Series AA250
Page 13
LT252 Oct 2019
LIGHTING AND SHUTDOWN INSTRUCTIONS
Start-Up Instructions
Follow steps 1-6 on initial start-up after heater installation by a qualified gas heater service person. For normal
start-up, simply turn thermostat above room temperature. The heater will start.
1. Open all manual fuel supply valves and check for gas leaks using approved leak detectors.
2. Check the heater is receiving 115 VAC from the electrical supply.
3. Set the thermostat to desired room temperature.
4. This heater includes a direct ignition control module for purposes of controlling the timing of the ignition
process of the heater as well as monitoring of the safety functions. The module is contained within the
control enclosure.
A red LED light on the module indicates the stats of the heater. The LED is visible external of the control
enclosure through the sight glass.
A constant light from the LED is an indicator that the heater is functioning correctly. Any flash pattern is
indicative that there is a problem in the operation of the heater. Refer to the troubleshooting decal on the
inside of the front door for assistance in troubleshooting. Only qualified and properly trained personnel shall
service or repair the heater.
5. On a call for heat, the motor will start up and run for 30 seconds. This pre-purge is a safety feature and
normal operational characteristic prior to ignition taking place. After 30 seconds, the igniter should spark
with ignition occurring. It is normal for air to be trapped in the gas hose on new installations. The heater
may attempt more than one trial for ignition before the air is finally purged from the line and ignition takes
place.
6. The ignition control will make up to three trials for ignition. Each trial takes approximately 15 seconds. The
first three trials occur within 30 seconds if ignition is not achieved. After three trials, the module will lockout
for a period of approximately 1 hour or until reset. (Reset is accomplished by removing power from the
module for at least 5 seconds.) After this 1-hour period, the module re-attempts the full ignition sequence.
Shut-Down Procedure
To shut down the heater for cleaning, maintenance, or repair, follow steps 1-4. Otherwise, turn the thermostat to
OFF or no heat for standard shut down.
1. Close all manual fuel supply valves
2. With the heater lit, allow heater to burn off excess fuel in gas supply hose.
3. Position thermostat to OFF or no heat position.
4. Disconnect heater from the electrical supply.
Содержание AA250 Series
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