Maintenance and Service
10
SYSTEMS AND PARTS CHECK
The unit should be checked once a year or as neces-
sary by a certified and trained technician. If repairs are
needed, the repairs should be done by a certified and
trained technician.
The following systems and parts should be checked at
least once a year.
Venting system
Burner
Manual operation of the pressure relief valve to en-
sure correct operation.
Periodic cleaning of the water strainer.
Remove the thermistor from heat exchanger and
check for mineral coating. A mineral coating on the
thermistor requires cleaning.
WARNING
!!
Turn off the electrical power supply, the manual
gas control valve, and the manual water control
valve before servicing.
CAUTION
! !
Avoid contact with hot water released from
the relief valve.
NO LUBRICATION: No lubrication is required for
the water heater.
Service & Cleaning Of The Burner: Only specially
trained and authorized personnel are permitted to ser-
vice the burner.
Maintenance and Service
BURNER IGNITION: Water heater has automatic ig-
nition system. Once you open a hot water tap, the
computer electronically ignites the burners. You can
see the burner flame via flame inspection hole.
Flame Inspection
Hole
3.
4.
1.
2.
Sediment Build-up: Unlike a typical storage tank,
this heater has a self cleaning system initiated
by the flow of water. Build up of sediment in faucet
aerators, shower heads and screens could impair
water flow and cause the water heater to deliver
less than its full output, or to shut down completely.
Check any of these screens or shower heads on
your faucets periodically and clean as necessary.
Physical Damage: If the water heater has been sub-
jected to fire, flood, or physical damage, turn off the
manual gas shutoff valve and do not operate the wa-
ter heater again until it has been checked by quali-
fied personnel.
Temperature Setting: Hotter water increases the
risk of scalding injury.
Venting System Inspection: A visual inspection
should be made on the venting system at least once
a year.
_
_
Be sure the venting is properly connected to pre-
vent escape of dangerous flue gases which could
cause deadly asphyxiation.
Obstructions could cause improper venting. The
combustion and ventilation air flow must not be
ob-structed.
Damage or deterioration which could cause im-
proper venting or leakage of combustion
byproducts.
_
5.
Clean Up: The flue outlet and the air intake holes on
the bottom sides of the water heater should be checked
frequently. Clean as needed to prevent the entry of
water, insects, rodents or other foreign materials such
as fallen leaves and dust that could cause blockages.
Do not obstruct the flow of combustion air and ex-
haust air flow.
Water Strainer: The water strainer should be
checked at least once a year. It protects valve from
dirt, and pipe scale. Self-clean by opening valve
or plug connected to a blow-off outlet.
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