York YLAA Operation Manual page 51

Wiring Diagram (Cont'd)
JOHNSON CONTROLS
A. This drawing is based on IEC symbols.
B. Field wiring to be in accordance with the relevant electrical code as well as all other applicable codes and
specifications
C. All sources of supply shown on this diagram to be taken from one main isolator, not shown or supplied by
the chiller manufacturer .
D. Green and yellow wire is used for earth, multi-coloured cable used for low voltage. Red wire used for AC
control, blue wire for neutral, black wire for AC and DC power. Orange wire should be used for interlock
control wiring supplied by external source.
E. Legend designation depicts component abbreviations. Number prefix located, if applicable, on schematic
circuit, refers to system thereon, e.g.= 1-FHP2 refers to high pressure cutout no 2 on system no 1.
F. All wiring to control section voltage free contacts requires a supply provided by the customer maximum
voltage 240 volts. The customer must t ake particular care when deriving the supplies for the voltage free
terminals with regard to a common point of isolation. Thus, these circuits when used must be fed via the
common point of isolation the voltage to these ci rcuits is removed when the common point of isolation to
the unit is opened. This common point of isolation is not supplied. The voltage free contacts are rated at
100VA. All inductive devices {relays} switch by the voltage free contacts must have their coil suppressed
using standard r/c suppressors.
G. Customer voltage free contacts connected to terminal 13 must be rated at 30v 5ma
H. No controls {relays etc.} Should be mounted in any section of the control panel. Additionally, control wiring
not connected to the control panel should not be run through the panel. If these precautions are not fol-
lowed, electrical noise could cause malfunctions or damage to the unit and its controls.
1. Refer to instalation commisioning operation and maintenance manual for customer connections and cus-
tomer connection notes, non compliance to these instructions will invalidate unit warranty.
2. Wiring and components for compressor 3 only fitted when unit has 3 compressors on the system. 1-BMP3
is replaced by a link across terminals 134 & 135. 2-BMP3 is replaced by a link across terminals 234 & 235.
3. FHP2 is only fitted on 0089 and above. When not fitted 1-FHP2 is replaced by a link across terminals 132
& 139. 2-FHP2 is replaced by a link across terminals 232 & 239
4. Fitted on units with hot gas bypass option.
5. EMS option is wired as shown
6. This wiring must be used for old display 031-0110-000
7. Network connection point
8. Printer port
9. Remote emergency stop can be wired between terminal l and 5 after removing link
10. Power factor correction accessory. Power factor correction fitted to each compressor contactor
11. Not fitted on compressors with internal motor protection. For sytem 1 terminals 132 & 133, 133 & 134 And
134 & 135 are linked. For sytem 2 terminals 232 & 233, 233 & 234 and 234 & 235 are linked.
12. Only fitted on systems with 3 or 4 fans
13. Only fitted on systems with 4 fans
14. Only fitted on systems with 5 fans
15. Only fitted on systems with 6 fans
16. Input switch disconnect or circuit breaker option replaces input terminal block
17. Input switch disconnect & system circuit breaker option replaces input terminal block
18. 115V control circiut requires a 115V supply unl ess control circuit transformer-T2 & -F3 are fitted
19. For optional hydro kit. Heater -EPH is fitted and wired as shown. On sinlge pump -KP1, -QMMSP1 and
-MP1 are fitted & wired as shown. On two pump hydro kits -KP2, -QMMSP2 & -MP2 are also fitted and
wired as shown.
20. Current measurement option wired as shown
21. Only fitted on systems with single speed fans
22. Only fitted on systems with two speed fans
23. Optional compressor manual motors starters.
24. See sheet 3 of connection diagram for power input options
FORM 150.72-EG6 (516)
51