Robur GAHP Line AR Series, Installation, Use And Maintenance Manual

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First start-up and maintenance section
Ed. 2014-08
73
5.2 MAINTENANCE
Correct maintenance prevents problems, guarantees maximum operating efficiency of the
appliance and allows running costs to be reduced.
Before carrying out any operation on the appliance, switch it off via the appropriate
on/off commands (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 via the
external disconnecting switch (GS) and the gas valve.
Caution: Label all wires prior to disconnection when servicing controls. Wiring
errors can cause improper and dangerous operation.
Verify proper operation after servicing.
Any operation that regards internal components of units of the appliance must be
carried out by and 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
continuous operation), these maintenance operations must be performed more often.
Maintenance operations that may be performed by the user:
•
Cleaning the finned coil.
If the installation environment is particularly dusty, it is advisable to fit a filter for the
finned coil – see the "Optionals and Spare Parts” section, on page 79.
You will need : the appliance disconnected from gas and electricity supply
- with a brush, remove any dust and dirt that has accumulated on the outside of the
finned coil, taking care not to damage the fins;
- check that all dirt has been removed;
- restore the supply of gas and electricity to the appliance: open the gas supply valve
and put the external disconnecting switch (GS) in the "ON" position;
- start the appliance by means of the on/off operation commands (or via DDC, if
connected and in controller mode).
Maintenance operations that the user may NOT carry out
(operations to be performed by a Robur TAC).
•
Checking that the combustion circuit is fully functional:
- inspect and clean flue gas passage (see after);
- cleaning of the burner (see after)
- checking the ignition and flame detector system.