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2012 

Bradford White gas water heater timer

Gas water heater timer requires 3 things:
1. The "ICON gas valve" that comes standard on many Bradford White gas water heaters.
2. The 24-volt AC "Accessory Module Package" that powers available features.
3. The "Performance Package" containing the Programmable Setback Controller which is a 4-time-per-day, 7-day a week gas water heater timer
ICON WV8840 gas valve: Green LED light shows operational status to diagnose problems.
Gas water heater timer research pdf
See short training clips
See 15 minute product video
Bradford White ICON gas valve
To achieve gas water heater timer, the gas valve must connect to Accessory Module at communication port
1. ICON gas valve
2. 24 Volt AC Accessory Module
3. Programmable Controller (gas water heater timer)
Accessory Module Package Bradford White Accessory Module
Accessory Module Package is necessary to provide power to features Accessory Module wires to 24V transformer and to ICON gas valve
Bradford White performance package Gas water heater timer
Performance Package offers features including:
> 4 time per day, 7-day a week gas water heater timer
> Capacity bar showing amount of hot water
> LCD readout of tank temperature
> Integrated mixing device offers safety & energy savings (see below)
Programmable Setback Controller: This is a gas water heater timer
Gas water heater timer research pdf
Set timer: 4 times per day, 7 days per week
Timer can be remotely placed in house
Works only with ICON gas valve and main Accessory Module
Integrated mixing device
Integrated Mixing Device/ part of Performance Package
Adds energy-savings and safety by controlling temperature: For example, the full-hot water port connects to washing machine while the reduced-temperature port connects to kitchen sink. Two other ports add flexibility for ice-maker line and recirculation line. Made of stainless steel.
Image shows:
     1. Programmable Setback Controller (gas water heater timer)
     2. Integrated Mixing Device installed
     3. Motorized Inlet Shut-off Valve (in event of leak)
Mixing valve Mixing valve

Control hot water temperature to different usage points.
Washing machine receives 135 degree water.
Children's bathroom receives 120 degree water.
Requires separate hot water pipe to each area.

How it works. Mixing valve allows cold water to enter hot pipe.

Advantages: Avoid scalding. Reduce hot water consumption

Potential problem: Cold water enters hot pipe, and hot water never arrives at faucet. Read about Crossover
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Icon gas valve

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WV8840 Gas Valve
See larger
Icon gas valve overview
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Step-by-step how to replace honeywell gas control valve
WV8840 Gas control valve
Larger image
Disassemble Icon gas control

Temperature sensor, igniter and gas control can be replaced without draining tank.
Backplate remains installed.
How to replace honeywell gas control valve

How to replace Honeywell gas control.
1) Unplug wires and disconnect piezo igniter
2) Remove 1 screw. On front bottom below plastic cover is 1 screw located on left side.
3) Remove platic cover. Tip plastic cover out from bottom, and then pull straight back toward you and cover snaps off. Caution: plastic cover is connected to body with 3-strand yellow-orange-white wire.
4) Disconnect yellow-orange-white wire. Wire is plugged into circuit board on plastic cover. Grasp wire and pull upward to unplug wire from circuit board..
5) Remove valve body from backplate. There are 2 plastic clips that hold valve body to backplate. These are located at bottom on right and left side. Use screwdriver to push 1 clip down while while using another screwdriver to pry valve body outward. Then use screwdriver to push down other clip to release valve body.

Service manual (10Mb)
Service manual 2
Honeywell makes 2nd style gas control
Honeywell gas valve error codes
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How to light this type of gas valve:
Slide on-off switch to OFF position.
Go to blower system located on top of water heater and turn blower switch to OFF.
Turn off all electric power to water heater appliance.
Set Red knob, the valve thermostat, to LOW.
Wait 5 minutes to clear out gas.
Check for the smell of gas that would indicate a leak.
Turn on electric power to water heater
Set blower to ON position.
Slide on-off switch to ON position.
Set Red knob thermostat to desired temperature.

Read more
Troubleshoot gas control valves

Additional links

How to install tank-type gas water heater
How to troubleshoot Rheem tankless

How to troubleshoot Bosch tankless

Troubleshoot electric water heater

Troubleshoot gas water heater
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Gas and electric water heaters Support the economy:
Buy water heaters  from my associate links:

50 gallon Gas water heaters at Amazon
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50 gallon Electric water heaters at Amazon
40 gallon electric water heaters at Amazon
Hybrid / heat pump/ water heaters at Amazon

Resources:
How to install gas water heater
Troubleshoot gas water heater
Troubleshoot electric water heater

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