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Emerson Copeland Scroll YHV 2P Series Application Manuallines page 23

Variable speed compressors

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For the single-phase matched pairs of YHV*2P with ED3 drive, the following circuit diagrams
can be used:
Power circuit
Legend
B1 ....... System controller
Q1 ....... Main switch
D ......... Drive assembly
F1, F6 . Fuses
F3 ....... HP limiter
Figure 20: Wiring diagram for YHV*2P with single-phase drive
For the three-phase matched pairs of YHV*2P with ED3 drive, the following circuit diagrams
can be used:
Power circuit
Legend
B1 ................. System controller
Q1 ................. Main switch
D ................... Drive assembly
F1, F6/7/8 ..... Fuses
F3 ....... .........HP limiter
Figure 21: Wiring diagram for YHV*2P with three-phase drive
* Additional contactor (K2) needed only on drives without STO (Safe torque off) safety input!
20
Control circuit
F4 ........ LP switch
K2 ........ Contactor (optional)*
RCD .... Residual current device type B or B+
S1 ........ Auxiliary switch
Grey = optional, depending on the system type
Control circuit
F4 ........ LP switch
K2 ........ Contactor (optional)*
RCD .... Residual current device type B or B+
S1 ........ Auxiliary switch
Grey = optional, depending on the system type
AGL_HP_VS_YHV2P_E_Rev0

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