John Wood Takagi - 110-310-510 - Manual (Page 5)

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WARNING
Water temperatures over 52°C (125°F)
can cause severe burns instantly or
death from scalding. The water tem-
perature is set at 50°C (122°F) from the
factory to minimize any scalding risk.
Before bathing or showering always
check the water-temperature.
Do not store or use gasoline or other
flammables, vapors, or liquids in the
vicinity of this appliance.
Do not reverse the water and/or gas
connections as this will damage the gas
valves and can cause severe injury or
death. Follow the diagram on pg. 17
when installing your water heater.
Do not use this appliance if any part has
been in contact with or been immersed
in water. Immediately call a licensed
plumber, a licensed gas fitter, or a pro-
fessional service technician to inspect
and/or service the unit if necessary.
Do not disconnect the electrical supply if
the ambient temperature will drop below
freezing. The Freeze Prevention System
only works if the unit has electrical
power. The warranty will not be covered
if the heat exchanger is damaged due
to freezing. Refer to the section on the
Freeze Prevention System on pg. 28 for
more information. •
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INSTALLATION
General
1. Follow all local codes, or in the absence of local codes,
follow the most recent edition of CSA B149.1 Natural
Gas and Propane Installation Code.
2. All gas water heaters require careful and correct installa-
tion 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 pg. 7 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 discon-
nection, to terminate power to the water heater for ser-
vicing 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 pg. 13).
8. Particles from flour, aerosols, and other contaminants
may clog the air vent or reduce the functions of the rotat-
ing fan and cause improper burning of the gas. Regularly
ensure that the area around the unit is dust- or debris-
free; regular maintenance is recommended for these
types of environment.
9. If you will be installing the water heater in a contaminated
area with a high level of dust, sand, flour, aerosols or
other contaminants/chemicals, they can become air-
borne and enter and build up within the fan and burner
causing damage to the water heater.
10. For the 110, 310, & 510 models:
These units may be converted to a direct-vent
(sealed combustion) appliance by installing a direct-
vent conversion kit (Part No. 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 76mm (3 in.) combustible air sup-
ply pipe. The intake pipe must be sealed airtight. Air
supply pipe can be made of ABS, PVC, galvanized
steel, corrugated aluminum, corrugated stainless
steel or Category III stainless steel.
Terminating the venting through a sidewall is recom-
mended for the direct-vent system.
Running the exhaust vent and the intake pipe paral-
lel 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. •
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