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TABLE 5—MAXIMUM LENGTH OF SUPPLEMENTARY LIMIT LEADWIRES
Thermocouple
Length
inches
meters
18
0.5
24
0.6
30
0.8
36
0.9
48
1.2
60
1.5
TABLE 6—MAXIMUM LENGTH OF SUPPLEMENTARY LIMIT LEADWIRES
Thermocouple
Length
inches
meters
12
0.3
18
0.5
24
0.6
30
0.8
36
0.9
40
1.0
48
1.2
60
1.5
!
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 will 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.
WHEN USING Q340A THERMOCOUPLE.
Maximum Leadwire Length x 2 (wires)
Awg No. 14
inches
meters
35
0.9
29
0.7
23
0.6
17
0.4
DO NOT USE.
WHEN USING Q309A THERMOCOUPLE.
Maximum Leadwire Length x 2 (wires)
Awg No. 14
inches
meters
47
1.2
41
1.0
35
0.9
29
0.8
23
0.6
19
0.5
11
0.3
9
INSTALLATION • STARTUP AND CHECKOUT
Awg No. 16
inches
meters
22
0.6
18
0.5
15
0.4
11
0.3
Awg No. 16
inches
meters
30
0.8
26
0.7
22
0.6
18
0.5
15
0.4
12
0.3
7
0.2
DO NOT USE.
Startup and Checkout
ON: Permits main burner and pilot gas flow. Thermostat
and gas control control 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 all pipe connections upstream of the gas control
with a rich soap and water solution. Bubbles indicate a gas
leak.
VR8200, VR4200
Awg No. 18
inches
meters
13
0.3
11
0.3
9
0.2
6
0.2
Awg No. 18
inches
meters
18
0.5
16
0.4
14
0.4
11
0.3
9
0.2
7
0.2
68-0046—4
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