Filter
Top Products
14
gas pressure. Excessive pressure will lock it up.
This problem usually happens if the gas pressure
between the gas tank and the water heater has
not been reduced. See page 3 of your manual
for specified gas pressures.
To unjam a regulator, remove the nickel size screw
plug on the front. Inside you will see another large
screw. Draw a line down the threads to mark the
location of the screw. Remove the screw and push
on the bottom of the hole with the eraser side of a
pencil or similar object. This will release the dia-
phragm. Reinsert the screw and screw it down
to the end of the mark you made.
3. Pilot orifice cloggged and/or air screen
dirty, or pilot filter is dirty.
Clean the pilot orifice and/or pilot filter screen.
Disconnect the pilot tube (T) by unscrewing it. Be
careful not to misplace the small washers. The
diagram on page 19 shows how the parts of the
pilot assembly fit together.
Natural gas orifices are large enough that you can
usually clean them by blowing through them. The
LP orifice is so small that it is best to replace it.
Never try to enlarge the hole, or use a sharp
hard object for cleaning.
The pilot gas filter is made from a layered mate-
rial. If it becomes too dirty, a portion of the filter
can be separated and peeled off. The clean por-
tion should be loosely reinserted into the pilot
burner brass filter chamber. Be careful when re-
installing the pilot burner to aim the burner so that
the smaller right hand pilot flame touches the ther-
mocouple tip.
2. In-line AquaStar gas regulator jammed
(usually with LP gas)
Replace or unjam the regulator. Note: The regu-
lator furnished with the heater is designed for low
PILOT WILL NOT LIGHT
1. No gas to the AquaStar
A. Gas cock on gas line may not be open.
B. AquaStar manual shut off valve at base of
heater is not open. Turn handle to red flame sym-
bol.
Letter references, e.g. "L" in this section refer to
Fig. 2 on page 6.
Introduction: The AquaStar burners are ignited
by a water flow valve. Numerous water related
problems can cause this water valve to malfunc-
tion such as:
1. insufficient water flow volume to activate the
burners at their minimum flow requirement
2. dirt in the water flow valve causing the valve to
malfunction
3. sediment buildup in faucet aerators or shower
heads
4. uneven pressures between cold and hot (with
single lever faucets)
5. plumbing cross-overs
These water related problems can cause the
heater to deliver less than its full output, or to shut
down completely.
SPECIFIC PROBLEMS AND ANSWERS
Note: Problems are stated in upper case, bold
face. Most common causes for the problems fol-
low in order of likelihood of occurence. For most
of the suggested solutions, it will be necessary to
take the front cover of the heater off. To do this,
pull the knobs off and remove the screws at front
bottom corners, then lift and pull the front panel
off. It is also advisable to remove the bottom tray:
pull off the plastic handle of the manual gas valve
and loosen the side panel bottom screws and then
pull the tray down.
TROUBLE SHOOTING
Mineral Scale Buildup:AquaStars, when operated at high temperatures or in hard water areas,
may need periodic descaling. To check the inside of the heat exchanger for scaling, remove the
heat exchanger by first removing the thermostat sensing element (B), page 6. If you note mineral
buildup, flush with a descaling solution. Consult your dealer or call CEC for instructions.