Whirlpool T-K1S User Manual download pdf (Page 5)

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.

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.

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

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Whirlpool T-K1S User Manual Page 5

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