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Fig. 6 - Water Flow Control Knob
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.). If you plan to supply the AquaStar 38 B, with
preheated water (i.e.) solar installation, the unit could
overheat. It will then shut off on safety when the outlet
temperature reaches 185°F. For a lower temperature rise,
the heater can be set for minimum burner output by sliding
the gas valve control to the pilot setting symbol ( ).
LIGHTING INSTRUCTIONS
1. STOP! Read the safety information on the front panel
of the heater.
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 the lighting
instructions on the front panel of the heater.
5. Slide the gas valve button to the right, to the pilot position
( ).
6. Fully depress gas valve button ( )and light pilot by
pressing hard on 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. When the pilot remains on, slide the gas valve button to
the right, to the ON ( ) position. The heater will now
fire when water is drawn at a rate of 1/2 gallon or more
per minute.
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 heaters individual shut-off
valve.
SETTING THE WATER TEMPERATURE
To adjust the temperature on your AquaStar, turn on a hot
water faucet to its maximum flow. At the water heater,
turn the large temperature adjustment knob located
beneath the main gas controls on the front of the heater
all the way to the right (clockwise). See Fig 6. This will
produce a temperature rise of approximately 90
o
F at a
flow rate of .5 gallons per minute (gpm). Turning the dial
all the way to the left (counterclockwise) will increase the
water flowing through the heater, and will produce a
temperature rise of approximately 45
o
F at a flow rate of
1.3 gpm. Given that average incoming water temperatures
are 50
o
F, this heater will produce water between 140
o
and 95
o
at these flow rates. Thus one can obtain a higher
flow rate, but at cooler temperatures.