Electrical components
Electric components and safety
equipment
Pressure switch cooling cycle HP
and LP
There is a high pressure switch
(HP) on the heat gas side within
the cooling cycle to switch off the
unit in the event of a temperature
increase.
A low pressure switch (LP) on the
suction side or in the compressor
switches off the unit if the
refrigerant charge is too low.
Measurement
temperature
C°
Probe resistance
value
NTC
-20
71.67 k
Ω
-15
55.99 k
Ω
-10
44.07 k
Ω
-5
34.92 k
Ω
0
27.86 k
Ω
+5
22.39 k
Ω
+10
18.13 k
Ω
+15
14.77 k
Ω
+20
12.11 k
Ω
+25
10.00 k
Ω
+30
8.29 k
Ω
+35
6.92 k
Ω
+40
5.80 k
Ω
+45
4.89 k
Ω
+50
4.14 k
Ω
+55
3.52 k
Ω
+60
3.01 k
Ω
+65
2.58 k
Ω
+70
2.22 k
Ω
+75
1.92 k
Ω
+80
1.66 k
Ω
+85
1.45 k
Ω
+90
1.26 k
Ω
+95
1.11 k
Ω
+100
0.98 k
Ω
Flow switch FL
The flow monitor measures an
adequately large flow of the me-
dium and switches off the unit if the
minimum flow volume is to low or if
the flow volume is too high.
Thermal contacts
Condenser fans TX1 / TX2
The condenser fan's thermal con-
tacts prevent overheating of the
motors.
Motor overload switch
compressor FL
The protection switch limits the
compressor's operating current.
Temperature controller TS for
heater TR
The controller regulates the heater
to ensure continuous condensate
draining at low ambient tempera-
tures.
Phase sequence relay FCR
(only RVS 100H / RVS 150H)
The phase sequence relay controls
the phase sequence of the power
supply. The relay will not be acti-
vated if the sequence is incorrect.
Fan speed control board A2
To keep noise level to minimum
the fans speed can be regulated by
adjusting the current.
The controller μC2SE calculates the
temperature in the condenser over
the TR 1 tranceducer.
The target value is then adjusted
over the fan speed controll board
A2.
Probe medium intake B 1
The probe is located at the unit’s
medium intake (system return). It
serves to monitor the medium tem-
perature to regulate the target value.
Probe medium output B 2
The probe is located at the unit’s
medium output (system supply).
It serves to monitor the medium
temperature and regulate the anti-
freeze protection temperature.
Probe Condenser B 3
The probe is located at the unit’s
condenser. It serves to monitor the
condenser’s temperature.
Reversing valve cooling cycle EV
The four-wax-reversing valve
makes the switching of the cooling
cycle possible to change from cool-
ing mode to heating mode.
Pressure transducer cooling cycle
TR 1
The trancuducer is located in
the cooling cycle’s heat gas side.
It serves to monitor the current
condenser pressure and regulate
the fan over the central fan speed
control board.
29
Summary of Contents for RVS 100H INOX
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