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LDAP-IOM (01-22) 207733-A
OPERATION—CONTINUED
Startup
Startup the heater as follows:
1 . Set thermostat at lowest setting .
2 . Turn OFF all electric power to appliance .
NOTE: This appliance is equipped with an ignition device that automatically lights the burner. Do
not try to light the burner by hand.
3 . Open access door and locate gas control (ON/OFF) knob or switch on gas valve (see
) .
Figure 16. Gas Valve ON/OFF Control
4 . Turn gas control switch to OFF or turn knob clockwise to OFF .
5 . Wait 5 minutes to clear out any gas and then smell for gas (including near floor) .
a . If you smell gas, STOP! and follow steps in DANGER message listed above or on heater operating label .
b . If you do not smell gas, proceed to step 6 .
6 . Turn gas control knob(s) counterclockwise to ON .
7 . Close access door .
8 . Turn ON electric power to heater .
9 . Set thermostat to desired setting .
a . If heater does not operate, follow instructions in step 13 or on heater operating label and call your service
technician .
b . If heater operates, thermostat calls for heat, which energizes venter motor .
10 . Pressure switches close, which fires unit .
11 . Burner flame is sensed and in 30 seconds after gas valve is energized, fan motor(s) is energized .
Top View
Side View
Gas Control
Knob
(shown in the
ON position)
Gas
Flow
Gas
Flow
