47
Maintenance and Service
Turn off the electrical power supply, the manual gas control valve, and the manual water control valve before
servicing.
The unit should be checked once a year or as necessary by a certified and trained technician. If repairs are
needed, the repairs should be done by a certi
ed 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 ensure correct operation
Periodic cleaning of the water strainer.
Remove the thermistor from unit and check for mineral coating - A mineral coating on the thermistor requires
cleaning
Be sure the venting is properly connected to prevent escape of dangerous flue gases which could cause
deadly asphyxiation.
Obstructions could cause improper venting. The combustion and ventilation air
ow must not be obstructed.
Damage or deterioration which could cause improper venting or leakage of combustion byproducts.
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SYSTEMS AND PARTS CHECK
1.
2.
3.
4.
5.
Physical Damage:
If the water heater has been subjected to
re,
ood, or physical damage, turn off the manual
gas shutoff valve and do not operate the water heater again until it has been checked by quali
ed 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.
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●
Clean Up:
The
ue outlet and the air intake hole on the top of the water heater should be checked.
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
ow of combustion air and exhaust air
ow.
Water Strainer:
The water strainer should be checked once a year. It protects valve from dirt and pipe scale.
Self-clean by opening valve or hose connected to a blow-off outlet.
Sediment Build-up:
Unlike a typical storage tank, this heater has a self cleaning system initiated by the
ow of
water. Build up of sediment in faucet aerators, shower heads and screens could impair water
ow 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.
BURNER IGNITION:
Water heater has automatic ignition system. Once you open a hot water tap, the computer
electronically ignites the burners. You can see the burner
ame via
ame inspection hole.
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Clean out of Condensate Trap:
Over time, blockage of the trap by debris may occur, when the condensate
cannot be released, the unit will go into error and will shut down. When this occur, the condensate trap must be
cleaned.
Service & Cleaning Of The Burner:
Only specially trained and authorized personnel are permitted to service
the burner.
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WARNING
!
!
Flame Inspection Hole
Summary of Contents for GU145 Series
Page 5: ...5 Dimensions GU145 S 508 11 12 21 22 1145 S GU195 S M 508 11 12 21 22 1195 S M...
Page 6: ...6 Parts Diagram for Model GU145 S 508 11 12 21 22 1145 S GU195 S M 508 11 12 21 22 1195 S M...
Page 7: ...7 Parts Diagram for Model GU145 S 508 11 12 21 22 1145 S...
Page 53: ...53 Wiring and Connection Diagram Wiring Diagram MODEL GU195 M 508 11 12 21 22 1195 M...
