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Checklist for annual maintenance
Check the following elements at least once a year:
– Visual inspection of the general state of the system.
– Carry out a general inspection of the system oper-
ation.
– Outdoor unit heat exchanger.
The heat exchanger of the outdoor unit may be ob-
structed by dust, dirt, leaves, etc.
A heat exchanger lock-out can lower or raise the pres-
sure levels excessively; if the unit works in these condi-
tions, the performances will deteriorate with respect to
the declared values. Remove the obstructions, if pres-
ent.
– Front grille of the outdoor unit.
The front grille of the outdoor unit can get clogged. Re-
move the obstructions, if present.
– Plumbing connections.
Visually inspect all the sleeves, pipes and plumbing
connections to identify any leakages. Replace the seals
if necessary.
– Water pressure.
Check that the water pressure value is between 1 and
2 bar.
– Expansion vessel.
Check the pre-charge pressure of the expansion vessel
and replenish it if it is too low or replace it if damaged.
– Water filter (if installed).
Clean the water filter frequently to remove any residues.
– Multi-function magnetic filter.
Following a prolonged shutdown, dirt residues may
deposit in the system and clog the filter. We therefore
recommend verifying the condition of the filter in these
situations.
Check that both parts of the magnetic filter are tightly
screwed on.
To clean the filter a 3/4"-diameter hose is required for
draining the water. Use an intermediate hose connec-
tion to connect the hose. Proceed as follows:
– Loosen the ring nut (1) using the relevant tool.
– Remove the side band (2).
– Fasten the relevant hose connector (3) to the outlet (4)
and connect the pipe (5).
– Open the valve (6).
Note: with column-type units, use the hose connector in-
stalled on the indirect cylinder discharge outlet.
1
a
The filter must be opened only during extraordi-
nary maintenance when the filter is clogged. To
clean the metal mesh, proceed as follows:
– Loosen ring nut (7) and, using the relevant tool, remove
the lower part of the filter to access the metal mesh.
– Remove the metal mesh and clean it.
– Mount the metal mesh back on and screw the lower
part of the filter back on.
– Safety valve discharge pipe.
Check that the pipe of the overpressure valve is proper-
ly positioned for draining the water and removing any
obstructions.
– Abnormal noises/vibrations of the outdoor unit.
Check the noise level of the outdoor unit: if it appears
to be abnormal (for example, due to contacts or rub-
bing between metal parts), check the tightness of the
screws and of the vibration-damping supports and the
spacing between pipes (especially those with reduced
diameter, such as the capillary pipes in the evaporator).
7
2
6
4
3
Fig. 104
77 / EN
Service
5
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