knob (clockwise) until a click is heard from the
step 10)
made.
Fig. # 8069.1
becomes blocked. This is a "Single-use" type fusible
3. Turn pump off and on several times. Heater
The heater is equipped with a thermal cutoff device
water.
pilot flame is interrupted. Pilot flame is automatically lit
NOTE: If heater is installed outside of the limits shown,
abled by an over temperature condition, caused by
new high limit.
a flow switch must be used in place of the pressure
The pilot burner must be manually relighted to place the
volt system), have pilot generators which act as a safety
the pilot burner in case the pilot flame is extinguished.
tion of a properly adjusted pressure switch.
pressure switch cannot be further adjusted or if the
link or thermal fuse, that must be replaced when dis-
The heaters equipped with the standing pilot (milli-
change removal procedure step 1 thru 7 and
2. Remove defective high limit and replace with
Fig. # 8152.0s
heater in operation again. Refer to the lighting instruc-
3. Reverse above procedure to reinstall.
1. Disconnect top portion of unit. (See heat ex-
5' Max.
sage.
5' Max.
switch when mounted and wired adjacent to the heater.
PILOT SAFETY (IID Units) ELECTRIC IGNITION
safety check and opens the main valve only after the
main gas valve within 8/10ths of a second whenever the
HIGH LIMIT REMOVAL
1. With pump and heater on, turn adjustment
Pool or Spa
internal heat exchanger problem, i.e. scale buildup,
HIGH LIMITS
NOTE: An erratic high limit is often characteristic of
In some cases, the flow on the low-speed is insuf-
device to shut off the flow of gas to the main burners and
Heat Exchanger Height
Adjustment Knob
2. Turn adjustment knob (counter clockwise) 1/4
19
ficient to operate the heater. This is apparent when the
tions provided on the heater label.
The heater is equipped with two automatic high
Fig. # 8159.0s
CAUTION: Do not operate the heater without the func-
PRESSURE SWITCH ADJUSTMENT:
U.G. operation. Refer to troubleshooting section.
pump must be run at high speed when heating the
heater makes banging noises. In these cases, the
PILOT SAFETY (Millivolt System)
repeat steps above until proper adjustment is
pilot is proven to be lit.
limits. Set to operate at 135°F and 140°F.
Fig. #9177
to prevent flame roll-out in the event the heat exchanger
Heat Exchanger Height
TWO SPEED PUMPS
gasvalve.
when the device is powered. Unit performs its own
excessive restriction in the heat exchanger flue pas-
turn.
The heater employs a pilot safety which closes the
should shut off immediately. If it does not,
FLAME ROLL-OUT SAFETY SWITCH
<< < [Pag.19] > >>
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