GSW 319594-000 manual Gas Control/Thermostat, Heater Shutdown, System Error Codes

CAUTION:

Read before proceeding. If you do not follow these instructions exactly, a fire or explosion may result, causing property damage, per- sonal injury or loss of life.

Gas Control/Thermostat

This heater may be equipped with the Robertshaw 2000WDER gas control/thermostat and a hot-surface ignit- er. This control is a combination gas valve, thermostat and ignition controller for use on this power vented water heater. The valve contains a micro-controller that supervises the ignition sequence and monitors the temperature settings and operation of the heater. The controller also monitors the flammable vapour safety features of this heater.

This heater is equipped with a hot-surface ignition sys- tem that automatically ignites the burner. Do not attempt to light this heater manually with a match or flame-producing device.

Putting the Heater into Service

1.Turn the manual gas shut-off valve for the heater to the “ON” position.

2.Turn the gas control switch to “ON”.

3.Follow the Lighting Instructions (Robertshaw) given on the side of the water heater and also depicted in this manual. See also “Gas Supply”, “Water Heater Operation” and “Sequence of Operation”.

Temperature Adjustment

The temperature dial is adjusted to its lowest tempera- ture position when shipped from factory.

•The temperature of the water can be selected by adjust- ing the temperature dial located on the front of the con- trol (see Figure 22).

•The large arrow position of the thermostat is the pre- ferred starting point.

•Each division on the thermostat dial represents a 3°C (5°F) water temperature change.

Note: To avoid scald injury, set the control to the lowest set- ting that will supply your hot-water needs.

There is a hot-water scald potential if the thermostat is set too high. In households with children, disabled or the elder- ly, select a lower temperature setting. Tempering valves (mixing valves) for reducing point-of-use water tempera- tures are available and may be required by your local authority. Consult a licensed plumber or your local plumbing authority.

Heater Shutdown

1.Turn the thermostat dial to the lowest setting.

2.If the heater is running let it shut down first.

3.Turn off all electrical power to the heater or unplug the power cord from the receptacle.

4.Press the gas control switch located on the top of the control. It will automatically turn to the “OFF” position.

5.Turn the manual gas supply valve to the water heater to the “OFF” position.

System Error Codes

The micro-controller inside the gas control monitors the flammable vapour safety features, the ignition sequence, temperature settings and overall operation of the heater. If any of these parameters does not operate properly the con- troller will shut down the water heater, diagnose the failure and flash an error code. Table 3 lists the System Status Codes for the Robertshaw control. Refer to Table 3 and to the “Trouble Shooting Guide” to diagnose the problem before attempting corrective action. See also “Flammable Vapour Sensor” and “Resettable Lockout”.

Steady ON				Control Failure or Miswiring.*
Slow Flash				Water Heater is in Stand-by
				Mode.
Fast Flash				Water Heater is in Heat Mode.
1 flash		1 flash		Ignition Failure.
2 flashes		1 flash	Pause for 3	Flammable Vapour Detected.*
2 flashes	Pause	3 flashes		Flammable Vapour Sensor
				Interface Failure or Miswiring.*
3 flashes		1 flash		Pressure Switch Fails to Open.
	for 1 second		seconds &repeat
3 flashes		3 flashes		Pressure Switch Fails to Close
				or Hi-Limit Switch is Open.**
4 flashes		1 flash		Line/Neutral Polarity Failure.**
4 flashes		2 flashes		ECO Failure.**
4 flashes		3 flashes		Flame is Present at the End of
				Heat Cycle.**
5 flashes		-		Vacation Mode.

* System lockout. Call your service provider for assistance.

** System interruption/safety shutdown. Resettable lock out condition.

Table 3 System Status Codes

WARNING

Risk of scalding

Hot water can produce third degree burns in 6 seconds at . . . . . . . .60°C (140°F) in 30 seconds at . . . . . . .54°C (130°F) in 5 minutes at . . . . . . . . .49°C (120°F)

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