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110547-01 - 4/20
FORCEVFO Installation & Service Manual
Figure 4-1: Recommended Piping for Combination Heating and Cooling (Refrigeration) System
4 Water Boiler Piping and Trim (continued)
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.
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