Installation, user and maintenance manual
– AY Condensing line, AY series
69
Before carrying out any operation on the appliance, switch it off via the appropriate
on/off command (or via the DDC, if connected and in controller mode) and wait for
the shutdown cycle to terminate. When the appliance is off, disconnect it from the gas
and electricity mains, bearing in mind the antifreeze settings, via the external circuit
breaker (GS) and the gas valve.
Any operation that regards internal components of units of the appliance must be
carried out by an authorized Robur Technical Assistance Centre (TAC), 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 con-
tinuous operation), these maintenance operations must be performed more often.
Maintenance operations that the user may NOT carry out (operations for a Robur
TAC).
Checking the ignition and flame 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:
Combustion chamber: remove any deposits after having cleaned the heat ex-
•
changer with a soft brush (not metal bristles). Do not use acid or alkaline cle-
aning products.
Rear interior insulation: replace if visibly damaged or obstructing the condensa-
•
te evacuation siphon so that the combustion chamber has filled up.
Hatch and burner gaskets: replace if visibly damaged. The silicon gasket used
•
on the Isothermic model must be replaced every two years whether damaged
or not.
Burner: replace if visibly damaged on the surface.
•
Electrodes: check and repair in case of incorrect physical configuration, alumina
•
deposits or degraded protective ceramic and gaskets.
Fumes limit thermostat and combustion unit: replace only after having identi-
•
fied the cause of the problem and made sure that it is not due to the heat ex-
changer overheating. If you replace it, track the new component.
Inspect the condensate siphon via the plug at its base, and remove any foreign
1.
substances.
Check the load pressure of the machine’s internal circuit with the pressure gau-
2.
ge inside the module and add a glycol/water solution if necessary (see paragra-
phs 4.6 FILLING THE SYSTEM CIRCUIT (APPLIANCE)
→
32 and 4.7 FILLING THE
APPLIANCE’S INTERNAL CIRCUIT
→
33).
Check the preload pressure in the internal expansion tank.
3.
Extraordinary maintenance
The operations described in this paragraph must be carried out as and when
necessary.
Add water and/or antifreeze to the system’s hydraulic circuit and the machine’s
•
internal circuit.
