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INSTALLER
USERMAINTENANCE TECHNICIAN
TECHNICAL DATA
2.7 INDOOR UNIT SHUTDOWN
Switch the indoor unit o by putting it in “o ” mode, disconnect
the omnipolar switch outside of the indoor unit and close the gas
c o c k u p s t r e a m f r o m t h e a p p l i a n c e .
Never leave the indoor unit switched on if le 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 aer 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 qualied personnel).
5. In the event of frequent pressure drops, contact qualied sta
for assistance to eliminate the possible system leakage.
2.9 DRAINING THE SYSTEM
1 . E n s u r e t h a t t h e l l i n g c o c k i s c l o s e d .
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 uid containing glycol was added to the system cir-
c u i t , m a k e s u r e i t i s re c o v e r e d a n d d i s p o s e d o f i n a c c o r d-
ance with standard EN 1717.
2.10 ANTIFREEZE PROTECTION
e i n d o o r u n i t h a s a n a n t i f r e e z e f u n c t i o n o f t h e h e a t p u m p c i r c u -
lator that switches on when the water temperature drops below 8
°C.
e 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).
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 o the power supply;
- completely empty the central heating circuit and the indoor
unit domestic hot water circuit. In systems that are drained fre-
quently, lling 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 sta for the procedures and ensure that the electrical,
water and gas supply lines are shut o 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.
e settings on the remote panel, such as operating mode, ow
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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