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Three-phase compressors (TF*) with internal motor protection
For the ZH04K1P to ZH19K1P and ZHI05K1P to ZHI40K1P ranges of compressors t he f ollowing
circuit diagrams can be used:
Power circuit
Motor terminal connections
Legend
B1 ........... System controller
B3 ........... Discharge gas thermostat
F1, F6, F8 Fuses
F3 ........... HP limiter
F4 ........... LP switch
K1, K2 ..... Contactors
Figure 18: Wiring diagrams for three-phase compressors with internal motor protection
18
Control circuit
L1
Three-phase compressors are connected to the
T1, T2 and T3 connections
Q1 ......... Main switch
R2.......... Crankcase heater
S1.......... Auxiliary switch
Y5.......... Solenoid valve for injection (
RCD....... Residual current device
F1
K1
K1
K2
K2
F3
P>
F4
P<
B3
Y5
R2
K2
N
1
2
AGL_HP_ST_ZHK1P_EN_Rev00
S1
B1
B1
K1
3
4
)
if available
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