Refrigerant Connections for Air-Cooled Units
35 Liebert
®
CRV
™
Figure 26 Piping line cooling unit
Table 9 Condenser positioning—Liebert MC and fin/tube condenser with or without Liebert Lee-Temp
Condenser
Position
Condenser Above
Liebert CRV
Condenser and
Liebert CRV
at Same Level
Condenser Below
Liebert CRV
(Not Recommended)
Insulation
Discharge
Line
Indoor necessary necessary necessary
Outdoor only for aesthetic reasons only for aesthetic reasons only for aesthetic reasons
Liquid
Line
Indoor only for aesthetic reasons only for aesthetic reasons no (expose to cold under-floor air)
Outdoor only for aesthetic reasons only if exposed to sun only if exposed to sun
Layout
** See Table 10
Table 10 Liebert CRV position relative to the remote condenser—Liebert MC and fin/tube condenser with
or without Liebert Lee-Temp
Parameter Maximum Distances, ft. (m)
From Liebert CRV to condenser 300 (91.4) equivalent length
From Liebert CRV to VFD condenser Above: 60 (18.3) Below: 15 (4.5)
From Liebert CRV to Liebert Lee-Temp
™
condenser Above: 60 (18.3) Below: 0 (0)
Requirements
Oil traps on vertical line of gas refrigerant
Base of Rise Exceeding 5 (1.5) and
Every 15 (4.6)
15 ft. (4.6m)
(See *)
Gas
Liquid
* Oil traps every 15 ft. (4.6m)
of vertical piping
Room Unit
(See **)
Gas
Liquid
Room Unit
CDT
COND
(Distance) D = A+B+C
CDT = Conditioner
COND = Condenser
C
B
A
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