12
Figure 10 shows the typical attachment of the water piping to the
water heater. The water heater is equipped with 3/4 inch NPT water
connections.
NOTE:
If using copper tubing, solder tubing to an adapter before
attaching the adapter to the cold water inlet connection. Do not
solder the cold water supply line directly to the cold water inlet.
It will harm the dip tube and damage the tank.
T & P Valve and Pipe Insulation (if supplied)
1.
Locate the temperature and relief valve on the water heater (also
known as a T&P Relief Valve, Figure 11).
2.
Locate the slit running the length of the insulation.
3
Spread this slit open and slip it up under the T&P Relief Valve.
See Figure 11. Apply gentle pressure to the insulation to ensure it
is fully seated on the T&P Relief Valve. Once sealed secure the
insulation with a section of duct tape, elecrical tape, or equivalent.
IMPORTANT: The insulation or tape must not block the discharge
opening or hinder access to the manual relief lever. Ensure a
discharge pipe is installed into the T&P valve discharge opening
per the instructions manual.
4.
Locate the hot water (outlet) & cold water (inlet) pipes to the water
heater.
5.
Locate the slit running the length of a section of pipe insulation.
6.
Spread the slit open and slip the insulation over the cold water
(inlet) pipe. Apply gentle pressure along the length of the
insulation to ensure it is fully seated around the pipe. Also ensure
that the base of insulation is flush with the water heater. Once
seated, secure the insulation with duct tape, electrical tape, or
equivalent.
7.
Repeat steps 5 through 6 for the hot water (outlet) pipe.
8.
Add additional sections of pipe insulation as needed.
T&P Relief Valve Insulation
Manual Relief Lever
T&P Relief Valve
T&P Relief Valve
Drain Line
FIGURE 11.
TEMPERATURE-PRESSURE RELIEF VALVE
This heater is provided with a properly certified combination
temperature - pressure relief valve by the manufacturer.
The valve is certifi ed by a nationally recognized testing laboratory
that maintains periodic inspection of production of listed equipment of
materials as meeting the requirements for Relief Valves for Hot Water
Supply Systems, ANSI Z21.22 • CSA 4.4, and the code requirements
of ASME.
If replaced, the valve must meet the requirements of local codes, but not
less than a combination temperature and pressure relief valve certifi ed
as indicated in the above paragraph.
The valve must be marked with a maximum set pressure not to
exceed the marked hydrostatic working pressure of the water heater
(150 psi = 1,035 kPa) and a discharge capacity not less than the water
heater input rate as shown on the model rating plate.
For safe operation of the water heater, the relief valve must not be
removed from its designated opening nor plugged.
The temperature-pressure relief valve must be installed directly into
the fi tting of the water heater designed for the relief valve. Position the
valve downward and provide tubing so that any discharge will exit only
within 6 inches (15.2 cm) above, or at any distance below the structural
fl oor. Be certain that no contact is made with any live electrical part.
The discharge opening must not be blocked or reduced in size under
any circumstances. Excessive length, over 30 feet (9.14 m), or use of
more than four elbows can cause restriction and reduce the discharge
capacity of the valve, see Figures 10 or 14.
No valve or other obstruction is to be placed between the relief valve
and the tank. Do not connect tubing directly to discharge drain unless
a 6" (15.2 cm) air gap is provided. To prevent bodily injury, hazard to
life, or property damage, the relief valve must be allowed to discharge
water in quantities should circumstances demand. If the discharge pipe
is not connected to a drain or other suitable means, the water fl ow may
cause property damage.
The Discharge Pipe:
• Shall not be smaller in size than the outlet pipe size of the valve, or
have any reducing couplings or other restrictions.
• Shall not be plugged or blocked.
• Shall be of material listed for hot water distribution.
• Shall be installed so as to allow complete drainage of both the
temperature-pressure relief valve, and the discharge pipe.
• Must terminate a maximum of six inches above a fl oor drain or
external to the building. In cold climates, it is recommended that
the discharge pipe be terminated at an adequate drain inside the
building.
• Shall not have any valve between the relief valve and tank.
