Notes
1. This wiring diagram describes the standard electronic control scheme for use with YORK Solid
State Starter or Variable Speed Drive. For details of standard modifications, refer to Form
160.76-PW4.
2. Field wiring must be in accordance with the National Electrical Code (NEC), as well as all other
applicable codes and specifications. Refer to product Form 160.76-PW1 or 160.76-PW7 for field
wiring connections.
CAUTION
Field wiring contacts may have voltage present when power is removed. Field wiring contacts
could be connected to external power sources.
3. Numbers along the left side of the diagram are line identification numbers. The numbers
along the right side indicate the line number location of the relay contacts. An underlined
contact location signifies a normally closed contact.
4. The main control panel class 1 field wiring terminal connection points are indicated by
numbers within a rectangle. The main control panel factory wiring terminal connection points
are indicated by numbers within a triangle. Components markings are indicated by numbers
within a circle. Numbers adjacent to circuit lines are the circuit identification numbers.
5. To cycle the unit on and off automatically with contacts other than those shown, install a
cycling device between Terminals 1 and 13 (line 38). See Note 7. If a cycling device is installed,
the jumper must be removed between Terminals 1 and 13.
6. A remote run-stop switch may be connected to Terminals 1 and 7 (line 32). See Note 7. The
remote run-stop (line 32) is operative only in the remote operating mode.
7. The device contact rating must be 5 mA at 115 VAC.
8. The contact rating is 5 A resistive at 120 VAC or 240 VAC.
9. For the wiring diagram of LCSSS or LVVSD, refer to product Form 160.76-PW6.
10. A jumper is installed between Terminals 21 and 24 for normal operation. To check motor
rotation on initial start-up, complete the following steps:
a. Remove the jumper and install a momentary switch between Terminals 21 and 24.
b. Press the Start key on the display screen on the control panel.
c. After completion of the prelube sequence, jog the motor with the momentary switch.
d. When proper rotation is obtained, replace the momentary switch with a jumper. The
momentary switch must have a minimum contact rating of 1 FLA, 10 LRA at 115 VAC.
CAUTION
A temporary momentary switch or jumper is the only connection permitted between
Terminals 21 and 24. Connections of any other devices to either Terminals 21 and 24 may
cause inadvertent compressor start-up.
11. Solid state motor overload contact (CM) LCSSS is set up to trip at 105% FLA.
Wiring Diagrams for Model YK (Style H) with OptiView Control Center and SSS with Modbus, VSD with
Modbus
4
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