WV8840B Water Heater Controls
APPLICATION
The WV8840 Water Heater Control is designed for use in
Standing Pilot applications using an immersion well for
water temperature sensing. All models of WV8840
include an integrated NTC temperature sensor.
The WV8840 is powered from a thermopile heated by the
standing pilot flame. CS8840 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
WV8840 can provide both accurate water temperature
control as well as water temperature limit (Temperature
Cut-Out [TCO]) function.
SPECIFICATIONS
IMPORTANT
WV8840 controls provide direct replacement
only.
Pressure Regulator: The outlet pressure regulator
setting 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.
INSTALLATION INSTRUCTIONS
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: -40°F to 150°F (-40°C to 66°C)
* Valve will operate at 0°F (-18°C) but valve characteris-
tics 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 Associa-
tion (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 CS8840
69-2450-03
Table of Contents
Related Manuals for Honeywell WV8840B
Summary of Contents for Honeywell WV8840B
- Page 1 WV8840B Water Heater Controls INSTALLATION INSTRUCTIONS APPLICATION The WV8840 Water Heater Control is designed for use in Capacity: See Table 1. Standing Pilot applications using an immersion well for Regulation Range: water temperature sensing. All models of WV8840 Natural Gas: include an integrated NTC temperature sensor.
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Page 2: Planning The Installation
WV8840B WATER HEATER CONTROLS PLANNING THE INSTALLATION Flow Capacity & Pressure Drop WARNING Fig. 1 shows the typical flow (kBTU/hr) vs pressure drop Fire or Explosion Hazard. (in. w.c.) curve for natural gas and LP gas. Actual Can cause severe injury, death or property pressure drop depends on the internal configuration of the damage. -
Page 3: Connect Gas Supply
WV8840B WATER HEATER CONTROLS 1. Use a new, properly reamed pipe free from chips. If WARNING tubing is used, make sure the ends are square, deburred and clean. All tubing bends must be Fire or Explosion Hazard. smooth and without deformation. -
Page 4: Turn On Main Burner
WV8840B WATER HEATER CONTROLS Wiring IGNITION Follow the wiring instructions furnished by the appliance IMPERFECT SYSTEM THREADS CONTROL manufacturer, if available, or use the general instructions provided below. When these instructions differ from the appliance manufacturer, follow the appliance PIPE manufacturer instructions. -
Page 5: Maintenance
WV8840B WATER HEATER CONTROLS Perform Gas Leak Test Procedure to check the gas input and burner flow rate WARNING 1. Check the full rate manifold pressure listed on the Fire or Explosion Hazard. appliance nameplate. Water heater control full rate Can cause severe injury, death or property outlet pressure should match this rating. - Page 6 WV8840B WATER HEATER CONTROLS 3. After status indicator analysis and appliance repair tank should turn on the main burner. The Status is complete, turn device knob to OFF, wait until the indicator light should continue to blink once every indicator goes out, then perform lighting procedure.
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Page 7: Instructions To The Homeowner
WV8840B WATER HEATER CONTROLS Troubleshooting Without Status Indicator Assistance Follow diagram in Fig. 6. TROUBLESHOOTING GUIDE WITHOUT STATUS LIGHT TURN DEVICE KNOB FROM OFF TO CHECK: PILOT, PRESS DOWN KNOB AND HOLD, • INLET PRESSURE LIGHT PILOT BY DEPRESSING PIEZO •... -
Page 8: Turning Off The Appliance
WV8840B WATER HEATER CONTROLS TURNING OFF THE IMPORTANT Follow the operating instructions provided by APPLIANCE the manufacturer of your water tank appliance. The information in this form describes a typical water heater control application, but the specific Complete Shutdown controls used and the procedures outlined by the manufacturer of your appliance can differ, 1.