GF-135
Esteem 399 Low NOx Boiler
Chapter 5
OMM-0089_0A
Installation, Operation & Maintenance Manual
Boiler Piping
Page
31
of
188
AERCO International, Inc.
•
100 Oritani Dr.
•
Blauvelt, NY 10913
OMM-0089_0A
MC1 06/19/14
Ph.: 800-526-0288
CHAPTER 5:
BOILER PIPING
5.1 GENERAL PIPING REQUIREMENTS
•
All plumbing must meet or exceed all local, state and national plumbing codes.
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Support all piping using hangers. DO NOT support piping by the unit or its components.
•
Use isolation valves to isolate system components.
•
Install unions for easy removal of the Esteem boiler from the system piping.
WARNING!
Use a two wrench method when tightening piping onto the boiler
connections. Use one wrench to prevent the boiler piping from
turning/twisting. Failure to support the boiler piping and
connections in this manner could cause damage to the boiler and
its components.
5.2 PRESSURE RELIEF VALVE
WARNING!
Failure to comply with the guidelines on installing the pressure
relief valve and discharge piping can result in personal injury,
death or substantial property damage.
•
The Esteem 399 Low NOx boiler is supplied with a 80 psi pressure relief valve and must
be piped using the PRV connection as shown in Figure 5-1.
•
To avoid potential water damage to the surrounding area or potential scalding hazard due
to the operation of the relief valve, the discharge piping:
o
Must be connected to the discharge outlet of the relief valve and directed to a safe
place of disposal.
o
Length should be as short and direct as possible. The size of the discharge line
should not be reduced, maintain the same size as the outlet of the relief valve.
o
Should be directed downward towards the floor at all times. The piping should
terminate at least 6 inches [153 mm] above any drain connection to allow clear
visibility of the discharge.
o
Should terminate with a plain end, not with a threaded end. The material of the piping
should have a serviceable temperature rating of 250ºF or greater.
o
Should not be subject to conditions where freezing could occur.
o
Should not contain any shut-off valves or obstructions. No shut-off valve should be
piped between the boiler and relief valve.
