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Fig. 10—VR8345 wiring connections in direct spark ignition system (single rod application).
Startup and Checkout
WARNING
FIRE OR EXPLOSION HAZARD
CAN CAUSE PROPERTY DAMAGE,
SEVERE INJURY, OR DEATH
1. Do not force the gas control knob. Use only your
hand to turn the gas knob. Never use any tools.
2. If the gas control knob will not operate by hand,
call a qualified service technician to replace the
gas control.
GAS CONTROL KNOB SETTINGS
The gas control knob operates differently in intermittent
pilot, hot surface and direct spark ignition systems.
The gas control knob settings for an intermittent pilot
system are as follows:
OFF: Prevents pilot and main burner gas flow.
ON: Permits gas to flow into the control body. Under
control of the thermostat and intermittent pilot mod-
ule, gas can flow to the pilot and main burner.
2
S87 CONTROL MODULE
ALARM
24V (GND)
VALVE
VALVE
24V
4
IGNITER-SENSOR AND
BURNER GROUND
TEMPERATURE
CONTROLLER
3
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD
PROTECTION AS REQUIRED.
2
ALTERNATE LIMIT CONTROLLER LOCATION.
3
MAXIMUM IGNITER-SENSOR CABLE LENGTH: 3 ft [.9 m] OR LESS.
4
3A REPLACEABLE FUSE.
ALARM TERMINAL PROVIDED ON SOME MODELS.
5
ALARM, IF USED
5
GND
Q347 IGNITER-SENSOR
BURNER
The gas control knob settings for hot surface or direct
spark ignition systems are as follows:
OFF: Prevents main burner gas flow.
ON: Permits main burner gas flow. Under control of the
thermostat and ignition module, gas can flow to the
main burner.
NOTE: Gas controls are shipped with the gas control knob in
the ON position.
PERFORM GAS LEAK TEST
WARNING
FIRE OR EXPLOSION HAZARD
CAN CAUSE PROPERTY DAMAGE,
SEVERE INJURY, OR DEATH
Check for gas leaks with a rich soap and water
solution anytime work is done on a gas control.
9
L1
(HOT)
L2
1
DSI WIRE
ADAPTER
MV
VR8345
COMBINATION
MV
GAS CONTROL
QUICK
CONNECTS
M8438
69-0844—1
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