SB-110-4
47
F7
Oil supply monitoring
F10
Oil filter monitoring
Oil level switch and oil thermostat are delivered separ-
ately. Mounting position see figure 11, page 47.
2 (LP)
1
9
8
7
10
6
2
4
5
3
Fig. 11: Oil circuit (example shows HS.85)
1
Compressor
2
Oil separator
3
Oil heater
4
Oil thermostat
5
Oil level switch
6
Check valve
7
Oil cooler (if re-
quired)
8
Sight glass
9
Maintenance valve
(or Rotalock valve
on the compressor
(accessories))
10
Solenoid valve
(standstill bypass, if
needed)
Oil separator
Install the oil heater in the oil separator and connect it
according to the schematic wiring diagram. During long
shut-off periods, the oil heater prevents excessive refri-
gerant concentration in the oil and the resulting reduc-
tion of viscosity. It must be on when the compressor is
at standstill.
Insulate the oil separator:
• during operation at low ambient temperatures or
• at high temperatures on the high-pressure side dur-
ing standstill (e.g. heat pumps).
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.
5.4.5
Monitoring the oil circuit HS.95
Opto-electronic oil level monitoring OLC-D1-S
The OLC-D1-S is an opto-electronic proximity sensor
for contact-free oil level monitoring with infrared light.
Depending on the mounting position and electrical con-
nection, the same device 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 referred to 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.
External oil management system
Optimized external oil management system consisting
of:
• Oil filter
• Oil solenoid valve
• Opto-electronic oil level monitoring (Opto-electronic
oil level monitoring OLC-D1-S) − connected to the
compressor module.
• Oil pressure transmitter − connected to the com-
pressor module.