Honeywell WV8840A User Manual

INSTALLATION INSTRUCTIONS
69-2247-05
WV8840A Water Heater Controls
APPLICATION
The WV8840A Water Heater Control is designed for use
in Standing Pilot applications using an immersion well for
water temperature sensing. All models of WV8840A
include an integrated NTC temperature sensor.
The WV8840A 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
WV8840A can provide both accurate water temperature
control as well as water temperature limit (Temperature
Cut-Out [TCO]) function.
SPECIFICATIONS
IMPORTANT
WV8840A 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.
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

Honeywell WV8840A Specifications

General

Brand	Honeywell
Model	WV8840A
Category	Controller
Language	English

Summary

Application

Installation Instructions

Specifications

Planning the Installation

Frequent Cycling

Describes control wear with frequent appliance cycling and recommends monthly checkout.

Water or Steam Cleaning

Advises protecting the control from water or steam during cleaning procedures.

High Humidity or Dripping Water

Warns against water drip and high humidity causing corrosion and failure.

Corrosive Chemicals

Explains corrosive chemicals can cause failure; protect control from contact.

Dust or Grease Accumulation

Notes dust/grease can cause malfunction; suggests covers for protection.

Heat

Warns against excessive temperature; advises insulation and air circulation.

Flow Capacity & Pressure Drop

Details the flow capacity and pressure drop characteristics of the WV8840A control.

Installation

Install Control to Water Tank

Connect Gas Supply

Details connecting the gas supply, emphasizing safety and proper procedures.

Wiring

Fill Tank

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 for diagnosing issues using the control's status indicator light.

Troubleshooting Without Status Indicator Assistance

Thermopile Output Check

Procedure to test the thermopile's voltage output for proper operation.

Instructions to the Homeowner

Stop: Read the Warnings Above

Turning Off the Appliance

Complete Shutdown

Instructions for completely shutting down the appliance and control.