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7224230.02 - en
INSTALLATION AND OPERATING MANUAL
PRIMARY CIRCUIT
Before starting the user module, open the on/off valves on the hydraulic connectors and check the system filling pressure
in the boiler room and distribution columns (< 4 bar).
The centralised plant must have an automatic filling device.
SECONDARY CIRCUIT
IMPORTANT:
Regularly check that the pressure displayed on the pressure gauge “B” (Figure 11) is 0.9 - 1.5 bar, with
the boiler cold. In case of overpressure, open the boiler drain tap “C”. In case of insufficient temperature, open the boiler
filling tap “A”.
Open the tap very slowly in order to vent the air
.
N.B.:
the boiler is fitted with a hydraulic pressure switch prevents the boiler from working if there is no water
.
If pressure drops occur frequently, have the boiler checked by an authorised Service Engineer.
14. FILLING THE SYSTEM
In the first plant filling operation, vent any air in the system, including the user module. The appliance is fitted with an
automatic air vent valve. Set the pump in ventilation mode (refer to the section “ADJUSTING THE SELF-MODULATING
PUMP”).
15. AIR VENT SYSTEM
15.1 VENT
START-UP AND OPERATING INSTRUCTIONS
Figure 11
CR_0734
4
3
2
1
0
A
B
C
1506_1604.eps
