
16.5 General inspection and
maintenance
Before opening the door to the fan
section, cut off the power supply to
the fan and set the maintenance
switch in position 0.
The door is opened with the square
key, when the fan has slowed down
(min. 2 minutes).
Twice a year check the fan operation,
including whether abnormal noises
and vibrations occur.
Vibrations occurring during operation is normally due to accumulations of dust on the impeller and will
generally disappear after cleaning. If
not, the bearings and balance of the
impeller must be examined. See special section for details.
16.4 Starting procedure
Avoid starting the fans for safety reasons, before the duct system is fitted
and connected to the unit. The unit
doors must be closed.
If no duct is fitted on the pressure
side of the fan, then a guard net must
be installed.
Remaining starting procedure:
– Start the fan.
– Check that the vibration level is
normal. The level should not exceed 7 mm/sec., measured in 2
16.6 Dismounting of fan unit
for servicing
Before opening the door to the fan
section, cut off the power supply to
the fan; set the maintenance switch
in position 0 and lock it.
Open the door with the square key
when the fan has slowed down (min.
2 minutes).
Remove the screws on the access
side holding the external frame of
the fan unit to the rails.
ZCN
33
There are two screws in front of and
two screws behind the motor.
When the screws are removed the
fan can be pulled out. Avoid tearing
the rubber seal by inserting a sheet
steel plate between the seal and the
wall before pulling the fan past the
hole.
Fan sizes 710 - 800 are fitted with
flexible connections instead of rubber seals, which are attached to the
outlet panel. In units with these fan
sizes there are two screws on the access side holding the flexible connection to the outlet panel. When pulling the fan out be aware that the flexible connection is completely clear of
the hole in the outlet panel.
16.7 Air quantity meter
The air quantity meter is optional
and consists of a pressure probe and
manometer. The probe is fitted in the
fan inlet and the manometer is
mounted on the outside of the air
handling unit together with two
measuring outlets. One of the measuring outlets is connected to the
pressure probe and the other to the
interior of the fan (suction chamber).
Two pressure tubes connect the
measure outlets to the manometer.
The pressure tube on top of the manometer is cut in the middle. The end
17. Motors for fans
The fan motors are mounted before
leaving the factory but normally not
electrically connected.
Electric connections
– are made by authorized personnel
and according to current regulations
in the motor terminal box as shown
on the diagram on the inside of the
lid.
34 ZCN
pieces are pushed onto the - and +
nipples (1).
1
+
-
+
ZCN
size
9/6
13/6
13/8
18/8
4
5
2
18/10
3
18/12
Fan size
CCL
q
Constant k [m3/s]
280
48.08
0.66
315
37.88
0.83
315
37.88
0.83
400
23.38
1.35
400
23.38
1.35
500
14.29
2.21
500
14.29
2.21
560
11.68
2.71
560
11.68
2.71
710
7.35
4.30
710
7.35
4.30
800
5.81
5.44
Air quantities at 1000 Pa
Figure 16.2
1. Calibration of manometer
This is done when the air handling
unit has been turned off.
The measuring pipe (2) is calibrated
by displacing the pipe until the 0-position on the printed scale (3) is
aligned with the underside of the
ball in the pipe.
2. Setting of the air quantity
scale
The air handling unit is started and
set to deliver a suitable pressure that
is easily read on the printed scale, f.x.
1000 Pa.
A lockable maintenance switch must
be established on the outside of the
air handling unit.
The motor must be connected by
means of an approved rubber cable
and according to current regulations.
Do not lead cable through the
inspection doors.
The cable must be so long (approx.
1.5 x unit width) that the fan unit can
be pulled all the way out for inspection. After connection of the cable it
The air quantity is calculated with
the formula.
1
--- p = q
k t
The yellow air quantity scale (4) is
set by loosening the centre screw (5)
and turning the scale until the air
quantity and differential pressure
match each other.
Complete the setting by turning the
transparent plastic disk until the
middle of the green field corresponds with the set pressure-air
quantity ratio. Tighten the centre
screw carefully.
must be protected so that it cannot
touch the belt drive or fan.
For further information about connection and maintenance please see
`Installation and Maintenance Instructions for Motors', which is attached to the motor or included in the
packing for spare parts.
18. Silencer
The silencer baffles are housed in the
unit casing and attached by rails at
the top and bottom. The baffles consist of 200 mm mineral wool coated
with black glass splinter on both
sides and mounted in a sheet casing.
18.1 Cleaning
Clean the silencer by means of a vacuum cleaner. If it is not possible to
vacuum clean the baffles in the slots,
remove the side panel (see page 5)
and take the baffles out for vacuum
cleaning.
The baffles are located on angle sections at the bottom of the section.
The baffles are not fastened and can
be pulled out after the side panel has
been removed.
Important: Be careful not to damage the
surface of the baffles, black glass splinter,
during cleaning.
The distance between the baffles is
ensured by means of the attached
distance fittings, one in each corner.
In ZCN 13/6 and ZCN 13/8 the
thickness of the baffle at the back is
100 mm and it has no distance fittings.
This baffle should be placed at the
back in order to ensure a low noise
level, i.e. opposite the access side,
when assembling the silencer.
19. Humidifier
The humidifier is the wash type humidifier composed of a frame construction with a humidifier cassette
of Glasdek and water reservoir.
Detailed instructions are enclosed in
the humidifier or available on request as PDF-document:
FabGB_cp.pdf.
20. Declaration of Conformity
Directives:
– EC Machinery Directive 2006/
42/EC
– EMC Directive 2004/108/EC
– LVD 2006/95/EC
In conformity with the EC Machinery Directive 2006/42/EC, Supplement II, A
Manufacturer: Novenco A/S
Address:
Industrivej 22
4700 Naestved
Denmark
hereby declares that
Novenco air handling units type
ZCN 9/6 – 21/21
a) meet the requirements of the directives mentioned below provided that the products are installed in conformity with the enclosed instructions. If the products are changed, this declaration
will no longer apply.
b) are made in conformity with the
following harmonized standards:
– EN ISO 12100-1, EN ISO 12100-2,
EN ISO 12100-2/A1,
EN ISO 13857
– EN 60204-1
It is a condition that Novenco’s installation instructions have been followed.
Naestved, 01.12.2010
Steen Hansen
R&D manager
Novenco A/S
ZCN
35
MU 14446 1210
Novenco develops and manufactures
ventilation and fire fighting systems that
are marketed and distributed world-wide
through subsidiaries and agents.
The company was founded in Denmark
1947 and has become one of the
world-leading suppliers.
Novenco symbolises quality and environmentally friendly products. The company
is certified according to ISO 9001 and
ISO 14001.
The headquarters of Novenco is located
in Naestved, Denmark.
Novenco, Hi-Pres and XFlow are
registered trademarks of Novenco.
Read more about Novenco on the
Internet.
Novenco A/S · Industrivej 22 · 4700 Naestved · Denmark · Tel. +45 70 12 42 22 · Fax +45 55 75 65 50
www.novenco-group.com