SB-170-1068
Connection positions
1 High pressure connection (HP)
Connection for high pressure switch (HP)
2 Additional high pressure connection (HP)
2a Connection for high pressure transmitter
(HP)
CS.105: connected to the compressor
module
3 Low pressure connection (LP)
Connection for low pressure switch (LP)
3a Connection for low pressure transmitter
(LP)
CS.105: connected to the compressor
module
4 Oil sight glass
5 Oil valve for maintenance (standard) / con-
nection for oil equalisation (parallel opera-
tion)
6 Oil drain plug (motor body)
7 Connection for electro-mechanical oil level
switch for the replacement of CSH.1 with
CSH.3
8 Connection for opto-electronic oil level
switch (OLC-D1-S)
CS.105: connected to the compressor
module
9 Oil heater with heater sleeve (standard)
CS.105: connected to the compressor
module
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
CS.105: connected to the compressor
module
13 Connection for economiser (ECO, optional
shut-off valve, CSH65 and CSH75 with
pulsation muffler)
14 Threaded bore for pipe fixture for ECO or
LI line
15 Connection for liquid injection (LI, 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 (maintenance connection)
21 Oil injection valve (internal)
Connection positions
22 Compressor module
23 Slider position indicator
SL Suction gas line
DL Discharge gas line
Tab.8: Connection positions
Dimensions (if specified) may have tolerances accord-
ing to ENISO13920-B.
The legend applies to all BITZER CS. compressors and
includes connection positions that do not exist in every
compressor series.
6 Electrical connection
According to the EU Machinery Directive 2006/42/EC
Annex I the safety objectives set out in EU Low Voltage
Directive 2014/35/EU shall apply to the compressors
and their electrical equipment. For any work on system
electrics: Observe EN60204-1, the safety standard
series IEC60364 and national safety regulations.
WARNING
Risk of electric shock!
Before performing any work in the terminal box
of the compressor: Switch off the main switch
and secure it against being switched on again!
Close the terminal box of the compressor before
switching on again!
6.1 Checklist
This checklist summarises the work steps for the elec-
trical connection of compressors. See the following
subchapter for details.
▶ Connect the compressor only if the nominal supply
voltage matches the name plate data.
▶ Observe the adhesive label in the terminal box
cover.
▶ Use flexible cables.
▶ Use suitable wire end ferrules, notch-type cable lugs,
compression cable lugs, tubular or crimping cable
lugs.
▶ Connect the protective earth conductor.
▶ Integrate the compressor protection device into the
safety chain.
▶ Also integrate the high pressure and low pressure
switch into the safety chain.
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