Installation / Operation Instruction Manual

41
Maintenance and service
RTG-K-199/160N/X2 – 6 720 813 642 (2022/06)
Table 21
7.1 Required annual maintenance
(To remove front cover, see page 13)
Venting System
• Venting system - before removing the front cover inspect
vent opening in the front cover for any blockage or
restriction.
• Observe burner flames during heater operation (front
cover must be removed). Burner flames should be steady
and blue. Yellow, inconsistent (bouncing) flames may be an
indication of poor ventilation or combustion air intake
restriction. Inspect combustion air openings for blockage
or debris.
Combustion Chamber
• Inspect burner observation window for cracks or spillage of
flue gases. Observe burner flames during heater operation.
Flames should be steady and blue with no signs of
yellowing. Yellow burner flames are an indication of
improper combustion. Refer to Section 4.5.1 of this
manual to verify the combustion air supply meets the
manufacturer's specifications.
Pressure Relief
• Manually open the pressure relief valve to ensure proper
operation.
Inlet Water Filter
• Verify the inlet water filter screen is clean and undamaged.
The inlet water filter is located on the bottom of the
appliance, to the right of the cold water inlet fitting. (See
Fig. 13, page 22). Close the installer supplied water
shutoff valve, purge the water using discharge drains and
remove wireform spring clip from filter. Remove the filter,
clean and/or replace if damaged.
Descaling
• In areas where the water supply has a high mineral content
(see table 11, Water Quality), the heat exchanger should
be flushed with a descaling solution. Scale build up will
shorten the life of the water heater, and damage resulting
from scale is not covered under warranty. Refer to
section 7.3 for detailed instructions on descaling the heat
exchanger.
Condensate Siphon
• Check for debris and clean if needed.
Air Filter
• Verify the air filter is clean and undamaged. The air filter is
attached to the fan assembly, see fig. 42.
• Air filter must be cleaned
1)
or replaced in case it is clogged
or damaged.
How to remove air filter
▶ Disconnect the electrical supply from the water heater.
▶ Remove appliance front cover, see page 13.
▶ Remove cover from the air filter.
▶ Loosen two philips head screws.
▶ Remove air filter from the fan.
Fig. 42 Replace air filter
NOTICE:
Appliance malfunction!
▶ Air filter should not be removed during appliance normal
operation as, over time, it will lead to the burner blockage,
requiring expensive repair.
7.2 Winterizing for seasonal use
The water heater must not be installed in a location where it
may be exposed to freezing temperatures unless connected to
electrical power. All water must be drained from the heater in
order to avoid damage to the unit from exposure to freezing
temperatures.
2) Proceed with heat exchanger descaling whenever error
codes AA and E5 are displayed (appliance is protected
against over heating in case of scaling, see table 11, Water
Quality).
1) We do not recommend to wash the filter, gently shake it
against a flat surface to remove the dust. A soft brush may
also be used to aid cleanning.