Benchmark 6000 Boiler Installation, Operation & Maintenance Manual
CHAPTER 2 – INSTALLATION
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20
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AERCO International, Inc.
•
100 Oritani Dr.
•
Blauvelt, NY 10913
OMM-0086_0D
03/20/14
Ph.: 800-526-0288
GF-133
Figure 2-4: Supply and Return Locations
2.6 PRESSURE RELIEF VALVE & PRESSURE/TEMPERATURE INDICATOR
INSTALLATION
2.6.1 Pressure Relief Valve Installation
Depending on the pressure required, the Benchmark 6000 is supplied with either a single 2” or
two (2) 1¼“ ASME rated Pressure Relief Valves. The pressure rating for the relief valve must be
specified on the sales order. Available pressure ratings range from 30 psi to 160 psi, depending
on pressure vessel maximum rated pressure. Each pressure relief valve is furnished as a kit
(92102-Tab) which consists of the relief valve for the pressure rating specified on the Sales
Order. The appropriate size reducing bushing and nipple are also included in the kit. The
pressure relief valves, nipples and bushings are connected to 45º street elbows already installed
on the heat exchanger of the boiler. The relief valves are installed on the top of the boiler as
shown in Figure 2-5A. A suitable pipe joint compound should be used on all threaded
connections. Any excess should be wiped off to avoid getting any joint compound into the valve
body. Each relief valve must be piped to within 12 inches of the floor to prevent injury in the
event of a discharge. The discharge piping must be full size, without reduction. No valves, or size
reductions 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.
6” WATER OUTLET
AIR INLET
6” WATER INLET
2” GAS INLET
EXHAUST
MANIFOLD
CONDENSATE
DRAIN
