Freeze Protection; Installation; General; Accessories - Takagi T-KD20 Installation Manual And Owner's Manual

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 even
5º F (-15º C) in ambient temperature, 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
extend the internal thermostat to the outdoors, and
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 or pan ready 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.

Installation

This section is for the installer. The installer
is responsible for the correct installation of
your Flash Water Heater.
For Your Safety: Only a certified and
trained service technician or qualified
plumber may service or install your product.
Please keep this owner's manual in a safe
place for future reference. Copies of this
manual are available from TAKAGI-USA

General

All gas water heaters require careful and correct
installation to ensure safe and efficient operation. This
manual must be followed exactly.
1. Read the For Your Safety section in the beginning
of this manual.
2. This unit is not capable of being used as a pool or
spa heater.
3. The regulator is preset at the factory. It is computer
controlled and should not need adjustment.
4. Suitable for potable water heating and space
heating. Well water or hard water may cause scale
problems that will
manufacturer's warranty.
5. Maintain proper space for servicing. Install the unit
so that it can be connected or removed easily.
6. Install so that the electrical power can be switched
off if necessary.
7. Avoid installing in an area with high levels of dust,
sand or debris. Particles may clog the air vent,
reduce fan function, or cause improper combustion.
8. Do not install the unit where the exhaust vent is
pointing into any opening in a building or where the
noise may disturb your neighbors.

Accessories

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