Start Unloading (Su) And Capacity Control (Crii) - Bitzer 2KES-05 Instructions De Service

Depending on the compressor versions, they are sup-
plied with blanking plates on the pipe connections or
shut-off valves. These plates must be removed before
commissioning.
NOTICE
!
!
For systems with rather long pipelines or for
brazing operations without protective gas:
Install the suction-side cleaning filter (mesh size
< 25 μm).
NOTICE
!
!
Risk of compressor damage!
Generously sized filter dryers should be used to
ensure a high degree of dehydration and to
maintain the chemical stability of the circuit.
Make sure to choose a suitable quality (molecu-
lar sieves with specially adapted pore sizes).
Start unloading (SU)
4VE(S)-6Y .. 4NE(S)-20(Y)
4VDC-10Y .. 4NDC-20Y
Capacity control (CRII)
CR LP
HP
2EES-2(Y) .. 2CES-4(Y)
4FES-3(Y) .. 4BES-9(Y)
4FDC-5Y .. 4CDC-9Y
Fig. 3: Cylinder heads for start unloading (SU) and capacity control (CRII)
Activation of the start unloading and capacity control
functions can be performed advantageously by the
compressor module CM-RC-01, see Technical Informa-
tion KT-230 and brochure KP-104.
10
LP
SU HP
LP
CR HP
4VE(S)-6Y .. 4NE(S)-20(Y)
4VDC-10Y .. 4NDC-20Y

4.4 Start unloading (SU) and Capacity control (CRII)

For protection against transport damage, the valve top
parts will be delivered as accessories kit. Prior to evac-
uation, they must be mounted. To do so, replace the
blind flange with the top part.
WARNING
The compressor is under pressure!
Serious injuries are possible.
Depressurize the compressor!
Wear safety goggles!
To avoid mix-ups, the cylinder head and valve flange
are labelled with SU and CR, respectively. An align-
ment pin in the flange surface only allows correct posi-
tioning (see figure 3, page 10).
4JE-13Y .. 6FE-50(Y)
4JE-13Y .. 6FE-50(Y)
LP
CR
HP
8GE-50(Y) .. 8FE-70(Y)
KB-104-7