Harsco Industrial 1004905923 Installation & Owner's Manual page 24

3.7.2 Boiler Water Connections
Relief
Valve
Strainer
Boiler
Drain
Schematic showing rear of boiler (for a more detailed view, see section 4.0)
Make water connections as the application warrants or, at a minimum, as shown, but always in compliance with
the local requirements.
Both boiler water connections are 3" pipe, class 150#, ANSI B16.5 flanges. These require a mating flange, bolts,
and a gasket (all field supplied).
NOTICE! Isolating valves must be installed in both water connections for ease of service.
As you are facing the rear of the boiler, the right side connection (with the relief valve on it) is the boiler OUTLET
and must be connected as the hot water supply to the system. The left connection is the boiler INLET and must
be used for the cold water return from the system.
Piping must be installed such that no piping stresses are transmitted to the boiler. The boiler shall not be used
as a pipe anchor.
3.7.3 Boiler Water Piping by Installer
3.7.3.1 Strainer
To avoid possible contamination of the boiler with dirt, rust or sediment from the system, a strainer near the boiler
inlet is strongly recommended. Even new systems may contain sufficient foreign material to eventually reduce
the performance of the heat exchanger. Adequate circulation of good clean water is essential to maximum
efficiency and long life of the boiler.
MODU-FIRE
Isolating
Valve
Outlet to
System
Inlet from
System
Isolating
Valve
Drain
24
®
Forced Draft Gas-Fired Boiler 2500-3000