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9
LIGHTING INSTRUCTIONS
1. STOP! Read the safety information above on this plate.
2. The Gas valve must be turned off by sliding the gas
valve button to the far left under the OFF ( ) mark.
3. Wait five (5) minutes to clear out any gas. If you smell
gas, STOP! Follow “B” in the safety information above
on this plate. If you don’t smell gas, go to next step.
4. The pilot burner is located behind the peephole in the
front center of the jacket directly below this instruction
plate.
5. Slide the gas valve button to the right, under the pilot
mark ( ).
6. Fully depress gas valve button and light pilot by pushing
“PILOT IGNITER” button ( ). This step may have to
be repeated.
7. Observe the pilot flame through the peephole. The gas
valve button should be held down at least 10 seconds
with pilot burning. When the gas valve button is released,
the pilot should continue to burn.
- If the gas valve button does not pop up when released,
stop and immediately call your service technician or gas
supplier.
- If pilot does not stay lit, repeat steps 1 through 7.
- If pilot will not stay lit after several tries, slide the gas
valve button to the left, under the OFF ( ) mark and call
service technician or gas supplier.
8. Slide the gas valve button to the right, under the ON
mark ( ). The heater will now fire when water is
drawn at a rate greater than the threshold flow rate.
NOTE: If main burner should fail to ignite, make sure pilot
is burning. If not, repeat lighting steps 1 through 7.
TO TURN OFF GAS TO APPLIANCE
Slide the gas valve button to the far left, under the off ( )
mark and close the gas supply to the heater.
SETTING THE WATER TEMPERATURE
The AquaStar 125 B LP and 125 B NG water heaters have
a gas control that modulates burner input in response to
flow. Its purpose is to ensure that the hot water temperature
will remain steady, although the water flow demand might
vary (down to 1/2 gal/minute). To adjust the temperature
on your AquaStar, turn on a hot water faucet to its
maximum flow. At the water heater, turn the large knob
located beneath the main gas controls on the front of the
heater all the way to the right (clockwise). See Fig 8. This
will produce a temperature rise of approximately 90
o
F at
flow rates between 0.5 and 2.0 gallons per minute. Given
that average incoming water temperatures are 50
o
F, this
heater will produce approximately 140
o
F water at these
flow rates. Turning the dial all the way to the left
(counterclockwise) will produce a temperature rise of
approximately 45
o
F for flow rates between 1.1 and 3.7
gallons per minute. It is safest to select a comfortable
temperature and not have to mix in cold water.
What is the best temperature setting? Because AquaStar
water heaters deliver endless hot water at the temperature
you have selected, there is no need to produce very hot
water and then mix in cold. It just does not make sense to
overheat water and then mix in cold to cool it off. You cannot
run out of hot water with an AquaStar, so set the dial for
the temperature you prefer . Note: 105
°
F is the maximum
recommended for a hot bath. The position you select on
the temperature adjustment knob will depend on the
temperature of the incoming water (50
°
F is average in the
U.S.). In warm weather regions where the incoming cold
water is generally warmer, or during the hot weather
months in some other areas a midway setting on the
temperature adjustment knob would produce a
temperature rise of about 70
°
F, giving an output of
approximately 120
°
F. At this setting, if it is still necessary,
one could mix a small amount of cold water in a shower
and have a comfortable shower at about 3 gallons/minute.
During the colder months, or in cold climate areas, it might
be necessary to set the control to the maximum position,
all the way clockwise to the right.
If you supply the AquaStar 125B, with preheated water
(i.e.) in a solar installation the unit could overheat. It will
then shut off on safety when the outlet temperature reaches
194
°
F. For this type of application, purchase a solar model
125 B LPS or 125 B NGS.
MAINTENANCE AND SERVICE
Approximately once a year, the AquaStar should be
checked, cleaned and serviced as necessary. To remove
the front cover, first remove the incandescent particle tray,
then pull off the temperature adjustment knob and unscrew
and remove the plastic collar. Unscrew the central screw
located at the bottom of the front cover. Pull main cover
out toward you and lift up and out. THE FOLLOWING
OPERATIONS SHOULD BE PERFORMED BY A
QUALIFIED SERVICE PERSON:
Vent System: Should be checked annually. Clean and
repair as needed.
Water Valve (Part # 8707002499): The water valve on
this heater should be serviced periodically The frequency
will depend on the mineral content of the water and
conditions of use or whenever signs of corrosion appear
at the gas and water valve joint. Check that the water inlet
filter (#28 on Figure 12, page 14) is clean.
Pilot Flame: The pilot flame should burn with a clean sharp
blue flame and should resemble the diagram in Fig 9. If
the flame is yellow, or if the pilot knob has to remain
depressed for a long time in order to keep the pilot lighted,
Fig. 8 - Water Flow Control Knob