GSW 5065 Flammable Vapour Sensor, Temperature Regulation, Risk of scalding, System Status Codes

Important: When using a leak test solution around the control, do not splash any liquid on the flammable vapour sensor, electric connections or electronic components of the gas control/thermostat. The gas control/thermostat can be damaged. DO NOT use a flame to detect gas leaks.

7.Turn the temperature dial to the lowest setting. The burner will stop in approximately 20 seconds.

NOTE: If the burner does not stop as described above, the water temperature may be below the lowest temperature that the thermostat is able to sense ((32°C) 90°F). Wait until the water temperature has risen.

8.Re-cycle the system by turning the temperature dial up toward the “HIGH” position to call for heat a second time.

9.To check the lockout on the ignition control, turn the temperature dial to the lowest setting possible. Wait for the system to shut down completely. Then, set the gas control switch to the “OFF” position.

10.Now turn the temperature dial to the highest setting.

11.The igniter will be energized. However, since there is no main gas flow, the burner cannot be lit. After three trials, a lockout will occur, deactivating the system.

12.To reactivate the system, remove the power by unplug- ging the power cord. Turn the gas control switch to “ON”. Then restore power by reinserting the power cord into the electrical receptacle. The LED on the control will flash a system status code to indicate that the lockout has been reset (see Table 3).

13.Follow instructions given in the “Lighting & Operating Instructions” section when heater is ready to be put back into service.

14.Turn the temperature dial to desired temperature set- ting. Instruct the owner/operator in the correct use and setting of the control.

15.If the LED is on continuously, it indicates a control failure. Call for assistance.

Flammable Vapour Sensor

When using a gas fired water heater there is a risk of flam- mable vapours entering the combustion chamber, being ignited by the burner flame and causing a flashback. In order to detect such flammable vapours before they enter the combustion chamber, this water heater is equipped with a flammable vapour sensor (FVS). It is a chemical-absorp- tion based sensor that is connected to the gas control/ther- mostat (see Figures 21 & 22). When exposed to flammable vapours it will trigger the control to stop the flow of gas and enter the FVS lockout state. While in the FVS lock-out state the LED on the control will flash the 2-and-1 Gas lock-out code. If this occurs, check around the water heater for sources of chemical contamination such as: flammable vapours including gas vapours, solvents, paint and thinners as well as sources of water and detergents. Remove any such sources, check the surrounding area for damage and call a qualified service technician to service the water heater and replace the flammable vapour sensor. If there is a prob- lem with the wiring of the flammable vapour sensor or the flammable vapour interface the LED will flash the 2-and-3 status code.

Table 3		SYSTEM STATUS CODES
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
	for 1second		seconds&repeat	Open.***
4 flashes		3 flashes		Pressure Switch Fails to Close
3 flashes		3 flashes		or Hi-Limit Switch is Open.***
4 flashes		1 flash		Line/Neutral Polarity Failure.***
4 flashes		2 flashes		ECO Failure.***
				Flame is Present at the End of
				Heat Cycle.***
5 flashes		-		Vacation Mode.

*System lock out. Call your service provider for assistance.

**Excessive moisture on the gas control/thermostat.

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

Resettable Lock Out: The gas control/thermostat can be reset by unplugging the power cord to remove power and then reinserting the plug to restore the power. Alternatively, the control will automatically attempt to reset after a 20 minute wait period. Also see “Troubleshooting Guide”.

Temperature Regulation

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

The temperature of the water can be selected by setting of the temperature dial on the front of the gas control (see Figure 23). The large arrow position on the thermostat is the preferred starting point for setting the temperature control. Each division on the thermostat dial represents a 3°C (5°F) water temperature change. Energy conservation is a con- sideration when selecting the water temperature setting.

For most economical operation, select a water temperature that is adequate for your needs. There is a hot water scald potential if the thermostat is set too high.

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)

In households with children, disabled or the elderly, select a lower temperature setting. Valves for reducing point–of–use temperature by mixing hot and cold water are available. Consult a licensed plumber or the local plumbing authority.

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