Immergas BASIC MAGIS PRO Instructions And Warnings page 109

1.29 COOLING / CENTRAL HEATING CIRCUIT
SYSTEM FILLING.
Once hydraulically installed, proceed with system filling via the
filling cock / tap. Filling is performed at low speed to ensure re-
lease of air bubbles in the water via the indoor unit, heat pump
and heating system vents.
The pump may be noisy on start-up due to the presence of air.
This noise should stop after a few minutes of functioning and
however after having correctly bled the air contained in the hy-
draulic circuit.
Make sure that the vent hoods are loosened. Open the radiator
vent valves.
Close radiator vent valves when only water escapes from them.
The filling cock must be closed when the indoor unit pressure
gauge indicates approximately 1.2 bar.
N.B.: during these operations activate the automatic vent functions
on the heat pump (see relative instruction booklet).
1.30 FILLING THE SOLAR CIRCUIT SYSTEM
(OPTIONAL).
The system can only be filled when:
- the system is completely assembled;
- any processing residues that cause obstructions and through
time deteriorate the features of the glycol have been eliminated;
- any presence of water in the system has been eliminated, which
could otherwise cause damage to the system in winter;
- the absence of leaks has been verified by checks using air;
- the storage tank unit has been filled;
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10
11
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8
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- the expansion vessel has been charged according to system
requirements.
The system must be filled using only the glycol supplied by Im-
mergas via an automatic pump. The system must be filled with
vent valve closed.
Proceed as follows to fill the system (Fig. 56):
1 connect the automatic pump flow pipe to the filling cock / tap
fitting (9) positioned below the pump and open the valve itself.
2 connect the automatic pump return pipe to the draining cock /
tap fitting (8) and open the draining valve.
3 The flow rate regulator adjustment screw (11) must be horizontal
in order to guarantee closure of the integrated ball valve. Open
the ball valve with thermometer (2) positioned over the pump.
4 fill the filling pump tank with the amount of glycol necessary
plus a minimum stock to be left on the bottom of the tank in
order to prevent air circulating inside the circuit.
5 The filling phase must have minimum duration of 20 ÷ 25 min-
utes. This time is required to completely remove all air from
the circuit. Every now and again open the flow rate regulator
adjustment screw in order to eliminate air from inside (vertical
position).
6 Eliminate any air in the solar circuit preferably using the so-
called "pressure shot" method, which consists in raising the filling
pressure of the circuit followed by a quick opening of the return
valve (8). This method allows air to be expelled from the circuit.
7 Close the filling cock / tap and switch the filling pump off, open
the adjustment screw of the flow rate regulator (notch in vertical
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1
IN
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Key:
1 - Solar pump
2 - Non return valve, thermometer
and
cock
3 - Safety valve drain fitting
4 - Flow meter
5 - 6 bar safety valve
6 - 3/4" connection for expansion
vessel
7 - Pressure gauge
8 - Draining cock / tap
9 - Filling cock / tap
10 - Insulating casing
11 - Flow rate regulator
12 - Inlet
13 - Outlet
14 - Reference for flow rate reading
4 11
1
8 9
7
5
56
2
OUT
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6
109