resideo VR4200 User manual

INSTALLATION INSTRUCTIONS
69-0682-02
VR4200
CONTINUOUS PILOT COMBINATION GAS CONTROLS
APPLICATION
These continuous pilot combination gas controls are
used in gas-fired appliances up to 200 cfh capacity of
natural gas. They include safety shutoff, a manual valve,
two automatic operators, a pressure regulator, a pilot
adjustment and a conduit cover. Body pattern is
straight-through with 1/2 in. inlet and 1/2 in. outlet.
Some models include two optional 1/4 in. quick-connect
convenience terminals.
Refer to Table 1 for temperature ranges and regulator
types. If a 7 follows the suffix letter in the model number,
the unit includes an ECO connector with two 1/4 in.
quick-connect terminals.
Flange kits include one flange with attached O-ring, four
mounting screws, a 9/64 in. hex wrench and
Instructions.
Controls are factory-set for natural (and manufactured)
or LP gas. Do not attempt to use a control set for natural
(manufactured) gas on LP gas, or a control set for LP
gas on natural (manufactured) gas.
Controls with standard or slow opening regulators can
be converted from one gas to the other with a
conversion kit (ordered separately). Order part no.
393691 to convert from natural (manufactured) to LP
gas; order part no. 394588 to convert from LP to natural
(manufactured) gas. Controls with step opening
regulators cannot be converted.
GAS CONTROL KNOB POSITIONS: OFF-PILOT-ON.
BODY PATTERN: Straight-through.
INLET X OUTLET SIZES AVAILABLE: 1/2 x 1/2 inch.
ADAPTERS: Adapters are available for 1/2 and 3/4 inch
straight and angle connections. Refer to Table 2.
ELECTRICAL RATINGS:
Voltage and Frequency: 120 Vac, 60 Hz.
Thermostat Heat Anticipator Setting: 0.1A.
Current Draw: 0.1A.
APPROVALS:
American Gas Association design certificate: UP-70-57A.
Canadian Gas Association design certificate: 1029-CC-8375.
Australian Gas Association design certificate: 4214.
Approved for Delta C applications.
Table 1. Model number suffix letter designation.
Table 2. Adapter (flange) part numbers.
aElbow (angle) flanges cannot provide right hand inlet
when the ECO connector is used.
NOTE: Flange kits include one flange with attached
O-ring and four mounting screws.
INSTALLATION
WHEN INSTALLING THIS PRODUCT…
1. Read 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 make sure 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
Model No.
Suffix Letter
Ambient
Temperature Range Regulator Type
A
0 to 175 °F
(-18 to 79 °C)
Standard
C Step-opening
H Slow-opening
M-40 to 175 °F
(-40 to 79 °C)
Standard
P Step-opening
Inlet/Outlet
Pipe Size
Flange
Type
Less Hex
Wrench
Part No. With
Hex Wrench
3/8 in. NPT Straight 393690-1 393690-11
1/2 in. NPT Elbowa393690-2 393690-12
Straight 393690-6 393690-16
3/4 in. NPT
Elbowa393690-3 393690-13
Straight 393690-4 393690-14
Elbowa393690-5 393690-15

VR4200
69-0682—02 2
WARNING
FAILURE TO FOLLOW THESE WARNINGS COULD
RESULT IN A FIRE OR EXPLOSION WITH
PROPERTY DAMAGE, PERSONAL INJURY OR
LOSS OF LIFE.
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. Do not bend pilot tubing at control or pilot after
compression nut has been tightened, or 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 push down the reset button or
turn the gas control knob. Never use any tools.
If the knob or reset button will not operate by
hand, replace the control using a qualified
service technician. Force or attempted repair
may result in fire or explosion.
CAUTION
1. Never apply a jumper across or short the valve
coil terminals. This may burn out the heat
anticipator in the thermostat.
2. When a gas control is installed external to the
appliance, a conduit cover must be installed.
IMPORTANT
1. These gas controls are shipped with protective
seals over inlet and outlet tappings. Do not
remove seals until ready to connect piping.
2. When a gas control is installed external to the
appliance, a conduit cover MUST be installed.
Make sure that the conduit cover is placed over
the flange before rotating the conduit cover into
position.
Follow the appliance manufacturer’s instructions if
available; otherwise, use the instructions provided below
as a guide.
CONVERTING CONTROL FROM NATURAL GAS TO LP GAS
APPLICATION (OR LP GAS TO NATURAL GAS
APPLICATION)
WARNING
FIRE OR EXPLOSION HAZARD CAN CAUSE
PROPERTY DAMAGE, SEVERE INJURY OR DEATH
Always change the main and pilot burner orifices
when converting from natural gas to LP gas or
from LP gas to natural gas. Follow appliance
manufacturer’s specifications and instructions.
Controls with standard or slow opening
regulators can be converted from one gas to the
other with a conversion kit (order separately).
Order part no. 393691 to convert from natural
(manufactured) to LP gas; order part no. 394588
to convert from LP to natural (manufactured) gas.
Controls with step opening regulators cannot be
converted.
INSTALL ADAPTERS TO CONTROL
If adapters are to be installed on the gas control, mount
them as follows:
Flanges
1. Choose the appropriate flange for your application.
NOTE: A right angle inlet flange cannot be used with
ECO connected.
2. Remove seal over control inlet or outlet.
3. Check to assure that the O-ring is fitted in the
groove of flange. If the O-ring is not attached or is
missing, do not use the flange.
4. With O-ring facing valve, align the screw holes on
the control with the holes in the flange. Insert and
tighten the screws provided with the flange. See
Fig. 1. Tighten the screws to 25 inch pounds of
torque to provide a gas-tight seal.
Bushings
1. Remove seal over control inlet or outlet.
2. Apply moderate amount of good quality pipe
compound to bushing, leaving two end threads
bare. On LP installation, use compound resistant to
LP gas. Do not use Teflon tape.
3. Insert bushing in control and carefully thread pipe
into bushing until tight.
Complete 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 on the control.
Fig. 1. Fasten flange to valve firmly, but do not
overtighten screws.
LOCATION
The combination gas control is mounted in the appliance
vestible on the gas manifold. If this is a replacement
application, mount the gas control in the same location
as the old control.
Do not locate the gas control where it may be affected by
steam cleaning, high humidity, dripping water, corrosive
chemicals, dust or grease accumulation, or excessive
heat. To assure 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.
• Assure the ambient temperature does not exceed the
ambient temperature ratings for each component.
• Cover the gas control if appliance is cleaned with
water, steam, or chemicals to avoid dust and grease
accumulation.
• Avoid locating gas control where exposure to
corrosive chemical fumes or dripping water is
possible.
M3081A
VALVE OUTLET
FLANGE
9/64 INCH HEX SCREWS (4)
CONDUIT
COVER
6/32 INCH ROUND
SCREWS (1)

VR4200
369-0682—02
Install Piping to Control
All piping must comply with local 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. All tubing bends must be
smooth and without deformation.
2. Run pipe or tubing to the control. If tubing is used,
obtain a tube-to-pipe coupling to connect the
tubing to the control.
3. Install sediment trap in the supply line to the gas
control. See Fig. 2.
Fig. 2. Sediment trap installation.
Install Control
1. This control can be mounted 0-90 degrees, in any
direction including vertically, from the upright
position of the gas control knob.
2. Mount the control so gas flow is in the direction of
the arrow on the bottom of the control.
3. Thread pipe the amount shown in Table 3 for
insertion into control. Do not thread pipe too far.
Valve distortion or malfunction may result if the
pipe is inserted too deeply.
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. See Fig. 3.
Table 3. NPT pipe thread length in inches.
5. Remove seals over control inlet and outlet, if
necessary.
6. Connect pipe to control inlet and outlet. Use
wrench on the square ends of the control. If a
flange is used, place wrench on flange rather than
control. Refer to Figs. 4 and 5.
Fig. 3. Use moderate amount of pipe compound.
Fig. 4. Top view of 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 at
control after compression fitting has been
tightened because this can result in gas leakage at
the connection.
2. Square off and remove burrs from end of tubing.
3. Unscrew compression fitting from the pilot outlet.
See Fig. 4. Slip the fitting over the tubing and slide
out of the way.
NOTE: When replacing a control, cut off old
compression fitting and replace with the
compression fitting provided on the
combination gas control. Never use the old
compression fitting because it may not provide
a gas-tight seal. See Fig. 6.
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
M3077C
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.
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
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).
M3075D
PIPE
OUTLET
PRESSURE
TAP
INLET OUTLET
WIRING
TERMINALS (2)
INLET
PRESSURE TAP
PRESSURE REGULATOR
ADJUSTMENT
(UNDER CAP SCREW)
PILOT OUTLET
PILOT ADJUSTMENT
(UNDER CAP SCREW)
GAS
CONTROL
KNOB
M3093A
RED
RESET
BUTTON
THERMOCOUPLE
CONNECTION

VR4200
69-0682—02 4
Fig. 5. Proper use of wrench on gas control with and without flanges.
4. 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 fitting into place, engage
threads and turn until finger tight. Then tighten one
more turn with wrench. Do not overtighten.
5. Connect other end of tubing to pilot burner
according to pilot burner manufacturer’s
instructions.
Fig. 6. Always use new compression fitting.
Connect Thermocouple
If a supplementary limit or energy cutoff will be used,
insert the ECO connector (order part no. 393200-1) as
shown in Fig. 7 and then connect thermocouple lead. If
not used, insert thermocouple lead directly. 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
Follow the wiring instructions furnished by the appliance
manufacturer, if available, or use the general instructions
provided below. Where these instructions differ from the
appliance manufacturer’s, follow the appliance
manufacturer’s instructions.
Fig. 7. Installing thermocouple and optional ECO adapter
to the power unit.
All wiring, including 1/4 in. quick-connect terminals,
must comply with applicable electrical codes and
ordinances.
Disconnect power supply before making wiring
connections to prevent electrical shock or equipment
damage.
1. Check the power supply rating on the valve and
make sure it matches the available supply. Install
thermostat and other controls as required.
APPLY WRENCH
FROM TOP OR
BOTTOM OF GAS
CONTROL TO
EITHER SHADED AREA
WHEN FLANGE IS NOT USED
APPLY WRENCH
TO FLANGE ONLY
WHEN FLANGE IS USED
M3079B
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.
M3095C
1

VR4200
569-0682—02
Fig. 8. Wiring connections for 120 volt control.
2. When the gas control is installed external to the
appliance, install the conduit cover on the conduit
fitting. Do not secure conduit cover at this time.
3. Connect control circuit to gas control terminals.
See Figs. 4 and 8.
NOTE: Use leadwires with insulated terminals.
4. Make sure the conduit cover is in position and
secured to the gas valve with the screw provided.
See Fig. 1.
5. Adjust thermostat heat anticipator as instructed in
appliance manual (i.e., usually 0.1A).
Connect Supplementary Limit or ECO (If Used)
The leadwires from the high limit or ECO must be
equipped with insulated 1/4 in. female quick-connect
terminals. Leadwire lengths must not exceed the lengths
shown in Tables 4 and 5. Connect the high-limit or ECO
leadwires to the two terminals on the ECO connector.
Table 4. Maximum length of supplementary limit leadwires when using Q340A thermocouple.
Table 5. Maximum length of supplementary limit leadwires when using Q309A thermocouple.
120V
THERMOSTAT
POWER SUPPLY. PROVIDE DISCONNECT MEANS
AND OVERLOAD PROTECTION AS REQUIRED.
DO NOT JUMPER THESE TERMINALS. THIS
SHORTS VALVE COIL AND MAY BURN OUT
ANTICIPATOR IN THERMOSTAT.
OPTIONAL HIGH LIMIT.
L1
(HOT)
L2
HIGH LIMIT
CONTROLLER
M3092B
GAS CONTROL
TERMINALS
L2
L1
1
1
2
2
3
3
Thermocouple Length
Maximum Leadwire Length x 2 (Wires)
AWG No. 14 AWG No. 16 AWG No. 18
Inch Meter Inch Meter Inch Meter Inch Meter
120.3411.0260.7160.4
180.5350.9220.6130.3
240.6290.7180.5110.3
300.8230.6150.4 9 0.2
360.9170.4110.3 6 0.2
401.0130.3 8 0.2
48 1.2
Do not use.
54 1.4
60 1.5
72 1.8
Thermocouple Length
Maximum Leadwire Length x 2 (Wires)
AWG No. 14 AWG No. 16 AWG No. 18
Inch Meter Inch Meter Inch Meter Inch Meter
120.3471.2300.8180.5
180.5411.0260.7160.4
240.6350.9220.6140.4
300.8290.8180.5110.3
360.9230.6150.4 9 0.2
401.0190.5120.3 7 0.2
481.2110.3 7 0.2
54 1.4
Do not use.60 1.5
72 1.8

VR4200
69-0682—02 6
STARTUP AND CHECKOUT
WARNING
FORCE OR ATTEMPTED REPAIR CAN RESULT IN
FIRE OR EXPLOSION WITH PROPERTY DAMAGE,
PERSONAL INJURY OR LOSS OF LIFE.
1. Do not force the gas control knob on the
appliance. Use only your hand to push down
the reset button or turn the gas control knob.
Never use any tools.
2. If the knob or reset button will not operate by
hand, or if the reset button stays depressed
after it is released, replace the control using a
qualified service technician.
GAS CONTROL KNOB SETTINGS
Gas control knob settings are as follows:
OFF: Prevents pilot and main gas flow through the
control.
PILOT: Permits gas to flow to the pilot burner as long as
red knob is held down or thermocouple current
is above the power unit dropout value.
ON: Permits gas to flow into the control body. Pilot
gas is controlled as in the PILOT position. Main
burner gas flow is controlled by the thermostat
and automatic valve operator(s).
NOTE: Valves 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 soap and water solution
any time work is done on a gas system.
GAS LEAK TEST:
1. Paint pipe connections upstream of gas control
with rich soap and water solution. Bubbles indicate
gas leak.
2. If leak is detected, tighten pipe connections.
3. Stand clear of main burner while lighting to prevent
injury caused from hidden leaks that could cause
flashback in the appliance vestibule. Light main
burner.
4. With main burner in operation, paint pipe joints
(including adapters) and control inlet and outlet
with rich soap and water solution.
5. If another leak is detected, tighten adapter screws,
joints, and pipe connections.
6. Replace part if leak cannot be stopped.
LIGHT PILOT
1. Rotate the gas control knob clockwise to OFF.
Wait five minutes to allow any unburned gas to
dissipate. Sniff around the appliance near the floor.
Do not relight if you smell gas.
2. Rotate the gas control knob counterclockwise
to PILOT. Push down and hold the red reset
button while you light pilot burner according to
appliance manufacturer’s instructions.
3. After about one minute, release reset button. Pilot
should remain lit. If it goes out, turn gas control
knob clockwise to OFF. To relight, repeat
steps 1-3.
4. When pilot remains lit when red reset button is
released, turn gas control knob counterclockwise
to ON.
TURN ON MAIN BURNER
Follow instructions provided by appliance manufacturer
or turn up thermostat to call for heat.
ADJUST PILOT FLAME
The pilot flame should envelop 3/8 in. to 1/2 in. [10 to
13 mm] of the tip of the thermocouple. See Fig. 9.
1. Remove pilot adjustment cover screw. See Fig. 4.
2. Turn inner adjustment screw clockwise to
decrease or counterclockwise to increase
pilot flame.
3. Replace cover screw after adjustment to prevent
gas leakage.
Fig. 9. Proper flame adjustment.
CHECK AND ADJUST GAS INPUT AND
BURNER IGNITION
CAUTION
1. Do not exceed input rating stamped on
appliance nameplate, or manufacturer’s
recommended burner orifice pressure for size
orifice(s) used. Make certain primary air supply
to main burner is properly adjusted for
complete combustion. Follow instructions of
appliance manufacturer.
2. IF CHECKING GAS INPUT BY CLOCKING GAS
METER: Make certain there is no gas flow
through the meter other than to the appliance
being checked. Other appliances must remain
off with their pilots extinguished (or their
consumption must be deducted from the meter
reading). Convert flow rate to Btuh as
described in form 70-2602, Gas Controls
Handbook, and compare to Btuh input rating
on appliance nameplate.
3. IF CHECKING GAS INPUT WITH MANOMETER:
Be sure gas control is in PILOT position before
removing outlet pressure tap plug to connect
manometer (pressure gauge). Also turn gas
control knob back to PILOT when removing
gauge and replacing plug. Before removing
inlet pressure tap plug, shut off gas supply at
the manual valve in the gas piping to the
appliance or, for LP, at the tank. Also shut off
gas supply before disconnecting manometer
and replacing plug. Repeat Gas Leak Test at
plug with main burner operating.
M3086C
PROPER FLAME
ADJUSTMENT
3/8 TO 1/2 IN.
(10 TO 13 MM)
THERMOCOUPLE

VR4200
769-0682—02
Standard Pressure Regulator
1. Check the manifold pressure listed on the
appliance nameplate. Gas control outlet pressure
should match the nameplate.
2. With main burner operating, check gas control flow
rate using the meter clocking method or check
pressure using a manometer connected to the
outlet pressure tap on the gas control. See Fig. 4.
3. If necessary, adjust pressure regulator to match
appliance rating. See Table 6 for factory set
nominal outlet pressure and adjustment setting
range.
a. Remove pressure regulator adjustment cap
screw.
b. Using a screw driver, turn inner adjustment
screw clockwise to increase or
counterclockwise to decrease gas
pressure to the burner.
c. Always replace cap screw and tighten firmly to
prevent gas leakage.
4. If desired outlet pressure or flow rate cannot be
achieved by adjusting the gas control, check gas
control inlet pressure using a manometer at the
gas control inlet pressure tap. If inlet pressure is in
the nominal range (see Table 6), replace gas
control. Otherwise, take the necessary steps to
provide proper gas pressure on the control.
Slow-opening and Step-opening Pressure Regulators
1. Check the full rate manifold pressure listed on the
appliance nameplate. Gas control full rate outlet
pressure should match this rating.
2. With main burner operating, check gas control flow
rate using the meter clocking method or check
pressure using a manometer connected to the
outlet pressure tap on the gas control. See Fig. 4.
3. If necessary, adjust pressure regulator to match
appliance rating. See Table 6 for factory set
nominal outlet pressure and adjustment setting
range.
a. Remove pressure regulator adjustment cap
screw.
b. Using a screw driver, turn inner adjustment
screw clockwise to increase or
counterclockwise to decrease gas
pressure to the burner.
c. Always replace cap screw and tighten firmly to
prevent gas leakage.
4. 4. If desired outlet pressure or flow rate cannot be
achieved by adjusting the gas control, check gas
control inlet pressure using a manometer at the
gas control inlet pressure tap. If inlet pressure is in
the normal range (see Tables 6 and 7), replace gas
control. Otherwise, take the necessary steps to
provide proper gas pressure to the control.
5. STEP-OPENING PRESSURE REGULATORS ONLY.
Carefully check burner lightoff at step pressure.
Make sure burner lights smoothly and without
flashback to orifice. Make sure all ports remain lit.
Cycle burner several times, allowing at least 30
seconds between cycles for regulator to resume
step function. Repeat after allowing burner to cool.
Readjust full rate outlet pressure, if necessary, to
improve lightoff characteristics.
Table 6. Pressure Regulator Specification Pressures in in. wc.
Table 7. Pressure Regulator Specification Pressures in kPa.
CHECK SAFETY SHUTDOWN PERFORMANCE
WARNING
PERFORM THE SAFETY SHUTDOWN TEST ANY
TIME WORK IS DONE ON A GAS SYSTEM TO
AVOID THE POSSIBILITY OF FIRE OR EXPLOSION
AND PROPERTY DAMAGE, PERSONAL INJURY
OR LOSS OF LIFE.
1. Place gas control knob in PILOT position. Main
burner should go off and pilot should remain lit.
2. Extinguish pilot flame. Pilot gas flow should stop
within 2-1/2 minutes. Safety shutoff of pilot gas
proves complete shutdown because safety shutoff
valve blocks flow of gas to main burner and pilot.
3. Relight pilot burner and operate system through
one complete cycle to make sure all controls
operate properly.
Model Type
Type of
Gas
Nominal Inlet
Pressure Range
Factory Set Nominal
Outlet Pressure Setting Range
Step Full Rate Step Full Rate
Standard,Slow Natural 5.0 - 7.0 - 3.5 - 3 - 5
LP 12.0 - 14.0 - 10.0 - 8 - 12
Step Natural 5.0 - 7.0 0.9 3.5 None 3 - 5
LP 12.0 - 14.0 2.2 10.0 None 8 - 12
Model Type
Type of
Gas
Nominal Inlet
Pressure Range
Factory Set Nominal
Outlet Pressure Setting Range
Step Full Rate Step Full Rate
Standard, Slow Natural 1.2 - 1.7 - 0.9 - 0.7 - 1.2
LP 2.9 - 3.9 - 2.5 - 2 - 3
Step Natural 1.2 - 1.7 0.2 0.9 None 0.7 - 1.2
LP 2.9 - 3.9 0.5 2.5 None 2 - 3

VR4200
69-0682—02 8
SERVICE
WARNING
DO NOT TAKE THIS CONTROL APART; IT
CONTAINS NO REPLACEABLE COMPONENTS.
ATTEMPTED DISASSEMBLY OR REPAIR CAN
DAMAGE THE CONTROL, RESULTING IN DANGER
OF FIRE OR EXPLOSION WITH PROPERTY
DAMAGE, PERSONAL INJURY OR LOSS OF LIFE.
CAUTION
Do not apply a jumper across (or short) the valve
coil terminals, even temporarily. Doing so may
burn out the heat anticipator in the thermostat.
IF PILOT WILL NOT LIGHT
1. Make sure the main gas supply valve is open and
the pilot gas supply line is purged of air.
2. Attempt to light pilot following procedure in Light
Pilot section.
3. If pilot will not light, check for:
a. closed pilot gas adjustment screw.
b. clogged pilot burner tubing or orifice.
c. gas leak at compression fitting.
IF PILOT GOES OUT WHEN RESET BUTTON
IS RELEASED
1. Assure the reset button is held in at least one
minute to allow the thermocouple time to heat.
2. Check pilot flame adjustment, see Adjust Pilot
Flame section.
3. Check the connection to the power unit. This is an
electrical connection and must be clean and
secure.
4. If pilot continues to go out, use a millivoltmeter to
measure the exact open and closed circuit output
voltages of the thermocouple. Compare to
acceptable range charts in the thermocouple
specifications. Replace the thermocouple if
voltages are outside the acceptable range;
otherwise, replace the gas control.
IF MAIN BURNER WILL NOT COME ON WITH
CALL FOR HEAT
1. Confirm that gas control knob is in the ON position.
2. Adjust thermostat several degrees above room
temperature.
3. Using AC voltmeter, measure voltage across
thermostat terminals at gas control.
4. If no voltage is present, check control circuit for
proper operation.
5. If proper control system voltage is present, replace
gas control.
INSTRUCTIONS TO THE HOMEOWNER FOR
YOUR SAFETY READ BEFORE LIGHTING
WARNING
IF YOU DO NOT FOLLOW THE WARNINGS BELOW
AND THE LIGHTING INSTRUCTIONS EXACTLY, A
FIRE OR EXPLOSION CAN RESULT WITH
PROPERTY DAMAGE, PERSONAL INJURY OR
LOSS OF LIFE.
1. Before lighting, smell all around the appliance
area for gas. If the appliance uses LP (bottled)
gas, also be sure to smell next to the floor
because LP gas is heavier than air. If you smell
gas, immediately shut off the manual valve in
the gas piping to the appliance or, ON LP, AT
THE TANK. Do not try to light any appliance. Do
not touch any electrical switch or use the
phone. LEAVE THE BUILDING and call your gas
supplier. If your gas supplier cannot be
reached, call the fire department.
2. Do not force the gas control knob on the
appliance. Use only your hand to push down
the reset button or turn the gas control knob.
Never use any tools. If the knob or reset button
will not operate by hand, replace the control
using a qualified service technician. Force or
attempted repair can result in fire or explosion.
3. The gas control must be replaced if it has been
flooded with water. Call a qualified service
technician.
4. If the red reset button stays depressed after it
is released, replace the gas control.
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 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 control application, but the specific
controls used and the procedures outlined by
the manufacturer of your appliance may differ,
and require special instructions.
TO LIGHT THE PILOT BURNER
STOP: Read the safety information above.
This appliance has a pilot burner, which must be lit by
hand. If the pilot flame has gone out, follow these
instructions exactly:
1. Set thermostat to lowest setting and shut off
electric power to appliance.
2. Remove burner access panel if provided on your
appliance.
3. Turn gas control knob (Fig. 4) clockwise to
OFF position.
4. Wait five minutes to allow any gas in the
combustion chamber to vent. If you then smell gas
in the appliance area or near the floor in an LP
installation, immediately shut off the manual valve
in the gas piping to the appliance or, WITH LP,
SHUT OFF AT THE TANK. Do not touch any
electrical switch or use the phone. LEAVE THE
BUILDING and call your gas supplier. If your gas
supplier cannot be reached, call the fire
department. Failure to do so may result in fire or
explosion.

VR4200
969-0682—02
5. If you do not smell gas, turn knob on gas control
counterclockwise to PILOT.
6. Push and hold down red reset button (Fig. 4) while
you light the pilot burner. Continue to hold the reset
button down for about one minute after the pilot is
lit. Release button; pilot should remain lit. If it goes
out, repeat steps 3-6. If the reset button does not
pop up when released, stop immediately and call
your service technician or gas supplier. If pilot will
not remain lit after several tries, turn gas control
knob to OFF and call your service technician or gas
supplier.
7. When pilot remains lit, turn gas control knob
counterclockwise to ON.
8. Replace burner access panel.
9. Turn on power.
10. Set thermostat to desired temperature.
TO TURN OFF APPLIANCE
VACATION SHUTDOWN:Turn gas control knob clockwise
from ON to PILOT. Pilot will remain lit, ready for
return to normal service without relighting.
COMPLETE SHUTDOWN: Turn gas control knob
clockwise to OFF. Both pilot and main burner are
shut off. The pilot must be manually relit when normal
burner operation is desired.

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VR4200
© 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
69-0682—02 M.S. Rev. 06-20 | Printed in United States