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Percentage of
glycol
10%
20%
30%
40%
■ Electrical connections
10 / 74
Efficiency cor-
Freezing point [°C]
rection factor
-3.2
0.985
-7.8
0.98
-14.1
0.97
-22.3
0.965
performance permanently. Do not forget to flush the system once the room is frost-free.
If glycol water is used, plan an annual control of the glycol quality. Use monopropylene
type glycol only. The recommended concentration should not exceed 40%.
If glycol is not used, trace the pipes electrically outside.
• In certain installations, the presence of different metals can cause corrosion
problems; in this case, the formation of metal particles and sludge in the
hydraulic circuit is seen.
- Please refer to the chapter "Treatment of domestic and heating water" in our price
catalogue
• It is also necessary to ensure that the treated water does not become aggressive
for the circuit.
Ensure that the general electrical power supply has been cut off before starting any
repair work.
Characteristics of the electrical power supply
The electrical installation must be conducted in accordance with the regulations in effect
and in particular to current I.E.E. (BS7671) Wiring Regulations
The electrical installation must be equipped with a differential protection.
This appliance is designed to operate under a nominal voltage of 400 V +/- 10%, 50 Hz.
For installations without neutral, a galvanic isolating transformer must be used that is
earthed on the secondary side.
The electrical connections will only be made when all of the other assembly operations
(attachment, assembly,...) have been carried out.
Never use a socket for the power supply.
CAUTION:
The contract with the energy supplier must cover the maximum electrical requirement of
the installation.
The outdoor unit must be supplied directly (without external switch) by a dedicated line
protected at the start by a dedicated isolator switch. (Seer "Current source" paragraph).
Absorbed power
Water flow rate
correction factor
correction factor
1
1.02
0.99
1.05
0.98
1.10
0.97
1.14
Loss of head cor-
rection factor
1.08
1.12
1.22
1.25
00U07352250-A_EN
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