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2.7
INDOOR UNIT SHUTDOWN
Switch off the indoor unit, putting it in "off" mode. Switch off the
omni-polar switch outside the unit.
Never leave the unit powered if left unused for prolonged 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. 1.22).
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. 1.22).
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 EMPTYING THE D.H.W. CIRCUIT
To do this, always close the domestic cold water inlet upstream of
the appliance.
Open any domestic hot water tap to discharge the pressure from
the circuit.
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2.11 ANTIFREEZE PROTECTION
The indoor unit has an anti-freeze function that automatically
switches on the outdoor unit when the temperature drops below
4°C (standard protection up to a minimum temperature of -5°C).
All information relative to the antifreeze protection is stated in
(Parag. 1.5).
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.
2.12 PROLONGED INACTIVITY
In case of prolonged inactivity (e.g. second home), we recom-
mend:
1. to switch off the power supply;
2. completely empty the central heating circuit and the indoor
unit domestic hot water circuit. In systems that are drained
frequently, filling must be carried out with suitably treated
water to eliminate hardness that can cause lime-scale.
2.13 CLEANING THE CASE
1. Use damp cloths and neutral detergent to clean the indoor unit
casing.
Never use abrasive or powder detergents.
2.14 PERMANENT SHUTDOWN
Should the system be shut down permanently, have professional
staff carry out the procedures, making sure that the electrical and
water supply lines have been previously shut off.
2.15 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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