Electrical Connection; Mains Connections; Motor Versions - Bitzer CSH6553-35Y Instructions De Service

Connection positions
1 High-pressure connection (HP)
1a Additional high-pressure connection (HP)
3 Low-pressure connection (LP)
4 Oil sight glass
5 Oil service valve (standard) / Connection
for oil equalisation (parallel operation)
6 Oil drain plug (motor body)
7 Connection for electro-mechanical oil level
switch when replacing CSH.1 with CSH.3:
only CSH, but not CSH6583, CSH6593,
CSH95103 and CSH95113
8 Connection for opto-electronic oil level
switch (OLC-D1-S). CSVH: integrated in FI
control
9 Oil heater with heater sleeve (standard)
CSVH: integrated in FI control
10 Oil pressure connection
11 Connections for external oil cooler (op-
tional adapter)
11a Outlet to the oil cooler
11b Inlet / return from the oil cooler
12 Oil temperature sensor (PTC) CSVH: in-
tegrated in FI control
13 Connection for economiser (ECO) (op-
tional shut-off valve, CSH: with pulsation
muffler)
14 Threaded bore for CS. pipe fixture: Pipe for
ECO or LI
14a CSVH: Pipe for ECO or LI
14b Pipe for FI cooling
15 Connection for liquid injection (LI) (CSH:
optional shut-off valve)
16 Earth screw for housing
17 Connection for oil and gas return (for sys-
tems with flooded evaporator, optional ad-
apter)
18 Oil filter (service connection)
19 FI cooling (liquid refrigerant)
20 Frequency inverter (FI)
21 Oil injection valve (internal)
SL Suction gas line
DL Discharge gas line
Tab. 6: Connection positions
Dimensions (if specified) may have tolerances accord-
ing to EN ISO 13920-B.
SB-170-7
The legend applies to all open and semi-hermetic
BITZER screw compressors and includes connection
positions which are not used for all compressor models.

5 Electrical connection

General information
Compressors and electrical equipment comply with the
EU Low Voltage Directives 2006/95/EC and 2014/35/
EU.
Connect mains cables, protective earth conductors and
bridges (if needed) as specified on the labels in the ter-
minal box. Observe the safety standards EN 60204,
IEC 60364 and national safety regulations.
NOTICE
!
!
Risk of short-circuit due to condensation water
in the terminal box!
Use only standardised cable bushings.
When mounting, pay attention to proper sealing.
DANGER
High electrostatic discharge voltage possible.
Risk of electric shock!
Also earth the compressor housing!

5.1 Mains connections

When dimensioning motor contactors, feed lines and
fuses:
• Use the maximum operating current or maximum
power consumption of the motor as a basis.
• Select the contacts according to the operational cat-
egory AC3.
• Set the thermal overload relays to the maximum op-
erating current of the compressor.

5.2 Motor versions

NOTICE
!
!
Risk of compressor failure!
Operate the compressor only in the intended ro-
tation direction!
The compressor series CS.65, CS.75 and CS.85 are
equipped by default with part-winding motors ("PW") in
Δ/ΔΔ-wiring. Star-delta motors (Y/Δ) are also available
43