Burner Manual

NG & LPG Heaters • Rev. 4/13/2016
13
BURNER MAINTENANCE
WARNING: Repair of the burner is to be done by authorized and trained burner
professionals only.
Due to periodic condensation dripping down onto the burner a scale build up may eventually
occur in the burner jet orifices.
BURNER REMOVAL
Shut off the gas supply line to the water heater. Disconnect ¾ pipe union in burner valve train.
Remove the two burner retaining nuts. Turn gas cock knob on combination gas valve to “Off”
position. Remove Boiler Assembly from frame.
TO CLEAN BURNER JETS
Select proper size drill for type of gas involved (see SPECIFICATIONS). Hand turn jet drill to
clean burner. Air blow scale from around the burner jets.
CAUTION: Ensure jet orifices are not changed, as this will change efficiency and safe operation
of heater.
DESCALING HEATER COIL
If heater coils develop excessive scale buildup they should be acidized to remove the scale.
Excessive scale in heater coils will reduce efficiency of the unit and affect recovery capacity.
DESCALING PROCEDURE
WARNING: Coil Descaling is to be done by qualified personnel only.
The best way to acidize the coil is with a circulation pump capable of handling acids:
1. Fill a plastic container with a suitable acid diluted with water to desired strength.
2. Connect the discharge from the circulating pump to the hot water outlet on the water heater
with a suitable hose. Connect the inlet of the circulating pump to the acid container with suction
hose from the pump module and use it as a return hose to the acid container. As the acid
dissolves the scale it becomes neutralized, so about every five minutes add more acid to the
container until all the scale has been removed from the coil. Flush out coil thoroughly with water
after descaling.