22
maintenance
Instructions for opening the casing and performing
an internal inspection
Before performing any work on the appliance, remove
the batteries and close the gas valve.
To access the inside of the appliance, you need to:
- Remove the knob 19
- Remove the three screws D
- Fit the casing to the frame using the hooks E
E
L
19
L
L
Maintenance is an essential part of the safe and effi cient
operation of the appliance and ensures its durability. It
should be performed according to the instructions given
in current legislation.
Before beginning maintenance work:
- Remove the batteries
- Close the gas valve and the domestic hot water
system valve.
After the work has been completed the initial settings
will be restored.
General comments
It is recommended that the following inspections be
carried out on the appliance at least once a year:
1. Visually check the overall condition of the appliance.
2. Check the seals in the water part and, if necessary,
replace the gaskets and restore the seal to perfect
working order.
3. Check the seals in the gas part and, if necessary,
replace the gaskets and restore the seal to perfect
working order.
4. Visually check the combustion and, if necessary,
disassemble and clean the burner.
5. Following the inspection detailed in point “3”,
disassemble and clean the combustion chamber, if
necessary.
6. Following the inspection detailed in point “4”,
disassemble and clean the burner and injector,
if necessary. Remove oxide from the detection
electrode using an emery cloth.
7. Cleaning the primary heat exchanger
8. Make sure the following safety devices are operating
correctly:
- temperature limit safety device.
- fl ue gas safety
9. Make sure that the following gas part safety devices
are operating correctly:
- absence of gas or fl ame safety device (ionisation).
10. Check the effi ciency of
the domestic hot water
production process (test the fl ow rate and
temperature).
11. Cleaning the fi lter in cold water inlet.
WARNING! THE APPLIANCE MUST NOT BE
PUT IN FUNCTION WITHOUT FILTER.
12. Perform a general inspection of the aplliance
operation.
WARNING!!
Never tamper with or decommission the fl ue gas
sensor. This could affect the proper operation of
the appliance.
Poor draught conditions could cause exhaust gas
backfl ow into the installation room.
Hazard of carbon monoxide intoxication.
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