A.O. Smith GPS-75 owner manual Maintenance, Temperature Regulation

TEMPERATURE REGULATION

CAUTION

THIS WATER HEATER IS EQUIPPED WITH AN ADJUSTABLE THERMOSTAT TO CONTROL WATER TEMPERATURE. HOT WATER TEMPERATURES REQUIRED FOR AUTOMATIC DISHWASHER AND LAUNDRY USE CAN CAUSE PAINFUL SCALDING WITH POSSIBLE SERIOUS AND PERMANENT INJURY. THE TEMPERATURE AT WHICH INJURY OCCURS VARIES WITH THE PERSON'S AGE AND THE TIME OF EXPOSURE. THE SLOWER RESPONSE TIME OF CHILDREN, AGED OR DISABLED PERSONS INCREASES THE HAZARDS TO THEM. NEVER ALLOW SMALL CHILDREN TO USE A HOT WATER TAP OR TO DRAW THEIR OWN BATH WATER. NEVER LEAVE A CHILD OR DISABLED PERSON UNATTENDED IN A BATHTUB OR SHOWER.

THE WATER HEATER SHOULD BE LOCATED IN AN AREA WHERE THE GENERAL PUBLIC DOES NOT HAVE ACCESS.

It is recommended that lower water temperatures be used to avoid the risk of scalding. It is further recommended, in all cases, that the water temperature be set for the lowest temperature which satisfies your hot water needs. This will also provide the most energy efficient operation of the water heater. The water temperature adjustment was factory set at the lowest temperature. Pressing the "COOLER" button decreases temperature and pressing the "HOTTER" button increases the temperature.

SETTING THE WATER HEATER TEMPERATURE AT 120°F (APPROX. "" MARK ON TEMPERATURE SETTING OF CONTROL) WILL REDUCE THE RISK OF SCALDS. Some states require settings at specific lower temperatures.

Figure 10 shows the approximate water temperatures produced at various thermostat settings. Short repeated heating cycles caused by small hot water uses can cause temperatures at the point of use to exceed the thermostat setting by up to 30°F. If you experience this type of use you should consider using lower temperature settings to reduce scald hazards.

Valves for reducing the point-of-use temperature by mixing cold and hot water are available. See figure 2. Also available are inexpensive devices that attach to faucets to limit hot water temperatures. Contact a licensed plumber or the local plumbing authority.

To avoid any unintentional changes in water temperature settings, the control has a tamper resistant feature for changing the temperature setting. To change the temperature setting follow these instructions:

1."Wake Up" the temperature indicators by holding down both the "COOLER" and "HOTTER" temperature adjustment buttons at the same time for one second (see Figure 10). One or two of the temperature indicators will light up. These indicators will only remain on for 30 seconds if no further buttons are pressed. After 30 seconds the control will go back to "Sleep" mode.

2.Release both of the temperature adjustment buttons.

A.To decrease the temperature press and release the "COOLER" button until desired setting is reached.

B.To increase the temperature press and release the "HOTTER" button until the desired setting is reached.

NOTE: Holding down the button will not continue to lower or raise the temperature setting. The button must be pressed and released for each temperature change desired.

SHOULD OVERHEATING OCCUR OR THE GAS SUPPLY FAIL TO SHUT OFF, TURN OFF THE MAIN MANUAL GAS SHUTOFF VALVE TO THE APPLIANCE. SEE FIGURE 1 (G).

TEMPERATURE INDICATORS
TEMPERATURE ADJUSTMENT BUTTONS
				Time to Produce
			Display	2nd & 3rd Degree
Temperature Setting			A B C Burns on Adult Skin
C - Flashing = approx. 160°F				About 1/2 seconds
C =		approx. 150°F		About 1-1/2 seconds
B	=	approx. 140°F		Less than 5 seconds
A	=	approx. 130°F		About 30 seconds
	=	approx. 120°F		More than 5 minutes
WARM	=	approx. 80°F		- - - - - - - - - - - - - - -

FIGURE 10

MAINTENANCE

CAUTION

DISCONNECT FROM ELECTRICALSUPPLY BEFORE SERVICING UNIT. FOR YOUR SAFETY, WATER HEATER SERVICE SHOULD BE

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