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AP18733 REV. 3.2.17
50
Pressure relief valves must be installed as close to the water heater as possible. No other valves should be placed between the pressure relief
valve and the appliance. DO NOT install a relief valve with a pressure rating greater than 150 psi (1,034 kPa). This is the maximum allowable relief
valve setting for this water heater.
After installing the relief valve and lling and pressurizing the system, test the operation of the valve by lifting the lever. Make sure the valve dis-
charges freely. If the valve fails to operate correctly, replace it with a new relief valve. Ensure that the maximum BTU/H rating on the pressure
relief valve is equal to or greater than the maximum input BTU/H rating of the water heater.
To avoid water damage or scalding due to relief valve operation:
• Discharge line must be connected to relief valve outlet and run to a safe place of disposal. Terminate the discharge line in a manner that will
prevent possibility of severe burns or property damage should the relief valve discharge.
• Discharge line must be as short as possible and the same size as the valve discharge connection throughout its entire length.
• Discharge line must pitch downward from the valve and terminate at least 6" (30 cm) above the oor drain, making discharge clearly visible.
• Discharge line shall terminate plain, not threaded, with a material serviceable for temperatures of 375°F (191°C) or greater.
• Do not pipe discharge to any location where freezing could occur.
• No shutoff valve may be installed between the relief valve and water heater or in the discharge line. Do not plug or place any obstruction in
the discharge line.
• Test the operation of the relief valve after lling and pressurizing the system by lifting the lever. Make sure the valve discharges freely. If the
valve fails to operate correctly, replace it with a new relief valve.
• Test relief valve at least once annually to ensure the waterway is clear. If valve does not operate, turn the water heater “off” and call a
plumber immediately.
• Take care whenever operating relief valve to avoid scalding injury or property damage.
• For water heaters installed with only a pressure relief valve, the separate storage vessel must have a temperature and pressure relief valve
installed. This relief valve shall comply with Relief Valves for Hot Water Supply Systems, ANSI Z21.22 CSA4.4.
FAILURE TO COMPLY WITH THE ABOVE GUIDELINES COULD RESULT IN FAILURE OF RELIEF VALVE OPERATION, RESULTING IN
POSSIBILITY OF SUBSTANTIAL PROPERTY DAMAGE, SEVERE PERSONAL INJURY, OR DEATH.
WARNING
CONNECT ELECTRICAL POWER / INITIAL STARTUP
Install wiring and electrically ground water heater in accordance with the authority having jurisdiction or, in the absence of such an authority,
follow the National Electrical Code, NFPA 70, and/or CSA C22.1 Electrical Code-Part 1 in Canada. Failure to follow all applicable local, state,
and national regulations, mandates, and building supply codes for guidelines to install the electrical power supply could result in property
damage, serious personal injury, or death.
WARNING
ELECTRICAL SHOCK HAZARD – To ensure safety, turn off electrical power supply at service entrance panel before making any electrical
connections to avoid possible electric shock hazard. Failure to do so could result in property damage, serious personal injury, or death.
WARNING
A. WIRING INFORMATION
1. The electrical supply required by the water heater is 120V at 60Hz. Power consumption may be up to 172W. Use an appropriate, dedicated
circuit.
2. Do not disconnect the power supply when the water heater is not in use. When the power is off, the freeze protection in the water heater will
not activate, resulting in possible freeze damage.
3. Do not let the power cord contact gas piping. Tie redundant power cord outside the water heater. Putting the redundant length of cord inside
the water heater may cause electrical interference and faulty operation.
4. This water heater must be properly grounded. Ensure the electrical receptacle that the water heater will be plugged into is properly grounded.
5. Do not attach the ground wire to either the gas or water piping, or to a telephone line.
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