Unit installation

Refrigerant, Hydraulic and Electrical Connections
71
APPENDIX D-REFRIGERANT, HYDRAULIC AND ELECTRICAL CONNECTIONS
Figure 58 Connections—air-cooled models
Table 22 Unit connections, air-cooled models
Unit Connections CR20A CR35A
IL Refrigerant liquid line inlet OD 1/2" Cu Sweat OD 5/8" Cu Sweat
OG Refrigerant gas line outlet OD 5/8" Cu Sweat OD 7/8" Cu Sweat
CD
1
Condensate drain 1" MPT
HF Humidifier feed
1/2" FPT for top connection,
1/4" compression for bottom connection
HD
1
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. With pump, CD is connected with HD. See DP.
REAR
IL
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
OG
3-13/16"
(97mm)
1-3/8"
(35mm)
EC-HV
EC-LV
HF
DP
OG
IL
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)
Unsolder when
connecting
through bottom
Piping and electrical connections
available at the top and bottom
of unit.
Attention: Air-cooled systems may
require additional oil to be added
in the field in order to allow for
sufficient compressor lubrication.
Please see the user manual for
details.
DPN001792
Rev. 0