13
2.2.1 Connection Sizes, Water/Glycol Cooled Units
Evaporator
Water IN and OUT
Model
Connections,
OD
DAMA 0112
3/4”
DAMA 1.512
3/4”
DAMA 0212
3/4”
DAMA
2.512
3/4”
2.2.2 Connection Sizes, Fluid Coolers
Fluid Cooler
Water IN and OUT
Model
Connections,
OD
DAFC 06
1-5/8”
DAFC 07
1-5/8”
DAFC 09
1-5/8”
DAFC 11
2-1/8”
DAFC 15
2-1/8”
DAFC 17
2-5/8”
2.3 Auxiliary Chilled Water/Energy Saver Coil Piping
Units with an Auxiliary Chilled Water cooling coil require a separate source of chilled water. The
chilled water connection sizes will be equal to the condenser water connection sizes on the chart in
Section 2.2.2. Units with an Energy Saver cooling coil have shared piping with the condenser supply
and therefore do not require a separate water source.
2.4 Condensate Drain Piping
The evaporator section has a 3/4” FPT connection on the bottom for condensate removal. Vertical
units have the 5” plenum below the evaporator drain pan with knockouts that allow fi eld supplied
and installed condensate lines to be routed out either side of the unit. A union is recommended at
the fi 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” for each ten feet of horizontal run. Do not reduce the size
of the drain line. Where local codes permit, PVC pipe may be used.
Some applications have no convenient means of allowing a gravity drain. In this case, a condensate
pump can be used. These come either factory mounted or shipped loose. Factory mounted
condensate pumps do not require a separate power source.
Condensate pumps shipped loose (or fi 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 backfl ow. Also see condensate pump electrical requirements in Section
3.9.
