L.B. White AD100 - Manual (Page 17)

The controller is diagnostic and will identify ignition
problems by the flash sequence of the red light (LED)
connected to the controller. Count the number of
times the red light flashes, and then refer to the
troubleshooting flow charts in this manual or the
troubleshooting label on the heater.
The controller will safely shut the heater down if a
problem occurs. The ignition control must be reset to
restart the heater. Turn the heater OFF and then ON.
If replacing, carefully remove the individual wires and
ignition cable from the controller.
The ignition controller does not have any serviceable
componets. If the controller is defective, it must be
replaced. Do not attempt to repair.
FIG. 18
IGNITION CONTROLLER
The transformer reduces 115 VAC to 24 VAC for
operation 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.19 for location of the transformer and output
terminal reference.
FIG. 19
TRANSFORMER
24 VAC
OUTPUT
1. Remove the following in the order given:
-- Gas hose and sediment trap from the inlet of gas
the control valve.
-- Two screws at the inlet of the gas control valve
securing the valve to the case. See Fig.20,
AD100 shown.
-- Bolt with washer securing the manifold to the
burner and base. See Fig.21.
2. Lift and pivot the gas valve with manifold as needed
to so burner orifice clears the venturis of the burner.
See Fig.22. (AD100 shown)
3. Replace components as needed.
FIG. 20
FIG. 21
FIG. 22
GAS CONTROL VALVE AND BURNER ORIFICE
SCREWS
BOLT AND WASHER
(UNDERSIDE OF BASE)
ORIFICE
VALVE
16