Johnson Controls YZ Quick start guide

Unit Wiring and Field Connections for YZ
Centrifugal Chiller with Magnetic Bearing
Controller
Wiring diagram
Contractor
Order number
JCI contract number
JCI order number
Purchaser
Job name
Location
Engineer
Reference Date:
Approval Date:
Construction Date:
Job data
Chiller model number YZ
Number of units
System
Motor
Variable speed drive (VSD)
Evaporator
Condenser
Stage end
Form Number: 161.01-PW4 (220) Supersedes: 161.01-PW4 (1119)
Issue Date: 2020-02-28

General safety guidelines
Important: Read before proceeding.
This equipment is a relatively complicated apparatus. During rigging, installation, operation,
maintenance, or service, individuals may be exposed to certain components or conditions including,
but not limited to: heavy objects, refrigerants, materials under pressure, rotating components, and
both high and low voltage. Each of these items has the potential, if misused or handled improperly,
to cause bodily injury or death. It is the obligation and responsibility of rigging, installation, and
operating/service personnel to identify and recognize these inherent hazards, protect themselves,
and proceed safely in completing their tasks. Failure to comply with any of these requirements
could result in serious damage to the equipment and the property in which it is situated, as well as
severe personal injury or death to themselves and people at the site.
This document is intended for use by owner-authorized rigging, installation, and operating/service
personnel. It is expected that these individuals possess independent training that will enable them
to perform their assigned tasks properly and safely. It is essential that, prior to performing any
task on this equipment, this individual shall have read and understood the on-product labels, this
document and any referenced materials. This individual shall also be familiar with and comply
with all applicable industry and governmental standards and regulations pertaining to the task in
question.
Safety symbols
The following symbols are used in this document to alert the reader to specific situations:
DANGER
Indicates a possible hazardous situation which will result in death or serious injury if proper care is not
taken.
WARNING
Indicates a potentially hazardous situation which will result in possible injuries or damage to equipment
if proper care is not taken.
CAUTION
Identifies a hazard which could lead to damage to the machine, damage to other equipment and/or
environmental pollution if proper care is not taken or instructions and are not followed.
Note: Highlights additional information useful to the technician in completing the work being
performed properly.
Unit Wiring and Field Connections for YZ Centrifugal Chiller with Magnetic Bearing Controller2

WARNING
External wiring, unless specified as an optional connection in the manufacturer’s product line, is not
to be connected inside the control cabinet. Devices such as relays, switches, transducers and controls
and any external wiring must not be installed inside the micro panel. All wiring must be in accordance
with Johnson Controls’ published specifications and must be performed only by a qualified electrician.
Johnson Controls will NOT be responsible for damage/problems resulting from improper connections
to the controls or application of improper control signals. Failure to follow this warning will void the
manufacturer’s warranty and cause serious damage to property or personal injury.
Changeability of this document
In complying with Johnson Controls’ policy for continuous product improvement, the information
contained in this document is subject to change without notice. Johnson Controls makes
no commitment to update or provide current information automatically to the manual or
product owner. Updated manuals, if applicable, can be obtained by contacting the nearest
Johnson Controls Service office or accessing the Johnson Controls QuickLIT website at http://
cgproducts.johnsoncontrols.com.
It is the responsibility of rigging, lifting, and operating/service personnel to verify the applicability
of these documents to the equipment. If there is any question regarding the applicability of these
documents, rigging, lifting, and operating/service personnel should verify whether the equipment
has been modified and if current literature is available from the owner of the equipment prior to
performing any work on the chiller.
Revision notes
Revisions made to this document are indicated in the following table. These revisions are to
technical information, and any other changes in spelling, grammar, or formatting are not included.
Affected pages Description
13 Option removed from HGBP actuator
74 Option removed from OptiView hot gas bypass
MSDS information
Material Safety Data Sheets (MSDS) information can be obtained by calling [phone] in
the U.S. or by e-mailing [email protected]. Provide the product name, manufacturer, part
number, and the specific language required. JCI employees can refer to the following for more
information: https://my.jci.com/sites/BE/NASafety/safety-homepage.
3Unit Wiring and Field Connections for YZ Centrifugal Chiller with Magnetic Bearing Controller

Associated literature
Manual description Form number
YZ Unit Operations and Maintenance Manual 161.01-OM1
YZ Installation and Reassembly Manual 161.01-N1
YZ Installation Checklist and Request for Startup 161.01-CL1
YZ Startup Checklist 161.01-CL2
YZ Field Connections 161.01-PW1
YZ Field Control, Wiring and MBC Modifications 161.01-PW2
YZ VSD Wiring Diagrams 161.01-PW3
Centrifugal Chiller Long Term Storage 50.20-NM5
Unit Wiring and Field Connections for YZ Centrifugal Chiller with Magnetic Bearing Controller4

Nomenclature
Compressor Family
Diffuser Type
Compressor Size Code
Compressor Cycle
A N 030 N A - A A
Motor Configuration
Bearing Configuration
Bearing Family
Motor Family
Motor H P Code
M A 033 A A
Product Family
Stage End Name
Motor End Name
Special Contract
VSD Name
Unit Mod Level
YZ - MA033 AN030 P042N A -
Impeller Configuration
Flowpath Configuration
Mechanical Configuration
MOTOR END NAMING
STAGE END NAMING
SYSTEM NOMENCLATURE
VSD Family
cUL / cETL
VSD Output Amp Code
PYT 0330 G X N01 Z C 30 B 02 M L Z - 46 A
VARIABLE SPEED DRIVE NOMENCLATURE
Optional Filter
Z = Base Model
H = Filter Model
Design Center
Mounting System
Enclosure Type
0330 = 330 A
0420 = 420 A
0780 = 780 A
1020 = 1020 A
1280 = 1280 A
G = Global
X = Unit
N01 = NEMA 1
M = Magnetic
L = Oil
LD27334a
Chiller Type
Z = YZ
Cooling System
C = Condenser Liquid
W = Water
Heat Exchanger Rating
30 = 300 psig
Input Type
B = Circuit Breaker
Circuit Breaker Rating
02 = 250 A
04 = 400 A
06 = 600 A
08 = 800 A
12 = 1200 A
Bearing Type
Input Voltage / Frequency Codes
40 = 380 V / 60 Hz
50 = 380 V / 50 Hz
42 = 400 V / 60 Hz
43 = 400 V / 50 Hz
68 = 415 V / 50 Hz
46 = 460 V / 60 Hz
Mod Level
5Unit Wiring and Field Connections for YZ Centrifugal Chiller with Magnetic Bearing Controller

Cond Length (Feet)
LD26925
EVAPORATOR NAMING
Evap Hinges
Evap Water Inlet Side
Evap Water Connection Type
Cond Tube Type
Cond Bundle Fill
Cond Pass Limit
LR = Inlet Left, Outlet Right
LL = Inlet Left, Outlet Left
RL = Inlet Right, Outlet Left
RR = Inlet Right, Outlet Right
F = Flanges
G = Grooved
A = AGS Victaulic
B = Both Waterboxes
N = No Hinges
2, 3 Pass
Cond Hinges
Cond Nozzle Arrangment
Cond Water Connection Type
B = Both Waterboxes
N = No Hinges
F = Flanges
G = Grooved
A = AGS Victaulic
Evap Tube Type
Evap Bundle Fill
Evap Pass Limit
2, 3 Pass
Evap Family
Evap Diameter (Inches)
Evap Mod Level
Evap Length (Feet)
Evap Bundle Code
Evap Number of Passes
Evap Waterbox Mod Level
Evap Waterbox Family
Evap Waterside DWP
Cond Family
Cond Diameter (Inches)
Cond Mod Level
Cond Bundle Code
A = 3/4 in. Tubes 1 = 1 in. Tubes
C = Compact Welded
M = Marine Welded
1 = 150 psig 3 = 300 psig
1, 2, 3 Pass
Cond Number of Passes
Cond Waterbox Mod Level
Cond Waterbox Family
Cond Waterside DWP
1 = 150 psig 3 = 300 psig
A = 3/4 in. Tubes 1 = 1 in. Tubes
C = Compact
M = Marine
1, 2, 3 Pass
F A 21 12 - A 2 Z 750 - 2
C A 1 G LR B
EVAPORATOR WATERBOX NAMING
C A 21 12 - A 2 Z 750 - 2
CONDENSER NAMING
C A 1 G LR B
CONDENSER WATERBOX NAMING
LR = Inlet Left, Outlet Right
LL = Inlet Left, Outlet Left
RL = Inlet Right, Outlet Left
RR = Inlet Right, Outlet Right
Unit Wiring and Field Connections for YZ Centrifugal Chiller with Magnetic Bearing Controller6

Unit wiring
1. This wiring diagram describes the standard electronic control scheme for use with a YORK
Variable Speed Drive (VSD).
2. Field wiring to be in accordance with the National Electrical Code (NEC) and all other applicable
codes and specifications. Refer to 161.01-PW3 for field 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 number along
the right side indicates the line number location of relay contacts. An underlined contact
location signifies a normally closed contact.
4. Main Control Panel Class 1 Field Wiring Terminal connection points are indicated by numbers
within a rectangle. Main Control Panel Factory Wiring Terminal connection points are indicated
by numbers within a triangle. Component terminal markings are indicated by numbers within
a circle. Numbers adjacent to circuit lines are the circuit identification numbers.
Table 1: Connection points
Connection point Example
Main Control Panel Class 1 Field Wiring Terminal
Main Control Panel Factory Wiring Terminal
Component terminal markings
5. To cycle 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).
Remote run-stop switch (Line 32) is operative only in the “Remote” operating mode.
7. Device contact rating to be 5 mA at 115 VAC.
8. Contact rating is 5 A resistive at 120 VAC or 240 VAC.
9. For wiring diagrams of the VSD, refer to the YZ service manual 161.01-M3.
7Unit Wiring and Field Connections for YZ Centrifugal Chiller with Magnetic Bearing Controller

10. A jumper is installed between terminals 21 and 24 for normal operation. To check motor
rotation on initial start-up, the jumper may be removed and a momentary switch is installed
between terminals 21 and 24. Press the Start key on the display screen of the OptiViewTM
Control Panel. After initialization of the OptiView, jog the motor with the momentary switch.
Once proper rotation is obtained, replace the momentary switch with the 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 or 24 may cause inadvertant compressor
start-up.
11. VSD is setup to trip at 105% FLA.
12. Contact rating is 5 A resistive at 250 VAC and 30 VDC, 2 A inductive (0.4 PF) at 250 VAC and 30
VDC.
13. Field connected control power supply is not required, as a factory installed transformer is
provided inside the Variable Speed Drive (VSD).
14. Maximum allowable current draw for the sum of all loads is 2 A holding, 10 A inrush.
15. Each 115 VAC field-connected inductive load, that is, the relay coil, motor starter coil, and
similar components, must have a transient suppressor wired in parallel with its coil, physically
located at the coil. Spare transient suppressors and control circuit fuses are supplied in a bag
attached to the green ground screw in lower left corner of the control panel.
Note: Drawing number: 035-26662-000 REV E, SHT. 4
Legend
Table 2: Wiring diagram legend
Label Description
10L 2T protector (346 V and 600 V units only)
1T Class 2 power supply transformer
2T Class 2 power supply transformer
3M Condenser pump motor starter
1R Compressor motor (K18 - located on I/O board)
1SW Safety stop switch
BATT Battery
CP Condenser pressure (provided by transducer)
EEV Electronic expansion valve
EP Evaporator pressure (provided by transducer)
FLA Full load amperes (compressor motor)
FU Fuse
Unit Wiring and Field Connections for YZ Centrifugal Chiller with Magnetic Bearing Controller8

Table 2: Wiring diagram legend
Label Description
HGBP Hot gas bypass
HPCO High pressure cutout
K13, K14, K17 Relays mounted on I/O board. Refer to the operations manual Form 161.01-OM1.
L1 Inductor 4 A, 9 mH (460 VAC) or 8 A, 3 mH (230 VAC)
LCWT Leaving chilled water temperature
LLS Liquid level sensor (probe)
MBC Magnetic bearing controller
MOV Metal oxide varistor
MWT Motor winding temperature
OVA Cond. level control actuator
RES Resistor
Resistance temperature sensing element
Transient supressor
Terminal block, factory wiring
Terminal block, field connection
TB6 Terminal block, field (botttom), factory (top)
TB7 Terminal block, field (botttom), factory (top)
UPS Uninterruptible power supply
VGD Variable geometry diffuser
VSOP Variable speed oil pump
xSOL Solenoid valve
Field wiring
Factory wiring
Circuit board or enclosure boundary
Jack (J1, J2,…)
Plug (P1, P2, …)
Wire entrance hole in control panel
Option (as and when supplied) by YORK
Mechanical linkage
Shielded cable
Metal oxide varistor
Terminal located in starter (TB1 or 1TB)
Note: Drawing number: 035-26662-000 REV E, SHT. 5
9Unit Wiring and Field Connections for YZ Centrifugal Chiller with Magnetic Bearing Controller

Elementary wiring diagram
Figure 1: Elementary wiring diagram
LD27179
1
L
1
1FU
3
2
1
2
3
4
5
27
26
40
41
45
44
43
42
LT BLU
GRN/YEL
1T
1
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
C
29
16
6
53
K18
K14
K13
33
5, 7, 10, 19
64
62
61
55
56
151
150
34
32
1R
K18
25
22
23
1R-1
(K18)
1R-2
(K18)
TO LINE 39
35
1R-3
(K18)
36
2FU
165
161
162
164
154
155
156
157
K17
24
VAC
1
2
158
160
163
164
159
16
53
16
15
17
HPCO
59
GROUNDED
CONDUCTOR
RED
2
5
162
CONTROL SUPPLY
115VAC 50/60Hz
20A OR 2.0KVA SOURCE
SEE NOTE 13
7 AMP 600V
BUSS KTK-R-7
RUN
CONTACTS
REMOTE MODE
READY TO START
CYCLING
SHUTDOWN
ALARM
SAFETY
SHUTDOWN
ALARM
WARNING
ALARM
7 AMP 600V
BUSS KTK-R-7
I/O
BOARD
031-03631
CHILLED
LIQUID PUMP
RUN
TO FLOW SWITCHES, COND. LEVEL CONTROL
ACTUATOR AND OPTIONAL HGBP
(SEE NOTE 11)
MOTOR CONTROLLER FAULT
(OPEN ON FAULT)
153
152
CONDENSER LIQUID
PUMP RUN
2
1
J2
315
TB7
VGD
SHUTDOWN
TO PURGE COMP. RUN
RELAY (K120)
(PURGE PANEL)
162
R1
5
TB15
PURGE REGEN
SUPR
DRAIN TANK SOL
TO REGEN TANK
HTR RELAY (K122)
(PURGE PANEL)
6FU
166
PURGE PUMP RUN
RELAY (K121)
(PURGE PANEL)
PURGE INLET SOL
PURGE PUMP SOL
PURGE REGEN
TANK SOL
29
TB6
CLL
CL1
58
CL1
SUPR
SUPR
SUPR
29
TB6
R
1
2
1
2
1
2
1
2
5SOL
4SOL
7SOL
6SOL
(OPTIONAL)
(OPTIONAL)
TB7
2A 125V
CL1
MOTOR COOLING
SUPR
BOOSTER
1
TB6
M
Unit Wiring and Field Connections for YZ Centrifugal Chiller with Magnetic Bearing Controller10