gForce Ultra IOM
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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 System
Every indoor unit has a 3/4” (19 mm) copper stub provided for condensate removal. A union (field
provided) 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. The
following are recommendation for condensate drain systems:
1. Do not reduce the size of the condensate drain line.
2. The condensate drain piping must be run to an unrestricted waste line and must be protected
from freezing.
3. In high humidity conditions it is recommended to insulate the condensate drain line to prevent
condensation forming on the exterior of the piping.
4. It is recommended that a union (field supplied) be installed at the 3/4” (19 mm) FPT
connection to permit easy disassembly of the condensate drain piping from the unit for
cleaning.
5. 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.
6. Where local codes permit, PVC pipe may be used.
Some applications have no convenient means of allowing a gravity drain. When required, an optional
condensate pump for a Data Cool unit can be used. Condensate pumps can be internally mounted and
powered from the unit or externally mounted and powered from separate power source which are
shipped loose.
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