Coil
Accidental contact with the exchanger flaps can cause injuries
from cut: use protective gloves.
The coil must allow maximum thermal exchange, therefore, the
surface must be clear from dirt and scaling.
Clean the air inlet side.
Use a soft brush or aspirator.
Check the aluminium flaps have not been damaged or folded,
otherwise will be from "comb" the coil for excellent air flow.
( contact an authorised after-sales assistance centre )
Safety valve
The safety valves must be checked regularly.
Almost all losses are caused by impurities deposited inside the
valve.
It’s normal if some water drops from the hole of saftey valve
during operation. But, if there is a great amount of water, call
your service agent for instructions
If water doesn't flow freely when operating the handle, replace
safety valve with a new one
Nota
Please beware of burn, beware of the hot water from the
val-ve.
To clean the valve:
Manually open the valve
Turn the knob as indicated by the arrow on the knob itself
Expansion tank
Check the expansion vessel charge (at least once a year).
First check that the expansion vessel is totally drained of water.
If you necessary load with nitrogen, take care that the pressure
does not exceed the value indicated on the label.
Structure
Check the condition of the structure parts .
Paint so as to eliminate or reduce oxidation where needed.
Check that the paneling is correctly fastened. Poor fastening may
give rise to malfunctions and abnormal noise and vibration .
Restart after a long term stop
When the unit is restarted after a long term stop (included trail
running), it is normal that outlet water is unclean. Keep the tap
on and the water will be clean soon.
11 MAINTENANCE
