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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Whirlpool T-K1S installation manual Freeze Prevention
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T-K1S specifications

The Whirlpool T-K1S is a cutting-edge tankless water heater designed to provide endless hot water while maximizing energy efficiency. This model is part of Whirlpool's commitment to innovative technology and superior performance, making it a popular choice for both residential and commercial applications.

One of the standout features of the T-K1S is its on-demand heating capability. Unlike traditional water heaters that store hot water in a tank, the T-K1S heats water only when needed. This eliminates the need for a storage tank and reduces the risk of running out of hot water during peak usage times. Homeowners can enjoy continuous hot water, making it ideal for multiple simultaneous uses such as showers, dishwashing, and laundry.

The T-K1S is equipped with advanced technology that optimizes energy use. With its high-efficiency rating, it significantly reduces energy consumption compared to conventional water heaters. The built-in digital scale allows users to set precise temperatures, ensuring comfort while also promoting energy conservation. This feature also helps to minimize the carbon footprint, making the appliance an eco-friendly option.

Safety is a paramount consideration in the design of the T-K1S. It features multiple safety mechanisms, including a robust thermal control system that prevents overheating. The unit also has a built-in safety shut-off mechanism which activates in the event of water flow disruptions, ensuring peace of mind for users.

Another noteworthy characteristic of the T-K1S is its compact design. The space-saving design offers flexibility in installation, allowing it to fit in small or tight spaces, such as utility rooms, basements, or even closets. This feature is especially beneficial for those with limited room for traditional, bulky water heating systems.

Durability is another key aspect of the Whirlpool T-K1S. Constructed with high-quality materials, it is designed to withstand the test of time, minimizing the need for repairs or replacements. Whirlpool also offers excellent warranty options for added security on your investment.

In summary, the Whirlpool T-K1S is an exceptional tankless water heater that combines efficiency, safety, and durability. With its on-demand heating technology, energy-saving features, and compact design, it represents a smart choice for anyone looking to enhance their hot water supply while being environmentally conscious. It embodies Whirlpool's commitment to quality and performance, making it a leading option in the market.
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