Maintenance; General Comments - Ariston CLAS HE R 12 Installation And Servicing Instructions

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.
. 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.
1. After servicing, complete the relevant Service
Interval Record section of the Benchmark
Checklist (page 6).
13. These checks are not exhaustive. Further
mechanical, electrical,
combustion

maintenance

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.
condensate and
checks may be
- 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 atmos-
phere.
maintenance
49