Installation; General - Takagi 110U Indoor (T-KJr2U-IN) Installation Manual And Owner's Manual

INSTALLATION

1. Follow all local codes, or in the absence of local codes, follow the most recent edition of the National
Fuel Gas Code: ANSI Z223.1/NFPA 54 in the USA or CAN/CSA B149.1 Natural Gas Installation Code in
Canada.
2. All gas water heaters require careful and correct installation to ensure safe and efficient operation.
This manual must be followed exactly. Read the "Safety Guidelines" section.
3. The manifold gas pressure is preset at the factory. It is computer controlled and should not need
adjustment.
4. Maintain proper space for servicing. Install the unit so that it can be connected or removed easily.
Refer to the "Clearances" section on p. 9 for proper clearances.
5. The water heater must be installed in a location where the proper amount of combustible air will be
available to it at all times without obstructions.
6. The electrical connection requires a means of disconnection, to terminate power to the water heater
for servicing and safety purposes.
7. 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. Make sure the vent termination meets the required distance by
local code from any doorway or opening to prevent exhaust from entering a building. (Refer to p. 14.)
8. Particles from flour, aerosols, and other contaminants may clog the air vent, build up and reduce
the functions of the rotating fan, cause improper burning of the gas, or cause damage to the water
heater. Regularly ensure that the area around the unit is dust- or debris-free. Regular maintenance is
recommended for these types of environment.
9. For the 110U Indoor (T-KJr2U-IN), 310U Indoor (T-K4U-IN) and 510U Indoor (T-D2U-IN) models:
• These units may be converted to a direct-vent (sealed combustion) appliance by installing
a direct-vent conversion kit Part No. 9007667005 (TK-TV10) which will bring in all required
combustible air from outside the building. When installing the direct-vent conversion kit, please
follow all instructions included with the kit.
• If the water heater is used as a direct-vent appliance, the unit requires a 3 in. (76 mm)
combustible air supply pipe. The intake pipe must be sealed airtight. Air supply pipe can be
made of ABS, PVC, CPVC, Polypropylene, corrugated stainless steel, or Category lll / IV stainless
steel.
• Terminating the venting through a sidewall is recommended for the direct-vent system.
• Running the exhaust vent and the intake pipe parallel is recommended.
• Terminating the exhaust and intake on the same wall/surface is recommended. Terminating in
the same pressure zone allows for pressure balancing, which prevents nuisance shutdowns.
10. The 110U Outdoor (T-KJr2U-OS), 310U Outdoor (T-K4U-OS) and 510U Outdoor (T-D2U-OS) models
only to be installed outdoors and only in the area with mild, temperate climates.

GENERAL

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Installation Manual
Installation