Emerson Liebert MC Microchannel Outdoor Condenser 28 - 220kW Manuel D’Utilisation

Pump-down must be disabled on the indoor unit when using the Liebert MC condenser, due to the 

reduced volume in the condenser coil. When applying the Liebert MC condenser to existing Liebert 

indoor units, Emerson

®

 recommends adding a discharge line check valve and crankcase heater to 

provide suitable compressor protection. Additional liquid line Schrader ports are required at the 

indoor unit to properly charge systems with Liebert MC condensers applied.

Consult the user manual for the indoor unit to determine whether additional oil is required for each 

circuit. Factors such as compressor, condenser type, piping lengths, and total circuit refrigerant 

charge influence this requirement.

Procedures for leak check and evacuation of the entire refrigeration system are contained in the 

indoor unit’s installation manual. Use the proper manual section corresponding to the winter control 

system used on the condenser (with or without Liebert Lee-Temp

™

 or Liebert DSE

™

 receivers) and the 

refrigerant to be charged into the system.

Consult the indoor unit’s manual for charging systems with Liebert Lee-Temp receivers. These 

procedures will be identical to systems with fin/tube condenser coils, but the refrigerant volumes will 

be much lower. Consult Tables 10 and 11 for condenser with Liebert Lee-Temp refrigerant required.

Consult the Liebert DSE’s manual (SL-18925) for charging Liebert DSE systems. All Liebert DSE 

units require installation of a Liebert DSE receiver on each condenser circuit, with or without a 

Liebert EconoPhase pump module installed. Consult Table 11 for condenser and receiver refrigerant 

requirements.

3/8

—

3.7 (1.7)

—

—

1/2

—

6.9 (3.1)

—

5.0 (2.1)

5/8

2.2 (1.0)

11.0 (5.0)

1.1 (0.51)

10.0 (4.2)

3/4

3.1 (1.3)

15.7 (7.1)

1.5 (0.67)

13.0 (5.7)

7/8

4.5 (1.9)

23.0 (10.4)

2.3 (1.0)

21.0 (9.5)

1-1/8

7.8 (3.5)

39.3 (17.8)

3.9 (1.8)

34.9 (15.6)

1-3/8

11.8 (5.4)

59.8 (27.1)

5.5 (2.5)

53.2 (23.8)

1-5/8

16.7 (7.6)

—

—

—

Charge based on Type ACR/Type L copper pipe
Source: DPN002411, Rev. 3