62
Maintenance
GB
Technical Data
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 boi
-
ler and to make sure any polluting substances released are within the
boudaries 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;
- Close the gas valve and the central heating and domestic hot
water system valves.
After the work has been completed the initial settings will be resto-
red.
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 ame safety device (ionisation).
10. Check the efficiency of the domestic hot water production
process (test the ow rate and temperature).
11. Perform a general inspection of the boiler operation.
Cleaning the primary exchanger
Cleaning the smoke side
The inside of the primary exchanger is accessed by removing the bur-
ner. Wash with water and detergent using a non-metallic rie-type
brush, rinse with water..
Operational test
After having carried out the maintenance operations, ll the heating
circuit at a pressure of approximately 1.5 bar and release the air from
the system.
Fill the domestic hot water system at the same time.
- 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 ue system is sealed and operating correctly
.
Draining procedures
The heating system must be drained using the following procedure:
- Switch o the boiler, make sure the external bipolar switch is in the
OFF position and shut o the gas valve;
- Loosen the automatic air relief valve;
- Open the system drain o 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.
Draining the domestic hot water system and indirect cylinder
Every time there is a danger of freezing, the domestic hot water
system must be drained as follows:
- Shut o the water mains inlet valve;
- Open all the hot and cold water taps;
- Empty the water from the lowest points of the system (where
applicable).
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 leaet supplied with the product used,
make sure the room is well ventilated, wear protective clothing, avoid
mixing dierent 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 o the gas valve, open the windows and call for technical
assistance.
User information
Inform the user on the appliance’s operating modes. In particular
provide the user with the instruction manual, informing them that it
must be kept near the appliance.
Additionally, inform the user on the tasks required of them:
- To periodically check the appliance’s water pressure,
- To re-establish the pressure and degas the appliance if necessary,
- To adjust the thresholds and the settings devices for correct and
more economical operation of the appliance,
- To have the appliance serviced, as required by the regulations,
- To not modify, under any circumstances, the combustion air supply
and combustion gas settings.
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