Pressure & Temperature Relief Valve Installation - Watts Aerco Innovation 800 User Manual

Innovation Hot Water Hot Water Boiler User Manual
HOT WATER OUTLET
RECIRCULATION
PUMP
HEAT EXCHANGER
REAR VIEW – RIGHT-REAR PANEL & EXHAUST VENT REMOVED
2.8 PRESSURE & TEMPERATURE RELIEF VALVE INSTALLATION
An ASME rated Pressure & Temperature (P&T) Relief Valve must be installed on each
Innovation hot water boiler on the hot water outlet at the top of the Recirculation Loop Assembly
as shown in Figure 2-5. The valve setpoint is 150 psig (1,034 kPa) at 210°F (98.9° C).
A suitable pipe joint compound should be used on the threaded connections. Any excess should
be wiped off to avoid getting any into the valve body. The relief valve should be piped to within
12 inches (30.5 cm) of the floor to prevent injury in the event of a discharge. The relief outlet
piping must be equal to the outlet size of the relief valve without reduction. No valves,
restrictions, or other blockages are allowed in the discharge line. In multiple unit installations the
discharge lines must not be manifolded together. Each must be individually run to a suitable
discharge location.
OMM-0120_0A
GF-128-I
CHAPTER 2 – INSTALLATION
Figure 2-5. Recirculation Loop
AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913
Phone: 800-526-0288
- INTERNATIONAL
P&T VALVE
RECIRCULATION
LOOP PIPING
COLD WATER INLET
DRAIN VALVE
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11/15/2016