Monitoring Of The Oil Circuit; Opto-Electronic Oil Level Monitoring Olc-D1-S; Oil Heater; Technical Data - Bitzer CSH6553-35Y Operating Instructions Manual

6.8 Monitoring of the oil circuit

NOTICE
!
!
Lack of oil leads to a too high increase in tem-
perature.
Risk of damage to the compressor!
• The oil temperature sensor mounted as standard is
sufficient as indirect monitoring
– for small system volume and small refrigerant
charge
– for short circuits without liquid injection (LI) for ad-
ditional cooling
• The oil level must be monitored directly with opto-
electronic oil level monitoring
– for circuits with additional cooling by liquid injec-
tion (LI)
– for great system volumes
– for compressors in parallel compounding
Connections at compressor housing see chapter
Connections and dimensional drawings, page 59, oil
temperature sensor: position 12 and monitoring of
the minimum and maximum oil level positions 8.
6.8.1 Opto-electronic oil level monitoring
OLC-D1-S
The OLC-D1-S is an opto-electronic proximity sensor
that monitors the oil level with infrared light. Depending
on the mounting position and electrical connection, the
same unit can be used for monitoring the minimum and
maximum oil levels.
The monitoring device comprises two parts: a prism
unit and an opto-electronic unit.
• The prism unit – a glass cone is mounted directly
into the compressor housing.
• The opto-electronic unit is designated as OLC-D1. It
is not directly connected to the refrigerating circuit. It
is screwed into the prism unit and integrated in the
system's control logic. No external control device is
required.
Delivery in a pre-setup state
If the prism unit of the OLC-D1-S has been ordered
pre-assembled, the compressor will have already been
tested as a whole in the factory for strength pressure
and tightness. In this case, it will only be necessary to
screw in the opto-electronic unit and to connect it elec-
trically (see Technical Information ST-130). Sub-
sequent tightness testing will not be required in this
case.
74
When retrofitting, both prism and electronic unit must
be mounted. For a detailed mounting description,
please see Technical Information ST-130.

6.9 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.
The oil heater is mounted into the lower part of the
compressor housing. See dimensional drawings, con-
nection position 9. It is located into a housing bore or a
heater sleeve. It can be changed without intervention
into the refrigerant circuit. For the CS.105 models, the
oil heater is completely electrically connected in state of
delivery.
▶ Plug electric connector of the oil heater and screw it.
▶ Preferably switch the voltage supply off and on by an
auxiliary normally closed (NC) contact to the con-
tactor of the 1st part winding or the main contactor
(Y/Δ).
▶ Use a suitable fuse.
6.9.1

Technical data

A
Fig. 17: Oil heater of CS. compressors
Oil heater for series CS.6. and CS.7.
• power consumption: 200 W
available for 230 V, 400 V or 115 V
• The oil heater is mounted into a heater sleeve.
dimensions: A = 50 mm, B = 203 mm, ØC =
18,8 mm
B
SB-170-10