Bitzer CSV.2 User Manual

SW-100-8 7
6 Special screwed connections inside the
compressor
Assess the risk of conversion and take appropriate
measures before any intervention into the compressor.
Before re-commissioning: Test the compressor de-
pending on the risk assessed for pressure strength and
tightness or for tightness only.
6.1 Pressure relief valve
Size
3/4-14 NPTF 15 .. 20 Nm
This valve vents from the pressure side (HP) to the
suction side (LP) inside the compressor if the HP pres-
sure exceeds the maximum allowable pressure.
6.2 SPI sensor
60 Nm, thread at sensor body. Mount with aluminium
gasket.
The SPI (slider position indicator) is mounted at com-
pressors starting at sizes HS.95, OS.95 and CS.105.
6.3 Connecting flange of FI cooling plate with
CSV.
Size
M6 16 Nm
This tightening torque is only valid for a cooling plate,
that is fixed with three screws.
6.4 Set screws at shaft seals
Size
M5 3 .. 5 Nm
M6 5 .. 9 Nm
M8 10 Nm
6.5 Locking screws of grooved nuts on shafts
The locking screws are set screws or cheese-head
screws depending on compressor design.
Size
M4 3.5 Nm
M6 3 .. 5 Nm
M8 5 .. 9 Nm
6.6 Fixing of electrical motor
The rotor of the electrical motor is fixed to the male ro-
tor shaft.
Central screw at shaft end
Size
M10 15 .. 20 Nm
M16 15 .. 20 Nm ①
①: Use only screws with Loctite or Precote85 coating.
Grooved nuts at the shaft
Size
M40 x 1,5 15 Nm
M50 x 1,5 15 Nm
6.7 Capacity control
Thread at piston rod
Size
M12 40 Nm
M16 100 Nm
M20 150 Nm
M25 220 Nm
Coat thread with Loctite 648 and tighten with calibrated
torque spanner to indicated torque.
Fixing at piston or piston rod
Size
M10 40 Nm
M16 100 Nm ①
M16 150 Nm
Tighten with calibrated torque spanner to indicated
torque.
①: only for CS.7551, CS.7561 and CS.7571.

Bitzer CSV.2 Specifications

General

Frequency	50/60 Hz
Refrigerant	R134a
Cooling Capacity	Varies by model
Piston Displacement	N/A (Screw Compressor)
Sound Power Level	Varies by model
Weight	Varies by model
Motor protection	Integrated motor protection
Oil pump	Integrated oil pump

Summary

Mind when mounting or replacing

Before mounting

Steps for preparing components before installation, including cleaning threads and using new gaskets.

Admissible screwing methods

Describes allowed methods for tightening screws, including torque spanner and pneumatic wrench usage.

Flange connections

Guidance on tightening flange connections crosswise in multiple steps.

Screwed connections

Metric screws

Torque values for metric screws used in screwed connections.

Metric screws of shut-off valves and counter flanges

Torque specifications for metric screws on shut-off valves and counter flanges.

Plugs without gasket

Tightening torques for various threaded plugs without gaskets.

Screwed connections with aluminium gasket

Torque values for screwed connections using aluminium gaskets, including screws, plugs, and nipples.

Sight glasses

Sight glasses with sealing flange

Tightening torques for sight glasses fitted with a sealing flange.

Sight glasses with union nut

Torque specifications for sight glasses attached with a union nut.

Electrical contacts

FI current bars at CSV

Instructions for tightening screwed connections on terminal plates for FI current bars.

Solenoid valves

Fixing nuts of solenoid coil

Torque values for securing the nuts of solenoid coils.

Special screwed connections inside the compressor

6.1 Pressure relief valve

Tightening torque for the pressure relief valve (3/4-14 NPTF).

6.2 SPI sensor

Torque specification for the SPI sensor thread (60 Nm) and mounting advice.

6.3 Connecting flange of FI cooling plate with CSV

Torque for connecting flange of FI cooling plate with CSV, applicable for three-screw fixing.

6.4 Set screws at shaft seals

Tightening torques for set screws used in shaft seals.

6.5 Locking screws of grooved nuts on shafts

Torque values for locking screws on grooved nuts, varying by compressor design.

6.6 Fixing of electrical motor

Torque specifications for fixing the electrical motor rotor to the male rotor shaft.

6.7 Capacity control

Torque for thread at piston rod and fixing at piston or piston rod.