9
LIGHTING INSTRUCTIONS
1. STOP!Read the safetyinformationabove 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. Fullydepressgasvalvebuttonandlightpilot 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
withpilot burning.Whenthegasvalve buttonisreleased,
the pilot should continue to burn.
- If the gas valve button does not pop up when released,
stopandimmediately call yourservicetechnician 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
valvebutton to theleft,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
TheAquaStar125B LP and 125 BNGwaterheatershave
a gas control that modulates burner input in response to
flow. Itspurposeisto ensurethatthehotwater 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
heaterall the way to theright (clockwise). See Fig 8. This
will produce a temperature rise of approximately 90oF at
flow rates between 0.5 and 2.0 gallons per minute. Given
that average incoming water temperatures are 50oF, this
heater will produce approximately 140oF water at these
flow rates. Turning the dial all the way to the left
(counterclockwise) will produce a temperature rise of
approximately 45oF 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
waterheatersdeliverendlesshot 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
overheatwater andthenmixincold tocoolitoff.Youcannot
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
temperatureof the incomingwater (50°Fis average inthe
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
approximately120°F. Atthis setting, if itisstillnecessary,
one could mix a small amount of cold water in a shower
andhavea comfortable shower at about3gallons/minute.
Duringthecolder months, or in coldclimateareas,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
thenshut offon safety whentheoutlettemperaturereaches
194°F.Forthis type ofapplication,purchasea 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
thefront cover, first removethe incandescent particle tray,
thenpulloffthetemperatureadjustmentknobandunscrew
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
atthe gas andwater valve joint.Checkthat the waterinlet
filter (#28 on Figure 12, page 14) is clean.
Pilot Flame: Thepilotflameshouldburnwith a cleansharp
blue flame and should resemble the diagram in Fig 9. If
the flame is yellow, or if the pilot knob has to remain
depressedfora long timeinorder to keep thepilotlighted,
Fig. 8 - Water Flow Control Knob
