9
MODEL 2730C
SEQUENCE OF COMPONENT OPERATION
1)
POWER SUPPLY
240/480 Volt wire directly into the fused disconnect.
2)
FUSE DISCONNECT SWITCH
Turned on, it sends power to motor relay and to control voltage transformer.
3)
CONTROL VOLTAGE TRANSFORMER
Sends power to the 3 amp circuit breaker.
4)
3 AMP CIRCUIT BREAKER
Sends power to the fan switch.
5)
FAN SWITCH
Sends power to the motor relay holding coil.
6)
MOTOR RELAY
Closes, the fan motor starts, there is power at the burner switch.
7)
BURNER SWITCH
In the ON position it sends power to the air flow switch.
8)
AIR FLOW SWITCH
It was blown closed by the fan turning, sends power to the ignition control board.
9)
IGNITION CONTROL BOARD
Creates a spark at the igniter and sends power to the high limit switch.
10)
HIGH LIMIT SWITCH
Sends power to the gas solenoid valve.
11)
GAS SOLENOID VALVE
Opens, sending fuel to the burner (where there is spark).
12)
BURNER
It ignites.
13)
IGNITER SENSOR
Sends a flame sensing signal to the ignition control board. The unit is operating.
Summary of Contents for 2730C
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Page 15: ...15 240 Volt 1 PH ...
