Unit installation

Refrigerant, Hydraulic and Electrical Connections
72
Figure 59 Connections—water/glycol models
Table 23 Unit connections, water/glycol-cooled models
UNIT CONNECTIONS CR20W CR35W
IWC
1
Water to condenser inlet 1-1/4" FPT 1-1/4" FPT
OWC Water from condenser inlet 1-1/4" FPT 1-1/4" FPT
CD
2
Condensate drain 1" MPT
HF Humidifier feed
1/2" FPT for top connection,
1/4" compression for bottom
HD
2
Humidifier drain 1" MPT
DP Pump drain 1/2" FPT
EC-HV Electrical supply-high voltage
Combination Hole Knockout Diameter:
1-3/8", 1-3/4" and 2-1/2" (35, 44.5 and 63.5mm)
EC-LV Electrical supply-low voltage Hole Diameter: 7/8" (22); Typical 2 places
1. Install a 16-20 mesh strainer on the glycol/water supply to prevent particles from entering the heat exchanger.
2. With pump, CD is connected with HD. See DP.
4-1/8"
(105mm)
6-1/8"
(155mm)
REAR
IWC
EC-LV
CD or DP
BOTTOM CONNECTIONS
(possible with raised floor)
HF/HD
2-15/16"
(74mm)
2-11/16"
(69mm)
8-7/8"
(226mm)
9-3/4"
(248mm)
1-1/8"
(28mm)
12-3/4"
(325mm)
1-3/4"
(44mm)
5-1/8"
(130mm)
7-13/16"
(199mm)
2-3/16"
(56mm)
3-1/16"
(77mm)
3-7/8"
(98mm)
EC-HV
OWC
3-13/16"
(97mm)
1-3/8"
(35mm)
EC-HV
EC-LV
HF
DP
OWC
IWC
TOP
CONNECTIONS
46-1/4"
(1175mm)
5"
(127mm)
1-3/4"
(45mm)
2-11/16"
(69mm)
9-1/2"
(242mm)
3-1/4"
(83mm)
23-5/8"
(600mm)
3-1/4"
(83mm)
17-5/16"
(440mm)
3-1/16"
(77mm)
9-5/16"
(237mm)
2-11/16"
(69mm)
2-3/16"
(56mm)
2-1/8"
(54mm)
Piping and electrical
connections available
at the top and bottom
of unit.
DPN001793
Rev. 0