resideo VR8300A User manual

INSTALLATION INSTRUCTIONS
69-0668-05
VR8300 Continuous Pilot
Combination Gas Control
APPLICATION
These continuous pilot gas controls are used in gas-
fired appliances with capacities up to 200 cfh at 1 in. wc
pressure drop (5.7 cmh at 0.25 kPa) on natural gas.
Included are a manual valve, safety shutoff, two
automatic operators, and a pressure regulator. See
Table 1 for temperature range and regulator type.
The VR8300 setup for natural gas includes a 393691 LP
Conversion Kit. The kit contains a new cap screw, a
pressure regulator adjustment screw, a tapered spring
and a conversion label. The LP to Natural gas
conversion kit is 394588. Step-opening gas controls
cannot be converted.
Conversion Kits:
Natural to LP conversion kit is 393691. LP to Natural
conversion kit is 394588. Conversion kits contain a
new cap screw, a pressure regulator adjustment
screw, a tapered spring and a conversion label. Step-
opening gas controls cannot be converted.
Body Pattern:
Straight-through body pattern.
Inlet x Outlet Sizes Available:
1/2 x 1/2 in., 1/2 x 3/4 in., and 3/4 x 3/4 in.
Adapters:
Adapters available for 1/2 and 3/4 in. straight and angle
connections. Refer to Table 4.
Electrical Voltage:
Voltage and Frequency: 24 Vac, 50/60 Hz.Current Draw:
0.70A.
Table 1. Temperature Range and Regulatory Type.
Table 2. Capacity
aCapacity based on 1000 Btu/cu ft, 0.64 specific gravity natural gas at 1 in. wc pressure drop (37.3 MJ/cu m, 0.64
specific gravity natural gas at 0.25 kPa pressure drop).
Use conversion factors in Table 3 to convert capacities
for other gases.
Table 3. Gas Capacity Conversion Factors.
Table 4. Flange Part Numbers.
aFlange kits include one flange with attached O-ring
and fan mounting screw.
bDo not use flanges on gas controls with 3/4 inch inlet
and 3/4 inch outlet. On models with
1/2 inch inlet and 3/4 inch outlet, use flanges only on
the 1/2 inch inlet side.
Approvals:
CSA 112395
Model
Number
Ambient Temperature
Range
Regulatory Type°F °C
VR8300A 0° to 175° 18° to 79° Standard-
opening
VR8300M -40° to
175°
-40° to 79° Standard-
opening
Size (Inlet x Outlet)
Capacity at 1 in. wc
Pressure DropaMinimum Regulated
Capacity
Maximum Regulated
Capacity
1/2 in. x 1/2 in. 180 cfh (5.1 cmh) 30 cfh (0.8 cmh) 225 cfh (6.4 cmh)
1/2 in. x 3/4 in. 190 cfh (5.4 cmh) 30 cfh 0.8 cmh) 290 cfh (8.2 cmh)
3/4 in. x 3/4 in. 200 cfh (5.7 cmh) 30 cfh (0.8 cmh) 300 cfh (8.5 cmh)
Gas Specific Gravity
Multiply Listed
Capacity By
Manufactured 0.60 0.516
Mixed 0.70 0.765
Propane 1.53 1.62
Inlet/Outlet
Pipe Size
Flange
Type
Part Number a, b
Without Hex
Wrench
With Hex
Wrench
1/2 in. NPT Elbow 393690-13
3/4 in. NPT Straight 393690-4

VR8300 CONTINUOUS PILOT COMBINATION GAS CONTROL
69-0668—05 2
INSTALLATION
When Installing this Product...
1. Read these instructions carefully. Failure to follow
them could damage the product or cause a hazard-
ous condition.
2. Check the ratings given in the instructions and on
the product to make sure the product is suitable for
your application.
3. Installer must be a trained, experienced service
technician.
4. After installation is complete, check out product
operation as provided in these instructions.
WARNING
Fire or Explosion Hazard.
Can cause property damage, severe injury, or
death.
Follow these warnings exactly:
1.Disconnect power supply before installing or
servicing.
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 installa-
tion.
3. Do not bend pilot tubing within 3” of the gas control
or pilot burner after compression fitting has
been tightened, or gas leakage at the connec-
tion may result.
4. Always install sediment trap in gas supply line to
prevent contamination of gas control.
5. Do not force gas control knob. Force or attempted
repair may result in fire or explosion. Use only
your hand to push down the reset button or
turn the gas control knob. Never use any
tools. If the gas control knob or reset button
does not operate by hand, the gas control
should be replaced by a qualified service
technician.
CAUTION
Equipment Hazard.
Improper installation can burn out thermostat
heat anticipator.
Do not apply a jumper across or short the valve
coils.
IMPORTANT
These gas controls are shipped with protective
seals over inlet and outlet tappings. Do not
remove seals until ready to connect piping.
Follow the appliance manufacturer instructions if
available; otherwise, use the instructions provided below.
Converting Between Natural Gas
and LP Gas
If needed, convert valve 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 the conversion, the main and pilot
burner orifices MUST be changed to meet
the specifications of the appliance manufac-
turer.
Standard or slow-opening gas controls can be converted
from one gas to another. To convert from natural gas to
LP, use the 393691 LP Conversion Kit. To convert from LP
to natural gas, use the 394588 Natural Gas Conversion
Kit. Step-opening gas controls cannot be converted.
To convert the control from one gas to another:
1. Turn off the main gas supply to the appliance.
2. Remove the regulator cap screw and pressure reg-
ulator adjusting screw. See Fig. 1.
3. Remove the existing spring.
4. Insert the replacement spring with the tapered end
down. See Fig. 2.
5. Install the new plastic pressure regulator adjust-
ment screw so that the top of the screw is flush
(level) with the top of the regulator. Turn the pres-
sure regulator adjustment screw clockwise
six complete turns. This provides a preliminary
pressure setting of about 10.0 in. wc (2.5 kPA) for
an LP regulator and a 3.5 in. wc (0.9 kPA) for a nat-
ural gas regulator.
6. Check the regulator setting with a manometer or by
clocking the gas meter after gas control is
installed. See the Startup and Checkout section.
7. Install the new cap screw.
8. Mount the conversion label on the control.
Install the control according to the appliance
manufacturer instructions.
Fig. 1. Top view of gas control.
OUTLET
PRESSURE
TAP
INLET OUTLET
WIRING
TERMINALS (2)
OUTLET
PRESSURE
TAP
PRESSURE REGULATOR
ADJUSTMENT
(UNDER CAP SCREW)
PILOT OUTLET
PILOT ADJUSTMENT
(UNDER CAP SCREW)
GAS
CONTROL
KNOB
RED RESET BUTTON
M16013A
THERMOCOUPLE
CONNECTION
CONVENIENCE
TERMINALS (2)
(OPTIONAL)

VR8300 CONTINUOUS PILOT COMBINATION GAS CONTROL
369-0668—05
Fig. 2. Install conversion kit in regulated gas control.
Install Adapters to Gas Control
If installing adapters on the gas control, mount them as
shown in Fig. 2:
Flanges:
1. Choose the appropriate flange for your application.
2. Remove the seal over the gas control inlet or outlet.
3. Ensure the O-ring is fitted into the groove of the
flange. If the O-ring is not attached or is missing,
do not use the flange.
4. With the O-ring facing the gas control, align the
screw holes on the gas control with the holes in the
flange. Insert and tighten the screws provided with
the flange. See Fig. 3. Tighten the screws to 25 in.
lb of torque to provide a gas-tight seal.
Fig. 3. Install flange to gas control.
Bushings:
1. Remove the seal over the gas control inlet or outlet.
IMPORTANT
On LP installations, use a compound resistant
to LP gas. Do not use Teflon tape.
2. Apply moderate amount of good quality pipe com-
pound to bushing, leaving two end threads bare.
3. Insert bushing in gas control and thread pipe care-
fully into bushing until tight.
Follow the instructions below for piping, installing
control, connecting pilot tubing, thermocouple and
wiring. Make certain the leak test you perform on the
control after completing the installation includes leak
testing the adapters and screws. If you use a wrench on
the valve after flanges are installed, use the wrench only
on the flange, not the control.
USE ADAPTERS TO SOLVE
SWING RADIUS PROBLEMS
In some field service applications, it is difficult or
impossible to thread the gas control onto the gas supply
pipe because of space limitations. This problem can
usually be resolved by using an adapter. The adapter is
installed on the end of the supply pipe in place of the gas
control, following the same precautions and instructions
that are used for installing the gas control. After the
adapter is installed, the gas control is attached to the
adapter as outlined above. Note that using an adapter
increases the overall length of the gas control.
Choose Gas Control Location
Do not locate the gas control where it can be affected by
steam cleaning, high humidity, dripping water, corrosive
chemicals, dust or grease accumulation, or excessive
heat. To ensure proper operation, follow these guidelines:
• Locate gas control in a well ventilated area.
• Mount gas control high enough above the cabinet
bottom to avoid exposure to flooding or splashing
water.
• Make sure the ambient temperature does not exceed
the ambient temperature ratings for each component.
• Cover gas control if appliance is cleaned with water,
steam, or chemicals or to avoid dust and grease
accumulation.
• Avoid locating gas control where exposure to
corrosive chemical fumes or dripping water is likely.
Locate the gas control in the appliance vestibule on the
gas manifold. In replacement applications, locate the gas
control in the same location as the old gas control.
Install Piping to Gas Control
All piping must comply with local codes and ordinances
or with the National Fuel Gas Code (ANSI Z223.1 NFPA
No.54), which ever applies. Tubing installation must
comply with approved standards and practices.
1. Use new, properly reamed pipe free from chips. If
tubing is used, make sure the ends are square,
deburred and clean. All tubing bends must be
smooth and without deformation.
2. Run pipe or tubing to the gas control. If tubing is
used, obtain a tube-to-pipe coupling to connect
the tubing to the gas control.
COLOR CODE FOR
LP
GAS
NATRUAL
GAS
CAP SCREW BLACK SILVER
PRESSURE
REGULATOR
ADJUSTING
SCREW
WHITE WHITE
TAPERED
SPRING RED STAINLESS
STEEL
PRESSURE
REGULATOR
HOUSING
M16015A
M803A
FLANGE
GAS CONTROL
INLET
9/64 IN. (3.6 MM)
HEX SCREWS (4)
1 DO NOT OVERTIGHTEN SCREWS.
TIGHTEN TO 25 IN. LB.
1

VR8300 CONTINUOUS PILOT COMBINATION GAS CONTROL
69-0668—05 4
3. Install sediment trap in the supply line to the gas
control. See Fig. 4.
Fig. 4. Sediment trap installation.
Install Gas Control
To install:
1. Mount the gas control 0 to 90 degrees, in any
direction, from the upright position of the gas con-
trol knob, including vertically.
2. Mount the gas control so the gas flow is in the
direction of the arrow on the bottom of the gas
control.
3. Thread pipe the amount shown in Table 5 for inser-
tion into the gas control. Do not thread pipe too far.
Valve distortion or malfunction can result if the
pipe is inserted too deeply into the gas control. See
Fig. 5.
Fig. 5. Use moderate amount of pipe compound.
Table 5. NPT Pipe Thread Length in in.
IMPORTANT
On LP installations, use compound resistant to
LP gas. Do not use Teflon tape.
4. Apply a moderate amount of good quality pipe
compound (DO NOT use Teflon tape) to pipe only,
leaving two end threads bare. On LP installations,
use compound resistant to LP gas.
5. Remove seals over the gas control inlet and outlet
if necessary.
6. Connect the pipe to the gas control inlet and outlet.
Use a wrench on the square ends of the gas con-
trol. If an adapter is used, place the wrench on the
adapter rather than the gas control. Refer to Fig. 1
and 6.
Fig. 6. Proper use of wrench on gas control.
Connect Pilot Gas Tubing
1. Cut tubing to desired length and bend as necessary
for routing to pilot burner. Do not make sharp
bends or deform the tubing. Do not bend tubing
within 3 inches of the gas control or pilot burner
after compression fitting is tightened, because this
can result in gas leakage at the connection.
2. Square off and remove the burrs from the end of
the tubing.
3. Unscrew the compression fitting from the pilot out-
let (Fig. 1). Slip the compression fitting over the
tubing and slide out of the way.
NOTE: When replacing a gas control, cut off the old
compression fitting and replace with the new
compression fitting provided on the gas control.
Never use the old compression fitting as it may
not provide a gas-tight seal.
4. Push tubing into the pilot gas tapping on the outlet
end of the control until it bottoms. While holding
the tubing all the way in, slide the compression fit-
ting into place and engage threads—turn until fin-
ger-tight. Then tighten one more turn with wrench.
Do not overtighten. Refer to Fig. 7.
Pipe Size
Thread Pipe
this Amount
Maximum Dept Pipe can be
Inserted into Control
3/8 in. 9/16 in. 3/8 in.
1/2 in. 3/4 in. 1/2 in.
3/4 in. 13/16 in. 3/4 in.
GAS
CONTROL
GAS
CONTROL
HORIZONTAL
DROP
PIPED
GAS
SUPPLY
PIPED
GAS
SUPPLY
3 IN.
(76 MM)
MINIMUM
3 IN.
(76 MM)
MINIMUM
RISER
GAS
CONTROL
TUBING
GAS
SUPPLY
HORIZONTAL
DROP
3 IN.
(76 MM)
MINIMUM
RISER
M3077B
2
1
2
2
1
2
ALL BENDS IN METALLIC TUBING SHOULD BE SMOOTH.
CAUTION: SHUT OFF THE MAIN GAS SUPPLY BEFORE REMOVING
END CAP TO PREVENT GAS FROM FILLING THE WORK AREA. TEST
FOR GAS LEAKAGE WHEN INSTALLATION IS COMPLETE.
TWO IMPERFECT
THREADS GAS CONTROL
THREAD PIPE THE AMOUNT
SHOWN IN TABLE FOR
INSERTION INTO GAS CONTROL
APPLY A MODERATE AMOUNT OF
PIPE COMPOUND TO PIPE ONLY
(LEAVE TWO END THREADS BARE).
M3075C
PIPE
APPLY WRENCH
TO FLANGE ONLY
M16012A

VR8300 CONTINUOUS PILOT COMBINATION GAS CONTROL
569-0668—05
Fig. 7. Always use new compression fitting.
5. Connect other end of tubing to pilot burner accord-
ing to pilot burner manufacturer instructions.
Install Thermocouple
The Q340A Thermocouple (with adapters) is provided
with some models of the VR8300. Install the Q340A as
follows:
1. Determine if the pilot burner requires a thermocou-
ple with a push-in clip or attachment nut, and
attach the correct adapter to the Q340.
2. For push-in clip type pilot burners, from beneath,
insert the tip of the Q340 into the hole or barrel of
the pilot burner. Push in firmly to lock in place.
3. For attachment nut type pilot burners: From
beneath, insert the tip of the Q340 into the hole or
barrel in the pilot burner. Engage the threads of the
attachment nut and tighten securely.
If a supplementary limit or energy cutoff (ECO) is used,
insert the ECO connector (order part no. 394332 as
shown in Fig. 8) and then connect the thermocouple lead.
Otherwise, insert the thermocouple lead directly.
Fig. 8. Install thermocouple, optional ECO connector to
power unit.
This is an electrical connection and must be clean and
dry. Never use pipe compound. Tighten only 1/4 turn
beyond finger-tight to give good electrical continuity. Do
not overtighten.
Wiring
CAUTION
Hazardous Voltage.
Can cause personal injury or equipment damage.
Disconnect power supply before installing or
servicing.
All wiring must comply with applicable electrical codes
and ordinances.
Refer to the appliance manufacturer instructions if
available, or use the following procedure.
1. Check the power supply rating on the gas control
and make sure it matches the available supply.
Install the transformer, thermostat, and other con-
trols as required.
2. Connect the control circuit to the gas control termi-
nals. See Fig. 1 and 9.
Fig. 9. Wiring connections for 24V control.
3. Adjust the thermostat heat anticipator to the 0.70
rating stamped on valve operator.
Table 6. Maximum Length of Supplementary Limit Leadwires in in. (m) When Using Q340A Thermocouple.
GAS CONTROL
TIGHTEN NUT ONE TURN
BEYOND FINGER-TIGHT. TO PILOT
BURNER
FITTING BREAKS OFF AND CLINCHES
TUBING AS NUT IS TIGHTENED. M3076B
THERMOCOUPLE
LEAD
ECO
CONNECTOR
1THIS IS AN ELECTRICAL CONNECTION AND MUST BE
CLEAN AND DRY. DO NOT USE PIPE COMPOUND.
M3095B
1
L1
(HOT)
L2 1
24V
THERMOSTAT
OPTIONAL
CONVENIENCE
TERMINALS TH/TR
TH
TR GAS CONTROL
TERMINALS
HIGH LIMIT
CONTROLLER
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD
PROTECTION AS REQUIRED.
DO NOT JUMPER THESE TERMINALS. THIS SHORTS VALVE COIL
AND CAN BURN OUT ANTICIPATOR IN THERMOSTAT.
CONVENIENCE TERMINALS SERVE ONLY AS A TIE POINT.
THEY ARE NOT INTERNALLY WIRED TO THE CONTROL CIRCUIT
OR TO GROUND.
OPTIONAL HIGH LIMIT.
1
2
3
4
2
3
4
M2915C
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.
18 0.5 35 0.9 22 0.6 13 0.3
24 0.6 29 0.7 18 0.5 11 0.3
30 0.8 23 0.6 15 0.4 9 0.2
36 0.9 17 0.4 11 0.3 6 0.3
48 1.2 DO NOT USE
60 1.5

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
Fig. 1.
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

VR8300 CONTINUOUS PILOT COMBINATION GAS CONTROL
769-0668—05
CAUTION
1. Do not exceed the input rating stamped on the
appliance nameplate, or the manufacturer
recommended burner orifice pressure for the size
orifice(s) used. Make sure the main burner
primary air supply is properly adjusted for
complete combustion Follow the instructions of
the appliance manufacturer.
2. IF CHECKING GAS INPUT BY CLOCKINGTHE
GAS METER:
•Be sure there is no gas flow through the meter
other than that of the appliance being tested.
•Other appliances must remain off with pilots
extinguished (or the consumptions must be
deducted from the meter reading).
•Convert the flow rate to Btuh as described in the
Gas Controls Handbook, form 70-2602, and
compare to the Btuh input rating on the
appliance name plate.
3. IF CHECKING GAS INPUT WITH A MANOMETER
(PRESSURE GAUGE):
•Make sure the gas control knob is in the PILOT
position before removing the outlet pressure
tap plug to connect the manometer.
•Turn the gas control knob back to PILOT when
removing the manometer and replacing outlet
pressure tap plug.
•Shut off the gas supply at the appliance service
valve or, for LP gas, at the gas tank before
removing the outlet pressure tap plug, and
before disconnecting the manometer and
replacing the outlet pressure tap plug.
•Perform the Gas Leak Test at the inlet pressure
tap plug.
Standard-Opening and Slow-
Opening Pressure Regulator
1. The gas control outlet pressure should match the
manifold pressure listed on the appliance name-
plate.
2. With the main burner operating, check the gas con-
trol flow rate using the meter clocking method or
check the gas pressure using a manometer con-
nected to the gas control outlet pressure tap. See
Fig. 1.
3. If necessary, adjust the pressure regulator to
match the appliance rating. Refer to Table 7or 8 for
the factory-set nominal outlet pressures and
adjustment ranges.
a. Remove the pressure regulator adjustment cap
and screw.
b. Use a screwdriver to turn the inner adjustment
screw clockwise to increase or counter-
clockwise to decrease the main burner
gas pressure.
c. Always replace the cap screw and tighten
firmly to ensure proper operation.
4. If the desired outlet gas pressure or gas flow rate
cannot be achieved by adjusting the gas control,
check the gas control inlet pressure using a
manometer at the inlet pressure tap. If the inlet
pressure is in the normal range (refer to Table 7 or
8), replace the gas control. Otherwise, take the nec-
essary steps to provide proper gas pressure to the
gas control.
Table 8. Pressure Regulator Specification Pressures in in. wc.
Table 9. Pressure Regulator Specification Pressures in Kpa.
CHECK SAFETY SHUTDOWN
PERFORMANCE
WARNING
Fire or Explosion Hazard.
Can cause property damage, severe injury, or
death
Perform the safety shutdown test any time work
is done on a gas system.
1. Place the gas control knob in the PILOT position.
Main burner should go off and pilot should remain
lit.
2. Extinguish the pilot flame. Pilot gas flow should
stop within 2-1/2 minutes. Safety shutoff of pilot
gas proves complete shutdown since safety shut-
off valve prevents main burner and pilot gas flow.
3. Relight pilot burner and operate system through
one complete cycle to ensure all controls operate
properly.
Model Type of Gas
Nominal Inlet Pressure
Range
Outlet Pressure
Nominal Factory Setting Setting Range
Step Full Range Step Full Rate
Standard-
opening
Natural 5.0 - 7.0 — 3.5 — 3.0 - 5.0
Lp 12.0 - 14.0 — 11.0 — 8.0 - 12.0
Model Type of Gas
Nominal Inlet Pressure
Range
Outlet Pressure
Nominal Factory Setting Setting Range
Step Full Range Step Full Rate
Standard-
opening
Natural 1.2 - 1.7 — 0.9 — 0.7 - 1.2
Lp 2.9 - 3.9 — 2.7 — 2.0 - 3.0

VR8300 CONTINUOUS PILOT COMBINATION GAS CONTROL
69-0668—05 8
MAINTENANCE
WARNING
Fire or Explosion Hazard.
Can cause property damage, severe injury, or
death.
Improper cleaning or reassembly can cause gas
leakage. When cleaning, ensure that control is
reassembled properly and perform gas leak test.
Regular preventive maintenance is important in
applications that place a heavy load on system controls
such as in the commercial cooking and agricultural and
industrial industries because:
• In many such applications, particularly commercial
cooking, the equipment operates 100,000-200,000
cycles per year. Such heavy cycling can wear out the
gas control in one to two years.
• Exposure to water, dirt, chemicals and heat can
damage the gas control and shut down the control
system.
The maintenance program should include regular check-
out of the gas control as outlined in the Startup and
Checkout section, and the control system as described in
the appliance manufacturer literature.
Maintenance frequency must be determined individually
for each application. Some considerations are:
• Cycling frequency. Appliances that may cycle 100,000
times annually should be checked monthly.
• Intermittent use. Appliances that are used seasonally
should be checked before shutdown and again before
the next use.
• Consequence of unexpected shutdown. Where the
unexpected shutdown is costly, the system should be
checked more often.
• Dusty, wet, or corrosive environment. In these
environments the gas control can deteriorate more
rapidly so the system should be checked more often.
The gas control should be replaced if:
• It does not perform properly on checkout or trouble-
shooting.
• The gas control knob is hard to turn or push down, or
it fails to pop up when released.
• The gas control is likely to have operated for more
than 200,000 cycles.
SERVICE
WARNING
Fire or Explosion Hazard.
Can cause property damage, severe injury or
death
Do not disassemble the gas control; it contains
no replaceable components. Attempted
disassembly or repair can damage the gas
control.
CAUTION
Hazardous voltage.
Improper installation can burn out thermostat
heat anticipator.
Do not apply a jumper across or short the valve
coil terminals.
IMPORTANT
Allow 60 seconds after shutdown before re-
energizing step-opening model to ensure light
off at step pressure.
If Pilot Burner Flame does not Light:
1. Make sure that the main gas supply valve is open
and the pilot gas supply line is purged of air.
2. Light the pilot burner flame following procedures in
Light the Pilot Burner Flame section. If pilot burner
flame does not light:
a. Check the pilot gas adjustment screw. If closed,
readjust the pilot flame. Refer to Adjust the
Pilot Burner Flame section.
b. Perform the Gas Leak Test at the compression
fitting. If a gas leak is detected, replace the old
compression fitting or tighten the newly
installed one. See Fig. 1.
c. Make sure that the pilot burner tubing or pilot
burner orifice is not clogged.
If Pilot Burner Flame Goes Out when
Gas Control Knob is Released:
1. Make sure the gas control knob is held in at least
one minute to allow the thermocouple time to heat.
2. Check the pilot burner flame adjustment. Refer to
Adjust the Pilot Burner Flame section.
3. Check the wiring between the thermocouple and
the gas control valve operator.
4. Make sure that the thermocouple connection to the
power unit is tightened 1/4 turn beyond finger
tight.
5. If pilot burner flame goes out, measure the open-
circuit thermocouple output voltage. Compare it to
the acceptable range charts in the thermocouple
specifications or in the Gas Controls Handbook.
Replace the thermocouple if voltages are outside
the acceptable range.
6. Check the power unit resistance. If it is above
11 ohms, replace the gas control.
If Main Burner does not Come on
with Call For Heat:
1. Make sure the gas control knob is in the ON posi-
tion.
2. Adjust the thermostat several degrees above the
room temperature.
3. Use an ac voltmeter to measure the voltage across
terminals TH and TR. If:
a. No voltage is present, check the control circuit
for proper operation.
b. 24 Vac is present, but first operator did not
click open, check for excessive inlet gas pres-
sure. If inlet gas pressure is correct, replace the
gas control.
4. Measure the closed thermocouple output voltages
and compare to the acceptable range charts in the
thermocouple specifications or in the Gas Controls
Handbook. Replace the thermocouple if voltages
are outside the acceptable range.
If Main Burner is Over firing:
Adjust the gas control pressure regulator to the correct
pressure. If the regulator cannot be adjusted and supply
pressure is in the normal range, replace the gas control.

VR8300 CONTINUOUS PILOT COMBINATION GAS CONTROL
969-0668—05
Instructions to the Homeowner
WARNING
Fire or Explosion Hazard.
Can cause property damage, severe injury, or
death.
Follow these warnings exactly:
1. Pilot burner flame must be lit manually. Follow
these instructions exactly.
2. Before lighting pilot burner flame, smell around the
appliance area for gas. Be sure to smell next
to floor because LP gas is heavier than air.
3. IF YOU SMELL GAS:
•Immediately turn off the gas supply at the
appliance service valve. On LP gas
systems, turn off the gas supply at the gas
tank.
•Do not light any appliances in the house.
•Do not touch electrical switches or use the
phone.
•Leave the building and call your gas supplier.
•If you can not reach your gas supplier, call
the fire department.
4. Do not force the gas control knob on the appliance.
Use only your hand to turn the gas control
knob. Never use any tools. If the gas control
knob does not operate by hand, have a quali-
fied service technician replace the control.
Force or attempted repair can result in a fire
or explosion.
5. The gas control is a safety device, it must be
replaced in case of any physical damage
such as bent terminals, missing or broken
parts, stripped threads, or evidence of expo-
sure to heat.
IMPORTANT
Follow the operating instructions provided by
the manufacturer of your heating appliance. The
information below is for a typical gas control
application, but the specific controls used and
the procedures outlined by the manufacturer or
your appliance may differ, requiring special
instructions.
Lighting the Pilot Burner Flame
STOP: READ THE WARNING ABOVE.
The pilot burner flame must be lit manually. If the pilot
burner flame has gone out, follow these instructions
exactly.
1. Set the thermostat to its lowest setting.
2. Disconnect all electric power to the appliance.
3. Remove the gas control access panel.
4. Push in the gas control knob slightly and turn
clockwise to OFF.
NOTE: The gas control knob cannot be turned
from PILOT to OFF unless it is pushed in
slightly. Do not force the gas control knob.
5. Wait five minutes to clear out any unburned gas. If
you then smell gas, STOP! Follow the instructions
in step 3, IF YOU SMELL GAS section, in the Warn-
ings listed. If you do not smell gas, continue with
the next step.
6. Remove the pilot burner access panel located
below and behind the gas control.
7. Find the pilot burner by following the metal tube
from the gas control. The pilot burner is between
the two burner tubes behind the pilot burner
access panel.
8. Turn the gas control knob counterclockwise
to PILOT.
9. Push and hold the gas control knob all the way in.
Immediately light the pilot burner flame with a
match and continue holding in the gas control
knob for one minute after the pilot burner flame is
lit.
10. Release the gas control knob until it pops back
up.The pilot burner flame should remain lit. If pilot
burner flame goes out, repeat steps 1 through 10.
a. If the gas control knob does not pop up when
released, stop immediately and call your ser-
vice technician or gas supplier.
b. If the pilot flame does not stay lit after several
attempts, turn the gas control knob to OFF and
call your service technician or gas supplier.
11. Turn the gas control knob counterclockwise
to ON.
12. Replace the pilot burner access panel.
13. Replace the gas control access panel.
14. Reconnect all electric power to the appliance.
15. Set the thermostat to the desired setting.
Turning Off Appliance
Vacation Shutdown: Set the thermostat to the desired
room temperature while you are away.
Complete Shutdown: Push the gas control knob in
slightly and turn clockwise to OFF. Do not force.
Appliance completely shuts off. Follow the steps in
Lighting the Pilot Burner Flame section to resume normal
operation.

VR8300 CONTINUOUS PILOT COMBINATION GAS CONTROL
69-0668—05 10

VR8300 CONTINUOUS PILOT COMBINATION GAS CONTROL
11 69-0668—05

VR8300 CONTINUOUS PILOT COMBINATION GAS CONTROL
© 2020 Resideo Technologies, Inc. All rights reserved.
This product is manufactured by Resideo Technologies, Inc. and its affiliates.
www.resideo.com
Resideo Technologies, Inc.
1985 Douglas Drive North, Golden Valley, MN 55422
1-800-468-1502
69-0668—05 M.S. Rev. 06-20 | Printed in United States