◊
When this speed is attained the signal is sent from terminal 2 of connector
X2 on the Steam Power Burner and Fan Control (U21) to terminal 9 of
connector X24 on the Gas Board (A20)
•
A request for heat is sent from terminal 3 of connector X21 on the Gas Board
(A20) to terminal 10 on connector X1 on the Steam Burner Control Module
(N21)
◊
24 VAC is sent from terminal 2 of connector X2 on the Steam Burner
Control Module (N21) to the hot surface igniter (R20).
◊
The gas valve is energized allowing gas and air into the burner chamber to
be ignited by the hot surface igniter.
◊
The Steam Burner Control Module (N21) senses at least 1.5 micro amps
DC from the flame sensor (P1) at terminal 3 of connector X2 and sends a
signal from terminal 2 of connector X1 to terminal 11 of connector X25
on the Gas Board (A20)
e
After the bypass probe (B5) is satisfied then the hot air heat circuit is energized to
increase the cabinet temperature to the setting.
•
A signal is sent from terminal 2 of connector X24 on the Gas Board (A20) to
terminal 4 of connector X2 on the Hot Air Power Burner and Fan Control
(U20) selecting the set speed of the combustion blower.
◊
When this speed is attained the signal is sent from terminal 2 of connector
X2 on the Hot Air Power Burner and Fan Control (U20) to terminal 3 of
connector X24 on the Gas Board (A20)
•
A request for heat is sent from terminal 3 of connector X20 on the Gas Board
(A20) to terminal 10 on connector X1 on the Hot Air Control Module (N20)
◊
24 VAC is sent from terminal 2 of connector X2 on the Hot Air Control
Module (N20) to the hot surface igniter (R20).
◊
The gas valve is energized allowing gas and air into the burner chamber to
be ignited by the hot surface igniter.
◊
The Hot Air Burner Control Module (N20) senses at least 1.5 micro amps
DC from the flame sensor (P1) at terminal 3 of connector X2 and sends a
signal from terminal 2 of connector X1 to terminal 10 of connector X25
on the Gas Board (A20
•
The heat circuit will remain energized until the cabinet set temperature is
reached
•
If the bypass probe (B5) drops below the set level the steam heat circuit will
start again.
f
When the condensate box is heated to 140 degrees F at the B3probe, 120 VAC is
sent from terminal 5 of connector X12 to the condenser valve (Y1) until the
temperature drops.
g
If the “Crisp and Tasty” mode is selected
•
120 VAC is sent from terminal 6 of connector X12 on the Control Board
(A10) to the Dehumidification Valve (Y2) to pull the humidity out of the
cabinet down the drain.
◊
In the light and medium modes (one and two drops in the display) the Y2
valve will be energized until the bypass probe (B5) is satisfied.
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