Immergas BASIC MAGIS PRO Instructions And Warnings page 80

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 release 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
hydraulic 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 au-
tomatic 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 dam-
age to the system in winter;
- the absence of leaks has been verified by checks
using air;
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- the storage tank unit has been filled;
- the expansion vessel has been charged accord-
ing to system requirements.
The system must be filled using only the glycol
supplied by Immergas via an automatic pump.
The system must be filled with vent valve closed.
Proceed as follows to fill the system (Fig. 45):
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 clo-
sure 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 dura-
tion of 20 ÷ 25 minutes. This time is required
to completely remove all air from the circuit.
Every now and again open the flow rate regu-
lator 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.
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7 Close the filling cock / tap and switch the filling
pump off, open the adjustment screw of the
flow rate regulator (notch in vertical position).
8 Leave the circuit pressurised. Any pressure
drop indicates a leak in the system.
9 Set the functioning pressure in the circuit
at 1.5 bar + 0.1 bar for every metre in the
distance between the solar collector and the
expansion vessel (practically, set the same
pressure between expansion vessel and system).
N.B.: Do not exceed 2.5 bar.
10 Switch the solar pump on at a maximum
speed and make it function for at least 15
minutes.
11 Disconnect the filling pump and close the
fittings using the relevant screwing plugs.
12 Open the ball valve above the pump com-
pletely.
Do not fill the system in conditions with strong
insolation and with the manifolds at high
temperatures.
Make sure that all air bubbles have been com-
pletely eliminated.
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
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