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 heater. If the heater still does not
(3) Preheating takes place for approximately
operate properly, shut the unit off
one minute, after which time the ignition
and check for the difficulty, following
cycle starts, and the combustion blower
instructions in maintenance and
operates. After approximately another
repair.
minute, the heater will circulate warm air,
and the control box indicator lamp will
b. Stopping. Position the control switch in the OFF
glow to indicate that the heater is
position.
operating properly.
Caution
Note
Do not use the circuit breaker to stop
For one minute after the control
the heater as the system will not
switch is turned on, the heater will
purge when all circuits are open.
give no visible or audible signs of
operation until the preheater element
Note
heats the burner sufficiently to cause
When the control switch is in the
If the control box
OFF position, the heater will
indicator lamp glows 1/2 to 2 minutes
continue to operate through the
after the heater was turned on, the
purge cycle. The indicator lamp will
heater is operating properly. If the
glow for approximately two minutes
indicator lamp does not glow, air
after shutdown, until the heater
may be trapped in the fuel line,
starts to cool.
preventing sufficient fuel from
reaching the heater during the timed
172. Motor-Generator Set
ignition cycle.
This may happen
when the heater is started for the
a. Starting. Connect the 50-foot cable supplied
first time after installation or at the
with the winterization kit or equivalent to the motor-
beginning of the heating season. If
the indicator lamp does not light
generator set receptacle (fig. 71.18) and 115 volt ac
after three minutes, turn the control
electrical source.
switch to OFF AG0 SW7A position.
b. Stopping. Disconnect the cable.
Check the reset button in the control
box. Wait five minutes, then restart
17
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