Premier Ductable Heater
www.lbwhite.com
Owner’s Manual • Premier 40
22
Ignition control
The control sends and receives voltages to operate or
verify operation of components. Refer to the following
and Fig. 19 to understand the ignition control’s terminal
designators if doing voltage checks on the control.
L1:
Main power supply voltage to control.
IND:
Main power supply voltage from control to motor.
LED:
Not used
MV:
24 VAC from ignition control through high limit
switch to gas control valve.
PS2:
24 VAC return from air proving switch back to
ignition control.
PS1:
24 VAC from ignition control to air proving
switch.
W:
24 VAC from transformer to igntion control. (without
this voltage from the transformer, the ignition
control will not function.
FS:
No terminal.
R:
No terminal.
X:
No terminal
C/COM:
Earth ground for transformer and ignition
control.
Also refer to “Operation Sequence” within this manual
as needed to understand operation of the ignition
control during a call for heat.
FIG. 19
Transformer
The transformer reduces main power supply voltage
to 24 VAC for operation of the the ignition control.
Without 24 VAC from the transformer, the ignition
control will not function, nor will the heater operate.
See Fig. 20 for location of the transformer.
FIG. 20
Transformer Ignition
Control
