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3.4
Electrical connections
3.4.1 Power supply connections
The electrical connection of the HLR Digital Receiver unit to the power supply must be made by
qualified technicians; the electrical diagrams are located inside the electrical connection box.
Figure 9: Electrical connection box
3.4.2 Pre-wired electrical components
Electrical connections should be made with great care to avoid reverse rotation.
Pre-wired electrical
components
Compressor contactor
Overload protector
Fuses
Electronic controller
Crankcase heater
HP/LP Pressure switch PS2
HP Pressure switch PS3
LP Pressure switch PS1
Digital 24V solenoid valve
Table 7: Electrical connections – Single compressor units
Pre-wired electrical
components
Compressor contactor
Overload protector
Fuses
Electronic controller
Crankcase heater
HP/LP Pressure switch PS2
HP Pressure switch PS3
LP Pressure switch PS1
Digital 24V solenoid valve
Table 8: Electrical connections – Tandem-compressor units
C6.1.7/1110-0519/E
Auxiliary relay K10
Contactor K1
Transformer T1
Circuit breaker
Fuses F1, F2
HLR13-ZBD30KCE HLR13-ZBD45KCE HLR13-ZBD58KCE HLR13-ZBD76KCE
18 A
6 to 10 A
2
EC2-552
1
1
–
–
1
HLR13-ZBDT60KCE
HLR13-ZBDT90KCE
2 x 25 A
2 x (9 to 14 A)
2 x (9 to 14 A)
2
EC2-552
2
–
2
1
1
Single compressor units
18 A
25 A
9 to 14 A
13 to 18 A
2
2
EC2-552
EC2-552
1
1
1
1
–
–
–
–
1
1
Tandem-compressor units
HLR31-ZBDT116KCE HLR31-ZBDT152KCE
2 x 25 A
2 x 25 A
2x (13 to 18 A)
2
2
EC2-552
EC2-552
2
2
–
–
2
2
1
1
1
1
25 A
17 to 23 A
2
EC2-552
1
1
–
–
1
2 x 25 A
2x (17 to 23 A)
2
EC2-552
2
–
2
1
1
13
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