resideo WV4262B User manual

INSTALLATION INSTRUCTIONS
69-2496-05
WV4262B Powered Damper Water
Heater Controls
APPLICATION
The WV4262B Water Heater Control System is designed
for power damper water heater applications.
The WV4262B provides these features:
• Gas regulation and manual valve features
• Intermittent spark-to-pilot ignition
• Flame supervision using flame rectification sensing
through the spark rod. This flame sense circuit uses
patented technology to create a robust sensing
signal that is independent of AC line polarity and
appliance earth grounding.
• Water temperature sensing using solid state sensors
potted in a submersion well assembly
• Manually resettable High Temperature Cutout (TCO)
• Damper motor control with position sensing
• Variable resistance flammable vapor sensor with a
sensing and control algorithm to provide automatic
shutdown when hydrocarbon vapors such as gasoline
are detected
• Retains up to 10 fault code histories in non-volatile
memory (available through the EnviraCOM™
communication port)
• Solid state setpoint adjustment over a factory preset
temperature range using a linear potentiometer to
provide high resolution adjustment
Special control features are available to address items
such as stacking. See a Resideo Product Specialist for
more information.
The specific application of the WV4262B System is the
responsibility of the appliance manufacturer. See the
Specifications below for temperature ranges and
regulator types. The WV4262B system refers to the
combination of the valve and the electronic control
module.
SPECIFICATIONS
IMPORTANT
WV4262B Controls provide direct replacement
only; do not substitute other models.
Body Pattern: 90 degree with 1/2 in. inlet and 1/2 in.
inverted flare outlet.
Natural gas model has right-hand threaded inverted
outlet.
LP gas model has left-hand threaded inverted outlet.
Mounting: Mounting in upright position only.
Electrical Tolerences:
Voltage Minimum: 18 VAC RMS, 60 Hz.
Voltage Maximum: 30 VAC RMS, 60 Hz.
Current in Running Mode: 0.3 Amps @ 24 VAC (plus
inducer motor draw)
Current in Idle Mode: 0.3 Amps Max @ 24 VAC
Damper Relay: 24 VAC RMS, 1 Amp Switching Current.
75,000 Cycles Life @ max load.
Capacity: See Table 1.
Conversion: Use conversion factors in Table 2 to convert
capacities for other gases.
Regulation Range (Btuh):
With 1/2 in. NPT inlet and 1/2 in. Inverted Flare Outlet:
Natural Gas:
Minimum: 30,000
Maximum: 100,000
LP Gas:
Minimum: 40,000.
Maximum: 100,000
Inlet Pressure Range:
See appliance rating plate for Inlet Pressure range rec-
ommendation
1/2 PSI (14.0" w. c.) maximum inlet pressure allowed for
proper operation.
Operational Environment:
Operating Ambient Temperature Range:
32 °F to 150 °F (0 °C to 65 °C)*
Shipping and Storage Temperature Range
-20 °F to 120 °F (-29 °C to 49 °C)
* Gas valve regulation range is guaranteed from 32 °F to
150 °F (0 °C to 66 °C)
Humidity:
95% Relative Humidity at 104 °F (40 °C).
Approvals:
This device is certified by CSA International to the fol-
lowing ANSI Standards (see report 158158-
1701693): Z21.20, Z21.23, Z21.35, Z21.78, Z21.87,
and Z21.94
Dimensions
See Fig. 2.

WV4262B POWERED DAMPER WATER HEATER CONTROLS
69-2496—05 2
Accessory Parts (Order Separately)
— Mounting Bracket:
P/N 50044631: 3/4” NPT, 1” insulation, 2” insertion.
P/N 50044362: 3/4” NPT, 2” insulation, 3” insertion.
— Pilot Assembly: P/N Q3451A (See a Resideo Product
Specialist for other options)
— TOD FVS (Therm-O-Disc) Flammable Vapor Sensor or
equivalent. Refer to specific OEM Water Heater
Service Manual for correct selection of sensor.
— See Resideo product specialist for other available
accessories.
Table 1. Capacity of WV4262B.
aCapacity based on 1000 Btu/ft3, 0.64 specific gravity natural gas at 1.47 in. wc pressure drop (37.3 MJ/meter3, 0.64
specific gravity natural gas at 0.37 kPa pressure drop).
bValves are guaranteed at only 77 percent of the rating.
Fig. 1. Typical capacity curve for WV4262B Family Water Heater Control System.
Table 2. Gas Capacity.
Model
Size (Inlet x Outlet),
in.
Capacity (at 1.47 in.
wc pressure dropa,b)
Minimum Regulated
Capacity
Maximum Regulated
Capacity
WV4262B 1/2 NPT x 1/2 inverted
flare 50 ft3/hr (3.7 m3/hr) 30 ft3/hr (0.6 m3/hr) 100 ft3/hr (5.1 m3/hr)
Gas Type Flow (kBTU/hr) Pressure Drop (in. w.c.)
NG
30 1.43
50 1.47
75 1.54
LP
30 0.91
50 0.94
75 0.97
CAPACITY
0
10
20
30
40
50
60
70
80
90
100
0.8 0.9 0.9 1.0 1.0 1.1 1.1 1.2 1.2 1.3
PRESSURE DROP
FLOW
M32315

WV4262B POWERED DAMPER WATER HEATER CONTROLS
369-2496—05
PLANNING THE INSTALLATION
WARNING
Fire or Explosion Hazard.
Can cause severe injury, death, or property
damage.
Follow these warnings exactly:
1. Plan the installation as outlined below.
2. Plan for frequent maintenance as described in
the Maintenance section (see page 8).
3. Review the following conditions that can apply
to your specific installation and take the
precautionary steps suggested.
Frequent Cycling
This control is designed for use on appliances that
typically cycle three to five times a day. In year-around
applications with cycling rates greater than 3,000 cycles
annually, the control can wear out more quickly. Perform
a monthly checkout.
Fig. 2. WV4262B dimensions in inches (mm).
Water or Steam Cleaning
If a control gets wet, replace it. If the appliance is likely to
be cleaned with water or steam, protect (cover) the
control and wiring from water or steam flow. Mount the
control high enough above the bottom of the tank so it
does not get wet during normal cleaning procedures.
High Humidity or Dripping Water
Dripping water can cause the control to fail. Never install
an appliance where water can drip on the control. In
addition, high ambient humidity can cause the control to
corrode and fail. If the appliance is in a humid
atmosphere, make sure air circulation around the control
is adequate to prevent condensation. Also, regularly
check out the system.
Corrosive Chemicals
Corrosive chemicals can attack the control, eventually
causing a failure. If chemicals are used for routine
cleaning, avoid contact with the control. Where
chemicals are suspended in air, as in some industrial or
agricultural applications, protect the control with an
enclosure.
Dust or Grease Accumulation
Heavy accumulations of dust or grease can cause the
control to malfunction. Where dust or grease can be a
problem, provide covers for the control to limit
contamination.
Heat
Excessively high temperatures can damage the control.
Make sure the maximum ambient temperature at the
control does not exceed the rating of the control. If the
appliance operates at very high temperatures, use
insulation, shielding, and air circulation, as necessary to
protect the control. Proper insulation or shielding should
be provided by the appliance manufacturer. Verify proper
air circulation is maintained when the appliance is
installed.
M32296
5-5/16 (135)
4-49/64
(121)
7-13/64 (183)

WV4262B POWERED DAMPER WATER HEATER CONTROLS
69-2496—05 4
INSTALLATION
When Installing this Product…
1. Read these instructions carefully. Failure to follow
them could damage the product or cause a
hazardous condition.
2. Check the ratings given in the instructions and on
the product to 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 severe injury, death, or property
damage.
Follow these warnings exactly:
1. 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.
2. Always install a sediment trap in gas supply
line to prevent contamination of ignition
system control.
3. Follow the appliance manufacturer
instructions if available; otherwise, use these
instructions as a guide.
WARNING
Scalding Hazard.
Can cause burns, severe injury, or death.
Always use a direct replacement sensor
assembly when replacing the temperature
sensor.
WARNING
Electrical Shock Hazard.
Can cause severe injury, death, or property
damage.
Disconnect power supply before making wiring
connections to prevent electrical shock or
equipment damage.
Location
The WV4262B is mounted on the outside of the water
heater tank. See Fig. 3.
Install Control to Water Tank
1. To install the water heater control, screw the
bracket and valve assembly into the spud until the
bracket is square. Use a maximum torque of 31 ft.
lb. plus one turn.
2. Connect the burner fill tube and tighten to 30 ft. lb.
torque.
3. Position compression fitting in pilot outlet and
engage threads. Turn until finger tight, then tighten
one more turn with a wrench. Do not overtighten.
Continue the installation with the steps in the Connect
Gas Supply section on page 5.
NOTE: The remaining electrical and control connec-
tions are described in the Wiring section on
page 6
IMPORTANT
These water heater system controls are shipped
in protective enclosures to prevent dust and
debris from entering the inlet and outlet tap-
pings. Do not remove the protections until ready
to connect the piping.
Fig. 3. Mounting the WV4262B on the water heater tank.
MOUNTING
BRACKET ASSEMBLY
ACCESS TO TANK
M32255A

WV4262B POWERED DAMPER WATER HEATER CONTROLS
569-2496—05
Connect Gas Supply
WARNING
Fire or Explosion Hazard.
Can cause severe injury, death, or property
damage.
Check for gas leaks with soap and water solution
any time work is done on a gas system.
Follow these warnings exactly:
1. IF YOU SMELL GAS:
a. Turn off the gas supply at the appliance service
valve. On LP gas systems, turn off the gas sup-
ply at the gas tank.
b. Do not light any appliances.
c. Do not touch electrical switches or use the
phone in the building.
d. Leave the building and use a phone to call the
gas supplier.
e. If you cannot reach the gas supplier, call the fire
department.
2. The water heater control must be replaced in event
of any physical damage, tampering, bent terminals,
missing or broken parts, stripped threads, or evi-
dence of exposure to heat.
CAUTION
Contamination Hazard.
Can cause the device to malfunction.
Do not use thread tape sealants to seal the gas
supply to the control.
a. Use a pipe compound to seal the inlet pipe
thread connection. On LP installations, use a
compound resistant to LP gas.
b. Use only ANSI approved compounds.
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. Ensure that the gas supply is turned off.
2. 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.
3. Run pipe or tubing to the water heater control. If
tubing is used, obtain a tube-to-pipe coupling to
connect the tubing to the control.
4. Install a sediment trap in the supply line to the
water heater control. See Fig. 4.
Table 3. NPT Pipe Thread Length (in.).
Fig. 4. Install a sediment trap in the supply line.
5. Apply a moderate amount of good quality pipe
compound, leaving two end threads bare. On LP
installations, use a compound resistant to LP gas.
See Fig. 5.
Fig. 5. Use moderate amount of pipe compound.
6. Remove the seals over the water heater control
inlet and outlet, if necessary.
7. Connect the pipe to the water heater control inlet to
a maximum of 40 ft-lb of torque. Use a wrench on
the square end of the water heater control. Refer to
Fig. 6.
a. Natural gas model is right-hand threaded
b. LP gas model is left-hand threaded
Pipe
Size
Thread Pipe This
Amount
Maximum Depth Pipe can
be inserted into Control
1/2 3/4 1/2
HORIZONTAL
DROP
PIPED
GAS
SUPPLY
3 IN.
(76 MM)
MINIMUM WV4262B
TUBING
GAS
SUPPLY
HORIZONTAL
DROP
3 IN.
(76 MM)
MINIMUM
RISER
M32297
1
1
WARNING
EXPLOSION HAZARD.
FAILURE TO FOLLOW PRECAUTIONS CAN
RESULT IN A GAS-FILLED WORK AREA.
SHUT OFF THE MAIN GAS SUPPLY BEFORE REMOVING END CAP.
TEST FOR GAS LEAKAGE WHEN INSTALLATION IS COMPLETE.
ALL BENDS IN METALLIC TUBING SHOULD BE SMOOTH.
WV4262B
TWO
IMPERFECT
THREADS
IGNITION
SYSTEM
CONTROL
THREAD PIPE THE AMOUNT
SHOWN IN TABLE 3 FOR INSERTION
INTO IGNITION SYSTEM CONTROL
A
PPLY A MODERATE AMOUNT OF
PIPE COMPOUND ONLY TO PIPE
(LEAVE TWO END THREADS BARE).
M24210
PIPE

WV4262B POWERED DAMPER WATER HEATER CONTROLS
69-2496—05 6
Fig. 6. Water heater controls.
Wiring
Follow the wiring instructions furnished by the appliance
manufacturer, if available, or use the general instructions
provided below. When these instructions differ from the
appliance manufacturer, follow the appliance
manufacturer instructions.
NOTE: All wiring must comply with applicable electrical
codes and ordinances.
WARNING
Electrical Shock Hazard.
Can cause severe injury, death, or property
damage.
Disconnect power supply before making wiring
connections to prevent electrical shock or
equipment damage.
Do NOT run the Control without the spark wire
installed and in place.
1. Place the Control’s ON/OFF switch in the OFF posi-
tion.
NOTE: Use Fig. 7 as a reference for the following con-
nections.
2. Connect the earth ground to the Control.
3. Connect the 6-wire electrical harness to the Con-
trol.
4. Connect the 4-wire flammable vapor sensor (TOD
FVS) to the Control.
5. Connect the Pilot Assembly lead to the Spark con-
nector.
Fig. 7. Wiring connections.
Fill Tank
1. Refer to the appliance manufacturer instructions to
fill the tank with water.
NOTE: Be sure to fill the tank before firing the burner.
Turn on Main Burner
CAUTION
Dry Tank Hazard.
Can cause the device to malfunction.
The tank must have water in it before turning on
the control.
Follow the instructions provided by the appliance
manufacturer or turn the Control’s ON/OFF switch to the
ON position then adjust the temperature using the
setpoint knob.
WARNING
Scalding Hazard.
Can cause burns, severe injury, or death.
Never move setpoint knob past the B setting
unless extremely hot water is desired. Always
check water temperature at the faucet and
readjust until comfortably warm to the touch.
Consider the ages and health of all who will come
into contact with heated water.
Perform Gas Leak Test
WARNING
Fire or Explosion Hazard
Can cause severe injury, death, or property
damage.
Check for gas leaks with soap and water solution
any time work is done on a gas system.
CAUTION
Water Damage Hazard.
Can damage electrical components in the
WV4262B.
Do not spray soap and water solution on the
housing. Do not use an excessive amount of soap
and water to perform the gas leak test.
M32298
ON/OFF
SWITCH
LED
TEMPERATURE
SETPOINT KNOB
ENVIRACOM
CONNECTOR
APPLY WRENCH
HERE WHEN
CONNECTING
SUPPLY LINE
OUTLET
PRESSURE
TAP
24 VAC
COMMON
EARTH GROUND
321
DAMPER
HIGH LIMIT
SWITCH AND
END SWITCH
FLAMMABLE
VAPOR
SENSOR
ENVIRACOM
CONNECTOR
M32314A
SPARK CONNECTOR
(TO PILOT ASSEMBLY Q3451A)
24 VAC
WV4262B

WV4262B POWERED DAMPER WATER HEATER CONTROLS
769-2496—05
Gas Leak Test
1. Paint pipe connections upstream of the water
heater control with rich soap and water solution.
Bubbles indicate a gas leak.
2. If a leak is detected, tighten the pipe connections.
3. Stand clear of the burner while lighting to prevent
injury caused from hidden leaks that could cause
flashback in the appliance vestibule.
4. With the burner in operation, paint the pipe joints
(including adapters) and the control inlet and outlet
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 a leak cannot be stopped.
Perform Gas Input and Burner
Ignition Check and Adjustment
WARNING
Fire or Explosion Hazard
Can cause severe injury, death, or property damage.
Follow these warnings exactly:
1. Do not exceed input rating stamped on appliance
nameplate, or manufacturers recommended burner
orifice pressure for size orifice(s) used. 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 the
pilots extinguished (or that 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:
Make sure the manual gas shutoff switch is in the
OFF position before removing outlet pressure tap
plug to connect manometer (pressure gauge). Also
move the manual gas shutoff switch to the OFF
position when removing the gauge and replacing the
plug. Repeat Gas Leak Test at plug with main burner
operating.
Refer to the OS label on the Control for the pressure
reading, which should match the manometer
reading.
Gas Input and Burner Ignition Check
and Adjustment
1. Check the full rate manifold pressure listed on the
appliance nameplate. Water heater control full rate
outlet pressure should match this rating.
2. With burner operating, check the water heater
control flow rate using the meter clocking method
or check pressure using a manometer connected
to the outlet pressure tap on the water heater
control.
a. Meter Clocking: Convert flow rate to Btuh as
described in form 70-2602, Gas Controls Hand-
book, and compare to Btuh input rating on
appliance nameplate.
b. Manometer: Refer to the OS label on the Control
for the pressure reading, which should match
the manometer reading.
Perform Flame Current Check
1. Turn the temperature control knob to call for heat.
2. Observe the pilot burner during the ignition
sequence and see if:
a. Ignition spark continues after the pilot is lit.
b. The pilot lights and the spark stops, but main
burner does not light
c. The pilot lights, the spark stops, and main
burner light, but the system locks out.
3. If so, ensure adequate flame current as follows:
a. Turn off water heater at circuit breaker or fuse
box.
b. Clean the flame rod with emery cloth.
c. Make sure electrical connections are clean and
tight.
d. Check for cracked ceramic Insulator, which can
cause short to ground, and replace igniter--
sensor if necessary.
e. Check the pilot flame. Make sure it is blue,
steady, and envelops 3/8 to 1/2 in. (10 to 13
mm) of the flame rod.
4. After completing step 3, if any conditions in step 2
above recur, then replace the Control.

WV4262B POWERED DAMPER WATER HEATER CONTROLS
69-2496—05 8
MAINTENANCE
WARNING
Fire or Explosion Hazard
Can cause severe injury, death, or property
damage.
Do not attempt to take the control apart or clean
it. Improper cleaning or reassembly can cause
gas leakage.
The maintenance program should include regular
checkout of the control as outlined in the Installation
section, and the control system as described in the
appliance manufacturer literature.
Maintenance frequency must be determined individually
for each application. Some considerations are:
1. Cycling frequency. Appliances that may cycle 3,000
times annually should be checked monthly.
2. Intermittent use. Appliances that are used season-
ally should be checked before shutdown and again
before the next use.
3. Consequence of unexpected shutdown. Where the
cost of an unexpected shutdown would be high, the
system should be checked more often.
4. Dusty, wet, or corrosive environment. Since these
environments can cause the control to deteriorate
more rapidly, the system should be checked more
often.
The system should be replaced if:
a. It does not perform properly on checkout or
troubleshooting.
b. The control is likely to have operated for more
than 100,000 cycles.
c. The control has been flooded.
SERVICE
WARNING
Fire or Explosion Hazard
Can cause severe injury, death, or property
damage.
Do not disassemble the water heater control; it
contains no replaceable components. Attempted
disassembly or repair can damage the control.
Sequence of Operations
1. Follow the sequence of operation as shown
in Table .
Table 4. WV4262B Sequence of Operation.
Sequence Mode Description
Power Up
1 Start-up Upon Power up, the control runs a safe-start check of RAM, ROM, and
I/O with a typical start-up delay of 1-2 seconds.
2 Flammable Vapor Check To insure no outputs are energized if flammable vapors are present,
the control pre-loads a condition indicating flammable vapors are
present. If no vapors are really present, then the control resumes
normal operation with no perceptible delays. If vapors are present, the
control will immediately perform the flammable vapor lockout.
Heating Sequence
0 Idle Normal operation
1 Heat demand The control receives a demand for heat (the temperature is less than
set point minus differential).
2 Check damper end switch The control checks the damper end switch to insure the damper is
closed.
3 Energize damper motor The damper motor is energized.
4 Monitor damper end switch The control monitors the damper end switch until the damper is open.
5 Energize pilot and spark igniter The pilot valve and spark igniter are energized (after the Prepurge
time).
6 De-energize spark igniter The igniter is de-energized (when flame is proved above the “Igniter
Off” level).
7 Energize main gas valve The main valve is energized (when flame is proved above the “RUN”
level).
8 Wait 3 seconds to stabilize flame Flame and Pressure Switch signals are ignored for 3 seconds after the
main valve is energized (Flame Stabilization Period).
9 Temperature reaches setpoint The demand for heat is satisfied (temperature reaches set point).
10 De-energize the main and pilot gas valves The gas valves are de-energized.
11 Monitor Flame Flame is monitored until flame signal drops below Flame Lost level.
12 De-energize damper motor The damper motor is de-energized.

WV4262B POWERED DAMPER WATER HEATER CONTROLS
969-2496—05
TROUBLESHOOTING
Troubleshooting with LED Indicator
Assistance
1. Observe LED indicator on control; check and repair
the system as noted in Table 5. Error flash codes
are displayed with a 3 second pause before
repeating.
2. After LED flash code analysis and appliance repair
are complete, turn system switch to ON and per-
form lighting procedure.
3. Observe the ignition sequence, comparing it to the
Sequence of Operations shown in Table . Allow the
new ignition sequence to proceed until appliance
lights or an abnormal or unexpected event is
observed.
4. If an unexpected event is observed, use the
Troubleshooting Guide, Fig. 8.
Table 5. Troubleshooting with the LED.
Green LED
Status Indicates Check/Repair
Short flash
once every four
seconds
Idle (no call for heat and no
faults)
Not Applicable.
“Heartbeat”,
alternates
bright/dim
Call For Heat (no faults) Not Applicable
Short flash
once per
second
(Idle mode)
Low Flame Signal on last call
for heat
•Check spark/flame sense rod for build up of silicone-dioxide.
•Check spark/flame sense wire insulation.
Two Flash,
three second
pause
Damper End Switch Failed
Closed
•Check damper end switch for welded contacts and shorted
wiring.
Three Flash,
three second
pause
TCO or Damper End Switch
Failed Open
•Check damper end switch for contact closure.
•Check wiring to damper end switch.
•Check damper motor is opening damper.
•Check damper for blockage.
Four Flash,
three second
pause
ECO Limit Lockout (water
temperature in excess of TCO)
•The control enters permanent lockout after three ECO events.
•Control can be reset by turning the Setpoint knob to its minimum
setting for at least 30 seconds, then returning the Setpoint knob
to the desired temp.
•ECO Limit should not be reached under normal operating
conditions. Check installation to insure all manufacturer
recommendations were followed.
•Reduce the setpoint temperature to keep max. water
temperature further away from ECO trip point.
Five Flash,
three second
pause
Flame Out Of Sequence •Check for pilot flame.
•Replace control if pilot flame is present when gas valve should
be off.
Six-One Flash,
three second
pause
Soft Lockout - Failed Trial For
Ignition
•Check gas supply.
•Verify air is purged from gas lines if appliance has not run for an
extended period of time.
•If pilot flame lights, but control still enters 6-1 flash lockout,
check flame rod for silicone-dioxide build-up.
•Check flame signal strength (if proper tools are available).
•If pilot lights but flame sense can not be repaired, replace
control.
Six-Two Flash,
three second
pause
Soft Lockout - Recycle Limit -
Flame Lost, End Switch Failure
•Check damper and end switch wiring.
Six-Three
Flash, three
second pause
Soft Lockout - Recycle Limit -
Flame Lost
•Check pilot flame to insure main flame is not lifting pilot flame
away from flame sense rod.
•Check gas supply to insure pressure is maintained when main
burner lights.
Six-Four Flash,
three second
pause
Soft Lockout - Flame out of
Sequence Sensed
•Check that pilot flame does not linger after valves close.

WV4262B POWERED DAMPER WATER HEATER CONTROLS
69-2496—05 10
Fig. 8. Troubleshooting without status LED.
Seven Flash,
three second
pause
Flammable Vapor Sensor
Lockout
WARNING: EXPOSION HAZARD
•Indicates gasoline vapors were detected at potentially explosive
levels.
•Verify no gasoline vapors are still present.
•To reset the control, cycle power to the appliance via the
ON/OFF switch or power cord and, within 30 seconds, cross the
HOT set point twice with the set point knob.
•Replace the Flammable Vapor Sensor element if a gasoline spill
event occurred.
Eight-One
Flash, three
second pause
FVS Fault Detected •Verify Flammable Vapor Sensor (FVS) is connected.
•Verify FVS resistance is not below 1.0 K .
•Check wiring to FVS and insure it is not shorted.
•Replace control if everything above checks out OK.
Eight-Two
Flash, three
second pause
Temperature Sensor Fault
Detected
•Verify wiring to Thermal Well is not damaged or broken.
•Verify both sensors in the Thermal Well measure within 500 's
of each other (center terminal is common) and that their values
are in the range of 3 K to 30 K .
Eight-Three
Flash, three
second pause
Electronics Fault Detected •Verify control is not wet or physically damaged.
•Reset control with ON/OFF switch.
•Replace electronics module If 8-3 error persists.
Eight-Four
Flash, three
second pause
Valve Fault Detected •Verify valve is not wet or physically damaged.
•Reset control with ON/OFF switch.
•Replace gas control if 8-4 error persists.
Table 5. Troubleshooting with the LED. (Continued)
Green LED
Status Indicates Check/Repair
Ω
Ω
Ω
Ω
SLIDE SWITCH TO THE ON POSITION,
TURN THE SET KNOB TO HOT;
DAMPER SHOULD OPEN
CHECK:
TANK TEMPERATURE IS AT OR CLOSE TO HOT SET POINT
WIRING OF LINE VOLTAGE SUPPLY
TEMPERATURE SENSOR AND FLAMMABLE VAPOR
SENSOR AND THEIR CONNECTIONS
WIRING FOR DAMPER AND DAMPER END SWITCH
PILOT VALVE SHOULD OPEN AND
IGNITION SOURCE SHOULD START
SPARKING UNTIL PILOT FLAME IS LIT
YES
NO
YES
NO
YES
NO
YES
NO
CHECK:
INLET PRESSURE
MAKE SURE AIR IS BLED OUT OF SYSTEM
CLOGGED PILOT ORIFICE
GAS LEAK IN PILOT TUBING CONNECTIONS
WIRING TO THE FLAME/SPARK ELECTRODE
FLAME/SPARK ELECTRODE IS IN THE CORRECT
POSITION RELATIVE TO THE PILOT BURNER
CHECK:
DAMPER END SWITCH INCLUDING WIRING
DAMPER END SWITCH SHOULD
CLOSE
CHECK:
INLET PRESSURE
MAIN VALVE SHOULD OPEN AND
MAIN FLAME SHOULD BE LIT BY
PILOT FLAME
SYSTEM OK
M32259

WV4262B POWERED DAMPER WATER HEATER CONTROLS
11 69-2496—05
INSTRUCTIONS TO THE
HOMEOWNER
WARNING
Fire or Explosion Hazard.
Can cause severe injury, death, or property
damage.
Follow these warnings exactly:
1. IF YOU SMELL GAS:
a. Turn off the gas supply at the appliance service
valve. On LP gas systems, turn off the gas sup-
ply at the gas tank.
b. Do not light any appliances in the house.
c. Do not touch electrical switches or use the
phone.
d. Leave the building and use a neighbor’s phone
to call your gas supplier.
e. If you cannot reach your gas supplier, call the
fire department.
2. The water heater control must be replaced in event
of any physical damage, tampering, bent terminals,
missing or broken parts, stripped threads, or evi-
dence of exposure to heat.
WARNING
Scalding Hazard.
Can cause burns, severe injury, or death.
Never move temperature setpoint knob past the B
setting without checking water temperature at
the faucet, and re-adjusting until comfortably
warm to the touch. Consider the ages and health
of all who will come into contact with heated
water.
IMPORTANT
Follow the operating instructions provided by
the manufacturer of your water tank appliance.
The information in this form describes a typical
water heater control application, but the specific
controls used and the procedures outlined by
the manufacturer of your appliance can differ,
requiring special instructions.
WARNING
Electrical Shock Hazard.
Can cause severe injury, death, or property
damage.
Disconnect power supply before making wiring
connections to prevent electrical shock or
equipment damage.
STOP: READ THE WARNINGS.
TURNING ON THE APPLIANCE
If the appliance does not turn on when the setpoint knob
is set several degrees above the previous temperature,
follow these instructions:
1. Set the temperature setpoint knob to its lowest
setting to reset the safety control.
2. Disconnect all electric power to the appliance.
3. Turn off the main gas supply to the appliance.
4. Wait five minutes to clear out any unburned gas. If
you then smell gas, STOP! Follow Step 1 in the
Warning above. If you DO NOT smell gas, continue
with the next step.
5. Turn on the main gas supply to the appliance.
6. Reconnect all electric power to the appliance.
7. Turn the setpoint knob to the desired setting.
8. If the appliance does not turn on, there may be
residual air in the gas supply line.
a. Set the temperature setpoint knob to its lowest
setting to reset the safety control.
b. Turn the setpoint knob to the desired setting.
c. Turn the Control’s power switch to the OFF
position, then turn it back ON to restart the 90
second air-purge cycle for the gas supply.
9. If the previous step does not turn on the appliance,
turn off the main gas supply to the appliance and
contact a qualified service technician for assis-
tance.
TURNING OFF THE APPLIANCE
Shutdown
1. Turn device knob to LOW. Turn off the gas supply to
the appliance. Appliance will completely shut off.
2. Follow the procedure in the Instructions To The
Homeowner section above to resume normal oper-
ation.

WV4262B POWERED DAMPER WATER HEATER CONTROLS
© 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
69-2496—05 M.S. Rev. 06-20 | Printed in United States