VR8300 CONTINUOUS PILOT COMBINATION GAS CONTROL
69-0668—05
6
Table 7. Maximum Length of Supplementary Limit Leadwires in in. (m) When Using Q390/Q340 Thermocouple.
START-UP 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 push down the reset button or turn
the gas control knob. Never use any tools.
2. If the gas control knob or reset button does not
operate by hand, or if the reset button stays
depressed after it is released, the gas control
should be replaced by a qualified service
technician.
Gas Control Knob Settings
The gas control knob has three settings:
OFF: prevents pilot and main burner gas flow.
PILOT: permits pilot gas flow only. Gas control
knob must be held depressed or thermocouple
must be heated sufficiently to hold the safety
control valve open.
ON: permits main burner and pilot gas flow. Gas
control and thermostat controls the main
burner gas flow.
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 rich soap and water
solution any time work is done on a gas control.
Gas Leak Test
1.
Paint the pipe connections upstream of the gas
control with a rich soap and water solution. Bub-
bles indicate a gas leak.
2.
If a leak is detected, tighten the pipe connection.
3.
Stand clear while lighting the main burner to pre-
vent injury caused from hidden gas leaks that
could cause flashback in the appliance vestibule.
Light the main burner.
4.
With the main burner in operation, paint pipe joints
(including adapters) and gas control inlet and out-
let with rich soap and water solution.
5.
If another leak is detected, tighten the adapter
screws, joints, and pipe connections.
6.
Replace the part if gas leak cannot be stopped.
Light Pilot Burner Flame
1.
Turn the gas control knob clockwise
to OFF.
Wait five minutes to dissipate any unburned gas.
Sniff around the appliance near the floor. Do not
relight the pilot flame if you smell gas.
2.
Turn the gas control knob counterclockwise
to PILOT. Push down and hold the gas control knob
while lighting the pilot flame.
3.
Hold the gas control knob down about one minute,
then release.
a. If the pilot flame goes out, turn the gas control
knob clockwise
to OFF and repeat steps
1 through 3.
b. If pilot flame remains lit, turn the gas control
knob counterclockwise
to ON.
Adjust Pilot Burner Flame
The pilot flame should envelop 3/8 to 1/2 in. (10 to 13
mm) of the thermocouple tip. See Fig. 10.
To adjust the pilot flame:
1.
Remove the pilot adjustment cover screw. See
2.
Turn the inner adjustment screw clockwise
to decrease or counterclockwise
to increase
the pilot flame.
3.
Always replace the cover screw after adjustment
and tighten firmly to ensure proper operation.
Fig. 10. Proper flame adjustment.
Light Main Burner
Follow the appliance manufacturer instructions or set the
thermostat setpoint 10°F (6°C) above the room
temperature to call for heat.
Thermocouple Length
Maximum Leadwire Length x 2 (Wires)
AWG No. 14
AWG No. 16
AWG No. 18
in.
in.
in.
in.
in.
in.
in.
in.
12
0.3
47
1.2
30
0.8
18
0.5
18
0.5
41
1.0
26
0.7
16
0.4
24
0.6
35
0.6
22
0.6
14
0.4
30
0.8
29
0.8
18
0.5
11
0.3
36
0.9
23
0.6
15
0.4
9
0.2
40
1.0
19
0.5
12
0.3
7
0.2
48
1.2
11
0.3
7
0.2
60
1.5
DO NOT USE
M3086C
PROPER FLAME
ADJUSTMENT
3/8 TO 1/2 IN.
(10 TO 13 MM)
THERMOCOUPLE
