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Honeywell WV8840B, Installation Instructions Manual, Page: 8 / 8

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Honeywell WV8840B Installation Instructions Manual Download Page 8

WV8840B WATER HEATER CONTROLS

Automation and Control Solutions

Honeywell International Inc.
1985 Douglas Drive North
Golden Valley, MN  55422
customer.honeywell.com

® U.S. Registered Trademark
© 2013 Honeywell International Inc.
69-2450—03    M.S.  Rev. 11-13
Printed in United States

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.

STOP: READ THE 

WARNINGS ABOVE.

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 OFF.

2.

Turn off the main gas valve to the appliance.

3.

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. 

4.

Turn on the gas supply to the appliance.

5.

Restart the appliance by performing lighting 

procedure.

6.

Set the setpoint knob to the desired setting.

7.

If the appliance does not turn on, turn off the gas 

supply to the appliance and contact a qualified 

service technician for assistance.

TURNING OFF THE 

APPLIANCE

Complete Shutdown

1.

Turn device knob to OFF. 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 

operation.

Summary of Contents for WV8840B

Page 1: ... 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 Ca...

Page 2: ...al or agricultural applications protect the control with a cover 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 temperature can damage the control Make sure the maximum ambient temperature at the control does not exceed the rating...

Page 3: ... Use a 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 Ensure that gas supply is turned off 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 wat...

Page 4: ... is required for every 10 feet of 1 2 in pipe with 5 in w c pressure 2 Depress the piezo igniter to light the pilot flame and hold the knob in until the status indicator starts to blink approximately 30 seconds indicating pilot now being held by electronics NOTE LED should blink once every three seconds If not check the error codes in Table 3 3 Release the knob and turn to the desired temperature ...

Page 5: ...input and burner flow rate 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 See Fig 5 MAINTENANCE WARNING...

Page 6: ... holding the Pilot Valve open and the Main Valve closed You can now turn the knob to a desired setpoint temperature LED will continue to flash 1 time every 3 seconds while in Idle mode no call for heat Normal operation knob in HEAT position 1 flash every 3 seconds Not an error indicates call for heat during normal operation Main valve open None Action required 2 flashes Low thermopile voltage main...

Page 7: ...trol must be replaced in event of any physical damage tampering bent terminals missing or broken parts stripped threads or evidence of exposure to heat WARNING Scalding Hazard Can cause burns severe injury or death Never move temperature setpoint knob past the HOT setting without checking water temperature at the faucet and readjusting until comfortably warm to the touch Consider the ages and heal...

Page 8: ...oint knob is set several degrees above the previous temperature follow these instructions 1 Set the temperature setpoint knob to OFF 2 Turn off the main gas valve to the appliance 3 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 4 Turn on the gas supply to the appliance 5 Restart the ...

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