13
valve discharges by itself, a problem exists and
service is required. This could be due to a de-
fective relief valve or to overheating.
Pilot Flame: The pilot flame should burn with
a clean sharp blue flame and should resemble
Fig.4 below. If the flame is yellow, or if the
central button Fig. 2 (P) has to remain de-
pressed for a long time in order to keep the pilot
lighted, the pilot may need to be cleaned or the
orifice replaced.
Fig. 4
Characteristic Pilot Flame
To clean the pilot:Turn off the gas at the unit
Fig. 2 (L). Remove the front panel (unscrew
screws at bottom of corners of front panel, pull
out and lift panel off). Disconnect the Pilot Tube
Fig. 2 (S) at its base and blow gently through it
(
see diagram of Pilot Assembly, page 19). Be
careful not to lose the pilot orifice and
washers. Remove and clean pilot filter by
peeling off the outer layer. Do not use any wire
or sharp object to clean orifices. Natural gas
orifices are large enough that you can usually
clean them by blowing through them. LP orifices
are too small to clean and should be replaced.
Do not enlarge the orifice.
Main Burner Flames: The main burner flames
should be blue, with a more intense blue cone in
the center core.
Compare with Fig 5 in opposite
column. Yellow flames could be a sign of wrong
size gas orifices or dirty burners. If some burn-
ers have yellow flames while others have good
flames, it is likely that dust, lint or spider webs
have partially clogged the burner venturi.
Wash the stainless steel burners if they are dirty.
Burners can be detached from the heater by re-
moving the pilot tube and the thermocouple as-
sembly and disconnecting the Energy-Cut-Off.
(Do not lose the retaining clip) The burners
are secured to the main frame by two screws on
either side. Do not remove the five screws across
the front of the burner assembly. Also examine
heat exchanger fins for dirt. Brush and vacuum if
dirty. Burnt edges at the bottom of the heat ex-
changer shroud are a sign of inadequate air sup-
ply, poor venting or some other combustion prob-
lem. The cause of this situation must be corrected:
contact your installer, service agency or the gas
supplier.
WARNING: Accumulation of dust and lint on
the heat exchanger fins will reduce air flow
and could cause corrosion of the copper
heat exchanger. Keep the appliance area clean
and free from combustible materials, gasoline and
other flammable liquids and vapors. Do not ob-
struct the flow of combustion air and ventilation
air. If installed near a dryer, make sure the dryer
is properly vented, and that the AquaStar vents
properly when the dryer is operating.
Fig 5.
Characteristic Burner Flame Pattern
- to thermocouple
to burners -
