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CHAPTER 4
CHAPTER 4 - BOILER PIPING
4.1. General Piping Requirements
• All plumbing must meet or exceed all local, state
and national plumbing codes.
• 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 PRESTIGE Solo
from the system piping.
Use a two-wrench method when tightening
field piping onto the boiler piping connections.
Use one wrench to prevent the boiler connec-
tions from turning and the second to tighten
field piping. Failure to support the boiler pip-
ing connections could damage piping, causing
a leak, resulting in substantial property dam-
age, serious injury, or death.
WARNING
Boiler Return Connection
with Tee Fitting and
Boiler Drain Valve
(field supplied)
Boiler Supply
Connection
Plu
Pressure Relief Valve
(Supplied with Boiler)
3/4" Street Elbow
Air Vent
Drain Piping Directed
to a Suitable
Place of Drainage
Fig. 5 - Pressure Relief Valve and Boiler Drain Valve Installation
4.2. Pressure Relief Valve
1. The PRESTIGE Solo is supplied with a 30 psi pressure
relief valve and must be piped using the PRV con-
nection as shown in Fig. 5 below.
2. To avoid potential water damage to the surround-
ing area or potential scalding hazard due to the op-
eration of the relief valve, the discharge piping:
• Must be connected to the discharge outlet of the
relief valve and directed to a safe place of disposal.
• Length should be as short and direct as possible.
The size of the discharge line must not be reduced,
maintain the same size as the outlet of the relief
valve.
• Must be directed downward towards the oor
at all times. The piping should terminate at
least 6 inches [153 mm] above any drain con-
nection to allow clear visibility of the discharge.
• Must terminate with a plain end, not with a threaded
end. The material of the piping must have a service-
able temperature rating of 250ºF or greater.
• Must not be subject to conditions where freez-
ing could occur.
• Must not contain any shut-o valves or ob-
structions. No shut-o valve should be piped
between the boiler and relief valve.
Failure to comply with the guidelines on
installing the pressure relief valve and dis-
charge piping can result in substantial prop-
erty damage, serious injury, or death.
WARNING
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