7
4.2.1 - INSULATION OF PIPES
• Insulate the 2 tubes separately.
• Use polyethylene sheathing at least 8 mm thick.
• Pay particular attention to water entering along the pipes through the wall.
4.2.2 - CONNECTION TO THE INDOOR UNIT
• According to the side for pipe passage, knock out one cap. Protect the pipes passage from metal sheet edge using the rubber
seal supplied or the rubber profile supplied. For sides outlet, the rubber seal has to be cut in 2 parts, as well as the top of it.
Dia. of pipes
1/4"
3/8"
1/2"
Tightening torque
1 kgf-m
3 kgf-m
5 kgf-m
• Connect the gas and liquid tubes on the corresponding Flare connectors.
• Screw up by hand.
• Tighten using torque wrenches (to torques shown in the adjacent table).
• Caution: hold the FLARE coupling tight using a wrench.
4.2.3 - CONNECTION TO THE OUTDOOR UNIT
• Connect the gas and liquid tubes on the corresponding Flare
valves.
• Screw up by hand.
• Tighten using torque wrenches (to torques shown in the table
below).
Refrigerant
valves
GRV 72 L
GRV 92 L
GRV 122 L
GRV 180 L
4.2.4 - USING THE FLARE VALVE
• After completing the connection to the internal and external units,
the connections and internal unit must be bled.
• Proceed as indicated below:
1 - Remove the valve covers.
2 - Remove the vacuum tap cover.
3 - Connect the vacuum pump.
4 - We recommend that you add a stop valve.
5 - After drawing the vacuum, close the stop valve.
6 - Fully open the two valves.
7 - Remove the vacuum pump and the stop valve.
8 - Screw in the cover on the vacuum tap.
9 - Screw up the valve covers.
10 - Add refrigerant gas if necessary (see paragraph 4.2).
Note: Refrigerant and electrical lines can be supplied as
accessories (see accessories chapter).
4.3 - ELECTRICAL CONNECTION
NOTES:
• Class 1 appliance.
• The electrical connection conduits must be fixed.
• The electrical installation must be carried out in compliance with the rules in force (especially NFC 15-100
CEI 364).
• The cables are not included in the supplies.
MAINS SUPPLY
• The electrical power supply must be safeguarded by a protection device and disconnect switch (not supplied) in
accordance with existing regulations, and is connected to the internal unit (see the connection diagrams below). The
power supply is connected on the indoor unit for models 152, 202, and 302 and on the outdoor unit for model 402 (see
wiring diagram, page 8).
• The acceptable voltage variation is
±
10% during operation
4.3.1 - CONNECTION CABLES
A - STANDARD INSTALLATION WITH THERMOSTAT CONTROL
Mains power cable
• In 230V/1/50Hz
: 3 G 2.5 mm
2
.
• In 400V/3N/50Hz
: 5 G 2.5 mm
2
.
Connection cable between the units (TAV/GRV)
• Use a cable of section equivalent to that of the mains power cable.
Dia. of pipes
1/4"
3/8"
1/2"
Tightening torque
1.5 ~ 2.0 kgf-m
3.0 ~ 4.0 kgf-m
4.5 ~ 5.5 kgf-m
Liquid side
Gas side
2-way valve
Indoor
unit
3-way valve
