Ignition Control - L.B. White Guardian AD060 Owner's Manual And Instructions

Gas Control Valve and
Burner Orifice
1. Remove the following in the order given:
-- Gas hose and sediment trap from the inlet of gas the
control valve.
-- AD250: Plastic bushing at gas inlet hole.
See Fig. 16.
-- Two screws at the inlet of the gas control valve
securing the valve to its mounting bracket or to the
case. See Fig. 16.
-- Bolt with washer securing the manifold to the burner
and base. See Fig. 17.
2. Lift and pivot the gas valve with manifold as needed so
3. Replace components as needed.
FIG. 16
SCREWS AT VALVE
INLET
FIG. 17
BOLT AND WASHER
(UNDERSIDE OF BASE)
FIG. 18
VALVE
ORIFICE
Guardian Brood Heaters

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: 220 VAC to control from power supply
IND: 220 VAC from control to fan motor
LED: Connection for control's diagnostic light
MV: 24 VAC from control to high limit switch and
then to gas control valve.
PS2: 24 VAC from air proving switch back to
control
PS1: 24 VAC from control to air proving switch
W: 24 VAC from transformer to control
(without this voltage the ignition control will
not function)
FS:
R: No terminal
X: No terminal
C/COM: Control and burner ground
Also refer to "Operation Sequence" within this
manual as needed to understand operation of the
ignition control during a call for heat.
FIG. 19
Owner's Manual • Guardian
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