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MAINTENANCE
Important
Maintenance is an essential part of the safe and efficient operation
of the boiler and ensures its durability. It should be performed
according to the instructions given in current legislation. Perform
combustion analysis regularly in order to check the operating
efficiency of the boiler and to make sure any polluting substances
released are within the boundaries set by current legislation.
Before beginning maintenance work:
- Disconnect the appliance from the electricity supply by turning
the external bipolar switch to the “OFF” position;
- Remove the fuse
- Close the gas isolation 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 boiler at least once a year:
1. Check the seals in the water part and, if necessary, replace the
gaskets and restore the seal to perfect working order.
2. Check the seals in the gas part and, if necessary, replace the
gaskets and restore the seal to perfect working order.
3. Visually check the overall condition of the boiler.
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.
7. Cleaning the primary heat exchanger
8. Make sure the following heating safety devices are operating
correctly:
- temperature limit safety device.
9. Make sure that the following gas part safety devices are
operating correctly:
- absence of gas or flame safety device (ionisation).
10. Perform a general inspection of the boiler operation.
11. Remove oxide from the detection electrode using an emery
cloth.
12. After servicing, complete the relevant Service Interval Record
section of the Benchmark Checklist (page 59).
13. These checks are not exhaustive. Further mechanical, electrical,
condensate and combustion maintenance checks may be
required.
14. Clean and refill the condensate trap
Operational test
After having carried out the maintenance operations, fill the heating
circuit at a pressure of approximately 1.5 bar and release the air from
the system (scaled system only).
- Begin operating the boiler.
- If necessary, release the air from the heating system again.
- Check the settings and make sure all the command, adjustment
and monitoring parts are working correctly.
- Check the flue system is sealed and operating correctly.
Draining procedures
The heating system must be drained using the following procedure:
- Switch off the boiler, make sure the external bipolar switch is in
the OFF position;
- Open the system drain off cock and collect the escaping water in a
container;
- Empty the water from the lowest points of the system (where
applicable).
If the system is to be left inactive in areas where the room
temperature may fall below 0°C during winter, we recommend that
anti-freeze liquid is added to the water in the heating system in
order to avoid the need for repeated draining; when this liquid is
used make sure it is compatible with the stainless steel used for the
bodywork of the boiler.
We recommend the use of anti-freeze products which contain
PROPYLENE GLYCOLS as these inhibit corrosion and that they
are used in conjunction with the anti-scaling and anti-corrosion
function, in the quantities suggested by the manufacturer, at the
mimimum temperature.
Regularly check the pH level of the water/anti-freeze mix in the
boiler circuit and replace it when the value measured is lower than
the limit prescribed by the manufacturer.
DO NOT MIX DIFFERENT TYPES OF ANTI-FREEZE.
The manufacturer will not be held liable for any damage caused by
the appliance or the system due to the use of inappropriate anti-
freeze substances or additives.
WARNING
Before handling, empty all components which may contain hot
water, performing bleeding where necessary.
Descale the components in accordance with the instructions
provided on the safety data leaflet supplied with the product used,
make sure the room is well ventilated, wear protective clothing,
avoid mixing different products, and protect the appliance and
surrounding objects.
Seal all openings used to take a gas pressure reading or to make any
gas adjustments.
Make sure that the nozzle is compatible with the supplied gas.
If a smell of burning is detected or smoke is seen leaking from the
appliance, or there is a smell of gas, disconnect it from the electricity
supply, shut off the gas valve, open the windows and call for
technical assistance.
Cleaning the condensate trap
The trap is accessed by emptying the condensate bowl located in
the bottom section. Wash with water and detergent.
Replace the condensate collection bowl in its housing.
NB: In the event of prolonged use of the appliance, the trap must
be filled before being used again.
A lack of water in the siphon is dangerous and may cause exhaust
gases to be released into the atmosphere.
41


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