42GW
60 Hz
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INST ALLATION MANU AL
ENGLISH
GB - 1
42 GW
“Hydronic Global Cassette” Fan Coil Units
Contents
Page
Dimensions and weights........................................................................ 2
Technical data........................................................................................ 3
General information............................................................................... 4
Avoid ...................................................................................................... 5
Installation ............................................................................................. 6/8
Water connections................................................................................. 8
Motorized valve and control................................................................... 9/11
Electrical connections............................................................................ 11/12
Wiring diagram....................................................................................... 13
Fresh air renewal and conditioned air supply to adjacent room ............ 14/15
Maintenance .......................................................................................... 16
Models
Power supply
C = 2-pipe
42GWC004-3
42GWC008-3
42GWC010-3
230V ~ 60Hz
42GWC012-3
42GWC016-3
42GWC020-3
42 GW
GB - 2
Dimensions and weights
813
595
960
298
120
225
280
Ø
1
5
0
440
88
160
825
112
70
125
825
120
ø150
298
237
52
100
50
160
110
90
155
575
158
Ø
7
0
720
550
515
Ø 25
Ø
2
5
620
Ø 100
150
575
42GW 004 008 010 012 016 020
Unit 17.51919363838
Frame/Grille assembly 333555
kg
42GW
012 - 016 - 020
42GW
004 - 008 - 010
42 GW
GB - 3
ENGLISH
Table I:
Nominal data
• The unit power cable must be type H07 RN-F.
Note: 230V ~ 60 Hz.
T echnical data
Description Q.ty Use
Installation instructions 1 Unit installation
Fresh air intake baffle 1 Air renewal
Table III:
Material supplied
Table V:
Accessories
Table II:
Wire section of
connecting cable mm
2
POWER INPUT
Models Cooling Heating
WA WA
42GWC004-3 60 0.26 50 0.21
42GWC008-3 65 0.28 55 0.24
42GWC010-3 95 0.41 85 0.37
42GWC012-3 108 0.47 98 0.42
42GWC016-3 140 0.60 130 0.56
42GWC020-3 185 0.80 175 0.76
Models L/R N/C
from 004 to 020 1.0 1.0
Description Size / Code
004-008-010 012-016-020
2-pipe valve 42GW9003 42GW9007
Primary air 42GW9005 42GW9006
Air discharge closing 40GK-900---003-40 40GK-900---013-40
Active carbon filter 40GK-900---002-40 40GK-900---012-40
Electrostatic filter 40GK-900---001-40 40GK-900---011-40
Drain pan 42GW9009 42GW9010
Water discharge pump 40GKX9001
Control 42GW9014
Control 42GW9015
Control 42GW9016
Control 42GW9017
Control CRC 33DFS-RM
Auxiliary board 42GW9013
T able IV : Operating limits
Water circuit Water- side maximum pressure Minimum entering water temperature: + 4°C
1400 kPa (142 m w.c.) Maximum entering water temperature: + 80°C
Ambient air Minimum temperature: 5°C
(1)
Maximum temperature 32°C
Power supply
Nominal single phase voltage 230V ~ 60 Hz Special Export Market
Operating voltage limits min. 187V - max. 253V
Note:
(1)
If the ambient temperature can go down to 0°C, it is advisable to empty the water circuit to avoid damage caused by ice (see
paragraph on water connections).
42 GW
GB - 4
General Information
Unit installation
Read this instruction manual thoroughly before starting
installation.
• This unit complies with the low-voltage (EEC/73/23) and
electromagnetic compatibility (EEC/ 89/336) directives.
• The installation should be carried out by a qualified installer.
• Follow all current national safety code requirements.
In particular ensure that a properly sized and connected ground
wire is in place.
• Check that the voltage and frequency of the mains power supply
are as required for the unit to be installed; the available power
source must be adeguate to operate all other appliances
connected to the same line.
Also ensure that national safety code requirements have been
followed for the main supply circuit.
• Where necessary, use field-supplied 25 mm I.D. PVC pipe of
appropriate length and with the correct thermal insulation for the
condensate drain extension.
• After installation thoroughly test system operation and explain all
system functions to the owner.
• Use this unit only for factory approved applications: the unit
cannot be used in laundry or steam pressing premises.
WARNING:
Disconnect the mains power supply switch before servicing
the system or handling any internal parts of the unit.
• The manufacturer declines any liability for damage resulting
from modifications or errors in the electrical or water
connections.
Failure to observe the installation instructions, or use of the
unit under conditions other than those indicated in Table
"Operating limits" of the unit installation manual, will
immediately invalidate the unit warranty.
• Failure to observe electric safety codes may cause a fire hazard in
the event of short circuits.
• Inspect equipment for damage during transport. In case of
damage file an immediate claim with the shipping company.
Do not install or use damaged units.
• In case of malfunction turn the unit off, disconnect the mains
power supply and contact a qualified service engineer.
• Maintenance must only be carried out by qualified personnel.
• All of the manufacturing and packaging materials used for
this appliance are biodegradable and recyclable.
• Dispose of the packaging material in accordance with local
requiremements.
Choosing the installation site
Positions to avoid:
• Exposure to direct sunlight.
• Areas close to heat sources.
• On damp walls or in positions that may be exposed to water
hazard.
• Where curtains or furniture may obstruct free air circulation.
Recommendations:
• Choose an area free from obstructions which may cause uneven
air distribution and/or return.
• Consider using an area where installation is easy.
• Choose a position that allows for the clearances required.
• Look for a position in the room which ensures the best possible air
distribution.
• Install unit in a position where condensate can easily be piped to an
appropriate drain.
GB - 5
42 GW
ENGLISH
Avoid...
MAX 3 m
MAX 3 m
MAX. 200 mm
... any obstruction of the unit air intake or supply grilles.
... exposure to direct sunshine, when the unit is operating in the
cooling mode; always use shutters or shades.
... positions too close to heating sources which may damage the unit.
... ascending sections of condensate drain piping.
These may only be used near the unit with a maximum height
difference of 200 mm from the top of the unit.
... flattening or kinking the refrigerant pipes or condensate pipes.
... installation in areas with high frequency waves. ... only partial insulation of the piping.
Non-level installation which will cause condensate dripping.
... exposure to oil vapours.
... connecting condensate piping to sewage system drain without
appropriate trap. Trap height must be calculated according to the
unit discharge head in order to allow sufficient and continuous
water evacuation.
... horizontal sections or curves of condensate drain piping with less
than 2% slope.
...slack on electrical connections.
42 GW
GB - 6
Installation
B
A
Prior to installation
It is advisable to place the unit as close as possible to the installation site
before removing it from the packaging. The grille panel and the control
are separately packed for maximum protection.
IMPORTANT:
Do not lift the unit by the condensate drain discharge pipe;
hold it by its four corners only.
Unit installation will be facilitated using a stacker.
Mark the position of the hangers, connection lines and condensate
drain pipe, power supply cables and remote control cable (see
dimensions); the cardboard template (supplied with the kit) may
be of assistance for this operation. Depending on the type of
ceiling the hangers can be fixed as shown in the drawing.
Installation
If plaster board ceiling panels are installed the maximum
dimensions of the unit housing must not exceed 660 x 660 mm
(mod. 004 - 008 - 010) and 900 x 900 mm (mod. 012 - 016 - 020).
In rooms with high humidity, brackets should be insulated by self
adhesive insulation supplied.
Max. 2 louvres closed
Warning: To close one or two air outlets use the special kit
• Install the unit as centrally as possible in the room, the air flow
direction can be controlled by manually regulating the louvres
position, according to the operating mode (cooling or heating): this
will ensure optimum distribution of the air in the room.
• During cooling mode operation the best position for the deflecting
louvres is one which allows air diffusion close to the ceiling
(Coanda effect). In heating mode, the louvres should be
positioned so that the air is directed towards the floor, in order to
prevent layers of hot air forming in the upper part of the room.
• In order to allow easy and rapid installation and maintenance,
make sure that in the selected position it is possible to remove
the ceiling panels or, if the ceiling is constructed of masonry,
that access to the unit is guaranteed.
ATTENTION:
Only restrict the air outlets as indicated in the drawing.
Washer
Threaded hangers
Washer
Nut
Nut
Nut
Wooden frame
Threaded hangers
Washers
Nut
Once the threaded hangers have been positioned, do not tighten
the nuts, and insert the washers as shown in the drawing.
A Cooling only: louvre position for
correct air flow.
B Heating: louvre position for
correct air flow.
GB - 7
42 GW
ENGLISH
Installation
Threaded hangers
"T" bar
(to be removed)
False ceiling
Spirit level
Suspension brackets
mm
• To ensure correct condensate water flow, the drain pipe should
have a gradient of 2% without obstructions. Furthermore an
odour trap of at least 50 mm depth should be made to prevent
unpleasant odours from reaching the room.
• Condensate may be discharged at a maximum height of 200 mm
above the unit, as long as the ascending tube is vertical and
aligned with the drainage flange.
• If it is necessary to discharge the condensate from a level
above 200 mm, install an auxiliary water discharge pump and
float valve.
A float valve is recommended to stop the flow switch if there is
a fault at the auxiliary pump.
• The condensate pipe must be insulated with a condensationproof material such as polyurethane, propylene or neoprene of
5 to 10 mm thickness.
• If more than one unit is installed in the room, the drain system can
be made as shown in the drawing.
Align and level the unit by adjusting the nuts and locknuts on
the threaded hangers, maintaining a distance of 25 -30 mm
between the sheet metal body and the underside of the false
ceiling.
Reposition the "T" bar and align the unit in relation to the bar by
tightening the nuts and locknuts.
After connection of the condensate drain line and the refrigerant
lines, carry out a final check to make sure that the unit is level.
Carefully lift the unit (without the frame) using the four
suspension brackets (or the four corners), inserting it into the
false ceiling.
If the "T" bar cannot be removed the unit may need to be tilted
(this operation may only be carried out with false ceilings with a
minimum height of 300 mm).
First position the connection lines , as described in the chapter
"Water connections".
Remove the "T" bar in order to facilitate installation operations.
Condensate drain pipe
50
2%
42 GW
GB - 8
A B
Installation
Installation of grille/frame assembly
Carefully unpack the assembly and check for damage sustained in
transit. Attach the assemb ly to the unit b y using the two hooks .
Use the screws supplied to fix the frame in position.
Frame pre-hooking support
Safety belt
Frame fixing screw
A. Gasket "A"
B. Gasket "B"
Checking
Before unit operation pour a quantity of water into the external
auxiliary drain pan. Verify that the water flows into the internal
condensate drain pan and that the pump regularly drains the
liquid.
Otherwise check the pipe slope and look for possible
obstructions. Water connections are fixed to the unit body to
avoid damage when pipes are connected; it is advisable to
tighten the connection with a spanner.
Water connections are fixed to the unit body to avoid damage
when pipes are connected; it is advisable to tighten the
connection with a spanner.
The upper coil connection is supplied with an air purge valve,
the lower connection with a water purge valve, suitable for a
10 mm wrench or screw-driver.
(The coil is only partially drainable; it it is advisable to
blow air into the coil for complete drainage).
It is necessary, when the installation is made, to insulate the
valve and the connection pipes with anti-condensate material
of polyethylene type or expanded neoprene.
Ensure that the frame is not distorted by excessive tightening,
that it is aligned with the false ceiling and above all that there is
a seal between the air inlet and outlet.
In the drawing gasket "A" prevents return air from mixing with
the supply air and gasket "B" prevents the supply air from
leaking into the ceiling void.
On completion, the gap between the unit frame and the false
ceiling must not be more than 5 mm.
Water inlet
Water outlet
Air purge valve
Water purge valv e
Water connections
Air discharge
Models Connections
dimension (Ø)
004 3/4"
008 3/4"
010 3/4"
Models Connections
dimension (Ø)
012 1"
016 1"
020 1"
GB - 9
42 GW
ENGLISH
• The unit control circuit only allows opening of the motorized
valve when the fan motor is working.
(See wiring diagrams)
• When the thermostat asks for cooling, terminal 2 of TB3 (cold
water) is supplied with 230V.
When it asks for heating, terminal 3 of TB3 (hot water) is
supplied with 230V.
• In both cases terminal 1 of TB3 (possible air renewal fan
motor) is also supplied with 230V.
• The control circuit ensures that the condensate discharge
pump works continuously while the thermostat, asking for
cooling, keeps the cold water regulating valve open.
WARNING :
The valve is not only necessary to control the room
temperature, but also to stop the cold water flow to the coil
in case of an abnormal condensing water level rise in the
drain pan.
• If there is an abnormal condensing water rise in the drain pan
(for example: possible defective drain, pump malfunction, fan
motor not working) causing the opening of the float switch
contact (FS), the control circuit either operates the condensate drain pump, or at the same time closes the regulating
valve, stopping the cold water flow towards the coil and
avoiding further condensation.
Control
The water flow has to be controlled:
• by installing the motorized thermo-electric valves supplied
as accessory
or
• by installing motorized field supplied valves.
Motorized valve and control
Instructions for mounting of motorized
thermo-electric valve assembly
(see "Components" table)
• The thermo-electric valve must be mounted on the unit after
the unit installation.
For this operation follow figures, depending on model.
• Insert the clips supplied in the unit side slots.
Electric connections
• To connect valves to the electric panel pass cables through
the electric panel grommet and connect them to the terminal
board TB3 as per the wiring diagrams.
Water connections
• Position gas reducers (see table) on the coil connection after
slightly lubricating the O-ring. Mount the O-ring towards the
coil coupling.
• Connect the valve group to the coil and fully tighten fittings.
Fittings should be tightened with a torque of 29.4 Nm.
• Insulate the valve assembly.
• Pass cables through the cable holder G and fix them to the
case using the already pre-assembled screws.
• Mount the drain pan below the valve assembly, inser ting the
discharge pipe into the special hole; align and fix it to the 3
clips previously assembled using the three screws supplied.
• Insulate the 3 screws and the drain pan lower part using the
insulating material F.
• To connect the steel pipes to the system, ensure they are
aligned and supported to avoid excess strain on the unit. If
the system is filled with water, check all fitting seals.
NOTE:
The seal efficiency of the valve assembly is factory tested.
Any system losses are therefore due to an incorrect
installation.
A B
C
E
F
G
Water inlet
Water outlet
D
Motorized thermo-electric valve assembly and components
004 012
Mod. 42GW
008 016
010 020
2-pipe
Ref. Description q.ty q.ty
A Adaptor 3/4 " gas with O-ring 2
Adaptor 1" gas with O-ring 1
B Self tapping screw 3 3
C Clip 3 3
D Valve 3/4" gas pre-assembled 1
Valve 1" gas pre-assembled 1
E Auxiliary drain pan 1 1
F Insulating material 1 1
G Cable holder 1 1
Adaptor
O-ring
Coil coupling
42 GW
GB - 10
B
Motorized valve and control
Automatic operation position
A Thermo-electric valve head
B Valve body
Instructions for field supplied valves
Water connection
• Install valves following manufacturer's instructions; refer to the
relevant figures for connection to the unit.
• Carefully insulate pipes, valve assemblies and coil connections
(cold water side) to avoid condensation forming on the pipes
and dripping on the false ceiling.
Electrical wiring
• Connect the room control following instructions for the control
used.
WARNING:
Pass cables through the control panel cable-conduit.
• Connect valves as per the following instructions, using the
wiring diagram in this chapter.
• Valves, closing the unit water inlet when there is no
power supply, must be used.
A
Operation of the thermo-electric valve
• This 3-way valve is an ON-OFF type with a very slow stroke.
It is not a modulating valve so it has no PTC.
This valve is driven, as a sensible element, by the ambient
thermostat of the “cassette” unit.
• The thermo-electric valve is normally closed towards the coil
and open towards the bypass.
When the room temperature does not satisfy the thermostat,
an electric heater activates the heating of a thermostatic
element which causes the down-stroke of the piston; the
valve opens after about 3 minutes about to allow water to
circulate in the coil.
• If the room temperature satisfies the thermostat or if the
electric power has been switched off, the valve is closed after
about 3 minutes towards the coil and is opened towards the
bypass.
• If an emergency occurs, the valve may be manually opened,
removing the electric head, unscrewing the ring nut.
When the emergency ends, remember to reset the valve to
automatic operation, repositioning the electric head;
failure to do this can result in condensate formation due
the water pipes, even if the unit is switched off.
Fan speed
H = high speed
M = medium speed
L = low speed
Heat
Cool
230V valve connection or
230V valve relay connection
H Heating valve or heating v alve relay
C Cooling valve or cooling valv e rela y
ON-OFF valves (230V)
• In this case the cold water valve must be controlled by the ONOFF signal from terminal 1 of TB3 and the hot water valve from
terminal 2 of TB3.
ON-OFF valves with other voltages than 230V
• If a room control listed in the accessories table is used, follow
the instructions in the previous paragraph and install two
230V relay at TB3 terminals 1, 2, 4 and 5 which will control
the valve opening.
• If a low voltage control is used or if the control is not listed in
the accessories table, the connections must be made on the
unit terminal board.
Control connection
C
H
GB - 11
42 GW
ENGLISH
Motorized valve and control
• If these connections are not made as described the drain
pan condensate may overflow.
• It is important to close the flow control valves when the indoor
unit control is opened between terminals 4 and 5.
The contact between terminals 4 and 5 opens when the unit is
deenergized and when the drain pan water level is too high.
• Valves should only open when the fan motor is working, i.e.
when one of TB1 terminals 1 or 2 or 3 is supplied from TB1
terminal 4.
• The water discharge pump should work every time the
cold water valve is opened, supplying TB1 terminal 7
and 8 from TB1 terminal 4.
• When the system is filled with water, verify all couplings
for tightness.
• The manufacturer does not accept responsibility for the
tightness of the field - installed valve assembly and this
is not tested in the factory. He declines any responsibility
for non functioning of these assemblies and for damage
due to dripping.
Electrical connections
Capacitor
Ground connection screw
Board
Holes for panel fixing screws
Auxiliary board (accessory)
B
A
CV
CG
CP
ST AND ARD version unit - Contr ol panel
CV
CG CP
B
A
A. Unit power supply connection
B. Polarised connector
mod. 004 - 008 - 010
mod. 012 - 016 - 020
CV
CG
CP
Fan connector
Float connector
Pump connector
42 GW
GB - 12
Connect the power cables to terminal box connectors in
accordance with the wiring diagram and tighten firmly.
IMPORTANT:
• Make ground connection prior to any other electrical
connections.
• If the unit is fitted with an electric heater, this must have a
separate power supply.
Ensure that the mains supply connection is made through a
switch that disconnects all poles, with a contact gap of at least
3 mm.
• Fix the power cable of the electric resistance heaters under the
single cable clamp. Make certain that the YELLOW/GREEN
cable is stripped back further than the others.
The control panel can be reached by opening the grille and
removing the metal covers using the 3 or 4 screws.
Electrical connections
Wiring diagram legend
Low speed
Medium speed
High speed
Power supply line
Heating selection
Common thermostat (heating)
Cooling selection
Common thermostat (cooling)
Neutral fan
Neutral in
Neutral out
Neutral
Heating out
Cooling out
Factory wiring
Field wiring
Connector
Terminal on terminals
Normally closed contact
Normally open contact
Capacitor
FC Fan capacitor
FS Safety switch float
IFM Fan motor indoor unit
PR Drain pump relay
PS Drain pump
C1-3 Connectors
HR Heating relay
CR Cooling relay
CEV Electric valve (cooling)
HEV Electric valve (heating)
PCB Relay board
HTR Electric heater
ST Safety thermostat
T Timer
TB Terminal board
Connections
L Line phase
N Neutral
Warning:
Any warranty is declined in case of
field changes of factory wiring and
settings
Note
The connection sequence does not
represent the physical lay-out.
Cables colour
A Brown
B Blue
C Black
G Grey
R Red
W White
Y-G Yellow/Green
42 GW
GB - 13
ENGLISH
Wiring diagram, standard version unit
Valves connection:
select the diagram according to the
system type
햻
햺
햹
햸
햲
햳
햴
햵
햶
햷
햿
헀
W
W
R
A
C
C
C
C
Y-G
Y-G
G
G
C
C
B
B
Y-G
Y-G
R
R
R
R
12
3
4
5
67
9
1
23
67
810
11
5
4
3
2
1
TB3
TB1
HR
F1
CR
PR
PCB
IFM
PS
1
2
FS
21
C2_F
C2_M
21
32
C1_F
1
C1_M
1
2
3
65
4321
C3_M
6
C3_F
543
2
1
1
2
FC
GND
230V ~ 60Hz
45 9
T
CN1
L
N
TB2
10
8
햾
햽
COOLING ONLY
(2 PIPE SYSTEM)
TB3
-1-
-2-
COOLING+HEATING
(2 PIPE SYSTEM)
CEV
5
4
3
2
1
TB3
CEV
5
4
3
2
1
42 GW
GB - 14
Air intake grille
Fresh air renewal and conditioned air supply to an adjacent room
• Side knockouts allow connection of fresh air inlet ducts and ducts
to deliver conditioned air to an adjacent room.
• Remove the external prepunched anti-condensate insulation and
take away the knockout panels using a punch.
Air distribution to adjacent room
With a pencil, trace a line on the polystyrene around the inside
edges of the panel that was previously removed.
Cut away the polystyrene with a knife, taking care not to damage
the heat exchange coil.
Fresh air intake
Remove the polystyrene partition.
Introduce the baffle supplied after the frame has been hooked as
per above figure (ref. ).
Following that tighten the assembly frame/grille using the 4 screws.
• Use locally purchased material, suitable for operating
temperatures of 60 °C (continuous).
Conduits can be of flexible polyester (with spiral core) or
corrugated aluminium, externally covered with anti-condensate
material (fibre glass of 12 +/- 25 mm thickness).
• To complete the installation, all non-insulated ducts must be
covered with anti-condensate insulation (ex. expanded neoprene,
6 mm thickness).
If these instructions are not observed, condensate may drip;
the manufacturer will not be held responsible for any damage
caused.
• The two prepunched side knockouts must not be used at the
same time to deliver conditioned air to an adjacent room.
• The return and supply duct lengths can be calculated in
accordance with the "air distribution to an adjacent room" and
"fresh air renewal" diagrams (also taking into account the
pressure drop through air diffusers, grilles and fresh air filters),
as well as the increase in noise caused by these ducts.
Duct connection flange
Clip
6 mm neoprene gasket
Insulated flexible duct
Fresh air intake
Conditioned air supply to an
adjacent room
Polystyrene partition
Baffle
Frame
Wall
Undercut door
Wall-fitted grille
Door-fitted grille
12010549
Ø
A
B
D
Ø
C
Model 004-008-010 012-016-020
Ø A mm 150 150
B mm 120 120
Ø C mm 70 100
D mm 285 410
GB - 15
42 GW
ENGLISH
Air flow m3/h
Available static pressure - Pa
Fresh air renewal
• The optional supplementary fan for fresh air intake (field
supplied) has to be connected to terminal block as per
diagrams enclosed.
Fan motor operation is parallel to the thermo-electric control
valve, and the motor stops when the valve shuts off.
• For winter operation with fresh air intake, an anti-freeze
thermostat set at 2°C is recommended, with the bulb placed
on the water outlet pipe, before the supplementary fan.
• The fresh air flow must be less than 10% of the total air flow,
to avoid operating problems or eccessive noise.
For higher air flow a "primary air kit" is available which uses
the prepunched hole for air ducting to an adjacent room and a
baffle so that the fresh air is introduced into the room through
a diffuser.
• Install an air inlet grille with filter inspection port to prevent
dust and dirt from entering and fouling the unit heat
exchanger.
Filter installation also makes the installation of a duct closing
damper during shut-down periods unnecessary.
Fresh air renewal and conditioned air supply to an adjacent room
Diagram of conditioned air supply to an
adjacent room: one louvre closed
In case of two louvres closed, the fresh air flow towards the
adjacent room is 50% higher compared with only one louvre
closed (with equal static external pressure)
Conditioned air supply to an adjacent room
• Air supply to an adjacent room requires that the outlet
corresponding with the duct is closed, using the air
supply outlet obstruction kit supplied.
The kit cannot be used in units equipped with electric
heater (mod. 42GWE).
An air inlet grille must be fitted (if possible near the floor)
between the air conditioned room (where the unit is situated)
and the adjacent room or, alternatively, the door must be
undercut, as shown in the drawing.
• The duct lengths can be calculated in accordance with the “air
distribution to an adjacent room” diagram, also taking into
account the pressure drop through air diffusers and fresh air
filters.
• DO NOT use active carbon or electrostatic filter kits for
ducts towards adjacent rooms.
Winter operation diagram with
fresh air intake
30
20
10
0
0
100
200
300 400
010/012
004
008
410
020
016
40
Terminal board
Antifreeze thermostat
Speed controller
Fresh air fan motor
Relay 230V
Supply air duct to adjacent room
5
4
3
2
1
TB3
L
N
TB2
230V ~ 60Hz
42 GW
GB - 16
Maintenance and owner's guide
Maintenance
Cleaning and maintenance operations must be carried out by
specially trained personnel.
Before performing any service or maintenance operations,
turn OFF the main power switch.
To open the unit grille:
Turn the two screws through 90° (1/4 turn).
Filter cleaning
Clean filters in accordance with the actual operating
conditions and times (approximately every 6 months).
• The acrylic air filter is washable in water.
Electrostatic and active carbon filters (which can be used on
the unit) are not washable but must be replaced.
Extract the filter.
First vacuum clean the filter, then wash under tap water and
finally dry.
Replace the filter in the correct position.
Prolonged shutdown:
• Before starting the air conditioner:
- clean or replace the unit air filters.
- check and clean the drain pan and the condensate discharge of
the unit
- check tightness of electric connections.
Additional maintenance
• The electric panel is easily accessible by removing the cover
panel.
The inspection or replacement of internal components such as:
fan motor, coil, condensate discharge pump, float switch, electric
heater (if fitted), involve the removal of the condensate drain pan.
Condensate drain pan removal
• During the removal operation of the condensate drain pan
protect the floor with a plastic sheet under the unit.
• Remove the frame-grille assembly by loosening the screws;
drain the condensate water contained in the drain pan into
a bucket of at least 10 litres capacity, using the special
drain with a rubber plug.
• Remove the electrical panel cover and disconnect the electric
connections, connectors C
V, CG, CP and the yellow-green
ground wire (see drawing in “electrical connections”
section).
• Remove the four fixing screws on the side of the drain pan and
carefully remove the condensate drain pan.
Guide for the owner
When installation and tests are completed instruct the Owner on the
main operating modes of the air conditioner, such as:
• Turning the unit ON and OFF.
• Changing the operation modes.
• Temperature selection.
Leave the installation manual with the owner for future use during maintenance operations or for any other needs.
Acrylic fibre
L010125H13 - 1201
Via R. Sanzio, 9 - 20058 Villasanta (MI) Italy - Tel. 039/3636.1
The manufacturer reserves the right to change any product specifications without notice.
Order No. 14254-74, December 2001. Supersedes Order No. 14254-74, July 2001. Printed in Italy
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