Installation Checklist, Water System Piping

Devices for Hot Water Supply Systems, ANSI Z21.22 - latest edition. This valve must be marked with the maximum set pressure not to exceed the marked maximum working pressure of the water heater. Install the valve into an opening provided and marked for this purpose in the water heater, and orient it or provide tubing so that any discharge from the valve exits only within 6 inches above, or at any distance below, the structural ﬂ oor, and does not contact any live electrical part. The discharge opening must not be blocked or reduced in size under any circumstance.

IMPORTANT: Only a new temperature and pressure relief valve should be used with your water heater. Do not use an old or existing valve as it may be damaged or not adequate for the working pressure of the new water heater. Do not place any valve between the relief valve and the tank.

The Temperature & Pressure Relief Valve:

•Shall not be in contact with any electrical part.

•Shall be connected to an adequate discharge line.

•Shall not be rated higher than the working pressure shown on the data plate of the water heater.

The Discharge Line:

•Shall not be smaller than the pipe size of the relief valve or have any reducing coupling installed in the discharge line.

•Shall not be capped, blocked, plugged or contain any valve between the relief valve and the end of the discharge line.

•Shall terminate a maximum of 6 inches above a floor drain or external to the building.

•Shall be of material listed for hot water distribution.

•Shall be installed to allow complete drainage of both the valve and discharge line.

Solar Installation

If this water heater is used as a solar storage heater or as a backup for the solar system, the inlet water supply temperatures to the water heater tank may be in excess of 120°F. A tempering valve or other temperature limiting valve must be installed in the inlet water supply line to limit the supply temperature to 120°F.

NOTE: Solar water heating systems can often supply water with temperatures exceeding 180°F and may result in water heater malfunction.

INSTALLATION

CHECKLIST

Water Heater Location

□Centrally located with the water piping system.

□Located indoors and in a vertical position. Protected from freezing temperatures.

□Provisions made to protect the area from water damage. Metal drain pan installed and piped to an adequate drain.

□Sufficient room to service the water heater.

Water System Piping

□Temperature and pressure relief valve properly installed with a discharge line run to an open drain and protected from freezing.

□All piping properly installed and free of leaks.

□Heater completely filled with water. (See Figure 2)

□Closed system pressure buildup precautions installed.

□Tempering valve (when applicable) installed per manufacturer’s instructions (see “Water Temperature Regulation” section).

Electrical Connections

□Wiring and connections comply with all applicable codes.

□Water heater and electrical supply are properly grounded.

□Proper overload fuse or circuit breaker protection installed.

140389, 140449, 121802, E1F50RD045V, 140426 specifications

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