Whirlpool T-K1S installation manual Freeze Prevention

the flow charts on the last page of this manual to determine the possible outlet temperature and flow rate combinations. Based on the United States Department of Energy method of testing water heater output, the T-K1S is rated for 242 gallons per hour, or 4.0 GPM, at a 77° F rise above the inlet temperature. Refer to the following chart of typical household flow rates to determine what the T-K1S can do in a household application. Remember that for bathing, cold water will be mixed for a comfortable temperature, increasing the flow output rate.

Household Flow Rates

Appliance / Use	Flow Rate
	(GPM)
Lavatory Faucet	1.0
Bath Tub	4.0
Shower	2.0
Kitchen Sink	1.5
Dishwasher	1.5
Washing Machine	2.0

Taken from UPC 1997

Freeze Prevention

This unit comes equipped with heaters that discourage the unit from freezing. For this freeze prevention system to operate there has to be electrical power to the unit.

The freeze prevention devices will not work if the electrical power source is disconnected. The unit has been rated for temperatures down to 5º F (-15º

C)in a wind free environment. The wind chill factor will cause the unit to freeze at temperatures above 5º F (-15º C), even if the unit is installed indoors. For indoor installation in areas where the temperature will be well below freezing for extended periods of time, use the “thermostat extension cable” to relocate the internal thermostat located on the fan motor to the outdoors. This will sense the ambient air temperature and turn the internal heater blocks on to prevent the heat exchanger from freezing.

For further protection install a TK-TV03 backflow prevention kit so that cold air will not backflow into the flue and cause the unit to freeze. Do not install the water heater in an area with extremely cold weather. This will void your warranty and Takagi Industrial Co. USA Inc. will not be responsible for any damage that occurs.

WARNING: The pipe heaters are located on the Flash Water Heater only. Any hot or cold water pipes located outside of the unit will not be

protected. Properly protect and insulate these pipes from freezing.

If the heater will not be in use for a long period of time or if the temperatures will drop below 5º F (- 15º C) with the wind chill factor, turn off heater and drain the unit of water. This applies to indoor and outdoor installations. This will keep the unit from freezing and being damaged.

Follow these instructions carefully:

1.Turn off the power supply to the Flash Water Heater.

2.Close manual gas control valve.

3.Close manual water shut off valve.

4.Open all hot water taps in the house. (Bathroom, kitchen, laundry room, etc.). When the water flow has ceased, close all hot water taps.

5.Have a bucket to catch the water from the unit’s drain plugs. Remove the drain plugs to drain the water out of the unit.

6.Let drain for 5 minutes.

7.Securely screw the drain plugs back into place.

Follow these steps when it is again safe to use the water heater:

1.Make sure all hot water taps are closed and the drain plugs are securely attached.

2.Purge the water line of debris.

3.Open manual water control valve located on the water supply line.

4.Open all the hot water taps to verify water flows to the taps. Close hot water taps.

5.Open manual gas control valve located on the gas supply line.

6.Turn on the power supply to the Flash Water Heater.

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