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YORK MILLENIUM TWO-STAGE ABSORPTION CHILLERS WIRING DIAGRAMS
LD12775
CONTRACTOR _______________________
PURCHASER ____________________________________________
ORDER NO. _________________________
JOB NAME ______________________________________________
YORK CONTRACT NO. _________________
LOCATION _____________________________________________
YORK ORDER NO. ____________________
ENGINEER ______________________________________________

REFERENCE
DATE ________
APPROVAL
DATE
________
CONSTRUCTION
DATE

________
YORK MILLENIUM
TWO-STAGE
ABSORPTION CHILLERS
Supersedes: 155.19-W1 (197)
Form: 155.19-W1 (407)
MODELS:
STEAM FIRED
YPC-ST-14SC
&
YPC-ST-16SL
Thru
YPC-ST-19S JOHNSON CONTROLS
2
FORM 155.19-W1 (407)
LEGEND
1M
3 PHASE SOLUTION PUMP STARTER (MOUNTED IN POWER PANEL)
2M
3 PHASE REFRIGERANT PUMP MOTOR STARTER (MOUNTED IN POWER PANEL)
3M
3 PHASE PURGE PUMP MOTOR STARTER (MOUNTED IN POWER PANEL)
4M
FIRST SPRAY SOLUTION PUMP MOTOR STARTER (MOUNTED IN POWER PANEL
-16SL THRU - 19S ONLY)
1R
STEAM SHUTOFF SOLENOID VALVE CONTROL RELAY
2R
FIRST STAGE GENERATOR HIGH TEMPERATURE CUT-OUT RELAY
1SOL
PURGE TANK SOLENOID VALVE - AUTO-PURGE OPTION
2SOL
PURGE PUMP SOLENOID VALVE - AUTO PURGE OPTION
4SOL
STEAM SHUTOFF SOLENOID VALVE (BY OTHERS)
5SOL
STEAM CONDENSATE DRAIN SOLENOID VALVE
ISS
DPDT 3 POSITION ROCKER SWITCH
IT
CLASS 2 POWER SUPPLY TRANSFORMER
CHFLS
CHILLER WATER FLOW SWITCH CUT-OUT (BY - YORK / WIRING BY OTHERS)
FU
FUSE
HP1
FIRST STAGE GENERATOR HIGH PRESSURE CUT-OUT SWITCH
HT1
FIRST STAGE GENERATOR HIGH TEMP. CUT-OUT SWITCH WITH (NON-TRIP)
INDICATOR AND MANUAL RESET
HWT
HOT WATER TEMP. CUT-OUT (HEATER MODE ONLY) (PROVIDED BY RT2)
LRT
LOW REFRIGERANT TEMPERATURE CUT-OUT SWITCH
LWT
LOW WATER TEMPERATURE CUT-OUT (CHIILER CHILLER/HEATER MODES ONLY)
(PROVIDED BY RT1)
MOV
METAL OXIDE VARISTOR
OL
MOTOR OVERLOAD
PT1, PT3-PT4
PRESSURE TRANSDUCER
R1-RT12
RESISTANCE TEMPERATURE SENSING ELEMENT
SUPR
TRANSIENT SUPPRESSOR
TB1, TB3, TB6
TERMINAL BLOCK - FACTORY WIRING -
TB2, TB4, TB5
TERMINAL BLOCK - FIELD CONNECTION -
FIELD WIRING
FACTORY WIRING
CIRCUIT BOARD OR ENCLOSURE BOUNDARY
JACK (J1, J2,...)
PLUG (P1, P2,...)
WIRE ENTRANCE HOLE IN CONTROL PANEL
OPTION (WHEN SUPPLIED) BY YORK
MECHANICAL LINKAGE
SHIELDED CABLE
METAL OXIDE VARISTOR FORM 155.19-W1 (407)
3
JOHNSON CONTROLS
NOTES

1. This wiring diagram describes the standard electronic control scheme. Refer to the Power Panel Wiring Diagram
(located in the Power Panel Enclosure) for additional information for details of standard modi cations. Refer to
product form 155.17PA1.

2. Field Wiring to be in accordance with the National Electrical Code as well as all other applicable codes and speci-
cations.
3. Numbers along the left side of the diagram are line identi cation numbers. The numbers along the right side
indicate the line number location of the relay contacts. An underlined contact location signi es a normally closed
contact.
4. Main Control Panel Class 1 eld wiring terminal connection points are indicated by numbers within a rectangle,
I.E. 15 . Main control panel factory wiring terminal connection points are indicated by numbers within a triangle,
I.E.
2
. Terminals in burner control panel are indicated by number within a hexagon, I.E. 4 . Component ter-
minal markings are indicated by numbers within a circle, I.E. CI . Numbers adjacent to circuit lines are the circuit
identi cation numbers.
5. To cycle unit ON and OFF automatically with contacts other than those shown, install a cycling devise between
terminals 1 & 13 (line 6)(See note 7) if a cycling device is installed, jumper must be removed between terminals
1 & 13 .
6. To stop unit and not permit it to start again, install a stop device between terminals 1 & 8 (Line 54)(See note
7). A remote start-stop switch may be connected to terminals 1 , 7 , & 8 (lines 53 & 54)(See note 7). A remote
start-stop switches (lines 53 & 54) are operative in only the "Remote" operating mode.
7. Device contact rating to be 5 milliamperes at 115 volts A.C.
8. Contact Rating is 5 Amps resistive at 120 Volts A.C. or 240 Volts A.C.
9. Orientation of ow switches indicate "Power Off" state.
10. The factory supplied jumper between terminals 4 & 53 (line 25) must be removed when an auxiliary safety device
is used.
11. Contact rating is 5 Amps resistive +/- 250 volts A.C. & 30 volts D.C. @ AMP inductive (.4 PF) +/- 250 Volts A.C.
& 30 Volts D.C..
12. Each 115 VAC eld-connected inductive load: I.E. relay coil, motor starter coil, etc. shall have a transient sup-
pressor wired in parallel with it's coil physically located at the coil spare transient suppressors and control circuit
fuse are supplied in a bag attached to the fuse holder.
13. Maximum allowable current draw is 1 AMP holding. 10 AMPS inrush for 115 VAC Field-supplied steam shutoff
valve (line 100). JOHNSON CONTROLS
4
FORM 155.19-W1 (407)
YPC CONTROL CENTER
ELEMENTARY DIAGRAM
LD12777
FIG. 1 ELEMENTARY DIAGRAM
}
FIELD
CONNECTIONS FORM 155.19-W1 (407)
5
JOHNSON CONTROLS
LD12778
FIG. 1 (CON'T) ELEMENTARY DIAGRAM
YPC CONTROL CENTER
ELEMENTARY DIAGRAM
FIG. 2 TIMING DIAGRAM
"SYSTEM RUN"
"START SEQUENCE INITIATED"
"SYSTEM READY TO START-DILUTION"
"SYSTEM READY TO START"
0
START
TIME IN S ECONDS (MINUTES) FOR TYPICAL OPERATION
TIMING DIAGRAM
MICRO PANEL
DISPLAY ME SSAGE
600 -1800
(10-30)
30-90
(0.5-1.5)
LD00802 JOHNSON CONTROLS
6
FORM 155.19-W1 (407)
ELEMENTARY DIAGRAM (CE)
LD12779
FIG. 3 ELEMENTARY DIAGRAM (CE) FORM 155.19-W1 (407)
7
JOHNSON CONTROLS
LD12780
FIG. 3 (CON'T) ELEMENTARY DIAGRAM (CE)
YPC CONTROL CENTER
ELEMENTARY DIAGRAM (CE) JOHNSON CONTROLS
8
FORM 155.19-W1 (407)
LD12781
FIG. 4 MICROBOARD DIAGRAM
YPC CONTROL CENTER
MICROBOARD DIAGRAM FORM 155.19-W1 (407)
9
JOHNSON CONTROLS
LD12782
FIG. 4 (CON'T) MICROBOARD DIAGRAM
YPC CONTROL CENTER
MICROBOARD DIAGRAM (CON'T) JOHNSON CONTROLS
10
FORM 155.19-W1 (407)
LD12783
FIG. 5 I/O BOARD DIAGRAM
I/O BOARD DIAGRAM FORM 155.19-W1 (407)
11
JOHNSON CONTROLS
POWER SUPPLY BOARD DIAGRAM
KEYPAD DIAGRAM
FIG. 7 KEYPAD DIAGRAM
LD12749
FIG. 6 POWER SUPPLY BOARD DIAGRAM
LD12784 JOHNSON CONTROLS
12
FORM 155.19-W1 (407)
LD00794a
FIG. 8 POWER PANEL DIAGRAM
POWER PANEL ELEMENTARY DIAGRAM
MODEL YPC-ST-14SC FORM 155.19-W1 (407)
13
JOHNSON CONTROLS
LD00795a
FIG. 9 POWER PANEL DIAGRAM
POWER PANEL ELEMENTARY DIAGRAM
MODEL YPC-ST-16SL-19S JOHNSON CONTROLS
14
FORM 155.19-W1 (407)
POWER PANEL CONNECTION DIAGRAM
MODELS YPC-ST-14SC
LD12785
FIG. 10 POWER PANEL CONNECTION DIAGRAM FORM 155.19-W1 (407)
15
JOHNSON CONTROLS
POWER PANEL CONNECTION DIAGRAM
MODELS YPC-ST-16L THRU -19S
FIG. 11 POWER PANEL CONNECTION DIAGRAM
LD12786 JOHNSON CONTROLS
16
FORM 155.19-W1 (407)
LD12787
FIG. 12 CONNECTION DIAGRAM
YPC CONTROL CENTER
CONNECTION DIAGRAM - STANDARD FORM 155.19-W1 (407)
17
JOHNSON CONTROLS
LD12788
FIG. 12 (CON'T) CONNECTION DIAGRAM
YPC CONTROL CENTER
CONNECTION DIAGRAM - STANDARD (CON'T) JOHNSON CONTROLS
18
FORM 155.19-W1 (407)
LD12789
FIG. 13 CONNECTION DIAGRAM (CE)
YPC CONTROL CENTER
CONNECTION DIAGRAM (CE) FORM 155.19-W1 (407)
19
JOHNSON CONTROLS
LD12790
FIG. 13 (CON'T) CONNECTION DIAGRAM (CE)
YPC CONTROL CENTER
CONNECTION DIAGRAM (CE) (CON'T) JOHNSON CONTROLS
20
FORM 155.19-W1 (407)
LD12791
FIG. 14 CONNECTION DIAGRAM
YPC CONTROL CENTER
CONNECTION DIAGRAM FORM 155.19-W1 (407)
21
JOHNSON CONTROLS
LD12792
FIG. 14 (CON'T) CONNECTION DIAGRAM
YPC CONTROL CENTER
CONNECTION DIAGRAM (CON'T) JOHNSON CONTROLS
22
FORM 155.19-W1 (407)
LD12773
FIG. 15 CONNECTION DIAGRAM (CE)
YPC CONTROL CENTER
CONNECTION DIAGRAM (CE) FORM 155.19-W1 (407)
23
JOHNSON CONTROLS
LD12774
FIG. 15 (CON'T) CONNECTION DIAGRAM (CE)
YPC CONTROL CENTER
CONNECTION DIAGRAM (CE) (CON'T) JOHNSON CONTROLS
24
FORM 155.19-W1 (407)
STEAM VALVE ACTUATORS
FIG. 14 STEAM VALVE ACTUATORS
LD12796 FORM 155.19-W1 (407)
25
JOHNSON CONTROLS
LD12795
FIG. 15 PRESSURE TEMPERATURE CHART
STEAM PRESSURE - TEMPERATURE CHART JOHNSON CONTROLS
26
FORM 155.19-W1 (407)
NOTES FORM 155.19-W1 (407)
27
JOHNSON CONTROLS
NOTES (717) 771-7890
www.york.com
P.O. Box 1592, York, Pennsylvania USA 17405-1592
Subject to change without