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Honeywell WV8860C - User Manual

Honeywell WV8860C
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INSTALLATION INSTRUCTIONS
34-00019-03
WV8860C Water Heater Controls
APPLICATION
The WV8860 Water Heater Control is designed for use in
Standing Pilot applications using an immersion well for
water temperature sensing. All models of WV8860
include an integrated NTC temperature sensor.
The WV8860 design includes an input for reading an
NTC temperature sensor. The control uses this sensor to
read and capture the temperature profile of surfaces
with maximum temperatures up to 300°F (150°C).
Applications of this feature include characterizing the
water heater combustion chamber temperature during
burner operation to indicate if the burner is operating
properly.
The WV8860 is powered from a thermopile heated by the
standing pilot flame. CS88 pilot assemblies are
designed for use with this control.
The immersion well for sensing water temperature has
matched NTC thermistor sensors. These sensors
provide the fail-safe mechanism through which the
WV8860 can provide both accurate water temperature
control as well as water temperature limit (Temperature
Cut-Out [TCO]) function.
SPECIFICATIONS
IMPORTANT
WV8860 controls provide direct replacement
only.
Pressure Regulator: The outlet pressure regulator set-
ting is shown on the product label.
Inlet Pressure Range:
See appliance rating plate for inlet pressure range
recommendation.
1/2 PSI (14.0 in. w.c.) maximum inlet pressure
allowed for proper operation.
Body Pattern: 90 degrees with 1/2 in. inlet and 1/2 in.
inverted flare outlet.
Mounting: Mounting in upright position only.
Control Input:
Voltage Minimum: 350 mV dc, open circuit.
Voltage Maximum: 850 mV dc, open circuit.
Capacity: See Table 1.
Regulation Range:
Natural Gas:
Minimum: 30,000 Btuh.
Maximum: 85,000 Btuh.
Ambient Temperature Range: 32°F to 150°F
(0°C to 66°C)
Operating Range: 0°F to 150°F (-18°C to 66°C)*
Storage Range: -20°F to 120°F (-29°C to 49°C)
*Valve will operate at 0°F (-18°C) but valve
characteristics can not be guaranteed until ambient
temperature reaches 32°F (0°C).
Humidity: 95% non-condensing at 104°F (40°C)
Approvals:
This device is certified by Canadian Standards
Association (CSA) to the following standards:
ANSI Z21.20
ANSI Z21.23
ANSI Z21.78
ANSI Z21.87
CAN/CSA-C22.2 No. 199-M89
CAN1-6.6-M78
CSA 4.6
CSA 6.20
Accessory Parts:
Pilot Assembly CS88
Chamber Sensor 50056062-201

Questions and Answers

  • L
    Leslie Lindsey MDAug 15, 2025
    What to do if Honeywell WV8860C Controller shows 5 flashes?
    • R
      Robert TurnerAug 15, 2025
      If your Honeywell Controller is showing 5 flashes, it indicates a water temperature sensor failure. Inspect the water temperature sensor and its connection for open circuits, shorts, or differences in resistance between the two sensor elements.
  • D
    Dr. Roger WheelerAug 18, 2025
    Why is my Honeywell WV8860C flashing 3 times?
    • P
      Pamela ColemanAug 18, 2025
      If your Honeywell Controller is flashing 3 times, this indicates insufficient water heating, meaning the water temperature isn't rising as expected. You should: * Check the valves. * Check the connectors between valves and electronics. * Check the water temperature and chamber temperature sensors. * Check the inlet gas pressure. If the main burner isn't lit and no issues are found with wiring or gas pressure, consider replacing the control.
  • S
    Sherry BoydAug 22, 2025
    How to fix Honeywell WV8860C Controller showing 4 flashes?
    • A
      Alexander BishopAug 22, 2025
      If your Honeywell Controller displays 4 flashes, it means the temperature cut-out limit has been reached. You should check the valves and the water temperature sensor. Also, reduce the water temperature setpoint. Before finishing, thoroughly check the main valve operation and water temperature control.
  • J
    Jessica GonzalesAug 25, 2025
    What does 10 flashes mean on a Honeywell WV8860C?
    • L
      Linda MolinaAug 26, 2025
      Ten flashes on your Honeywell Controller indicates an abnormal combustion chamber temperature profile during the heating cycle. To resolve this, clean all combustion air intakes to the appliance, clean the burner, and remove any obstacles restricting airflow to the burner. Then, restart the control.
  • Z
    Zachary ClarkAug 28, 2025
    What to do if Honeywell Controller is flashing 7 times?
    • S
      Stephen GutierrezAug 28, 2025
      If your Honeywell Controller is flashing 7 times, this indicates an electronics failure. The suggested solution is to replace the control module.
  • J
    Jennifer GonzalezSep 1, 2025
    How to troubleshoot a Honeywell WV8860C flashing 9 times?
    • K
      Kenneth HughesSep 1, 2025
      If your Honeywell Controller is flashing 9 times, it indicates a door temperature sensor failure. Check the door temperature sensor and its connection for open circuits or shorts, and then restart the control.
  • R
    Roberto GreenSep 4, 2025
    What does it mean when my Honeywell Controller flashes twice?
    • R
      richard65Sep 4, 2025
      If your Honeywell Controller flashes twice, this indicates low thermopile voltage, meaning the main valve is not turned on. Check the thermopile and its connections, and also check the pilot flame.
  • R
    Ronald SmithSep 7, 2025
    Why is my Honeywell Controller flashing 8 times?
    • B
      Brianna WileySep 7, 2025
      If your Honeywell Controller flashes 8 times, this is a warning indicating that the control does not see power decaying with the knob in the OFF position. Check the valves.
  • E
    ewhiteSep 12, 2025
    What does 6 flashes on a Honeywell WV8860C mean?
    • E
      escottSep 12, 2025
      If your Honeywell Controller flashes 6 times, it means the tank leakage was detected by an optional accessory. The control recovers after the optional accessory has been reset.

Summary

INSTALLATION INSTRUCTIONS

SPECIFICATIONS

Inlet Pressure Range

Specifies the maximum inlet pressure allowed for proper operation of the control.

PLANNING THE INSTALLATION

INSTALLATION

Install Control to Water Tank

Connect Gas Supply

Wiring

Pilot Gas and Lighting Procedure

Turn on Main Burner

Perform Gas Leak Test

Check the Gas Input and Burner Flow Rate

MAINTENANCE

TROUBLESHOOTING

Troubleshooting With Status Indicator Assistance

Guide to diagnose issues using the control's status indicator light flashes.

Troubleshooting Without Status Indicator Assistance

Thermopile Output Check

TURNING OFF THE APPLIANCE

Complete Shutdown

Procedure to completely shut off the appliance and its gas supply.

Honeywell WV8860C Specifications

General IconGeneral
BrandHoneywell
ModelWV8860C
CategoryController
LanguageEnglish

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