Compressors for R744 (CO2)

The capacity regulators protrude approximately 9 cm from the surface of the cylinder head. The arrangement can be seen in the following illustrations.

Since the capacity regulators are designed using the bypass principle (Construction and function of the capacity regulators), they can also be used for start unloading.

Example of a 4-cylinder compressor for R744 (CO2): 4MTE with 2 CRII capacity regulators and compressor module CM-RC-02.
Example of a 4-cylinder compressor for R744 (CO2): 4MTE with 2 CRII capacity regulators and compressor module CM-RC-02.
Example of a 4-cylinder compressor for R744 (CO2): 4CTE with 2 CRII capacity regulators and compressor module CM-RC-02.
Example of a 4-cylinder compressor for R744 (CO2): 4CTE with 2 CRII capacity regulators and compressor module CM-RC-02.
Example of an 8-cylinder compressor for R744 (CO2): 8CTE with 4 CR capacity regulators and compressor module CM-RC-02.
Example of an 8-cylinder compressor for R744 (CO2): 8CTE with 4 CR capacity regulators and compressor module CM-RC-02.

Maximum equipment of the cylinder banks

Maximum equipment of the cylinder banks for compressors for R744 (CO2)

Compressors

Equipment of the cylinder banks with capacity regulators

2-cylinder compressors

2MTE .. 2KTE

max. 1 cylinder head

4-cylinder compressors

4PTE(M)(U) .. 4KTE(M)(U)
4JTE(M)(U) .. 4CTE(M)(U)

max. 2 cylinder heads

6-cylinder compressors

6FTE(M)(U) .. 6CTE(M)(U)

max. 2 cylinder heads

8-cylinder compressors

8FTE .. 8CTE

max. 4 cylinder heads

Compound systems with a larger number of compressors

for control accuracy etc. see

  • KT-600: Parallel compounding of BITZER reciprocating compressors

Positions and dimensions with CM-RC-02

The following illustrations show the positions of the capacity regulators on several compressors for transcritical R744 applications with the compressor module CM-RC-02. The dimensions for other compressors are available in the BITZER Software under the "Dimensions" tab for the respective compressor.

The module housing for the CM-RC-02 has been enlarged compared to the CM-RC-01, meaning that compressors with a CM-RC-02 are approx. 12 mm higher than those with a CM-RC-01.

Compressors 4PTE(U) .. 4KTE(U) with 2 CRII capacity regulators and compressor module CM-RC-02.
Compressors 4GTE(U) .. 4CTE(U) with 2 CRII capacity regulators and compressor module CM-RC-02.
Compressors 8FTE(U) .. 8CTE(U) with 4 CR capacity regulators and compressor module CM-RC-02.

Positions and dimensions with CM-RC-01

The following illustrations show the positions of the capacity regulators in several compressors for transcritical R744 applications with the compressor module CM-RC-01. The module housing for the CM-RC-02 has been enlarged compared to the CM-RC-01, meaning that compressors with a CM-RC-02 are approx. 12 mm higher than those with a CM-RC-01.

Compressors 4PTEU-6LK .. 4KTEU-10LK with 2 CRII capacity regulators and compressor module CM-RC-01.
Compressors 4PTEU-6LK .. 4KTEU-10LK with 2 CRII capacity regulators and compressor module CM-RC-01.
Compressors 4JTEU-10LK .. 4FTEU-20LK with 2 CRII capacity regulators and compressor module CM-RC-01.
Compressors 4JTEU-10LK .. 4FTEU-20LK with 2 CRII capacity regulators and compressor module CM-RC-01.
Compressors 4FTEU-30LK .. 4CTEU-30LK with 2 CRII capacity regulators and compressor module CM-RC-01.
Compressors 4FTEU-30LK .. 4CTEU-30LK with 2 CRII capacity regulators and compressor module CM-RC-01.
Compressors 6FTEU-35LK .. 6CTEU-50LK with 2 CRII capacity regulators and compressor module CM-RC-01.
Compressors 6FTEU-35LK .. 6CTEU-50LK with 2 CRII capacity regulators and compressor module CM-RC-01.

Connection positions

1

High pressure connection (HP)
Connection for high pressure switch (HP)

1a

Connection for high pressure transmitter (HP)

2

Connection for discharge gas temperature sensor (HP)

3

Low pressure connection (LP)
Connection for low pressure switch (LP)

3a

Connection for low pressure transmitter (LP)

5

Oil fill plug

6

Oil drain

8

Oil return (from oil separator)

9

Connection for oil and gas equalisation (parallel operation)

10

Connection for oil heater

11

Oil pressure connection +

12

Oil pressure connection –

16

Connection for oil monitoring (oil level or oil differential pressure)

22

Pressure relief valve to the atmosphere (discharge gas side)

23

Pressure relief valve to the atmosphere (suction side)

24

Compressor module

26

Sight glass

SL

Suction gas line

DL

Discharge gas line

Dimensions may have tolerances according to EN ISO 13920-B.