Connector
Description
Compressor capacitor
Compressor capacitor
Power supply
Electrical power supply
E-Heater
Electrical back-up
OFF-PEAK
Off-peak rate signal
N
Neutral
L
Live
Earth
CT1
Current transformer
CT2
Differential current transformer
4–WAY VALVE
4-way valve
COM1
Control panel bus
LOW SPEED
Low fan speed
HIGH SPEED
High fan speed
RT5L
Domestic hot water tank temperature sensor
RT3
Exchanger temperature sensor
RT4
Outside air temperature sensor
RTh
Air suction temperature sensor
RTp
Air discharge temperature sensor
A - B - E – P - Q
OFF-PEAK terminal block connectors
PRO_P
High-pressure pressure switch
Compressor outside overload
protection
Compressor outside overload protection
S1
Selector
SW1
Switch
Tab.5
Switches
Switch
OFF
ON
S1 - 1
-
-
S1 - 2
Anti-legionella mode disabled
Anti-legionella mode enabled
S1 - 3
Temperature in anti-legionella mode 65°C
Temperature in anti-legionella mode 70°C
Tab.6
Colour code
Colour
Description
Colour
Description
Colour
Description
Colour
Description
Black
Black
Brown
Brown
Orange
Orange
White
White
Blue
Blue
Grey
Grey
Red
Red
Yellow/
Green
Yellow/Green
3.4.3
Sensor specifications
Tab.7
Temperature sensors: exchanger – outside air – suction
Temperature (°C)
-20
0
20
40
60
80
100
120
Resistance (KOhm)
115
35.2
12.6
5.18
2.36
1.17
0.63
0.36
Tab.8
Domestic hot water tank temperature sensor
Temperature (°C)
-20
0
20
40
60
80
100
120
Resistance (KOhm)
526
167
61.9
26.1
12.2
6.20
3.39
1.97
3 Technical specifications
22
SPC Split
7740321 - v04 - 03122019