Garland AIR-DECK GAS BAKE AND PIZZA OVENS - Manuel (Page 15)

Part # 1382670 (12/07) Page 15
THERMOSTAT (CONTROLLER)
CALLS FOR HEAT
1
SAFE-START CHECK
MUST NOT BE ANY FLAME OR
FLAME SIMULATING CONDITION
SPARK GENERATOR POWERED
FIRST VALVE (PILOT)
OPERATOR OPENS
2
POWER INTERRUPTION
SYSTEM SHUTS OFF, RESTARTS WHEN
POWER IS RESTORED.
PILOT FLAME FAILURE
SECOND MAIL OPERATOR CLOSES,
S86 STARTS TRAIL FOR IGNITION
3
IF FLAME OR FLAME SIMULATION
CONDITION PRESENT SYSTEM
FAILS TO START
4
PILOT BURNER LIGHTS
S86 SENSES FLAME CURRENT
PILOT BURNER OPERATION
OR
PILOT BURNER DOES NOT LIGHT
S86A OR B - TRIAL FOR IGNITION
CONTINUES, S86C OR D - GOES
INTO LOCKOUT AFTER TRIAL FOR
IGNITION TIMES OUT.
IF FLAME CURRENT SENSED
SPARK GENERATOR OFF.
SECOND VALVE OPERATOR
(MAIN) OPENS
5
6 MAIN BURNER OPERATION
S86 MONITORS PILOT FLAME
CURRENT
7 THERMOSTAT (CONTROLLER)
SATISFIED - VALVES CLOSED
PILOT AND MAIN BURNERS
ARE OFF.
START
STAGE 1
TRAIL FOR
IGNITION
STAGE 2
MAIN
BURNER
OPERATION
END
SEQUENCE OF OPERATION
INTERMITTENT PILOT INSTRUCTIONS Continued