Carrier Air Conditioner 42GW User Manual

42GW  
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INSTALLATION MANUAL  
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42 GW  
Dimensions and weights  
575  
575  
100  
52  
50  
Ø 70  
Ø 150  
720  
550  
440  
42GW  
004 - 008 - 010  
Ø 25  
825  
825  
125  
70  
ø150  
595  
0
62  
Ø 100  
42GW  
012 - 016 - 020  
42GW  
Unit  
Frame/Grille assembly  
004  
17.5  
3
008  
19  
3
010  
19  
3
012  
36  
5
016  
38  
5
020  
38  
5
kg  
GB - 2  
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42 GW  
Technical data  
E N G L I S H  
Table I: Nominal data  
POWER INPUT  
Models  
Cooling  
Heating  
POWER INPUT  
W
A
W
A
Models  
Cooling  
Heating  
42GWE004  
42GWH004  
42GWE008  
42GWH008  
42GWE010  
42GWE012  
42GWE016  
42GWE020  
42GWE004H  
42GWE008H  
42GWE010H  
42GWE012H  
42GWE016H  
42GWE020H  
70 0.30  
70 0.30  
65 0.28  
65 0.28  
94 0.40  
123 0.53  
141 0.61  
233 1.00  
70 0.30  
65 0.28  
94 0.40  
123 0.53  
141 0.61  
233 1.00  
1560 6.8  
560 2.4  
2555 11.1  
555 2.4  
W
A
W
A
42GWC004 42GWC004H  
42GWC008 42GWC008H  
66 0.28  
78 0.34  
56 0.24  
68 0.29  
90 0.39  
87 0.38  
125 0.54  
187 0.81  
56 0.24  
90 0.39  
187 0.81  
42GWC010 42GWC010H 100 0.43  
42GWC012 42GWC012H 97 0.42  
42GWC016 42GWC016H 135 0.58  
42GWC020 42GWC020H 197 0.85  
2584 11.2  
3113 13.5  
3131 13.6  
3223 14.0  
1560 6.8  
2555 11.1  
2584 11.2  
3113 13.5  
3131 13.6  
3223 14.0  
42GWD004 42GWD004H  
66 0.28  
42GWD010 42GWD010H 100 0.43  
42GWD020 42GWD020H 197 0.85  
Note: 230V ~ 50Hz.  
Table II: Wire section of connecting cable mm2  
The power cable to the electrical heaters must be type H07 RN-F.  
The unit power cable must be type H07 RN-F.  
Models  
L/R  
N/C  
from 004 to 020  
1.0  
1.0  
Table III: Technical data of electric heaters (if installed)  
IMPORTANT:  
Mod. 004  
H004  
008  
H008  
010  
012  
016  
2x1 + 2x0.5  
400  
020  
The electric heater must  
always be factory installed  
(mod. 42GWE/H...).  
The use of other eletric  
heaters is absolutely  
prohibited.  
Failure to follow this  
safety requirement  
causes unit damage and  
voids the warranty.  
Electric heater capacity  
Supply voltage (ph)  
Max. power input  
kW  
V
1.5  
0.5  
1.5+1.0 0.25+0.25 1.5+1.0  
230 (1 ph) 230 (1 ph) 230 (*) 230 (1 ph) 230 (*)  
6.50 2.1 10.8 2.1 10.8  
400  
7.5  
400  
7.5  
A
7.5  
N° 1 Thermostat with automatic reset ST1 60°C  
Safety thermostat  
N° 1 Thermostat with manual reset(electric) ST2 100°C  
Power supply cables  
mm2 3 x 1.5 3 x 1.5 3 x 2.5 3 x 2.5  
3 x 2.5 5 x 1.5 5 x 1.5 5 x 1.5  
Recommended fuse (Type gL)  
A
8
8
12  
12  
12 10 10 10  
(*) In areas with a 2 kW limit for single-phase electric heaters it is possible to divide the power supply on two phases and  
neutral of a three phase supply with neutral.  
Use cable type HO7 RN-F - 4 x 1.5 mm2  
-
400V 2N~  
Table IV:  
Description  
Q.ty  
Use  
Material supplied  
Installation instructions  
Fresh air intake baffle  
1
1
Unit installation  
Air renewal  
Table V: Operating limits  
Water circuit  
Water- side maximum pressure  
Minimum entering water temperature: + 4°C  
Maximum entering water temperature: + 80°C  
Minimum temperature: 5°C (1)  
1400 kPa (142 m w.c.)  
Room air  
Maximum temperature 32°C  
Power supply  
Nominal single phase voltage  
Operating voltage limits  
230V ~ 50Hz  
60Hz Special Export Market  
min. 187V max. 253V  
min. 198V max. 264V  
Nominal three phase voltage  
Operating voltage limits  
400V 3N~ 50Hz  
min. 342V max. 462V  
Notes: (1) If the room 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).  
Table VI: Accessories  
Description  
Size / Code  
Description  
Size / Code  
004-008-010  
012-016-020  
004-008-010-012-016-020  
2-pipe valve  
4-pipe valve  
Primary air  
42GW9003  
42GW9004  
42GW9005  
42GW9007  
42GW9008  
42GW9006  
Water discharge pump  
Control  
Control  
Control  
Control  
40GKX9001  
42GW9014  
42GW9015  
42GW9016  
42GW9017  
33DFS-RM  
42GW9013  
Air disch. closing  
40GK-900---003-40 40GK-900---013-40  
40GK-900---002-40 40GK-900---012-40  
40GK-900---001-40 40GK-900---011-40  
*
Active carbon filter  
Electrostatic filter  
Drain pan  
Control CRC  
Auxiliary board  
42GW9009  
42GW9010  
Not to be used on units equipped with electric heater (mod.42GWE)  
*
GB - 3  
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42 GW  
General Information  
Unit installation  
Choosing the installation site  
Read this instruction manual thoroughly before starting  
installation.  
Positions to avoid:  
Exposure to direct sunlight.  
Areas close to heat sources.  
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.  
On damp walls or in positions that may be exposed to water  
hazard.  
Follow all current national safety code requirements.  
In particular ensure that a properly sized and connected ground  
wire is in place.  
Where curtains or furniture may obstruct free air circulation.  
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.  
Recommendations:  
Choose an area free from obstructions which may cause uneven  
air distribution and/or return.  
Consider using an area where installation is easy.  
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.  
Choose a position that allows for the clearances required.  
Look for a position in the room which ensures the best possible air  
distribution.  
After installation thoroughly test system operation and explain all  
system functions to the owner.  
Install unit in a position where condensate can easily be piped to an  
appropriate drain.  
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.  
GB - 4  
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42 GW  
Avoid...  
E N G L I S H  
... 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.  
... 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.  
... exposure to oil vapours.  
... installation in areas with high frequency waves.  
... only partial insulation of the piping.  
Non-level installation which will cause condensate dripping.  
MAX. 200 mm  
... 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.  
... horizontal sections or curves of condensate drain piping with less  
than 2% slope.  
...slack on electrical connections.  
GB - 5  
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42 GW  
Installation  
Max. 2 louvres closed  
Heating: louvre position for  
correct air flow.  
Cooling: louvre position for  
correct air flow.  
Warning: To close one or two air outlets use the special kit  
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).  
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.  
In rooms with high humidity, brackets should be insulated by self  
adhesive insulation supplied.  
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.  
Installation  
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.  
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.  
Prior to installation  
Washer  
Nut  
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.  
Threaded hangers  
Washer  
Nut  
Wooden frame  
Threaded hangers  
Washers  
Nut  
Nut  
IMPORTANT:  
Do not lift the unit by the condensate drain discharge pipe;  
hold it by its four corners only.  
Once the threaded hangers have been positioned, do not tighten  
the nuts, and insert the washers as shown in the drawing.  
Unit installation will be facilitated using a stacker.  
GB - 6  
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42 GW  
Installation  
E N G L I S H  
Condensate drain pipe  
Threaded hangers  
"T" bar  
(to be removed)  
2%  
First position the connection lines , as described in the chapter  
"Water connections".  
Remove the "T" bar in order to facilitate installation operations.  
Suspension brackets  
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).  
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.  
mm  
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.  
False ceiling  
Spirit level  
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.  
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.  
The condensate pipe must be insulated with a condensation-  
proof 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.  
After connection of the condensate drain line and the refrigerant  
lines, carry out a final check to make sure that the unit is level.  
GB - 7  
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42 GW  
Installation  
Frame pre-hooking support  
Safety belt  
Frame fixing screw  
A. Gasket "A"  
B. Gasket "B"  
A
B
Air discharge  
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.  
Installation of grille/frame assembly  
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.  
Carefully unpack the assembly and check for damage sustained in  
transit. Attach the assembly to the unit by using the two hooks.  
On completion, the gap between the unit frame and the false  
ceiling must not be more than 5 mm.  
Use the screws supplied to fix the frame in position.  
Water connections  
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.  
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.  
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).  
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.  
Models  
Connections  
Models  
Connections  
dimension (Ø)  
dimension (Ø)  
004  
008  
010  
3/4"  
3/4"  
3/4"  
1/2"  
1/2"  
012  
016  
020  
1"  
1"  
1"  
004  
010  
020  
3/4"  
*
*
*
Hot water circuits, four-pipe version  
*
Water inlet  
Water outlet  
Air purge valve  
Water purge valve  
GB - 8  
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42 GW  
Motorized valve and control  
E N G L I S H  
• The unit control circuit only allows opening of the motorized  
valve when the fan motor is working.  
(See wiring diagrams)  
Instructions for mounting of motorized  
thermo-electric valve assembly  
(see "Components" table)  
• When the thermostat asks for cooling, terminal 1 of TB3 (cold  
water) is supplied with 230V.  
When it asks for heating, terminal 2 of TB3 (hot water or  
electric heater) is supplied with 230V.  
• The thermo-electric valve must be mounted on the unit after  
the unit installation.  
For this operation follow figures, depending on model.  
• The control circuit ensures that the condensate discharge  
pump works continuously while the thermostat, asking for  
cooling, keeps the cold water regulating valve open.  
• Insert the clips supplied in the unit side slots.  
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 c  
ondensate drain pump, or at the same time closes the  
regulating valve, stopping the cold water flow towards the  
coil and avoiding further condensation.  
Assembly  
For models 42GWD (4-pipe), the valve assembly for the  
cold water coil must be installed first.  
• Gently grease the O-rings before fitting them into their  
Control  
seats.  
The water flow has to be controlled:  
by installing the motorized thermo-electric valves supplied  
as accessory  
Sizes 004 - 008 - 010  
or  
»
» Ring nut  
O-ring  
Coil coupling  
by installing motorized field supplied valves.  
Motorizedthermo-electricvalveassemblyandcomponents  
See diagram supplied with  
the kit..  
D
A
B
C
Sizes 012 - 016 - 020  
Adaptor  
O-ring  
Coil coupling  
Fit the reducers and O-rings  
towards the coil connection.  
D1  
F
• Connect the valve assemble to the coil and fix it by a 30Nm  
torque.  
G
E
• Insulate the valve assembly.  
• For 4-pipe hot water coil, repeat all the operations with gas  
adaptors, as per the table.  
• Pass cables through the cable holder G and fix them to the  
Water inlet  
Water outlet  
case using the already pre-assembled screws.  
004  
008  
010  
012  
016  
020  
004 020  
010  
• Mount the drain pan below the valve assembly, inserting the  
discharge pipe into the special hole; align and fix it to the 3  
clips previously assembled using the three screws supplied.  
Mod. 42GW  
2-pipe  
4-pipe  
Ref. Description  
q.ty  
q.ty  
q.ty  
q.ty  
• Insulate the 3 screws and the drain pan lower part using the  
insulating material F.  
A
Adaptor 3/4 " gas with O-ring  
Adaptor 1" gas with O-ring +  
Adaptor 3/4" gas with O-ring +  
Self tapping screw  
2
2+  
2
• 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.  
B
C
D
3
3
3
3
1
3
3
3
3
Clip  
Valve 1" gas pre-assembled  
Valve 1" gas pre-assembled +  
Valve 3/4" gas pre-assembled  
NOTE:  
The seal efficiency of the valve assembly is factory tested.  
Any system losses are therefore due to an incorrect  
installation.  
1+  
1
D1 Valve 3/4" gas pre-assembled  
Valve 3/4" gas pre-assembled  
Valve 1/2" gas pre-assembled  
1
1+  
1
Electric connections  
E
F
Auxiliary drain pan  
Insulating material  
Cable holder  
1
1
1
1
1
1
1
1
1
1
• 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.  
1
G
1
GB - 9  
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42 GW  
Motorized valve and control  
Automatic operation position  
ON-OFF valves (230V)  
Thermo-electric valve  
head  
Valve body  
• In this case the cold water valve must be controlled by the ON-  
OFF 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.  
004 - 008 - 010  
012 - 016 - 020  
230V valve connection or  
230V valve relay connection  
Operation of the thermo-electric valve  
C
H
• 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.  
H Heating valve or heating valve relay  
C Cooling valve or cooling valve relay  
• 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 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.  
• 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.  
Control connection  
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:  
Fan speed  
Pass cables through the control panel cable-conduit.  
H
= high speed  
M = medium speed  
= low speed  
• Connect valves as per the following instructions, using the  
wiring diagram in this chapter.  
L
Heat  
Cool  
Valves, closing the unit water inlet when there is no  
power supply, must be used.  
GB - 10  
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42 GW  
Motorized valve and control  
E N G L I S H  
If these connections are not made as described the drain  
pan condensate may overflow.  
The water discharge pump should work every time the  
cold water valve is opened, supplying TB1 terminal 7 and  
8 from TB1 terminal 4.  
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.  
When the system is filled with water, verify all couplings  
for tightness.  
The optional electric heater (mod. 42GWE) which can only be  
factory installed, must only be energized when the fan is  
working.  
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.  
The optional electric heater which must be factory installed on  
model 42GWE, works only if TB1 terminals 5-6 are supplied  
from TB1 terminal 4.  
Electrical connections  
We recommend to remove the main board from the electric  
panelboard for better access to electric connections.  
STANDARD version unit - Control panel  
CV  
C
C
CG  
CP  
CV  
CP  
CG  
A
B
A
B
mod. 012 - 016 - 020  
mod. 004 - 008 - 010  
Capacitor  
Ground connection screw  
Board  
Relay board E-HTR (only on  
models with electric heater)  
Holes for panel fixing screws  
Auxiliary board (accessory)  
A. Electric heater supply connection  
CV  
Fan connector  
Float connector  
B. Unit power supply connection  
C. Polarised connector  
CG  
CP  
Pump connector  
GB - 11  
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42 GW  
Electrical connections  
The control panel can be reached by opening the grille and  
removing the metal covers using the 3 or 4 screws.  
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.  
IMPORTANT for units with electric heaters;  
The unit is equipped with two thermostats: one with automatic  
reset and one with manual (electric) reset that can be  
reactivated by switching the power supply off and then on.  
Connect the power cables to terminal box connectors in  
accordance with the wiring diagram and tighten firmly.  
Wiring diagram legend  
Cables colour  
Factory wiring  
Low speed  
A
Brown  
Blue  
Field wiring  
Medium speed  
High speed  
B
Connector  
C
Black  
G
Grey  
Terminal on terminals  
Normally closed contact  
Normally open contact  
Capacitor  
Power supply line  
Heating selection  
Common thermostat (heating)  
Cooling selection  
Common thermostat (cooling)  
Neutral fan  
R
Red  
W
Y-G  
White  
Yellow/Green  
FC Fan capacitor  
FS Safety switch float  
IFM Fan motor indoor unit  
PR Drain pump relay  
PS Drain pump  
Connections  
L
Line phase  
Neutral in  
N
Neutral  
Neutral out  
Neutral  
C1-3 Connectors  
Warning:  
Any warranty is declined in case of  
field changes of factory wiring and  
settings  
Heating out  
HR Heating relay  
Cooling out  
CR Cooling relay  
CEV Electric valve (cooling)  
HEV Electric valve (heating)  
PCB Relay board  
Note  
The connection sequence does not  
HTR Electric heater  
ST Safety thermostat  
represent the physical lay-out.  
T
Timer  
TB Terminal board  
GB - 12  
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42 GW  
Wiring diagram, standard version unit  
E N G L I S H  
Electric heater  
230V ~ 50Hz  
supply  
04E / 04H  
N
1
TB1  
2
3
4
5
8
9 10 11  
6
7
230V ~ 50Hz  
R
ST1  
N
L
R
C
C
ST2  
TB2  
TB3  
CR  
HR  
L
N
1-HTR  
2
5
E-HTR  
PR  
PCB TB3”  
5
4
3
2
1
08/10E / 08-H  
230V ~ 50Hz  
N
R
ST1  
N
L
R
C
C
T
ST2  
CN1  
PCB  
2-HTR  
1
2
3
10  
4
6
7
8
9
5
1-HTR  
2
5
B
E-HTR  
PCB TB3”  
C
G
W
230V  
TAKEN FROM  
08/10E  
400V 3N~ 50Hz  
N
R
ST1  
NRST  
R
C
Y-G  
C
ST2  
Y-G  
1
1
2
2
3
3
4
4
5
5
6
6
1
2
3
1
2
C3_F  
C3_M  
GND  
C1_F  
C1_M  
C2_F  
C2_M  
1
2
3
1
2
2-HTR  
1-HTR  
2
5
E-HTR  
PCB TB3”  
R
R
2
12/16/20E  
FS  
400V 3N~ 50Hz  
PS  
N
1
IFM  
R
ST1  
NRST  
R
2
A
R
C
C
FC  
ST2  
4-HTR  
1
2-HTR  
3-HTR  
COOLING ONLY  
(2 PIPE SYSTEM)  
-1-  
TB3  
1-HTR  
5
4
3
2
1
2
5
Valves connection:  
select the diagram according to the  
system type  
CEV  
E-HTR  
PCB TB3”  
12/16/20–E  
-2-  
COOLING+HEATING  
(2 PIPE SYSTEM)  
230V 3N~ 60Hz  
TB3  
TB3  
N
5
4
3
2
1
CEV  
R
ST1  
NRST  
R
C
C
ST2  
4-HTR  
-3-  
COOLING+HEATING  
(4 PIPE SYSTEM)  
2-HTR  
3-HTR  
5
4
3
2
1
HEV  
CEV  
1-HTR  
2
5
E-HTR  
PCB “TB3”  
GB - 13  
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42 GW  
Fresh air renewal and conditioned air supply to an adjacent room  
B
A
Ø
C
216  
A
Ø
Duct connection flange  
Clip  
6 mm neoprene gasket  
Insulated flexible duct  
Fresh air intake  
Conditioned air supply to an  
adjacent room  
Model  
Ø A  
B
004-008-010 012-016-020  
mm  
mm  
mm  
150  
120  
70  
150  
120  
100  
Ø C  
Polystyrene partition  
Baffle  
Frame  
Air intake grille  
Wall  
Undercut door  
Wall-fitted grille  
Door-fitted grille  
Side knockouts allow connection of fresh air inlet ducts and ducts  
to deliver conditioned air to an adjacent room.  
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).  
Remove the external prepunched anti-condensate insulation and  
take away the knockout panels using a punch.  
To complete the installation, all non-insulated ducts must be  
covered with anti-condensate insulation (ex. expanded neoprene,  
6 mm thickness).  
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.  
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  
Fresh air intake  
same time to deliver conditioned air to an adjacent room.  
Remove the polystyrene partition.  
Introduce the baffle supplied after the frame has been hooked as  
per above figure (ref. ).  
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.  
Following that tighten the assembly frame/grille using the 4 screws.  
GB - 14  
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42 GW  
Fresh air renewal and conditioned air supply to an adjacent room  
E N G L I S H  
Fresh air renewal  
Conditioned air supply to an adjacent room  
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.  
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.  
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.  
The duct lengths can be calculated in accordance with the air  
distribution to an adjacent roomdiagram, 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.  
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.  
Diagram of conditioned air supply to an  
adjacent room: one louvre closed  
Winter operation diagram with  
fresh air intake  
40  
30  
230V ~ 60Hz  
20  
010/012  
016  
10  
004  
008  
020  
TB2  
L
0
410  
400  
0
100  
200  
300  
N
Air flow m3/h  
TB3  
5
4
3
2
1
Terminal board  
Antifreeze thermostat  
Speed controller  
Fresh air fan motor  
Relay 230V  
Supply air duct to adjacent room  
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)  
GB - 15  
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42 GW  
Maintenance and owner's guide  
Maintenance  
Cleaning and maintenance operations must be carried out by  
specially trained personnel.  
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.  
Before performing any service or maintenance operations,  
turn OFF the main power switch.  
To open the unit grille:  
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 CV, CG, CP and the yellow-green  
ground wire (see drawing in electrical connections”  
section).  
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.  
Remove the four fixing screws on the side of the drain pan and  
carefully remove the condensate drain pan.  
Extract the filter.  
Guide for the owner  
When installation and tests are completed instruct the Owner on the  
main operating modes of the air conditioner, such as:  
Acrylic fibre  
Turning the unit ON and OFF.  
Changing the operation modes.  
Temperature selection.  
First vacuum clean the filter, then wash under tap water and  
finally dry.  
Replace the filter in the correct position.  
Leave the installation manual with the owner for future use dur-  
ing maintenance operations or for any other needs.  
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.  
GB - 16  
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L010122H22 - 0405  
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. 14207-74M10, April 2005. Supersedes Order No. 14207-74M10, December 2004.  
Printed in Italy  
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