Immergas ERP - Main Components; Solar Circuit Filling; Solar Circuit Vent

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Solar circuit lling.
N.B.: If errors occur during installation, opera-
tion and maintenance, due to non compliance
with the technical laws in force, standards or in-
structions contained in this manual (or however
supplied by the manufacturer), the manufacturer
accepts no contractual and extra-contractual
liability for any damages and the appliance war-
ranty is invalidated.
e system can only be lled when:
- any operational residues have been eliminated
that may cause obstructions and deteriorate
the features of the glycol over time;
- 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;
- the storage tank unit has been lled;
- the expansion vessel is preloaded as per the
manufacturer's or qualified professional's
instructions.
e system must be lled only using the glycol
supplied by Immergas via an automatic pump.
e system must be lled with vent valve closed.
Proceed as follows to ll the system:
1 connect the ow pipe of the automatic pump
to the tting of the lling valve (9 Fig. 4)
located under the pump and open the valve.
2 connect the return pipe of the automatic pump
to the tting of the draining valve (8 Fig. 4)
and open the draining valve.
3 The flow-rate regulator screw (11 Fig. 4)
must be orientated horizontally to ensure the
closure of the integrated ball valve. Leave the
thermometer in the reading position (ON).
4 ll the lling pump tank with the amount of
glycol necessary plus a minimum amount to
be le on the bottom of the tank in order to
prevent air circulating inside the circuit.
5 e lling stage must have a minimum dura-
tion of 20 ÷ 25 minutes. is time is required
to completely remove all air from the circuit.
Every now and again open the ow rate regula-
tor 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 lling pressure
of the circuit followed by a quick opening of
the return valve (8 Fig. 4). is method allows
air to be expelled from the circuit.
7 Close the lling cock and switch the lling
pump o, open the regulator screw of the ow
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
2 bar + 0.1 bar for every metre in the distance
between the solar collector and the expan-
sion vessel (practically, set the same pressure
between expansion vessel and system).
10 Switch the solar pump on at a maximum speed
and make it run for at least 15 minutes.
11 Disconnect the lling pump and close the
ttings using the relevant screw caps.
Do not ll 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.
Solar circuit vent.
Any air present in the system must be bled:
- on start-up (aer lling);
- if necessary, e.g. in the case of breakdown.
Attention: danger of burns from the liquid
contained in the collectors.
Main components.
Key:
1 - Solar pump
2 - Non-return valve, thermometer and
cock
3 - Valve drain tting
4 - Flow meter
5 - 6 bar safety valve
6 - 3/4” connection for expansion vessel
7 - Manometer
8 - Draining valve
9 - Filling valve
10 - Insulating casing
11 - Flow rate regulator
12 - Boiler inlet
13 - Output towards solar collector
14 - Reference for ow rate reading
15 - Non-return valve, thermometer and
cock
16 - Degasser
17 - Inlet from solar collector
18 - Output towards boiler
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