Connection Sizes, Fluid Coolers (Dry Coolers)
The information regarding Fluid Cooler (or often referred to as a “dry cooler”) connection sizes
can be found in the individual Fluid Cooler User Manuals which should be referred to for more
complete details.
Models GHFC-200 and larger are double-wide units. Although the header connection for each
section is 2-5/8” (67 mm), each unit comes with a factory provided header manifold kit with 3-
1/8” (79 mm) field connections.
Auxiliary Chilled Water/Energy Saver Coil Piping
Units with Auxiliary Chilled Water-cooling coil require a separate source of chilled water. These
chilled water connection sizes will be equal to the condenser water connection sizes shown in
the Fluid Cooler Operation, Installation and Maintenance manual. Units with an Energy Saver
cooling coil have shared piping with the condenser supply and return therefore do not require a
separate water source.
All chilled water pipes have a cap installed on the end of the pipe for factory pressure testing of
the system. These caps need to be removed before installing the water piping to the unit. Use
a tube cutter for smaller pipes and reciprocating saw with a metal cutting blade for larger pipes
or if there is a clearance problem. All connections need to be cleaned before connections are
brazed together.
Condensate Drain Piping
Every indoor unit has a 3/4” (19 mm) copper stub provided for condensate removal. A union
(field pro- vided) is recommended at the field connection which will permit easy disconnection
from the unit for cleaning.
A trap should be built into the drain line to prevent air from backing up into the unit. Drain lines
should be pitched downward not less than 1/4” (6.35 mm) for each ten (10) feet (3.1 m) of
horizontal run. Do not reduce the size of the drain line.
Some applications have no convenient means of allowing a gravity drain. When required, an
optional condensate pump can be used. Condensate pumps are either factory mounted or
shipped loose. Fac- tory mounted condensate pumps do not require a separate power source.
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