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Liebert
®
Mini-Mate2
™
20
Figure 11 Refrigerant piping diagram
Refrigerant Charge Requirements—Total refrigerant charge will be required only if units are
evacuated during installation or maintenance. For safe and effective operation, refer to 5.4.3 - Piping
Connections and Coolant Requirements.
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
Nominal System
Size Tons
Maximum
Equivalent Pipe
Length, ft. (m)
Maximum PFH Level
Above Evaporator, ft. (m)
Maximum PFH Level
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.
Evaporator
Evaporator
Condensing
Unit
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) .
Pitch down 1/2" (13mm) per 10 ft. (3m)
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.
Suction Line Piping
Condensing Unit
Below Evaporator
Condensing
Unit
Pitch down 1/2" (13mm) per 10 ft. (3m)
See Table 10 for recommended maximum
vertical rise above evaporator/maximum
vertical fall below evaporator.