CONTENTS

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FOR YOUR SAFETY

PLEASE, READ CAREFULLY THIS MANUAL AND FOLLOW IT FOR YOUR SAFETY.

WARNING : Do not disconnect the electrical supply if the temperatures will be near freezing. The Freeze Prevention Device only works if the unit has proper electrical power. The Freeze Prevention Device is rated for temperatures down to 5°F (-15°C) in a wind free environment. The wind chill factor will cause the Flash Water Heater to freeze and be damaged at temperatures above 5°F (-15°C). Refer to the section on Winterizing and Freeze Prevention Device for more information.

WARNING : Before bathing or showering always check the water temperature. Do not leave children or the infirm unsupervised in the shower or bath. The water temperature is set at 140°F (60°C) from the factory to maximize the amount of hot water you can use, Water temperature over 125°F can cause severe burns instantly or death from scalds.

WARNING : Do not use this appliance if any part has been underwater. Immediately call a certified and trained technician to inspect and service the unit if necessary.

WARNING : Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance.

WARNING : Do not reverse the water and gas connections, this will damage your heater and can cause severe injury or death from scalds. Following the diagram below when installing your Flash water heater.

The Flash Water Heater is an instantaneous, tankless water heater designed to supply all your household and commercial hot water needs utilizing total efficiency. The principle behind the Flash Water Heater is simple. Once you open a hot water tap, water flows through the Flash Water heater. The water flow sensor automatically commands the computer to electronically ignite the burners and the computer monitors the water temperature, volume of water, and gas flow the insure you get the right amount of hot water in a Flash. After the burners are ignited the "fire on" lamp is lit.

0.75 gallons per minute is required to turn the burners on, After the burners are ignited, the flow rate can be lowered to 0.6 gallons per minute to maintain and still keep the heater on.

Now as long as you have water, gas and electricity, you will get an endless flow of hot water. Open a hot water tap to turn on your water heater. Close the tap to turn off your water heater.

To Turn on Your Flash water heater

1. Open a hot water tap.
2. Burners ignite. "Fire On" lamp is lit.

3. Mix with cold water to get the correct temperature water.

To Turn off your Flash water heater

1. Close the hot water tap
2. "Fire On" lamp extinguished.

Once you have properly installed the unit, check the gas and water connections for leaks. Check for proper ventilation and combustible air to the heater. Purge the gas and water lines to remove debris. Then follow these steps to turn on your unit.

1. Close the manual gas control valve located on the gas line.

2. Fully open the manual water control valve on the water supply line.

3. Open a hot water tap, to verify that water will flow to that tap. Then close the hot water tap.

4. Fully open the manual gas control valve installed.

5. Turn on the 120 volt 60 Hz power supply to the Flash Water Heater.

6. Now you are ready to enjoy hours of endless hot water.

 

The temperature has been set at the factory at Max. 140° F (60° C). This is electronically controlled by the computer and cannot be adjusted. Mix the hot water with cold to get the water temperature you desire.

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 5° F (-15° C) in a wind free environment. The wind chill factor will cause the unit to freeze at temperatures above 5° F (-15° C). Do not install the water heater in an area with extremely cold weather. This will void your warranty and Takagi - USA will not be responsible for any damage that occurs.

If you will not be using your heater for a long period of time or if the temperatures will drop below 5° F (-15° C) with the wind chill factor, turn off your heater and drain the unit of water. This will keep your unit from freezing and being damaged. Follow these instructions carefully:

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

2. Turn off the manual gas control valve located outside your heater.

3. Turn off the manual water shut off valve located on the water supply line.

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 or pan to catch the water from the units drain plugs. Remove the drain plugs to drain all the water out of the unit.

6. Leave for 5 minutes.

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

2. Purge the water line of debris.

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

4. Open all the hot water taps to verify water flows to the taps. Then close hot water taps.

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

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