Standard installation
•
Install the T&P relief valve in the connection marked
“Relief
Valve”.
T&P relief valve discharge piping
T&P relief valve discharge piping
MUST
be:
- made of material serviceable for a temperature of 250°F
or
greater.
- directed so that hot water flows away from all
persons.
- directed to a suitable place for disposal.
- installed so as to allow complete draining of the T&P
relief valve and discharge line.
- terminated within 6" of the floor.
WARNING
Do not install any valve between the T&P
relief valve and the tank connection or
on the T&P relief valve discharge piping.
Improper placement and piping of T&P
relief valve can cause severe personal injury,
death or substantial property damage.
CAUTION
The T&P relief valve is not intended for
constant duty, such as relief of pressure
due to repeated normal system expansion.
Correct this condition by installing a
properly sized expansion tank in a domestic
water system. Refer to the expansion tank
manufacturer’s installation instructions for
proper sizing.
4
Domestic side (tank) piping
(continued)
WARNING
Failure to install and maintain a new, listed
3/4" X 3/4" T&P relief valve will release
the manufacturer from any claim which
might result from excessive temperature
and pressures.
Table 4A
Minimum Relief Valve (CSA Rating)
Model
Btu/hr
GIT040
105,000
GIT050
105,000
GIT080
205,000
GIT119
205,000
Figure 4-2 Recommended Domestic Water Piping
T&P relief valve discharge piping
MUST NOT
be:
- excessively long. Using more than two (2) elbows or 15
feet of piping can reduce discharge capacity.
- directly connected to a drain. Refer to local codes.
- subject to freezing.
EXPANSION
TANK
UNION
(TYPICAL)
SHOCK ARRESTOR
SHUT-OFF VALVE
SHUT-OFF
VALVE
BACKFLOW
PREVENTOR
SHUT-OFF
VALVE
SHUT-OFF
VALVE
ANTI-SCALD
MIXING VALVE
DRAIN
( FIELD SUPPLY)
RECIRCULATION
PUMP
TO BOILER
FROM BOILER
CHECK VALVE
TANK SENSOR/
AQUASTAT
INDIRECT
13
Please note that these illustrations are meant to show system piping concept only, the installer
is responsible for all equipment and detailing required by local codes.
NOTICE
Glass Lined Indirect Water Heater Installation & Operation Manual