Safety Devices For Pressure Limiting (Hp And Lp); Oil Heater; Cic System; Commissioning - Bitzer 2KES-05 Instructions De Service

– Compressors with integrated start unloading:
The sensor must be incorporated in the start un-
loading cylinder head (see figure 22, page 21).
• Connect the instrument leads in series to the motor
temperature sensors (see adhesive label in terminal
box) and see figure 22, page 21).
L
Reset
SE-B*
N
B1
Relais max
2,5A 250 V B2
300 VA
12
14
11
4
3a
4FES-6(Y) .. 4NE(S)-20(Y)
4VDC-10Y .. 4NDC-20Y
Fig. 22: Discharge temperature sensor for start unloading
1 Terminal plate
2 Discharge gas temperature sensor
3 Connection position at the cylinder head
4 Safety chain
KB-104-7
1
M2
M1
2
3b
4JE-13Y .. 6FE-50(Y)
5.4.6

Safety devices for pressure limiting (HP and LP)

• These safety devices are required for securing the
compressor's application range in order to avoid un-
acceptable operating conditions.
• Do not connect any safety devices to the service
connection of the shut-off valve!
5.4.7

Oil heater

The oil heater ensures the lubricity of the oil even after
long standstill periods. It prevents increased refrigerant
concentration in the oil and therefore reduction of vis-
cosity.
The oil heater must be operated while the compressor
is at standstill in case of
• outdoor installation of the compressor,
• long shut-off periods,
• high refrigerant charge,
• possible refrigerant condensation in the compressor.
Connection according to Technical Information KT-150.
5.4.8

CIC system

Electronically regulated liquid injection (LI) serves for
ensuring the application limits in low temperature ap-
plications using certain refrigerants such as R407F,
R407A and R22. For the technical description as well
as for mounting and electrical connection information,
see Technical Information KT-130. An improved ver-
sion of the refrigerant injection (RI) is used together
with the compressor module CM-RC-01, see Technical
Information KT-230.

6 Commissioning

The compressor has been carefully dried, checked for
tightness and filled with a holding charge (N
leaving the factory.
DANGER
Risk of explosion!
Never pressurize the compressor with oxygen
(O ) or other industrial gases!
2
) before
2
21