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water heater installation

remote storage tank that may be installed and piped to a

water heating appliance must also have its own properly

sized, rated and approved Temperature-Pressure Relief

Valve installed. Call the toll free technical support phone

number listed on the back cover of this manual for further

assistance in sizing a T&P valve for remote storage tanks.

t&p ValVe discharge pipe

Explosion Hazard

Temperature-Pressure Relief Valve

must comply with ANSI Z21.22-

CSA 4.4 and ASME code.

Properly sized temperature-

pressure relief valve must be

installed in opening provided.
Can result in overheating and

excessive tank pressure.
Can cause serious injury or death.

This water heater is provided with a properly rated/sized and

certified combination temperature - pressure (T&P) relief valve by

the manufacturer. See Temperature-Pressure Relief Valve on pages

13-14 for information on replacement and other requirements.

Water Damage Hazard

Temperature-Pressure Relief Valve discharge

pipe must terminate at adequate drain.

•

CAUTION

Install a discharge pipe between the T&P valve discharge opening and

a suitable floor drain. Do not connect discharge piping directly to the

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 adequate quantities should circumstances

demand. If the discharge pipe is not connected to a drain or other

suitable means, the water flow may cause property damage.

t&p Valve discharge pipe requirements:

• 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 not be exposed to freezing temperatures.
•  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 floor 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 or other obstruction between the

relief valve and the drain.

water line connections

The water piping installation must conform to these instructions

and to all local code authority having jurisdiction. good practice

requires that all heavy piping be supported.
Read and observe all requirements in the following sections

before installation of the water piping begins:
1.  Water Temperature Control and Mixing Valves on page 12.
2.  Dishwashing Machines on page 13.
3.  Closed Systems and Thermal Expansion on page 13.
4.  Temperature-Pressure Relief Valve on page 13.
5.  For multiple water heater installations see Water Piping

Diagrams beginning on page 34.

This manual provides detailed installation diagrams (see pages

34-48 of this manual) for typical methods of application for the

water heater(s).

water (potaBle) heating and space heating

1. All piping components connected to this unit for space heating

applications shall be suitable for use with potable water.

2. Toxic chemicals, such as those used for boiler treatment, shall

nEVER be introduced into this system.

3. This unit may nEVER be connected to any existing heating

system or component(s) previously used with a non-potable

water heating appliance.