Chapter 2 - Domestic Piping; Temperature & Pressure (T&P) Relief Valve; Standard Installation - TriangleTube PRESTIGE Excellence 110 Installation & Maintenance Manual

CHAPTER 2 - DOMESTIC PIPING

2.1. Temperature & Pressure (T&P) Relief
Valve
CAUTION
To reduce risk of excessive pressures and
temperatures in the water heater, install tem-
perature and pressure protective equipment
required by local codes, but no less than a
combination temperature and pressure relief
valve certified by a nationally recognized test-
ing laboratory that maintains periodic inspec-
tion of production of listed equipment or ma-
terials, as meeting the requirements for Relief
Valves and Automatic Gas Shutoff Devices for
Hot Water Supply Systems, ANSI Z21.22. This
valve must be marked with a maximum work-
ing pressure of the water heater.
Failure to comply with this instruction can re-
sult in minor property damage, or injury.
DHW Hot
Water Outlet
Fig. 1 - Standard Installation of the T&P Relief Valve
The PRESTIGE Excellence water heater must be protect-
ed with a T&P relief valve.
Size the Excellence T&P relief valve by the following
specifications, unless they conflict with local codes:
• 3/4" NPT with an AGA Rating of 100,000 BTU/hr
(Watts 100XL-8 or equivalent).
NOTICE
For proper operation of the T&P and to prevent
the T&P from activating due to boiler water
temperature, use a T&P relief valve with ex-
tended element. An 8" minimum length is rec-
ommended.
2.2.

Standard Installation

Install T&P relief valve in the Auxiliary connection locat-
ed behind the DHW cold water inlet on the top of the
water heater as shown in Fig. 1 below.
DHW Aux. Connection
(T&P Relief Valve)
Manual Air Vent
DHW Cold Water
Inlet
3