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2.7
INDOOR UNIT SHUTDOWN
Switch the indoor unit off by putting it in "off" mode, disconnect
the omnipolar switch outside of the indoor unit and close the gas
cock upstream from the appliance.
Never leave the indoor unit switched on if left unused for pro-
longed periods.
2.8 RESTORE CENTRAL HEATING SYSTEM
PRESSURE
1. Periodically check the system water pressure (the indoor
unit's pressure gauge hand must indicate a value between 1
and 1.2 bar).
2. If the pressure is less than 1 bar (with the system cold), you
must restore it using the cock located at the bottom of the unit
(Parag. 1.38).
3. Close the cock after the operation.
4. If the pressure reaches values around 3 bar, there is a risk of
tripping the safety valve (in this case, remove water from a ra-
diator air vent valve until a pressure of 1 bar is achieved, or ask
for assistance from professionally qualified personnel).
5. In the event of frequent pressure drops, contact qualified staff
for assistance to eliminate the possible system leakage.
2.9
DRAINING THE SYSTEM
1. Ensure that the filling cock is closed.
2. Open the draining cock (Parag. 1.38).
3. Open all vent valves.
4. At the end, close the emptying cock.
5. Close all previously opened vent valves.
If fluid containing glycol was added to the system cir-
cuit, make sure it is recovered and disposed of in accord-
ance with standard EN 1717.
2.10 ANTIFREEZE PROTECTION
The indoor unit has an antifreeze function of the heat pump circu-
lator that switches on when the water temperature drops below 8
°C.
The indoor unit has a further anti-freeze function that automati-
cally switches on the heat generator or operation in heat pump
mode when the temperature drops below 4°C (standard protec-
tion up to a minimum temperature of -5 ° C).
All information relative to the antifreeze protection is stated in
(Parag. 1.5).
62
In order to guarantee the integrity of the appliance and the do-
mestic hot water heating system in areas where the temperature
drops below zero, we recommend protecting the central heating
system using anti-freeze liquid and installing the Immergas Anti-
freeze Kit in the indoor unit.
In the case of prolonged inactivity (second case), we also recom-
mend that:
- to switch off the power supply;
- completely empty the central heating circuit and the indoor
unit domestic hot water circuit. In systems that are drained fre-
quently, filling must be carried out with suitably treated water to
eliminate hardness that can cause lime-scale.
2.11 CLEANING THE CASE
1. Use damp cloths and neutral detergent to clean the indoor unit
casing.
Never use abrasive or powder detergents.
2.12 PERMANENT SHUTDOWN
In the event of permanent shutdown of the indoor unit, contact
professional staff for the procedures and ensure that the electrical,
water and gas supply lines are shut off and disconnected.
2.13 USE OF THE REMOTE ZONE PANEL
(OPTIONAL)
For general operation of the zone remote panel, see the relative in-
struction booklet.
The settings on the remote panel, such as operating mode, flow
setting, humidity setting etc. are synchronised with those on the
control panel.
Moreover, the control panel is not disabled if there is any zone re-
mote panel.
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