SL11B & S1500 Manual 934-6644 - Page 10
SEQUENCE OF OPERATION
1 Push start button and hold.
2 Motor relay, and control relay #1 close simultaneously.
3 Fan starts.
4 Fan reaches full speed, air switch closes, and white light comes on.
5 Control relay closes.
6 Gas valves energized, and spark is initiated.
7 Flame rod senses a proven flame, and red light comes on.
8 Release start button.
The following instruction (#9) is for Model S1500 only.
9 Set thermostat to desired temperature, heater will cycle from low to high
flame thermostatically.
COMMON INSTALLATION AND
OPERATIONAL PROBLEMS
1 LOW VOLTAGE
This is one of the most common problems and is usually the result of the
supply cord having too small a wire gauge for its length. Low voltage
results in the motor overheating, burnt relay contacts, or a relay that will
not maintain contact.
2 SUPPLY LINE TOO SMALL
3 INSUFFICIENT VAPORIZATION AT SUPPLY
Normally caused by too small size of supply tank.
4 IMPROPER GAS SUPPLY PRESSURE
Usually a result of supply pressure being too high because of improper
or lack of regulation.
5 DIRTY GAS SUPPLY
Dirty gas can cause strainers to plug or form a build-up in the burner
orifice.
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