ProSelect Force Hot Water Oil Boiler Installation Manual

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106346-06 - 8/19
FORCE
Installation, Operating & Service Manual
Figure 11: Recommended Piping for Combination Heating and Cooling (Refrigeration) System
WARNING
The use of a low water cut-off device, while
not required unless radiation level is below the
boiler, is highly recommended.
If a low water cut-off is required, it must be
mounted in the system piping above the boiler.
The minimum safe water level of a hot water boiler
is just above the highest water containing cavity of
the boiler; that is, a hot water boiler must be full of
water to operate safely.
5. If it is required to perform a long term
pressure test of the hydronic system, the
boiler should first be isolated from the system
to avoid a pressure loss due to the escape of
air trapped in the boiler.
To perform a long term pressure test including
the boiler, ALL trapped air must first be
removed from the boiler.
A loss of pressure during such a test, with no
visible water leakage, is an indication that the
boiler contained trapped air.
4 Water Boiler Piping (continued)
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