Guardian Agricultural Animal Confinement Building Heaters
Owner’s Manual • Guardian
19
Ignition Control
The control sends and receives voltages to operate or
verify operation of components. Refer to the following
and Fig. 14 to understand the ignition control’s terminal
designators if doing voltage checks on the control.
IND:
220 VAC from control to motor.
L1:
220 VAC power supply to control.
HSI:
220 VAC from control to hot surface igniter.
HSIG:
Neutral return of igniter.
L2:
Neutral of control.
W:
24 VAC input from transformer. (Without this
voltage the ignition control will not function)
PSI:
24 VAC from control to air proving switch.
FSI:
Microamperage from control to flame sensor for
proving presence of burner flame.
GV:
24 VAC from control to high limit and then to gas
control valve.
PSO:
24 VAC return from air proving switch back to
control.
FSG:
Ground of flame sensor.
C:
Ground for control.
Also refer to “Operation Sequence” within this manual
as needed to understand operation of the ignition
control during a call for heat.
FIG. 14
Flapper (Sail) Model
AW325
The flapper, located within the housing at the blower
discharge, works in conjunction with the air proving
switch in proving that proper air flow has been achieved
by the fan and motor before allowing an ignition cycle to
continue.
If the flapper is binding, its arm will not engage the air
proving switch and ignition will not occur.
Ensure the flapper lifts freely, that it does not bind on the
fan housing and that it is free of dust and other debris.
FIG. 15
Transformer
The transformer reduces 220 VAC to 24 VAC for opera
-
tion of the the ignition control. Without 24 VAC from the
transformer, the red diagnostic light will not be on and the
ignition control will not function.
See Fig. 16 for location of the transformer.
FIG. 16
Summary of Contents for AW060
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