Data Aire gForce DX series - Connection Sizes, Water;Glycol Cooled Units; Connection Sizes, Fluid Coolers; Auxiliary Chilled Water;Energy Saver Coil Piping; Condensate Drain Piping

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2.7.12 Connection Sizes, Water/Glycol Cooled Units
Model Number Water In Water Out
GFW or G* 021 1-5/8” (41 mm) O.D. 1-5/8” (41 mm) O.D.
GFW or G* 028 1-5/8” (41 mm) O.D. 1-5/8” (41 mm) O.D.
GFW or G* 035 1-5/8” (41 mm) O.D. 1-5/8” (41 mm) O.D.
GFW or G* 046 1-5/8” (41 mm) O.D. 1-5/8” (41 mm) O.D.
GFW or G* 056 2-1/8” (54 mm) O.D. 2-1/8” (54 mm) O.D.
GFW or G* 070 2-1/8” (54 mm) O.D. 2-1/8” (54 mm) O.D.
GFW or G* 091 2-1/8” (54 mm) O.D. 2-1/8” (54 mm) O.D.
GFW or G* 106 2-1/8” (54 mm) O.D. 2-1/8” (54 mm) O.D.
* D=Downow U=Upow
2.7.13 Connection Sizes, Fluid Coolers
The information regarding uid 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)
eld connections.
2.7.14 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
User Manual. Units with an Energy Saver cooling coil have shared piping with the condenser supply
and 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.
2.8 Condensate Drain Piping
Every indoor unit has a 3/4” (19 mm) copper stub provided for condensate removal. A union is
recommended at the eld 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, a condensate
pump can be used. Condensate pumps are either factory mounted or shipped loose. Factory mounted
condensate pumps do not require a separate power source.
Condensate pumps shipped loose (or eld provided) typically require a dedicated 110 volt power
source. Field pipe connections must be made to the pump discharge connection. A check valve must
be installed to prevent short cycling. See condensate pump electrical requirements in Section 3.9.