Site Preparation and Installation
Figure 11 Refrigerant piping diagram
Evaporator
Suction Line Piping
Condensing Unit
Below Evaporator
Evaporator
Pitch down 1/2" (13mm) per 10 ft. (3m)
NOTE
When installing remote condensing units below the evaporator, the suction gas line should be trapped with an inverted trap to the height of the evaporator . This prevents refrigerant migration to the compressors during off cycles . Maximum recommended vertical level drop to condensing unit is 15 ft. (4.6m) .
Condensing
Unit
Condensing | See Table 10 for recommended maximum |
vertical rise above evaporator/maximum | |
Unit | vertical fall below evaporator. |
|
|
Suction Line Piping
Condensing Unit Above Evaporator
Traps recommended at the base of riser exceeding 5 ft (1.5m) and every 20 feet (6m) of vertical rise.
Pitch down 1/2" (13mm) per 10 ft. (3m)
NOTE
If field supplied refrigerant piping is installed, refrigerant must be added to the system.
Table 10 Pipe length and condenser elevation relative to evaporator
| Maximum |
|
|
Nominal System | Equivalent Pipe | Maximum PFH Level | Maximum PFH Level |
Size Tons | Length, ft. (m) | Above Evaporator, ft. (m) | Below Evaporator, ft. (m) |
5 | 150 (45) | 50 (15) | 15 (4.6) |
|
|
|
|
Maximum recommended total equivalent pipe length is 150 ft (46m). Suction and liquid lines may require additional specialty items when vertical lines exceed 20 ft. (6m) and/or condensing unit installation is more than 15 ft. (4.6m) below the evaporator. Contact Emerson Application Engineering for assistance.
Refrigerant Charge
Liebert® | 20 |
