CONVERTING BETWEEN NATURAL
AND LP GAS
WARNING
FIRE OR EXPLOSION HAZARD
CAN CAUSE PROPERTY DAMAGE,
SEVERE INJURY, OR DEATH
1. Do not use a gas control set for natural gas on
LP gas or a gas control set for LP gas on natural
gas.
2. When making conversion, main and pilot
burner orifices MUST be changed to meet
appliance manufacturer specifications.
VR8305 gas controls can be converted from one gas to
another. To convert from natural gas to LP, use the 393691
LP Conversion Kit that is included with the VR8305 Gas
Control. To convert from LP to natural gas, use the 394588
Natural Gas Conversion Kit (order separately). Step-open-
ing gas controls cannot be converted.
To convert control from one gas to another:
1. Turn off main gas supply to the appliance.
2. Remove the regulator cap screw and pressure regu-
lator adjusting screw. See Fig. 1.
2
!
Installation
WHEN INSTALLING THIS PRODUCT…
1. Read these instructions carefully. Failure to follow
them could damage the product or cause a hazardous
condition.
2. Check the ratings given in the instructions and on the
product to ensure the product is suitable for your applica-
tion.
3. Ensure installer is a trained, experienced service
technician.
4. After installation is complete, use these instructions
to check out product operation.
WARNING
FIRE OR EXPLOSION HAZARD
CAN CAUSE PROPERTY DAMAGE,
SEVERE INJURY, OR DEATH
Follow these warnings exactly.
1. Disconnect power supply before wiring to
prevent electrical shock or equipment dam-
age.
2. To avoid dangerous accumulation of fuel gas,
turn off gas supply at the appliance service
valve before starting installation, and perform
Gas Leak Test after completion of installation.
3. Always install sediment trap in gas supply line
to prevent contamination of gas control.
4. Do not force the gas control knob. Use only
your hand to turn the gas control knob. Never
use any tools. If the gas control knob will not
operate by hand, the gas control should be
replaced by a qualified service technician.
Force or attempted repair may result in fire or
explosion.
CAUTION
Never apply a jumper across or short the valve
coil terminals. This may burn out the heat antici-
pator in the thermostat or damage the electronic
direct ignition (DI) module.
IMPORTANT: These gas controls are shipped with pro-
tective seals over inlet and outlet tappings. Do not
remove seals until ready to connect piping.
Follow the appliance manufacturer instructions if avail-
able; otherwise, use the Instructions provided below.
!
Fig. 1—Top view of gas control.
3. Remove the existing spring.
4. Insert the replacement spring with tapered end down.
See Fig. 2.
5. Install the new plastic pressure regulator adjustment
screw so that the top of the screw is flush (level) with the
top of the regulator. Turn the pressure regulator adjustment
screw clockwise six complete turns. This provides a
preliminary pressure setting of about 10.0 in. wc [2.5 kPa]
for LP regulator and 3.5 in. wc [0.9 kPa] for natural gas
regulator.
!
OUTLET
PRESSURE
TAP
INLET
OUTLET
WIRING
TERMINALS (2)
INLET
PRESSURE TAP
PRESSURE REGULATOR
ADJUSTMENT (UNDER
CAP SCREW)
CONVENIENCE
TERMINALS (2)
(OPTIONAL)
PILOT OUTLET
PILOT ADJUSTMENT
(UNDER CAP SCREW)
GAS CONTROL KNOB
M3043A
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