12
WARNING
When the installation is complete, visually inspect the
venting system to make sure that all joints are properly
connected and all instructions have been followed. Failure
to properly install the venting system could result in
property damage, personal injury, or death.
Condensation in the Venting System
In some installations, condensation will form in the horizontal
runs of vent piping. In order to effectively control the con-
densate from adversely affecting the mechanical components
of the water heater (draining back into the blower), a rubber
adaptor with a drain outlet is mounted directly on the blower
vent outlet. A plastic tube can be attached to this outlet to drain
any condensate that has accumulated, away from the water
heater. Make sure that the condensate removal tube flows to a
suitable free-flowing drain.
Water Piping
Refer to
Figure 8
for a typical installation. Use of this lay-
out should provide a trouble-free installation for the life of
the water heater. Before making the plumbing connections,
locate the
COLD
water inlet and the
HOT
water outlet.
These fittings are both
3
/
4
” NPT male thread. Make sure
that the dip-tube is installed in the cold water inlet. Install
a shut-off valve close to the water heater in the cold water
line. It is recommended that unions be installed in the cold
and hot water lines so that the water heater can be easily
disconnected, if servicing is required.
When assembling the hot and cold piping, use a good food
grade of pipe joint compound, and ensure all fittings are tight.
DO NOT APPLY HEAT TO THESE FITTINGS
when
making sweat connections to the water heater. Sweat tubing
to threaded adaptors before connecting to the water heater.
IT IS IMPERATIVE THAT NO HEAT BE APPLIED
to
the cold water inlet, as it contains a non-metallic dip-tube.
This will result in premature failure of the fittings,
which is not covered by the warranty
.
Temperature and Pressure-Relief Valve
WARNING
DO NOT
plug the temperature and pressure-relief valve
or its discharge line.
DO NOT
remove the relief valve.
Make sure the relief valve is properly sized for the water
heater. If the relief valve continuously discharges water, call a
qualified service technician to correct the problem. Failure
to follow these instructions can result in property damage,
personal injury, or death.
To protect from excessive pressure and/or temperature, the
manufacturer has installed a temperature and pressure-relief
valve that meets the requirements of the Standard for Relief
Valves and Automatic Gas Shut-Off Devices for Hot Water
Supply Systems, CSA 4.4, in Canada, and ANSI Z21.22, in the
United States. This relief valve has a maximum set pressure
that does not exceed the hydrostatic working pressure of the
water heater (150 psi = 1,035 kPa) and a BTU/h rating equal
to or greater than the input rating, as shown on the water
heater rating plate. It should never be plugged or removed
from the opening marked for it on the water heater.
If this relief valve should need to be replaced, use only a new
temperature and pressure-relief valve. Never install an old or
existing relief valve, as it may be damaged or inadequate for
the working requirements of the new water heater. This new
relief valve must meet all local codes or, at a minimum, the
requirements listed above. Never install any other type of valve
between the relief valve and the water heater.
A discharge line must be installed into the relief valve. The
discharge line:
• Must not be smaller than the outlet pipe size of the relief
valve.
• Must not terminate less than six (6) inches (15 cm) and
not more than twelve (12) inches (30 cm) above floor.
• Must not be restricted in any way. Do not thread, cap, or
in any way restrict the end of this outlet.
• Must be of a material capable of withstanding 210
o
F
(99
o
C) without distortion.
• Must be installed to allow complete drainage of the relief
valve and discharge line.
• Must terminate at an adequate free-flowing drain.
Pressure Build-up in a Water System
When the water heater operates, the heated water
expands creating a pressure build-up. This is a
natural function and is one of the reasons for installing a
temperature and pressure-relief valve. If the cold water sup-
ply line has a built-in water meter, check valve, or pressure-
reducing valve, a suitable expansion tank must be installed to
prevent pressure build-up or water hammer effect. Otherwise,
the warranty is void (
see Figure 8
). An indication of pressure
build-up is frequent discharges of water from the relief valve.
If the relief valve discharges water on a continuous basis, it
may indicate a malfunction of the relief valve, and a qualified
service technician must be called to have the system checked,
and the problem corrected.
INSTALLATION INSTRUCTIONS
