Start Unloading (Su); Capacity Control (Crii) - Bitzer 2KES-05 Instructions De Service

4.4.1

Start unloading (SU)

Option for:
• 4VE(S)-6Y .. 4NE(S)-20(Y)
• 4JE-13Y .. 4FE-35(Y)
• 6JE-22Y .. 6FE-50(Y)
• 4VDC-10Y .. 4NDC-20Y
Retrofitting requires the cylinder head in question to be
replaced.
• 8GE-50(Y) .. 8FE-70(Y)
Start unloading (SU)
SU
2 (HP)
4VE(S)-6(Y) .. 4NE(S)-20(Y)
4VCD-10Y .. 4NDC-20Y
Fig. 4: Position of the cylinder heads and valve top parts for start unloading in case of factory mounting
2 (HP) Discharge gas temperature sensor
4.4.2

Capacity control (CRII)

optionally for:
• 2EES-2(Y) .. 2CES-4(Y)
• 4FES-3(Y) .. 4BES-9(Y)
• 4VE(S)-6Y .. 4NE(S)-20(Y)
• 4JE-13Y .. 4FE-35(Y)
• 6JE-22Y .. 6FE-50(Y)
• 8GE-50(Y) .. 8FE-70(Y)
• 22EES-4(Y) .. 66FE-100(Y)
KB-104-7
CRII SU
2 (HP)
4JE-13Y .. 4FE-35(Y)
The motor of the 8-cylinder compressor equipped with
a special winding wiring guarantees a high torque even
in case of a part winding start. This is why no start un-
loading is required for these compressors.
Mounting position of the valve top parts for start un-
loading, see figure 4, page 11.
Mounting the discharge gas temperature sensor, see
chapter Discharge gas temperature sensor, page 20.
The start unloading requires a check valve in the dis-
charge gas line. For detailed information on the start
unloading, see Technical Information KT-110.
CRII
CRII (2)
6JE-22Y .. 6FE-50(Y)
• 4FDC-5Y .. 4CDC-9Y
• 4VDC-10Y .. 4NDC-20Y
Retrofitting requires the cylinder head in question to be
replaced.
Mounting position of the valve top parts for capacity
control, see figure 5, page 12.
• Tandem compressors: With a possible load se-
quence switching in mind, both compressor parts
should be equipped with the same number of CRII
cylinder heads, see figure 5, page 12.
For detailed information on the CRII system, the capa-
city control for ECOLINE compressors, see Technical
Information KT-101.
SU
CRII (1)
2 (HP)
11