Installation / Operation Instruction Manual

Water Connections continued-

WARNING

For protection against excessive temperatures and pressure, install

temperature and pressure protective equipment required by local codes,

but not less than a combination temperature and pressure relief valve

certified by a nationally recognized testing laboratory that maintains

periodic inspection of production of listed equipment or materials as

meeting the requirements of the Standard for Relief Valves and

Automatic Gas Shutoff Devices for Hot Water Supply Systems, ANS

Z21.22 or the Standard CAN1-4.4. Temperature and Pressure and the

Standard CAN1-4.4, Temperature, Pressure, Temperature and

Pressure Relief Valves and Vacuum Relief Valves. The combination

temperature and pressure relief valve must be marked with a maximum

set pressure not to exceed the maximum working pressure of the water

heater. The combination temperature and pressure relief valve must

also have an hourly rated temperature steam BTU discharge capacity

not less than the hourly rating of the water heater.

Install the combination temperature and pressure relief valve into the

opening provided and marked for this purpose on the water heater.

Note: Some models may already be equipped or supplied with a

combination temperature and pressure relief valve. Verify that the

combination temperature and pressure relief valve is in compliance with

local codes. If the combination temperature and pressure relief valve

does not comply with local codes, replace it with one that does. Follow

the installation instructions above on this page.

Install a discharge line so that water discharged from the combination

temperature and pressure relief valve will exit within 6 in (15.2 cm)

above, or any distance below the structural floor and cannot contact any

live electrical part. The discharge line is to be installed to allow for

complete drainage of both the combination temperature and pressure

relief valve and the discharge line. The discharge opening must not be

subjected to blockage or freezing. DO NOT thread, plug or cap the

discharge line. It is recommended that a minimum clearance of 4 in

(10.2 cm) be provided on the side of the water heater for servicing and

maintenance of the combination temperature and pressure relief valve.

DO NOT place a valve between the combination temperature and

pressure relief valve and the tank.