KT-210-4 25
Connection points
9 Connection for oil and gas equalisation
(parallel operation)
9a Connection for gas equalisation (parallel
operation)
9b Connection for oil equalisation (parallel op-
eration)
10 Connection for oil heating
11 Oil pressure connection +
12 Oil pressure connection –
13 Cooling water connection
14 Intermediate pressure connection (MP)
15 Refrigerant injection (operation without li-
quid subcooler and with thermostatic ex-
pansion valve)
16 Connection for oil monitoring (opto-elec-
tronic oil monitoring "OLC-K1" or differen-
tial oil pressure switch "Delta-PII")
17 Refrigerant inlet on the subcooler
18 Refrigerant outlet on the subcooler
19 Clamp space
20 Terminal plate
21 Maintenance connection for oil valve
22 Pressure relief valve to the atmosphere
(discharge gas side)
23 Pressure relief valve to the atmosphere
(suction side)
24 Compressor module
SL Suction gas line
Connection points
DL Discharge gas line
Tab.1: Connection points
Dimensions (if specified) may have tolerances accord-
ing to ENISO13920-B.
The legend applies to all open and semi-hermetic
BITZER reciprocating compressors and contains con-
nection positions that are not found in every com-
pressor series.
4 Electrical connection
All connections are located below the FI housing cover
(FI without control board for installation in ECOSTAR
condensing units).
DANGER
Life-threatening voltages inside the FI housing!
Contact can lead to serious injuries or death.
Never open the FI housing in operation!
Switch off the main switch and secure it against
being switched on again.
Wait for at least 5 minutes until all capacitors
have been discharged!
Before switching on again, close the FI housing.
WARNING
Risk of frequency inverter failure.
Before connecting to the voltage supply, make
sure that the operating voltage complies with
the specifications on the name plate!
Operating voltage of the FI, see chapter Tech-
nical data, page 21.
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