Harsco Industrial MACH C1500GG Installation & Owner's Manual page 27

3.7.2 Boiler Inlet and Outlet Connections
All water connections should be in compliance with national, state and local code requirements.
Notice! The boiler is furnished with 2.5"
grooved connections for Victaulic Style
Couplings. These coupling must be used
with the EPDM Victaulic seals. Adapters from
Victaulic to NPT are available from the
factory. Isolating valves must be installed in
both water connections for ease of service.
The bottom rear connection to the boiler is the
INLET and must be used for the return from the
system.
The top vertical connection to the boiler is the
OUTLET and must be connected as the supply to
the system.
NOTICE! Condensate Trap must be piped to
drain in accordance with all national, state
and local codes. If installed outdoors, it must
be field heat traced.
3.7.3 Boiler Water Piping by Installer
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.
Relief Valve Piping
Each boiler is supplied with a pressure-relief valve sized in accordance with ASME requirements. Lower pressure
relief valves are available, contact your Harsco Industrial, Patterson-Kelley representative. The relief valve should be
piped to a suitable floor drain. Reducing couplings or other restrictions are not permitted in the discharge line.
Low Water Cut-off
The boiler is furnished with a probe-type low water cut-off; no field piping is required. If the water level in the boiler
drops below the probe, the boiler will shut down and a LOCKOUT LOW WATER LEVEL will be displayed on the
control panel. The low water cutoff circuit will automatically reset when the low water condition clears; however the
boiler controls will retain the lockout condition until the reset button on the display is depressed.
NOTICE! The low water cutout probe only prevents boiler operation when the water level in the boiler is
insufficient. It does not detect low water conditions in other parts of the system. Installation of high point
vents or additional low water safety devices to protect the system should be considered.
Installation of external limit controls may be required by certain codes or in certain installations. Review applicable
local codes for details.
Drain Valve and Piping
Page 27
MACH® Gas-Fired Boiler