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19 Maintenance
19.1 Periodic Check
• Check the following to ensure proper operation of
the Combi Boiler periodically .
• Also check the items of maintenance described in
the Owner's Guide.
[Venting System]
• The venting system must be examined
periodically by a qualified service technician to
check for any leaks or corrosion.
• Do not obstruct the flow of combustion and
ventilation air.
[Burner]
• Check the burner flame periodically for a proper
blue color and consistency.
• If the flame does not appear normal, the burner
may need to be cleaned by a qualified service
technician.
[Pressure relief valve]
• Operate the pressure relief valve once a year to
ensure that it is functioning properly and there is
no obstruction. Turn the power off to the Combi
Boiler before opening the pressure relief valve,
and make sure that water draining out of the
valve will not cause any damage.
• If the pressure relief valve discharges periodically,
it may be due to thermal expansion in a closed
water system. Contact the water supplier or a
local plumbing inspector on how to correct this
situation. Do not plug the pressure relief valve.
[Water filter]
• Check and clean the filter inside of cold inlet
(DHW inlet) connection.
NOTICE
Do not use this appliance if any part has been
under water. Immediately call a qualified
service technician to inspect the appliance and
to replace any part of the control system and
any gas control which has been under water.
80
Maintenance
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