General Layout; Table 5 Condenser Positioning; Table 6 Liebert Crv Position Relative To The Remote Condenser - Emerson Liebert CRV User Manual

6.2.1

General Layout

1. Piping must be Type ACR copper tubing and sized per Tables 7, 8, 9 and 10.
NOTE
All field-installed piping must comply with applicable national, state and local codes.
Use the shortest possible refrigeration pipelines to minimize the total charge of refrigerant and
the number of pressure drops.
2. Minimize the number of bends and make the bends the largest radius practical to prevent
constricting refrigerant flow.
3. Insulate the piping as specified in Table 5. If the pipes are installed next to electrical cables, they
must be isolated from the building using vibration-isolating supports to avoid damage to cable
insulation.
4. There must be at least one inch (25mm) separation between the gas and liquid pipelines. If this is
not possible, insulate both lines.
5. Support both horizontal and vertical pipes with vibration-damping clamps, which include rubber
gaskets. Place these clamps every 5 to 7 ft. (1.5 to 2m).
Table 5 Condenser positioning
Condenser
Position
Indoor
Discharge
Line
Outdoor
Insulation
Indoor
Liquid
Line
Outdoor
Layout
** See Table 6
Table 6 Liebert CRV position relative to the remote condenser
Parameter
From Liebert CRV to condenser
From Liebert CRV to VFD condenser
From Liebert CRV to Liebert Lee-Temp
Requirements
Oil traps on vertical line of gas refrigerant
® ™
Liebert CRV
Condenser Above
Liebert CRV
necessary
only for aesthetic reasons
only for aesthetic reasons
only for aesthetic reasons
Room Unit
* Oil traps every 15 ft. (4.6m)
of vertical piping
Maximum Distances, ft. (m)
300 (91.4) equivalent length
Above: 60 (18.3)
™
condenser Above: 60 (18.3)
Condenser and
Liebert CRV
at Same Level
necessary
only for aesthetic reasons
only for aesthetic reasons
only if exposed to sun
Room Unit
Gas
Liquid
Below: 15 (4.5)
Below: 0 (0)
Every 15 (4.6)
20
Refrigerant Connections
Condenser Below
Liebert CRV
(Not Recommended)
necessary
only for aesthetic reasons
no (expose to cold under-floor air)
only if exposed to sun
Room Unit
Liquid