Lodge Manufacturing GMD1-80N manual VI. Starting the Unit

All installations and services must be performed by qualified service personnel.

VI. STARTING THE UNIT

A. SEQUENCE OF OPERATIONS

AT ANY TIME THE

GAS VALVE IS

NOT ENERGIZED

START

CONTINUOUS SAFE OPERATION CHECK IF FLAME SIMULATION CONDITION PRESENT OR ROLL-OUT SWITCH OPENS, SYSTEM ENERGIZES INDUCER FAN FOR 15 SECONDS AND CIRCULATOR BLOWER AT HEATING SPEED UNTIL SITUATION CORRECTION

START TRIAL FOR IGNITION

THERMOSTAT CALLS FOR HEAT, CONTACTS CLOSE

CONTROL BOARD ENERGIZED,

INDUCER ENERGIZED

PRESSURE SWITCH SENSES ADEQUATE DIFFERENTIAL PRESSURE CONTACTS CLOSE

POWER IS APPLIED TO THE SILICON NITRIDE IGNITOR. IGNITOR WARM-UP IS 20 SECONDS

AFTER IGNITOR WARM-UP,

THE GAS VALVE IS

ENERGIZED TO OPEN

POWER INTERRUPTION

SYSTEM SHUTS OFF,

RESTARTS WHEN POWER IS RESTORED.

FLAME MUST BE	IF FLAME IS NOT
DETECTED WITHIN	DETECTED, THE GAS VALVE
4 SECONDS IF FLAME	IS DE-ENERGIZED, THE
IS DETECTED, THE	IGNITOR IS TURNED OFF AND
DELAY-TO-FAN-ON	THE CONTROL BOARD CONTROL
TIME BEGINS (45 SECONDS)	GOES INTO "RETRY" SEQUENCE

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