V. Direct
Spark
Ignition
A.
Understanding the Operating System
The direct spark ignition water heater must not only have the correct gas pressure but a
DC
voltage
,
range between
10.5
volts
DC
and
13.5
volts. This voltage should be supplied directly from the battery
or from the "filtered" circuit of a converter. On a call for heat, voltage is applied to the ignitor across
terminals
1
(power) and
6
(ground) of the input connector. A high voltage spark is then generated
from the spark electrode to ground. Simultaneously, the gas valve is energized. At the start of each
heating cycle, there is a
15
second purge followed by a
6.8
second trial for ignition. Sparking ceases
as soon as a constant flame is present. Once the flame is established, sparking will cease and the
"flame rod" will provide flame monitoring for the remainder of the heat cycle. If the flame is
extinguished during the cycle, it will spark automatically in an attempt to re-establish the flame. If
lockout occurs, the valve closes, turning on the red light in the
ONIOFF switch.
SW
WIRING DIAGRAM
Switch
&
Light
Part
#232229
T
12
UDC.
ONLY
IFANY
OF THE ORIGINAL WIRE
AS
SUWLI
ED WITH THE
WTER
HEATER MUST BE REPLACED, IT
MUST
BE
REPLACED WITH
18
G4,105'
C
MAE
OR
ITS EQUIVALENT.
MODULE
10
Plate
"V"
MODEL WIRING DIAGRAM
12
VOLT
DC
-
WIRING
DIAGRAM
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