Installation, user and maintenance manual
– GAHP-A
61
11. Switch the appliance off .
12. Close the gas valve.
13. Reinstall the cap A in Figure 6.1 Gas valve on page 59.
14. Reinstall the front panel.
6.2
MAINTENANCE
Correct maintenance prevents problems, guarantees maximum operating effi
ciency of
the appliance and allows running costs to be contained.
Before carrying out any operation on the appliance, switch it off via the CCP/DDC (or
consent switch) and wait for the shutdown cycle to terminate. When the appliance is off ,
disconnect it from the gas and electricity mains via the external circuit breaker and the
gas valve.
Any operation that regards internal components of the appliance must be carried out by
an authorized Potterton Commercial Engineer, according to the instructions supplied by
the manufacturer.
Ordinary scheduled maintenance
Perform the operations described below at least once a year. If the unit is subjected
to particularly heavy use (for example in processing plants or in other conditions of
continuous operation), these maintenance operations must be performed more often.
Maintenance operations that the user may NOT carry out (operations for a Potterton
Commercial Engineer).
• Check cleansing of the water fi lters.
• Inspecting the condensate siphon and removing any foreign substances.
• Checking that the oil pressure pump is operating correctly:
• Checking the oil level;
• Checking the transmission belts (replacement every 5 years or 10,000 hours of
operation).
• Checking the ignition and fl ame detector system.
• Checking the operation of internal components (safety and regulation equipment).
• Analysis of combustion products.
Furthermore, as regards the maintenance of the combustion unit, the following should
be done at least
once yearly
:
• Burner: clean and replace if visibly damaged on the surface.
• Electrodes: check and repair in case of incorrect physical confi guration, alumina
deposits or degraded protective ceramic and gaskets.
• Fumes limit thermostat and combustion unit: replace only after having identifi ed
the cause of the problem and made sure that it is not due to the heat exchanger
overheating. If you replace it, track the new component.
Extraordinary maintenance
The operations described in this paragraph must be carried out as and when necessary.
• Adding water and antifreeze to the hydraulic plant.
If it should become necessary to add water to the plant and, if required, to the water in
the plant (free of impurities) glycol antifreeze of the inhibited monoethylene type, for the
correct execution of these procedures, proceed as described in Section 4.6 FILLING OF
HYDRAULIC CIRCUIT on page 32.
