resideo VR8245 Series User manual

INSTALLATION INSTRUCTIONS
69-2013-04
VR8245 and VR8345 Electronic Ignition
Gas Controls
APPLICATION
The electronic ignition gas controls are used in gas-fired
appliances with capacities up to 415 cu ft/hour at 1 inch
wc pressure drop [11.8 cu m/hour at 0.25 kPa] for
natural gas. These gas controls will operate with a direct
spark (DSI), hot surface (HSI) or intermittent pilot
ignition. The control includes a manual valve, two
automatic operators, a pressure regulator, pilot
adjustment, pilot plug, conduit cover and ignition
adapter. Refer to the following list for the specifications.
SPECIFICATIONS
Ambient Temperature Range: -40° to 175°F
[-40° to 79°C].
Body Pattern: Straight-through.
Ignition Adapter: Configures device to operate with
direct spark or hot surface ignition.
Electrical Ratings:
Voltage and Frequency: 24 Vac, 50/60 Hz.
Current Draw: See Table 3 for current draw.
Capacity: See Table 1.
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 2 to convert capacities
for other gases.
Approvals:
American Gas Association Design Certificate:
L2025007.
Canadian Gas Association Design Certificate:
L2025007.
Pipe Adapters: Includes two 3/4 to 1/2 inch NPT bush-
ings and one 1/2 to 3/8 inch NPT bushing.
Models include: Natural to LP conversion kit and
Reducer bushings
Cross Reference: See Table 4 for cross reference infor-
mation.
INSTALLATION
WHEN INSTALLING THIS
PRODUCT…
1. Read these instructions carefully. Failure to follow
them could damage the product or cause a haz-
ardous condition.
2. Check the ratings given in the instructions and on
the product to make sure the product is suitable
for your application.
3. The installer must be a trained, experienced ser-
vice technician.
4. After installation is complete, use these instruc-
tions to check out product operation.
Table 1. Gas Capacity.
Models Size 1” PD Capacity
Minimum Regulated
Capacity
Maximum Regulated
Capacity
VR8245 1/2X1/2 150,000 20,000 (40,000 for LP) 200,000
VR8345 1/2 X 1/2 240,000 30,000 340,000
3/4 X 3/4 300,000 30,000 415,000
1/2 X 3/4 270,000 30,000 370,000
Table 2. Gas Capacity Conversion Factors.
Gas Specific Gravity
Multiply Listed
Capacity By
Manufactured 0.60 0.516
Mixed 0.70 0.765
Propane 1.53 1.62

VR8245 AND VR8345 ELECTRONIC IGNITION GAS CONTROLS
69-2013—04 2
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 damage.
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. When working with a system using intermittent pilot ignition, do not bend pilot tubing at gas control or pilot
burner after compression fitting has been tightened because gas leakage at the connection can result.
4. Always install sediment trap in gas supply line to prevent contamination of gas control.
5. 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, call a qualified service technician to replace the gas control.
Force or attempted repair can result in fire or explosion.
CAUTION
Never apply a jumper across or short the valve
coil terminals. This can burn out the heat
anticipator in the thermostat or damage the
electronic intermittent pilot (IP) module.
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 following instructions.
Table 3. Fuel Conversion Kits.
Valve
Size
(Inlet and Outlet)
Pressure
Regulator Type Current Draw (A)
Conversion Kits
Natural Gas - LP LP - Natural Gas
VR8245M 1/2 x 1/2 Standard .5 393691 394588
VR8345H,K 3/4 x 3/4 Slow-Opening .7 393691 394588
VR8345M 3/4 x 3/4 Standard .7 393691 394588
VR8345Q 3/4 x 3/4 2-Stage .9 396021 396025
Table 4. Cross Reference.
Service Part Resideo White-Rodgers Robert-Shaw
VR8245M2530 VR8204M1075, VR8204M1091,
VR8204A1201, VR8204A1219,
VR8204A2001, VR8204A2076,
VR8204A2175, VR8204A2803,
VR8205A2008, VR8205M1106,
VR8205A2024, VR8205M2310,
VR8205M2443
36E01-204, 36E01-205,
36E01-206, 36E01-305,
36E22-214, 36E36-304,
36E93-304, 36G22-214,
36J22-214
720-079 (7200IPER),
720-080 (7200IPER-LP),
722-051 (2000DERHC),
722-079 (2000IPERHC)
VR8345H4555 VR8204H1006, VR8304H4503,
VR8305H4013, VR8305H4039,
VR8205H1003
36E24-214, 36E52-214,
36E93-304, 36E98-304
720-070 (72000IPER-S7C), 720-
071 (72000IPER-S7C), 720-072
(72000IPER-S7C), 720-073
(72000IPER-LP-S7C)
VR8345M4302 VR8204A1201, VR8204A1219,
VR8204A2001, VR8204A2175,
VR8204A2803, VR8204M1075,
VR8205A2008, VR8205M1106,
VR8205M2310, VR8205M2443,
VR8304M3509, VR8304M4002,
VR8304M4507, VR8305M3506,
VR8305M4066, VR8305M4165,
VR8305M4231
36C68-423, 36C74-413,
36E01-204, 36E01-205,
36E01-206, 36E01-305,
36E22-214, 36E36-304,
36E93-304, 36G22-214,
36J22-214
720-051 (7200DER),
720-079 (7200IPER),
720-080 (7200IPER-LP),
722-051 (2000DERHC),
722-079 (2000IPERHC)
VR8345Q4563 VR8205Q2381, VR8205Q2555,
VR8205Q2662, VR8205Q2746,
VR8205Q2787, VR8305Q4453,
VR8304Q4511, VR8305Q4138,
VR8305Q4146, VR8305Q4500
36C76-406, 36C76-420,
36C76-463, 36D13-208,
36D13-405, 36E54-214,
36E96-314, 36G54-214
720-082 (7200IPER2-4)

VR8245 AND VR8345 ELECTRONIC IGNITION GAS CONTROLS
369-2013—04
Converting Between Natural And LP
Gas
WARNING
FIRE OR EXPLOSION HAZARD
CAN CAUSE PROPERTY DAMAGE, SEVERE
INJURY, OR DEATH
Do not attempt to use a gas control set for natural
gas on LP gas or a gas control set for LP gas on
natural gas.
Convert standard-opening, slow-opening, and 2 stage
gas controls from natural gas to LP gas with the
conversion kit included with this gas control. For
conversion kit part number, see Table 3.
To convert from one gas to another:
VR8245M, H, K AND VR8345M, H, K:
1. Turn off gas supply at the appliance service valve.
2. Remove regulator cap screw and pressure regula-
tor adjusting screw. Refer to Fig. 3.
3. Remove the existing spring.
4. Insert the replacement spring. Refer to Fig. 4.
5. Install the new plastic pressure regulator adjust-
ment screw. Assure that the screw top is flush with
the regulator top.
6. Turn pressure regulator adjustment screw clock-
wise eleven complete turns. The preliminary pres-
sure setting is approximately 10.0 in. wc (2.5 kPa)
for LP gas regulator (393691) and 3.5 in. wc (0.9
kPa) for natural gas regulator (394588).
7. Check the regulator setting using a manometer or
by clocking the gas meter. See Check and Adjust
Gas Input to Main Burner section.
8. Install the new cap screw and O ring.
9. Mount conversion label on the gas control.
VR8345Q:
1. Turn off gas supply at the appliance service valve.
2. Remove the pressure regulator cover assembly.
Refer to Fig. 5.
3. Remove the existing stem/spring assembly.
4. Insert the replacement stem/spring assembly.
5. Replace the pressure regulator cover assembly and
tighten screws.
6. Mount conversion label on the gas control
7. Check the regulator setting using a manometer or
by clocking the gas meter. See Check and Adjust
Gas Input to Main Burner section.
INSTALL BUSHINGS TO CONTROL
1. Remove the seal over the control inlet or outlet.
2. Apply a moderate amount of good quality pipe
compound to the bushing, leaving two end threads
bare. See Fig. 1. On an LP installation, use com-
pound that is resistant to LP gas. Do not use Teflon
tape.
3. Insert the bushing in the control and carefully
thread the pipe into the bushing until tight.
Fig. 1. Use moderate amount of pipe compound.
Complete the instructions below for installing the piping,
installing the control, connecting the pilot gas tubing and
the wiring. Make sure the leak test you perform on the
control after completing the installation includes leak
testing the adapters and screws.
Choose Gas Control Location
Locate the combination gas control in the appliance
vestibule on the gas manifold. In replacement
applications, locate the gas control in the same location
as the old control.
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.
For 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 when the 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
possible.
Install Piping to Gas Control
All piping must comply with applicable codes and
ordinances or with the National Fuel Gas Code (ANSI
Z223.1 NFPA No. 54), whichever 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. Make sure all tubing bends are
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.
3. Install sediment trap in the supply line to the gas
control. See Fig. 2.
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).
M3075B
PIPE

VR8245 AND VR8345 ELECTRONIC IGNITION GAS CONTROLS
69-2013—04 4
Fig. 2. Install sediment trap.
Install Gas Control
1. This gas control can be mounted from 0 to 90
degrees in any direction from the vertical position
of the gas control knob.
2. Mount the gas control so gas flow is in the direc-
tion 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.
IMPORTANT:
Do not thread pipe too far. Valve distortion or
malfunction can result when the pipe is inserted
too deeply into the gas control.
4. Apply a moderate amount of good quality pipe
compound (do not use Teflon tape) to pipe only,
leaving two end threads bare. See Fig. 1. On LP
installations, use compound resistant to LP gas.
5. Remove seals over gas control inlet and outlet if
necessary.
6. Connect pipe to gas control inlet and outlet. Use
wrench on the square ends of the gas control. See
Fig. 3 and 6.
When working with an intermittent pilot ignition system,
go to Connect Pilot Gas Tubing section next. When
installing on a hot surface or direct spark ignition system,
go to the Wiring section.
Fig. 3. Top view of gas control.
GAS
CONTROL
GAS
CONTROL
HORIZONTAL
DROP
PIPED
GAS
SUPPLY
PIPED
GAS
SUPPLY
3 IN.
(76 MM)
MINIMUM
3 IN.
(76 MM)
MINIMUM
3 IN.
(76 MM)
MINIMUM
RISER
GAS
CONTROL
TUBING
GAS
SUPPLY
HORIZONTAL
DROP
RISER
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.
M8435A
Table 5. NPT Pipe Thread Length in in.
Pipe Size
Thread Pipe
This Amount
Maximum Depth Pipe Can Be
Inserted Into Control
3/8 9/16 3/8
1/2 3/4 1/2
3/4 13/16 3/4
INLET
INLET
OUTLET
HI
LO
PRESSURE REGULATOR
ADJUSTMENT
(UNDER CAP SCREW)
WIRING
TERMINALS (3)
INLET
PRESSURE TAP
PILOT ADJUSTMENT
(UNDER CAP SCREW)
GAS
CONTROL
KNOB
HI-LOW
ADJUSTMENT SCREWS
(UNDER CAP)
REGULATOR
VENT COVER
TWO-STAGE
PRESSURE
REGULATOR
MODEL
M10968B
PILOT OUTLET
OUTLET
PRESSURE
TAP

VR8245 AND VR8345 ELECTRONIC IGNITION GAS CONTROLS
569-2013—04
Fig. 4. 393691, 394588 Coversion kit installation in
regulator
Fig. 5. 396021, 396025 two stage conversion kit
installation.
Fig. 6. Proper use of wrench on gas control.
Connect Pilot Gas Tubing
(Intermittent Pilot Ignition Only)
1. Remove the pilot gas seal (plug).
2. Cut tubing to desired length and bend as necessary
for routing to pilot burner.
CAUTION
Do not kink tubing.
1. Do not make sharp bends or deform the tubing.
2. Do not bend tubing within 3 inches of the gas
control or pilot burner after compression fitting
has been tightened because this can result in
gas leakage at the connection.
3. Square off and remove burrs from end of tubing.
4. Use the compression fitting supplied with this gas
control. Slip the fitting over the tubing and slide out
of the way.
NOTE: When replacing a gas control, cut off old com-
pression fitting and replace with the new com-
pression fitting provided on the gas control.
Never use the old compression fitting because it
may not provide a gas-tight seal.
5. Push tubing into the pilot gas tapping on the outlet
end of the control until it bottoms. While holding
tubing all the way in, slide compression fitting into
place, engage threads and turn until finger tight.
Then tighten one more turn with wrench. Do not
overtighten. Refer to Fig. 7 and 8.
6. Connect other end of tubing to pilot burner accord-
ing to pilot burner manufacturer instructions.
Fig. 7. Always use new compression fitting.
COLOR CODE FOR
LP
GAS
NATURAL
GAS
CAP SCREW BLACK
BLACK BLACK
SILVER
PRESSURE
REGULATOR
ADJUSTING
SCREW
BLACK BLACK
SPRING RED STAINLESS
STEEL
PRESSURE
REGULATOR
HOUSING
M7780C
O RING
M12944A
PRESSURE
REGULATOR
COVER
A
SSEMBLY
STEM/SPRING
A
SSEMBLY
(BLACK—LP GAS;
WHITE—NATURAL GAS)
APPLY WRENCH
FROM TOP OR
BOTTOM OF GAS
CONTROL TO
EITHER SHADED AREA
M8562B
GAS CONTROL
TIGHTEN NUT ONE TURN
BEYOND FINGER-TIGHT. TO PILOT
BURNER
FITTING BREAKS OFF AND CLINCHES
TUBING AS NUT IS TIGHTENED.
M3076B

VR8245 AND VR8345 ELECTRONIC IGNITION GAS CONTROLS
69-2013—04 6
Fig. 8. Remove pilot gas seal (plug) and install pilot gas
tube for intermittent pilot application on VR8345.
WIRING
CAUTION
Disconnect power supply before making wiring
connections to prevent electrical shock or
equipment damage.
Follow the wiring instructions furnished by the appliance
manufacturer, if available, or use the following general
instructions. Where these instructions differ from the
appliance manufacturer, follow the appliance
manufacturer instructions.
All wiring, including insulated quick connect terminals,
must comply with applicable electrical codes and
ordinances.
1. Check the power supply rating on the gas control
and make sure it matches the available supply.
Install thermostat and other controls as required.
2. When the gas control is installed on a hot surface
or direct spark ignition system, attach the wire
adapter provided to the wiring terminals. See Fig. 9
for the wire terminal location.
3. Connect control circuit to gas control terminals.
See Fig. 3 and 10, 11, 12, or 13.
4. Adjust the thermostat heat anticipator to 0.7, the
rating stamped on the valve operator.
Fig. 9. Install wire adapter for hot surface or direct spark
ignition systems. Pilot plug must be in the valve pilot
opening.
M8441A
PV
MV
PV
MV
OFF
ON
PILOT GAS
TUBE
M8440A
PV
MV
PV
MV
OFF
ON
PILOT GAS SEAL
(PLUG)
WIRE
ADAPTER

VR8245 AND VR8345 ELECTRONIC IGNITION GAS CONTROLS
769-2013—04
Fig. 10. VR8245M/VR8345M,H wiring connections in intermittent ignition system.
Fig. 11. VR8245M/VR8345M,H wiring connections in hot surface ignition system.
L1
(HOT)
L2
L2
1
L1
(HOT)
1
4
1
2
3
4
5
6
2
5
63
M23470
S8610U
MV MV/PV PV
GND
(BURNER)
24V
GND 24V TH-W
VENT
DAMPER
PLUG SENSE SPARK
THERMOSTAT
LIMIT
CONTROLLER
PILOT
BURNER
GROUND
SENSOR
IGNITER
MV
MV/PV
PV
VALVE
DUAL VALVE COMBINATION
GAS CONTROL
PILOT GAS
SUPPLY
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.
ALTERNATE LIMIT CONTROLLER LOCATION.
MAXIMUM CABLE LENGTH 3 FT [0.9 M].
CONTROLS IN 24V CIRCUIT MUST NOT BE GROUND LEG TO TRANSFORMER.
LEAVE VENT DAMPER PLUG CONNECTED.
REMOVE JUMPER AND CONNECT SENSE TERMINAL ON TWO ROD APPLICATION ONLY.
CONTROLLER
COMBUSTION
AIR BLOWER
MOTOR
COMBUSTION
AIR BLOWER
RELAY
AIR
PROVING
SWITCH
MV
MV
L1
(HOT)
L2
1
3
2
1
2
3
3
VALVE
S8910U HOT SURFACE IGNITER CONTROL
HOT SURFACE
IGNITER/SENSOR
Q354 FLAME
SENSOR
LIMIT
CONTROLLER
THERMOSTAT OR
CONTROLLER
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. MAKE SURE L1 AND L2 ARE NOT
REVERSED. THIS WOULD PREVENT FLAME DETECTION.
ALTERNATE LIMIT CONTROLLER LOCATION
SENSE TERMINAL AND Q354 FLAME SENSOR ON D MODELS ONLY.
BURNER
GROUND
M23471A
QUICK
CONNECTS
AUTO IGNITION
SYSTEMS
ANSI Z21.20
STATUS LED:
1. Flash-Ignition Lockout
2 Flash-Weak Flame Signal
3 Flash-Internal Error-Replace Control
Pulsing "Heartbeat"-Normal Operation
S8910U HOT SURFACE IGNITION
INPUT VOLTAGES = 120 & 24 VAC, 60HZ
HSI = 120V, 6.5A MAX
VALVE = 24V, 1A MAX TOTAL 24V LOAD = 0.2 + VALVE LOAD
120VAC
HOT
570A0056
WARNING
!
Explosion hazard. Can cause
serious injury or death.
This device can malfunction if
it gets wet. Never try to use a
device that has been wet -- replace it.
GND
(BURNER)
24V
(GND)
VALVE
(GND)
24V
LED
L2
HSI
HSI
L1
SENSE
VALVE
MPLS., MN 55422
SEE
INSTRUCTIONS
FOR REMOTE
SENSE/DUAL
ROD
APPLICATIONS
TRIAL TIME,
NUM. OF TRIALS
CONFIGURATION
PLUG
120VAC
NEUTRAL
TRIAL
TIME: 7 SEC
NUM OF
TRIALS: 1
Prepurge Time = 30 Sec
Igniter Warmup Time = 34 sec
HSI WIRE
ADAPTER

VR8245 AND VR8345 ELECTRONIC IGNITION GAS CONTROLS
69-2013—04 8
Fig. 12. VR8245M/VR8345M,H wiring connections in
direct spark ignition system (single rod application).
Fig. 13. VR8345Q wiring diagram.
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 module, gas can flow to the pilot and main
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.
Adjust the Pilot Burner Flame
(Intermittent Pilot Ignition only)
The pilot flame should envelop 3/8 to 1/2 in. [10 to 13
mm] of the igniter-sensor tip. See Fig. 14. If the pilot
flame is small or lazy, or does not touch the ground
electrode or thermocouple, the inlet gas pressure may be
too low, or the pilot orifice may be partially clogged.
Check and repair as necessary. If the pilot flame is hard
and noisy, the inlet gas pressure may be too high. If pilot
adjustment is necessary, proceed as follows:
1. Remove the pilot adjustment cover screw. Refer to
Fig. 3.
2. Turn the inner adjustment screw clockwise to
decrease or counterclockwise to increase pilot
flame.
3. To prevent gas leakage, always replace the cover
screw after adjustment.
Fig. 14. Proper flame adjustment.
Valve terminals: Typically connects to:
Hi W2, Hi
Mv or Lo Mv, Lo, Valve
CMv/Pv,Valve
Pv Pv
24V
24V (GND)
S87 CONTROL MODULE
ALARM
VALVE
VALVE
GND
TEMPERATURE
CONTROLLER
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD
PROTECTION AS REQUIRED.
ALTERNATE LIMIT CONTROLLER LOCATION.
MAXIMUM IGNITER-SENSOR CABLE LENGTH: 3 FT [.9 M] OR LESS.
3A REPLACEABLE FUSE.
ALARM TERMINAL PROVIDED ON SOME MODELS.
M23472
MV
MV
L1
(HOT)
L2
1
2
1
2
3
VALVE
Q347 IGNITER-SENSOR
BURNER
4
4
5
IGNITER-SENSOR AND
BURNER GROUND
3
5
ALARM,
IF USED
QUICK
CONNECTS
DSI WIRE
ADAPTER
2-STAGE
GAS VALVE
HI
MV
PV
C
SECOND STAGE OR HIGH FIRE
MAIN VALVE OR LO FIRE
PILOT VALVE FOR INTERMITTENT IGNITION ONLY
COMMON TERMINAL OF IGNITION COILS
M23473
PROPER FLAME
ADJUSTMENT
IGNITER-
SENSOR
M3080A
3/8 TO 1/2 INCH
(10 TO 13 mm)

VR8245 AND VR8345 ELECTRONIC IGNITION GAS CONTROLS
969-2013—04
Check And Adjust Gas Input to Main
Burner
CAUTION
Fire or explosion hazard.
1. Do not exceed the input rating stamped on the
appliance nameplate, or manufacturer
recommended burner orifice pressure for the
size orifice(s) used. Make certain the primary
air supply to the main burner is properly
adjusted for complete combustion (refer to the
appliance manufacturer instructions).
2. WHEN CHECKING GAS INPUT BY CLOCKING
THE GAS METER:
• Make sure that the only gas flow through the
meter is that of the appliance being checked.
• Make certain that other appliances are
turned off with pilot burners extinguished (or
deduct that gas consumption from the meter
reading).
• Convert the flow rate to Btuh as described in
Gas Controls Handbook, form 70-2602, and
compare to the Btuh input rating on the
appliance nameplate.
3. WHEN CHECKING GAS INPUT WITH A
MANOMETER (PRESSURE GAUGE):
• To connect the manometer, be sure the gas
control knob is in the OFF position before
removing the outlet pressure tap plug.
• When removing the manometer, turn the gas
control knob back to OFF and replace the
outlet pressure tap plug.
• Shut off the gas supply at the appliance
service valve, or at the gas tank for LP gas,
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 outlet
pressure tap plug.
Standard-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 by using the meter clocking method
or check the gas pressure using a manometer con-
nected to the gas control outlet pressure tap. See
Fig. 3.
3. If necessary, adjust the pressure regulator to
match the appliance rating. Refer to Table 6 for the
factory set nominal outlet pressures and adjust-
ment setting ranges.
a. Remove the pressure regulator adjustment cap
screw.
b. Using a screwdriver, 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 safeguard 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 by using a
manometer at the inlet pressure tap. If the inlet
pressure is in the normal range (refer to Table 6
and 7), replace the gas control. Otherwise, take the
necessary steps to provide proper gas pressure to
the gas control.
Standard and Slow-Opening (H and M)
Models
1. Carefully check the main burner lightoff. Make sure
that the main burner lights smoothly and that all
ports remain lit.
2. Check the full rate manifold pressure listed on the
appliance nameplate. Gas control full rate outlet
pressure should match this rating.
3. With main burner operating, check the control flow
rate using the meter clocking method or check
pressure using a manometer connected to the out-
let pressure tap on the control. See Fig. 3.
4. If necessary, adjust the pressure regulator to
match the appliance rating. See Table 6 and 7 for
factory-set nominal outlet pressure and adjust-
ment range.
a. Remove the pressure regulator adjustment cap
screw.
b. Using a screwdriver, turn the inner adjustment
screw (Fig. 3) clockwise to increase or
counterclockwise to decrease the gas
pressure to the burner.
c. Always replace the cap screw and tighten
firmly to prevent gas leakage.
5. If the desired outlet pressure or flow rate cannot be
achieved by adjusting the gas control, check the
gas control inlet pressure using a manometer at
the inlet pressure tap of the gas control. If the inlet
pressure is in the nominal range (see Table 6 and
7), replace the gas control. Otherwise, take the nec-
essary steps to provide proper gas pressure to the
control.

VR8245 AND VR8345 ELECTRONIC IGNITION GAS CONTROLS
69-2013—04 10
Two-Stage (Q) Models
Two-stage models require that you check and adjust
both high and low pressure regulator settings. Two-
stage appliance operating sequences vary. Consult the
appliance manufacturer instructions for the specific
operating sequence and regulator adjustment procedure
for the appliance in which the control is installed.
1. Set appliance to operate on high.
2. Carefully check the main burner lightoff. Make sure
that the main burner lights smoothly and that all
ports remain lit.
3. Check the full rate (high) manifold pressure listed
on the appliance nameplate for high pressure. The
gas control full rate outlet pressure should match
this rating.
4. With main burner operating, check the gas control
flow rate using the meter clocking method or check
pressure using a manometer connected to the out-
let pressure tap on the gas control. See Fig. 3.
5. If necessary, adjust the high pressure regulator to
match the appliance rating. See Table 6 and 7 for
factory-set nominal outlet pressure and adjust-
ment range.
a. Remove the pressure regulator adjustment cap
(Fig. 3).
b. Using a screwdriver, turn the inner adjustment
screw for HI pressure clockwise to increase
or counterclockwise to decrease the gas
pressure to the burner.
6. After high pressure has been checked, check low
pressure regulation. Two-stage appliance operat-
ing sequences vary. Consult the appliance manu-
facturers instructions for the specific operating
sequence and regulator adjustment procedure for
the appliance in which the control is installed and
for instructions on how to prevent the control from
moving to high stage while checking the low pres-
sure regulator setting.
7. Check the low rate manifold pressure listed on the
appliance nameplate. Gas control low rate outlet
pressure should match this rating.
8. With main burner operating, check the gas control
flow rate as before (using the meter clocking
method or check pressure using a manometer con-
nected to the outlet pressure tap on the control).
9. If necessary, adjust the low pressure regulator to
match the appliance rating. See Table 6 and 7 for
factory-set nominal outlet pressure and adjust-
ment range.
a. Remove the pressure regulator adjustment cap
(Fig. 3). Using a screwdriver, turn the inner
adjustment screw for LO pressure clockwise
to increase or counterclockwise to
decrease the gas pressure to the burner.
10. Once high and low pressure have been checked
and adjusted, replace pressure regulator adjust-
ment cap. If the desired outlet pressure or flow rate
cannot be achieved by adjusting the gas control,
check the control inlet pressure using a manome-
ter at the inlet pressure tap of the control. If the
inlet pressure is in the nominal range (see Table 6
and 7), replace the gas control. Otherwise, take the
necessary steps to provide proper gas pressure to
the control.
aLow Fire setting range for VR8304Q 1/2 in. by 1/2 in. and 1/2 in. by 3.4 in. is 1.5 to 3.0 in. wc.
aLow Fire setting range for VR8304Q 1/2 in. by 1/2 in. and 1/2 in. by 3.4 in. is 0.37 to 0.75 kPa.
Table 6. Pressure Regulator Specification Pressures for Standard-Opening Natural Gas.
Model Type
Type of
Gas
Nominal Inlet
Pressure Range
Factory Set Nominal Outlet
Pressure Setting Range
Step Full Rate Step Full Rate
Standard,
Slow
NAT 5.0 to 7.0 — 3.5 — 3.0 to 5.0
LP 12.0 to 14.0 — 10.0 — 8.0 to 12.0
Step NAT 5.0 to 7.0 0.9 3.5 None 0.7 to 1.7
LP 12.0 to 14.0 2.2 10.0 None 1.4 to 5.5
Two-Stage NAT 5.0 to 7.0 — 1.7 Low
3.5 High
—0.9 to 3.0 Lowa
3.0 to 5.0 High
LP 121.0 to 14.0 — 4.9 Low
10.0 High
— 2.5 to 7.0 Low
8.0 to 11.0 High
Table 7. Pressure Regulator Specification Pressures (kPa).
Model Type
Type of
Gas
Nominal Inlet
Pressure Range
Factory Set Nominal Outlet
Pressure Setting Range
Step Full Rate Step Full Rate
Standard,
Slow
NAT 1.2 to 1.7 — 0.9 — 0.7 to 1.2
LP 2.9 to 3.9 — 2.5 — 2.0 to 3.0
Step NAT 1.2 to 1.7 0.2 0.9 None 0.7 to 1.7
LP 2.9 to 3.9 0.5 2.5 None 1.4 to 5.5
Two-Stage NAT 1.2 to 1.7 — 0.48 Low
0.9 High
—0.22 to 0.75 Lowa
0.75 to 1.2 High
LP 2.9 to 3.9 — 1.2 Low
2.5 High
— 0.6 to 1.8 Low
2.0 to 2.5 High

VR8245 AND VR8345 ELECTRONIC IGNITION GAS CONTROLS
11 69-2013—04
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.
NOTES: Read steps 1 through 7 below before starting
and compare to the safety shutdown or safety
lockout tests recommended for the intermittent
pilot (IP), hot surface (HSI) or direct spark (DSI)
module. When different, use the procedure rec-
ommended for the module.
1. Turn off gas supply.
2. Set the thermostat or controller above room
temperature to call for heat.
3. • Intermittent Pilot Ignition—Watch for an
ignition spark at pilot burner either immedi-
ately or following prepurge. See ignition
module specifications.
• Hot Surface or Direct Spark Ignition —Watch
for an ignition spark or glow at hot surface
igniter either immediately or following pre-
purge. See ignition module specifications.
4. If module has timed ignition, time the length
of the igniter operation. See ignition module
specifications.
5. • Intermittent Pilot Ignition—After the module
locks out, turn on gas supply and make
sure there is no gas flow to the pilot or main
burner.
NOTE: With modules that continue spark until pilot
lights or system is shut down manually, pilot
should light when gas supply is turned on.
• Hot Surface or Direct Spark Ignition —After
the module locks out, turn on gas supply and
assure there is no gas flow to main burner.
6. Set the thermostat below room temperature
and wait at least 45 seconds to reset system.
7. Operate system through one complete cycle
to make sure all controls operate properly.
MAINTENANCE
WARNING
FIRE OR EXPLOSION HAZARD
CAN CAUSE PROPERTY DAMAGE, SEVERE
INJURY, OR DEATH
Improper cleaning or reassembly can cause gas
leakage. When cleaning, be sure that the control
is reassembled properly and perform gas leak
test.
Regular preventive maintenance is important in
applications such as commercial cooking, agricultural
and industrial operations that place a heavy load on
system controls because:
• In many such applications, particularly commercial
cooking, the equipment operates 100,000 to 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
checkout of the gas control; see Startup and Checkout
section. To check out the control system, see 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
cost of an unexpected shutdown would be high, the
system should be checked more often.
•Dusty, wet, or corrosive environment. Since these
environments can cause the gas control to deteriorate
more rapidly, the system should be checked more
often.
NOTE: If the gas control will be exposed to high ammo-
nia conditions, e.g., those used in greenhouses
or animal barns, contact your Resideo sales
representative to request a gas control with cor-
rosion resistant construction.
The gas control should be replaced if:
• It does not perform properly during checkout or
troubleshooting.
• The gas control knob is hard to turn or push down.
• 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
Do not apply a jumper across or short the valve
coil terminals. Doing so can burn out the heat
anticipator in the thermostat or damage the
ignition module.
If Main Burner Will Not Come On With Call
For Heat
1. Make sure the gas control knob is in the ON posi-
tion.
2. Adjust thermostat several degrees above room
temperature.
3. Using an ac voltmeter, check for voltage at gas
control.
•Intermittent Pilot Ignition—If pilot lights, mea-
sure voltage across MV/PV and MV. If pilot
does not light, measure across MV/PV and PV
before safety lockout occurs.
•Hot Surface or Direct Spark Ignition—Measure
voltage across MV terminals at gas control.

VR8245 AND VR8345 ELECTRONIC IGNITION GAS CONTROLS
© 2020 Resideo Technologies, Inc. All rights reserved.
This product is manufactured byResideo Technologies, Inc. and its affiliates.
www.resideo.com
Resideo Technologies, Inc.
1985 Douglas Drive North, Golden Valley, MN 55422
1-800-468-1502
69-2013—04 M.S. Rev. 05-20 | Printed in United States
4. If voltage is not present, check control circuit for
pro-per operation.
5. If proper control circuit voltage is present, replace
gas control.
Instructions To The Homeowner
(For Your Safety, Read Before Operating)
WARNING
FIRE OR EXPLOSION HAZARD
CAN CAUSE PROPERTY DAMAGE, SEVERE
INJURY, OR DEATH
Follow these warnings exactly:
1. Pilot/main burner flame is lit automatically. Do
not light the pilot/main burner flame manually.
2. Before lighting appliance, smell around the
appliance for gas. Be sure to smell next to the
floor because LP gas is heavier than air.
3. IF YOU SMELL GAS:
• Turn off the gas supply at the appliance
service valve. On LP gas systems, turn off
gas supply at the gas tank.
• Do not light any appliances in the house.
• Do not touch electrical switches or use
phone.
• Leave the building and use a neighbor’s
phone to call your gas supplier.
• If you cannot reach your gas supplier, call
the fire department.
4. Do not force the gas control knob. Use only
your hand to push down or turn the gas
control knob. Never use any tools. If the gas
control knob will not operate by hand, call a
qualified service technician to replace the gas
control. Force or attempted repair can result in
a fire or explosion.
5. Call a qualified service technician to replace
the gas control if it has been flooded with
water.
6. Call a qualified service technician to replace
the gas control in the event of any physical
damage, tampering, bent terminals, missing or
broken parts, stripped threads, or evidence of
exposure to heat.
IMPORTANT:
Follow the operating instructions provided by
the manufacturer of your heating appliance.
The information below will be of assistance in a
typical gas control application, but the specific
controls used and the procedures outlined by
the manufacturer or your appliance may differ
and require special instructions.
To Turn On The Appliance
Stop: Read the warnings on page 8.
The pilot/main burner flame is lit automatically. Do not
attempt to manually light the pilot. If the appliance does
not turn on when the thermostat is set several degrees
above room temperature, follow these instructions:
1. Set the thermostat to its lowest setting to reset
the safety control.
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.
5. Wait five minutes to clear out any unburned gas. If
you then smell gas, STOP! Follow step 3 of the
Warning in the Instructions To The Homeowner
section. If you do not smell gas, continue with the
next step.
6. Turn the gas control knob counterclockwise to
ON.
7. Replace the gas control access panel.
8. Reconnect all electric power to the appliance.
9. Set the thermostat to the desired setting.
10. If the appliance does not turn on, set the gas con-
trol knob to OFF and contact a qualified service
technician for assistance.
Turning Off The Appliance
VACATION SHUTDOWN—Set the thermostat to the
desired room temperature while you are away.
COMPLETE SHUTDOWN—Push in the gas control knob
slightly and turn clockwise to OFF. Do not force.
Appliance will completely shut off. Follow the
Instructions to the Homeowner above to resume normal
operation.