York YD Quick start guide

WIRING DIAGRAM
CONTRACTOR _________________________ PURCHASER _____________________________________________
ORDER NO. ____________________________ JOB NAME ________________________________________________
JCI CONTRACT NO. _____________________ LOCATION ________________________________________________
JCI ORDER NO. _________________________ ENGINEER _______________________________________________
REFERENCE DATE ________ APPROVAL DATE ________ CONSTRUCTION DATE _______
Supersedes: 160.79-PW2 (616) Form: 160.79-PW2 (119)
FIELD CONTROL MODIFICATIONS
FOR YD CHILLER (STYLE D)
WITH OPTIVIEW CONTROL CENTER
Issue Date:
January 31, 2019
JOB DATA:
CHILLER MODEL NO. YD _________________
NO. OF UNITS __________________________
TYPE OF STARTING _____________________
Included by Johnson Controls for Field Installation (by others) are:
YES NO Per Unit
Chilled Water Flow Switch
Condenser Water Flow Switch
_______________________________________________________________
_______________________________________________________________

JOHNSON CONTROLS
2
FORM 160.79-PW2
ISSUE DATE: 01/31/2019
This equipment is a relatively complicated apparatus.
During rigging, installation, operation, maintenance,
or service, individuals may be exposed to certain com-
ponents 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, instal-
lation, 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
IMPORTANT!
READ BEFORE PROCEEDING!
GENERAL SAFETY GUIDELINES
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 in-
dividual 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:
Indicates a possible hazardous situation
which will result in death or serious injury
if proper care is not taken.
Indicates a potentially hazardous situa‑
tion which will result in possible injuries
or damage to equipment if proper care is
not taken.
Identies a hazard which could lead to
damage to the machine, damage to other
equipment and/or environmental pollu‑
tion if proper care is not taken or instruc‑
tions and are not followed.
Highlights additional information useful
to the technician in completing the work
being performed properly.
External wiring, unless specied 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 accor‑
dance with Johnson Controls’ published specications and must be performed only by a qualied
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 warn‑
ing will void the manufacturer’s warranty and cause serious damage to property or personal injury.

JOHNSON CONTROLS 3
FORM 160.79-PW2
ISSUE DATE: 01/31/2019
CHANGEABILITY OF THIS DOCUMENT
In complying with Johnson Controls’ policy for con-
tinuous product improvement, the information con-
tained 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 John-
son 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, rig-
ging, 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.
CHANGE BARS
Revisions made to this document are indicated with
a line along the left or right hand column in the area
the revision was made. These revisions are to technical
information and any other changes in spelling, gram-
mar or formatting are not included.
ASSOCIATED LITERATURE
MANUAL DESCRIPTION FORM NUMBER
Operation - YD Style D Optiview Control Center 160.79-O3
Wiring Diagram - YD Style D with Optiview Control Center and Electro-Mechanical Starter 160.79-PW4
Wiring Diagram - YD Style D with Optiview Control Center and Modbus SSS/VSD 160.79-PW5

JOHNSON CONTROLS
4
FORM 160.79-PW2
ISSUE DATE: 01/31/2019
THIS PAGE INTENTIONALLY LEFT BLANK.

JOHNSON CONTROLS 5
FORM 160.79-PW2
ISSUE DATE: 01/31/2019
TABLE OF CONTENTS
SECTION 1 - ENERGY MANAGEMENTS SYSTEMS ............................................................................................7
SECTION 2 - FIELD CONTROL MODIFICATIONS ................................................................................................. 9
Remote Mode Ready to Start Contact .............................................................................................................9
Cycling Shutdown Contacts .............................................................................................................................9
Safety Shutdown Contacts ...............................................................................................................................9
Run Contacts..................................................................................................................................................10
Remote Run-Stop Contacts from EMS ..........................................................................................................10
Remote/Local Cycling Devices....................................................................................................................... 11
Multi-Unit Sequence ....................................................................................................................................... 11
Condenser Flow Sensors ............................................................................................................................... 11
Thermal Type Flow Sensor............................................................................................................................. 12
Digital-Type Flow Sensors..............................................................................................................................12
Electro-Mechanical Starter Manual Reset Overloads ....................................................................................12
Remote Current Limit Setpoint with 0-10VDC, 2-10VDC, 0-20mA, 4-20mA,
or Pulse Width Modulation Signal ..................................................................................................................13
Remote Leaving Chilled Liquid Setpoint with 0-10VDC, 2-10VDC, 0-20mA, 4-20mA,
or Pulse Width Modulation Signal ..................................................................................................................14
Remote Leaving Chilled Liquid Temperature Setpoint with PWM Signal .......................................................16
External Signal for Refrigeration Unit Failure .................................................................................................17
Configured for Manual Restart After Power Failure........................................................................................17
Thermal Type Flow Sensor............................................................................................................................. 18
Paddle/DP Type Flow Sensor.........................................................................................................................18
Digital-Type Flow Sensors..............................................................................................................................18

JOHNSON CONTROLS
6
FORM 160.79-PW2
ISSUE DATE: 01/31/2019
LIST OF FIGURES
FIGURE 1 - Remote Mode Ready to Start Contacts.................................................................................................9
FIGURE 2 - Cycling Shutdown Contacts...................................................................................................................9
FIGURE 3 - Safety Shutdown Contacts ....................................................................................................................9
FIGURE 4 - Run Contacts (Compressor #1)...........................................................................................................10
FIGURE 5 - Run Contacts (Compressor #2)...........................................................................................................10
FIGURE 6 - Anticipatory/Alarm Contacts.................................................................................................................10
FIGURE 7 - Remote Start-Stop Contacts from Energy Management Systems ......................................................10
FIGURE 8 - Remote/Local Cycling Devices Compressor #1 .................................................................................. 11
FIGURE 9 - Remote/Local Cycling Devices Compressor #2 .................................................................................. 11
FIGURE 10 - Multi-Unit Sequence .......................................................................................................................... 11
FIGURE 11 - Condenser Flow Sensors................................................................................................................... 11
FIGURE 12 - Paddle/DP Type Flow Sensor............................................................................................................12
FIGURE 13 - Electro-Mechanical Starter Manual Reset Overloads
(2300 To 4160 Volts U.l. Or C.S.A. Approved Units Only) .................................................................12
FIGURE 14 - Electro-Mechanical Starter Manual Reset Overloads
(2300 To 4160 Volts U.l. Or C.S.A. Approved Units Only) .................................................................13
FIGURE 15 - Remote Current Limit Setpoint with 0-10VDC Or 2-10VDC Signal ...................................................13
FIGURE 16 - Remote Current Limit Setpoint with 0-20mA Or 4-20mA Signal ........................................................ 14
FIGURE 17 - Remote Current Limit Setpoint with PWM Signal ..............................................................................14
FIGURE 18 - Remote Current Limit Setpoint with 0-1VDC or 2-10VDC Signal ...................................................... 15
FIGURE 19 - Remote Leaving Chilled Liquid Temperature Setpoint with 0-20mA Or 4-20mA Signal ....................16
FIGURE 20 - Remote Leaving Chilled Liquid Temperature Setpoint with PWM Signal ..........................................17
FIGURE 21 - External Signal for Refrigeration Unit Failure (Note 6) ......................................................................17
FIGURE 22 - Auxiliary Safety Shutdown Input ........................................................................................................17
FIGURE 23 - Evaporator Flow Sensors ..................................................................................................................18
FIGURE 24 - Paddle/DP Type Flow Sensor............................................................................................................18

JOHNSON CONTROLS 7
SECTION 1 - ENERGY MANAGEMENTS SYSTEMS
FORM 160.79-PW2
ISSUE DATE: 01/31/2019
1
YD chiller design allows for ease of interfacing with
Energy Management Systems (EMS). The OptiView™
Control Center includes unit status contacts, provisions
for remote control inputs and provisions for remote
setpoint reset of leaving chilled liquid temperature and
current limit for EMS interfacing.
Five sets of unit status contacts are factory furnished
through a field wiring terminal board in the OptiView
Control Center. Each set of contacts are single pole,
normally open, rated at 5 amperes resistive at 240VAC.
Chiller status contacts are provided for unit:
• Remote Mode Ready to Start – See Figure 1 on
page 9.
• Cycling Shutdown – See Figure 2 on page 9.
• Safety Shutdown – See Figure 3 on page 9.
• Run (System Operating) – See Figure 4 on page
10 and Figure 5 on page 10.
• Anticipatory/Alarm – See Figure 6 on page 10.
Four sets of inputs are available to the EMS, al-
lowing for remote control of unit operation. Input
device con- tact rating shall be 5 milliamperes at
115VAC. Field wiring terminal board (TB4) in the
OptiView Control Center permits connection for
the following operation:
• Remote Run-Stop Switch – See Figure 7 on page
10.
• Remote/Local Cycling Devices – See Figure 8 on
page 11
• Multi-unit sequence – See Figure 10 on page 11
The chiller should not be cycled by the Energy Man-
agement System because the large motor used to drive
the centrifugal compressor is limited to one start per 30
minutes. Instead, it is possible to limit the compressor
motor amp draw indirectly or directly by the following
methods:
1. Application of Sequence Control Kit, so only one
unit is running, when a single unit can carry the
cooling load.
2. When multiple unit installations are controlled by
an EMS, a remote run-stop switch input is avail-
able to start and stop each chiller per Figure 7 on
page 10. Contact rating shall be 5 milliamperes
at 115 volts A.C.
3. The OptiView Control Center has a programma-
ble time clock function as a standard feature with
holiday capability. This offers one preset automat-
ic Start-Stop per day on a seven day calendar ba-
sis with the ability to program a single additional
holiday start and stop time up to a week in ad-
vance. Chilled water pump control contacts (see
Note 7) are also provided, allowing for efcient
automatic operation of the chilled water pump to
reduce energy. Two chilled water pump operating
modes are available.
4. Reduce the compressor-motor kW input (and
thus amps), by raising the leaving chilled liquid
temperature through remote temperature control
setpoint in the “remote” operating mode. When
remote temperature reset is accomplished by sup-
plying a 1 to 11 second pulse-width modulated
signal, refer to Figure 20 on page 17. Through
use of the remote temperature control analog in-
put on the Microboard, the leaving chilled liquid
temperature may be reset via a 0 to 20 or 4 to
20mA D.C. current signal, a 0 to 10 or 2 to 10 volt
D.C. signal.
5. Current limiting of demand during pulldown may
be accomplished by using the standard PULL-
DOWN DEMAND LIMIT function provided
in the OptiView Control Center. The “Pulldown
Demand Limit” key can be programmed to limit
compressor motor current from 30 to 100 percent
of full load amperes, for 1 to 255 minutes follow-
ing each compressor start. For more details, refer
to Unit Operation Manual Form 160.79‑O1.
SECTION 1 - ENERGY MANAGEMENTS SYSTEMS

JOHNSON CONTROLS
8
FORM 160.79-PW2
ISSUE DATE: 01/31/2019
SECTION 1 - ENERGY MANAGEMENTS SYSTEMS
6. Controlling the maximum allowable compres-
sor motor amps from 30 to 100% through remote
current limit setpoint. Refer to Figure 17 on page
14 when the remote current limit is accom-
plished by supplying a 1 to 11 second pulse-width
modulated signal in the “remote” operating mode.
A jumper congurable analog input is available
for remote current limit setpoint via a 0 to 20 or 4
to 20mA D.C. current signal, a 0 to 10 or 2 to 10
volt D.C. signal.
7. The Building Automation System (BAS) may
be interfaced with the chiller OptiView Control
Center to provide unied chiller plant system
control. The BAS System directly communicates
with the OptiView Control Center via the SC-EQ
Gateway card which may be installed in the Con-
trol Center. All temperatures, pressures, safety
alarms and cycling information known to the Op-
tiView Control Center are then available to the
BAS System for integrated chiller plant control,
data logging, and local and remote operator dis-
plays. The SC-EQ Gateway card also allows the
BAS to start, stop, and reset the chiller’s leaving
chilled water and current limit setpoints.

JOHNSON CONTROLS 9
SECTION 2 - FIELD CONTROL MODIFICATIONS
FORM 160.79-PW2
ISSUE DATE: 01/31/2019
2
SECTION 2 - FIELD CONTROL MODIFICATIONS
REMOTE MODE READY TO START CONTACT
When closed, these contacts signify the following:
1. The OptiView Control Center is in “digital”, “an-
alog” or “ISN” remote operating mode, allowing
for energy management system or remote start/
stop control (Figure 7 on page 10).
2. All chiller safety cutout controls are in the normal
position, so they will allow the unit to start.
3. All chiller cycling cutout controls are in the nor-
mal position, so they will allow the unit to start.
4. The OptiView Control Center has been set to
the "RUN" mode via the START button on the
HOME screen.
5. The 30 minute anti-recycle timer has timed
out. A closure of the Remote Mode Ready
to Start Contacts then signies that the unit
shall start when the Energy Management Sys-
tem closes the Remote Run-Stop contact (Fig‑
ure 7 on page 10). When the Remote Mode
Ready to Start Contacts close, the OptiView
Control Center will display the following mes-
sage: SYSTEM READY TO START.
FIGURE 1 - REMOTE MODE READY TO START
CONTACTS
LD06820
CYCLING SHUTDOWN CONTACTS
When closed, these contacts signify the unit is not per-
mitted to start due to a CYCLING shutdown condition.
The unit will automatically restart after the cycling
condition is no longer present. Unit Operation Manual
Form 160.79‑O1 provides a list and explanation of all
Cycling shutdowns. While these contacts are closed,
the OptiView Control Center will display CYCLING
SHUTDOWN – AUTO RESTART on the System Sta-
tus Bar and the cause of the shutdown on the System
Details bar of the display. Cycling Shutdown contacts
function in all operating modes.
FIGURE 2 - CYCLING SHUTDOWN CONTACTS
LD06821
SAFETY SHUTDOWN CONTACTS
When closed, these contacts signify the unit is not per-
mitted to start due to a SAFETY shutdown condition.
Safety shutdowns require a manual reset procedure
be performed before the unit can be restarted. Unit
Operation Manual Form 160.79‑O1 provides a list
and explanation of all Safety shutdowns. While these
contacts are closed, the OptiView Control Center will
display “Safety Shutdown – Manual Restart” on the
System Status Bar and the cause of the shutdown on
the System Details Bar of the display. These contacts
will remain closed until the safety condition no lon-
ger exists and a manual reset is performed by placing
the OptiView Control Center COMPRESSOR Switch
in the Stop-Reset position (O). The unit can then be
restarted. Safety Shutdown contacts function in all op-
erating modes.
FIGURE 3 - SAFETY SHUTDOWN CONTACTS
LD06823

JOHNSON CONTROLS
10
FORM 160.79-PW2
ISSUE DATE: 01/31/2019
SECTION 2 - FIELD CONTROL MODIFICATIONS
RUN CONTACTS
When closed, these contacts signify that the unit is
operating. The OptiView Control Center will display a
System Run Message.
FIGURE 4 - RUN CONTACTS (COMPRESSOR #1)
LD06822
FIGURE 5 - RUN CONTACTS (COMPRESSOR #2)
LD6822a
ANTICIPATORY/ALARM CONTACTS
These contacts will close whenever one or more
WARNING conditions occurs. They will remain
closed while the condition is in effect. On most
Warnings, the contacts automatically open when
the condition is no longer present. On other warn-
ings, the contacts will open only after the condi-
tion is no longer present and the WARNING RESET
key is pressed in Operator (or higher) access level.
Refer to Unit Operation Manual Form 160.79‑O1 for
warning messages and conditions.
FIGURE 6 - ANTICIPATORY/ALARM CONTACTS
LD04604
REMOTE RUN-STOP CONTACTS FROM EMS
When the OptiView Control Center is in the
“Digital”, “Analog” or “ISN” remote operating mode
and the Local Run/Stop is in the "RUN" mode, with
the Remote Run-Stop Switch contact connected to
TB4-1 and TB4-7 closed, and the Remote Mode Ready
to Start Contacts closed (Figure 1 on page 9), the
unit will start. A subsequent opening of the Remote
Run-Stop Switch contact causes the chiller to shut
down. The OptiView Control Center will display RE-
MOTE STOP because the Energy Management Sys-
tem Remote Run-Stop Switch contact has commanded
the unit to shut down.
FIGURE 7 - REMOTE START-STOP CONTACTS
FROM ENERGY MANAGEMENT SYSTEMS
LD20689
A maintained contact must be used for the Run-Stop
Switch.
Even when the chiller is applied with Re‑
mote Run‑Stop (when the Control Center
is in the “remote operating mode), a SAFE‑
TY STOP by an operator or others can
STOP the compressor from the OptiView
Control Center and prevent the chiller
from restarting. However, the operator
cannot locally start the compressor using
the START button on the HOME screen,
when the control center is in the “remote”
operating mode.

JOHNSON CONTROLS 11
SECTION 2 - FIELD CONTROL MODIFICATIONS
FORM 160.79-PW2
ISSUE DATE: 01/31/2019
2
REMOTE/LOCAL CYCLING DEVICES
The closure of an automatic reset device across this
input will permit the unit to operate in all operating
modes. Conversely, an opening of the device contacts
will inhibit the unit from operating; the OptiView Con-
trol Center will then display the following messages:
CYCLING SHUTDOWN – AUTO RESTART and
SYSTEM CYCLING – CONTACTS OPEN.
FIGURE 8 - REMOTE/LOCAL CYCLING DEVICES
COMPRESSOR #1
LD06825
LD06825a
FIGURE 9 - REMOTE/LOCAL CYCLING DEVICES
COMPRESSOR #2
The OptiView Control Center contains a
seven day time clock to select daily sched‑
ule Start/Stop times (Sunday through
Saturday including one or more holidays
in week) up to one full week at a time. So
automatic start and stop of the unit on a
daily basis, at predetermined times, can
be programmed as a standard feature; an
additional program timer is not required
for this function.
MULTI-UNIT SEQUENCE
For multiple chiller installation application, Multi-
Unit Sequence contacts are available to start and stop
each unit. The maintained closure of a device contacts
across terminals 1 and 9 will permit the unit to oper-
ate in all the operating modes with the “compressor”
switch in the “RUN” (l) position. Conversely, an open-
ing of the device contacts will inhibit the unit from op-
erating; the OptiView Control Center will then display
the following message: CYCLING SHUTDOWN —
AUTO RESTART and MULTI-UNIT CYCLING —
CONTACTS OPEN.
LD06828
FIGURE 10 - MULTI-UNIT SEQUENCE
CONDENSER FLOW SENSORS
The Thermal-type flow sensor interfaces with the mi-
cro board and Paddle/Differential Pressure type flow
sensors interfaces with the I/O board
LD20683
MICRO BOARD
THERMAL-TYPE FLOW SENSOR
11
1
TB4
I/O BOARD
PADDLE-TYPE FLOW SENSOR
J14-7
J14-8
+5V
FIGURE 11 - CONDENSER FLOW SENSORS
For the program to read the appropriate inputs for the
flow sensor status, the actual flow sensor type used
must be entered at the keypad OPERATIONS Screen
using Service Access Level. Enter "Analog" for Ther-
mal-type or "Digital" for Paddle/DP type. Refer to Unit
Operation Manual Form 160.79‑O1.

JOHNSON CONTROLS
12
FORM 160.79-PW2
ISSUE DATE: 01/31/2019
SECTION 2 - FIELD CONTROL MODIFICATIONS
When flow is sensed, the flow sensor contacts are
closed. Opening of the flow sensor contacts (no flow)
for 2 continuous seconds causes a cycling shutdown
displaying "Condenser - Flow Switch Open". The flow
sensor status is bypassed for the first 30 seconds of
"System Run".
If “Digital” (Paddle/DP) is selected and no condenser
flow sensor is used, a jumper must be installed between
terminals 1 and 11 .
LD20684
FIGURE 12 - PADDLE/DP TYPE FLOW SENSOR
THERMAL TYPE FLOW SENSOR
When the Thermal-type flow switch is used, the flow
switch uses the cooling effect of liquid to sense flow.
When the flow of liquid is sensed, the solid state re-
lay output is turned on applying > +4VDC to the mi-
croboard input J14-7.
When no flow of liquid is sensed, the solid state re-
lay output is turned off, this results in <1VDC to the
microboard input and the OptiView Control Cen-
ter will display the following message: CYCLING
SHUTDOWN – AUTO RESTART and CONDENSER
FLOW SWITCH OPEN.
DIGITAL-TYPE FLOW SENSORS
If desired, a digital type condenser water flow sensor
can be applied. Paddle type – JCI F261MAL-V01C,
max. 150 psi (YORK Part No. 024-26116-000);
McDonnel-Miller FS7-4W, max. 300 psi (YORK Part
No. 024-12144-000); Differential pressure type – Pot-
ter 1382, max. 300 psi (YORK Part No. 025-30919-
000) available at additional cost. When condenser
water is flowing, the flow switch contact will close.
Opening of the condenser water flow switch contacts
for 2 continuous seconds will cause unit shutdown.
The Flow Switch Status is checked 30 seconds into
“System Run” and continuously thereafter. The Op-
tiView Control Center will display the following mes-
sage: CYCLING SHUTDOWN – AUTO RESTART
and CONDENSER FLOW SWITCH OPEN.
ELECTRO-MECHANICAL STARTER MANUAL
RESET OVERLOADS
The chiller compressor type deter‑
mines which terminals must be used for
this feature. Failure to use the proper
terminals could result in serious chiller
damage!
Terminals are available for connection of the
manual reset overloads and/or safety devices in the high
voltage Electro-Mechanical Starter for U.L. or C.S.A.
approved units having 2300 to 4160 volt motors. The
appropriate terminals must be selected based on the
chiller compressor. For compressor 1, use terminals
15 and 153 as shown in Figure 13 on page 12. For
compressor 2, use terminals 15 and 253 as shown in
Figure 14 on page 13. Refer to Wiring Diagram
Form 160.79‑PW4. An opening of the contacts causes
the OptiView Control Center to display:
CYCLING SHUTDOWN – AUTO RESTART and
MOTOR CONTROLLER # 1– CONTACTS OPEN,
MOTOR CONTROLLER # 2– CONTACTS OPEN.
To restart the chiller, reset the external device in the
Electro-mechanical Starter that caused the shutdown.
Then the unit will automatically restart.
LD20685
FIGURE 13 - ELECTRO-MECHANICAL STARTER
MANUAL RESET OVERLOADS (2300 TO 4160
VOLTS U.L. OR C.S.A. APPROVED UNITS ONLY)

JOHNSON CONTROLS 13
SECTION 2 - FIELD CONTROL MODIFICATIONS
FORM 160.79-PW2
ISSUE DATE: 01/31/2019
2
LD20686
FIGURE 14 - ELECTRO-MECHANICAL STARTER
MANUAL RESET OVERLOADS (2300 TO 4160
VOLTS U.L. OR C.S.A. APPROVED UNITS ONLY)
REMOTE CURRENT LIMIT SETPOINT WITH
0-10VDC, 2-10VDC, 0-20MA, 4-20MA, OR
PULSE WIDTH MODULATION SIGNAL
The Remote Current Limit setpoint can be reset over
the range of 100% to 30% Full Load Amps (FLA) by
supplying (by others) a 0-10VDC, 2-10VDC, 0-20mA,
4-20mA, or 1 to 11 second Pulse Width Modulated
(PWM) signal to the OptiView Control Center. The
OptiView Control Center must be configured appro-
priately to accept the desired signal type as follows:
• The appropriate Remote Mode must be selected:
Analog Remote Mode must be selected when
using a voltage or current signal input. Digital
Re-mote Mode must be selected when using a
PWM input.-
• If Analog Remote Mode is selected, the
Remote Analog Input Range setpoint must be
set to “0-10VDC” or “2-10VDC” as detailed be-
low, regardless of whether the signal is a voltage
or current input signal type.
• Microboard Program Jumper P23 must be posi-
tioned appropriately per the input signal type as
detailed below. It is recommended that a qualied
Service Technician position this jumper.
Important! The signal type used for Re‑
mote Current Limit Setpoint reset and
the signal type used for Remote Leaving
Chilled Liquid Temperature setpoint re‑
set must be the same. For example, if a
0‑10VDC signal is being used for Remote
Leaving Chilled Liquid Temperature Re‑
set, then a 0‑10VDC signal must be used
for Remote Current Limit Reset.
0-10VDC - As shown in Figure 15 on page 13,
connect input to Microboard J22-1 (signal) and J22-5
(Gnd). The setpoint varies linearly from 100% to 30%
FLA as the input varies from 0-10VDC. This input will
only be accepted when Analog Remote Mode is se-
lected, the Remote Analog Input Range setpoint is set
for 0-10 Volts, and Microboard Program Jumper JP23
has been removed. Calculate the setpoint for various
inputs as follows:
SETPOINT (%) = 100 – (VDC x 7)
For example, if the input is 5VDC, the setpoint would
be set to 65% as follows:
SETPOINT (%) = 100 – (5 x 7) = 100 – 35
= 65%
LD04498





FIGURE 15 - REMOTE CURRENT LIMIT SETPOINT
WITH 0-10VDC OR 2-10VDC SIGNAL
2-10VDC - As shown in Figure 15 on page 13,
connect input to Microboard J22-1 (signal) and J22-5
(Gnd). The setpoint varies linearly from 100% to 30%
FLA as the input varies from 2 to 10VDC. This input
will only be accepted when Analog Remote Mode is
selected, the Remote Analog Input Range setpoint
is set for “2-10 Volts” and Microboard Program
Jumper JP23hasbeenremoved.Calculatethesetpointfor
various inputs as follows:
SETPOINT (%) = 100 – [(VDC – 2) X 8.75]

JOHNSON CONTROLS
14
FORM 160.79-PW2
ISSUE DATE: 01/31/2019
SECTION 2 - FIELD CONTROL MODIFICATIONS
For example, if the input is 5VDC, the setpoint would
be set to 74% as follows:
SETPOINT (%) = 100 – [(5-2) X 8.75]
= 100 – [3 X 8.75]
= 100 – 26.25 = 74%
LD04499





FIGURE 16 - REMOTE CURRENT LIMIT SETPOINT
WITH 0-20MA OR 4-20MA SIGNAL
0-20 mA - As shown in Figure 16 on page 14, con-
nect input to Microboard J22-2 (signal) and J2-5 (Gnd).
The setpoint varies linearly from 100% to 30% FLA as
the input varies from 0mA to 20mA. This input will
only be accepted when Analog Remote Mode is se-
lected, the Remote Analog Input Range setpoint is set
for 0-10 Volts, and Microboard Program Jumper JP23
has been placed on pins 1 and 2. Calculate the setpoint
for various inputs as follows:
SETPOINT (%) = 100 – (MA X 3.5)
For example, if the input is 8mA, the setpoint would be
set to 72% as follows:
SETPOINT (%) = 100 – (8 X 3.5)
= 100 – 28 = 72%
4-20mA - As shown in Figure 16 on page 14, con-
nect input to Microboard J22-2 (signal) and J2-5 (Gnd).
The setpoint varies linearly from 100% to 30% FLA as
the input varies from 4mA to 20mA. This input will
only be accepted when Analog Remote Mode is se-
lected, the Remote Analog Input Range setpoint is set
for “2-10 Volts” and Microboard Program Jumper JP23
has been placed on pins 1 and 2. Calculate the setpoint
for various inputs as follows:
SETPOINT (%) = 100 – [(MA – 4) X 4.375]
For example, if the input is 8mA, the setpoint would be
set to 83% as follows:
SETPOINT (%) = 100 – [(8 – 4) X 4.375]
= 100 – (4 X 4.375)
= 100 – 17.5 = 82.5
= 83%
LD06832
FIGURE 17 - REMOTE CURRENT LIMIT SETPOINT
WITH PWM SIGNAL
PWM - The Pulse Width Modulation input is in the
form of a 1 to 11 second relay contact closure that
applies 115VAC to the I/O Board TB4-20 for 1 to 11
seconds. As shown in Figure 17 on page 14, connect
dry closure relay contacts between I/O Board TB4-20
(signal) and TB4-1 (115VAC). The setpoint varies lin-
early from 100% to 30% as the relay contact closure
time changes from 1 to 11 seconds. The relay contacts
should close for 1 to 11 seconds at least once every 30
minutes to maintain the setpoint to the desired value.
If a 1 to 11 second closure is not received within 30
minutes of the last closure, the setpoint is defaulted to
100%. A closure is only accepted at rates not to ex-
ceed once every 70 seconds. This input will only be
accepted in Digital Remote Mode. Calculate the
setpoint for various pulse widths as follows:
SETPOINT (%) = 100 – [(PULSE WIDTH IN
SECONDS – 1) X 7]
For example, if the relay contacts close for 3 seconds,
the setpoint would be set to 86% as follows:
SETPOINT (%) = 100 – [(3 – 1) X 7]
= 100 – (2 X 7)
= 100 – 14
= 86%
REMOTE LEAVING CHILLED LIQUID
SETPOINT WITH 0-10VDC, 2-10VDC, 0-20MA,
4-20MA, OR PULSE WIDTH MODULATION
SIGNAL
Remote Leaving Chilled Liquid Temperature Setpoint
Reset can be accomplished by supplying (by others)
a 0-10VDC, 2-10VDC, 0-20mA, 4-20mA or 1 to 11
second Pulse Width Modulated (PWM) signal to the
Control Center. The Leaving Chilled Liquid
Temperature Setpoint is programmable over the
range of 38°F to 70°F (water applications), 36°F to
70°F (water applications with Smart Freeze Protec-
tion enabled) or 10°F to 70°F (brine applications).

JOHNSON CONTROLS 15
SECTION 2 - FIELD CONTROL MODIFICATIONS
FORM 160.79-PW2
ISSUE DATE: 01/31/2019
2
The Remote Input Signal changes the setpoint by
creating an offset above the locally programmed Leav-
ing Chilled Liquid Temperature Base Setpoint value.
The setpoint can be the locally programmed Remote
Reset Temperature Range setpoint) above the Local
Leaving Chilled Liquid Temperature Setpoint. For ex-
ample, if the Local Setpoint is 40°F and the Remote
Reset Temperature Range setpoint is programmed for
10°F, the Leaving Chilled Liquid Temperature setpoint
can be remotely reset over the range of 40°F to 50°F.
The Control Center must be configured appropriately
to accept the de- sired signal type as follows:
• The appropriate Remote Mode must be selected:
Analog Remote Mode must be selected when
using a voltage or current signal input. Digital
Remote Mode must be selected when using a
PWM input.
• If Analog Remote Mode is selected, the
Remote Analog Input Range setpoint must be
set to “0-10VDC” or “2-10VDC” as detailed be-
low, regardless of whether the signal is a voltage
or current signal type.
• Microboard Program Jumper JP24 must be posi-
tioned appropriately per the input signal type as
detailed below. It is recommended a qualied Ser-
vice Technician position this jumper.
Important! The signal type used for Re‑
mote Leaving Chilled Liquid Temperature
setpoint reset and the signal type used for
Remote Current Limit setpoint reset must
be the same. For example, if a 0‑10VDC
signal is being used for Remote Current
Limit Setpoint, then a 0‑10VDC signal
must be used for Leaving Chilled Liquid
Temperature reset.
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LD04500
FIGURE 18 - REMOTE CURRENT LIMIT
SETPOINT WITH 0-1VDC OR 2-10VDC SIGNAL
0-10VDC - As shown in Figure 18 on page 15,
connect input to Microboard J22-3 (signal) and J22-5
(Gnd). A 0VDC signal produces a 0°F offset. A 10VDC
signal produces the maximum offset (10 or 20°F above
the Local Setpoint value). The setpoint is changed
linearly between these extremes as the input varies
linearly over the range of 0VDC to 10VDC. This input
will only be accepted when Analog Remote Mode is
selected, the Remote Analog Input Range setpoint is
set for “0-10VDC” and Microboard Program Jumper
JP24 has been removed. Calculate the setpoint for vari-
ous inputs as follows:
OFFSET(°F) = (VDC)(REMOTE RESET TEMP. RANGE)
10
SETPOINT (°F) = LOCAL SETPOINT + OFFSET
For example, if the input is 5VDC and the Remote Re-
set Temp Range setpoint is programmed for 10°F and
the Local Leaving Chilled Liquid Temperature setpoint
is programmed for 40°F, the setpoint would be set to
45°F as follows:
OFFSET (°F) = 5 X 10
10
= 50
10
= 5°F
SETPOINT (°F) = 40 + 5
= 45°F
2-10VDC - As shown in Figure 18 on page 15,
connect input to Microboard J22-3 (signal) and J2-5
(Gnd). A 2VDC signal produces a 0°F offset. A 10VDC
signal produces the maximum allowed offset (10°F or
20°F above the Local Setpoint Value). The setpoint is
changed linearly between these extremes as the input
varies over the range of 2VDC to 10VDC. This input
will only be accepted when Analog Remote Mode is
selected, the Remote Analog Input Range setpoint
is set for “2-10VDC” and the Microboard Program
Jumper JP24 has been removed. Calculate the setpoint
for various inputs as follows:
OFFSET (°F) = (VDC – 2)(REMOTE RESET TEMP RANGE)
8
SETPOINT (°F) = LOCAL SETPOINT + OFFSET

JOHNSON CONTROLS
16
FORM 160.79-PW2
ISSUE DATE: 01/31/2019
SECTION 2 - FIELD CONTROL MODIFICATIONS
For example, if the input is 5VDC and the
Remote Reset Temp. Range setpoint is programmed
for 40°F, the setpoint would be set to 43.8°F.
OFFSET (°F) = (5 – 2)(10)
8
= (3)(10)
8
= 30
8
SETPOINT (°F) = 40 + 3.8
= 43.8°F
0-20mA - As shown in Figure 19 on page 16,con-
nect input to Microboard J22-4 (signal) and J22-5
(Gnd). A 0mA signal produces a 0°F offset. A 20mA
signal produces the maximum allowed offset (10 or
20°F above the local setpoint value). The setpoint is
changed linearly between these extremes as the input
varies over the range of 0-20mA. This input will only
be accepted when Analog Remote Mode is selected,
the Remote Analog Input Range setpoint is set for
“0-10VDC” and Microboard Program Jumper J24 has
been placed on pins 1 and 2. Calculate the setpoint for
various inputs as follows:
OFFSET (°F) = (MA)(REMOTE RESET TEMP RANGE)
20
SETPOINT(°F) = LOCAL SETPOINT + OFFSET
For example, if the input is 8mA, the Remote Reset
Temp Range Setpoint is programmed for 10°F and the
Local Leaving Chilled Liquid Temperature setpoint
is programmed for 40°F, the setpoint would be set to
44°F as follows:
OFFSET (°F) = (8)(10)
20
= (80)
20
= 4°F
SETPOINT (°F) = 40 + 4
= 44°F
LD04501
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FIGURE 19 - REMOTE LEAVING CHILLED LIQUID
TEMPERATURE SETPOINT WITH 0-20MA OR
4-20MA SIGNAL
4-20mA - As shown in Figure 19 on page 16,con-
nect input to Micro Board J22-4 (signal) and J22-5
(Gnd.). A 4mA signal produces a 0°F offset. A 20mA
signal produces the maximum allowed offset (10 or
20°F above the Local setpoint Value). The setpoint is
changed linearly between these extremes as the input
varies over the range of 0-20mA. This input will only
be accepted when Analog Remote Mode is selected,
the Remote Analog Input Range setpoint is set for
“2-10VDC” and Microboard Program Jumper JP24
has been placed on pins 1 and 2. Calculate the setpoint
for various inputs as follows:
OFFSET(°F) = (MA – 4)(REMOTE TEMP. RESET RANGE)
16
SETPOINT(°F) = LOCAL SETPOINT + OFFSET
For example, if input is 8mA, and the Remote Reset
Temp. Range setpoint is programmed for 10°F and the
Local Leaving Chilled Liquid Temperature setpoint
is programmed for 40°F, the setpoint would be set to
42.5°F as follows:
OFFSET (°F) = (8 – 4)(10)
16
= (4)(10)
16
= 40
16
= 2.5°F
SETPOINT (°F) = 40 + 2.5
= 42.5°F
REMOTE LEAVING CHILLED LIQUID
TEMPERATURE SETPOINT WITH PWM
SIGNAL
PWM – The Pulse Width Modulation input is in the
form of a 1 to 11 second relay contact closure that ap-
plies 115VAC to the I/O Board TB4-19 for 1-11 sec-
onds. As shown in Figure 20 on page 17, connect
dry closure relay contacts between I/O Board TB4-19
(input) and TB4-1 (115VAC). A contact closure time
(pulse width) of 1 second produces a 0°F offset. An 11
second closure produces the maximum allowed offset
(10 or 20°F above the local setpoint value).

JOHNSON CONTROLS 17
SECTION 2 - FIELD CONTROL MODIFICATIONS
FORM 160.79-PW2
ISSUE DATE: 01/31/2019
2
FIGURE 20 - REMOTE LEAVING CHILLED LIQUID
TEMPERATURE SETPOINT WITH PWM SIGNAL
LD06833
The relay contacts should close for 1 to 11 seconds at
least once every 30 minutes to maintain the setpoint
to the desired value. If a 1 to 11 second closure is not
received within 30 minutes of the last closure, the
setpoint is defaulted to the Local setpoint value. A clo-
sure is only accepted at rates not to exceed once every
70 seconds. This input will only be accepted in Digital
Remote Mode. Calculate the setpoint for various pulse
widths as follows:
OFFSET(°F) = (PULSE WIDTH IN SECONDS)
(REMOTE RESET TEMP. RANGE)
10
SETPOINT(°F) = LOCAL SETPOINT + OFFSET
For example, if the relay contacts close for 5 sec-
onds and the Remote Reset Temp Range setpoint is
programmed for 10°F, and the Local Leaving Chilled
Liquid Temperature setpoint is programmed for 40°F,
the setpoint would be set to 44°F as follows:
OFFSET (°F) = (5 – 1)(10)
10
= (4)(10)
10
= 40
10
= 4°F
SETPOINT (°F) = 40 + 4
= 44°F
EXTERNAL SIGNAL FOR REFRIGERATION
UNIT FAILURE
When the Safety Shutdown Contacts (see Figure 3 on
page 9) are not connected to an Energy Manage-
ment System they may be employed to energize a local
or remote safety alarm (by others). When the normally
open Safety Shutdown Contacts close, the alarm will
indicate shutdown of the unit. The cause of shutdown
will be one or more of the safety conditions listed
in Unit Operations Manual (Forms 160.69‑O1 and
160.69‑O3).
FIGURE 21 - EXTERNAL SIGNAL FOR
REFRIGERATION UNIT FAILURE (NOTE 6)
LD06834
CONFIGURED FOR MANUAL RESTART
AFTER POWER FAILURE
If the unit was shut down because of
Cycling Shutdown Contacts (see Fig‑
ure 7 page 10) the alarm will not be
energized, but the unit will have been
shut down. A closure of the safety alarm
contacts means that an operator must
manually reset and restart the unit.
When the Safety Shutdown contacts close, the
OptiView Control Center will display the follow-
ing message: SAFETY SHUTDOWN – MANUAL
RESTART, and cause of shutdown.
FIGURE 22 - AUXILIARY SAFETY SHUTDOWN
INPUT
LD04399

JOHNSON CONTROLS
18
FORM 160.79-PW2
ISSUE DATE: 01/31/2019
SECTION 2 - FIELD CONTROL MODIFICATIONS
The closure of a Momentary or Maintained N.O.
Switch or Relay Contacts will cause the unit to shut
down and display: SAFETY SHUTDOWN – MAN-
UAL RESTART and AUXILIARY SAFETY – CON-
TACTS CLOSED. The unit will not restart until the
contacts open and the keypad COMPRESSOR switch
is moved to the STOP-RESET position (“O”) and then
to the START (“t”) position.
EVAPORATOR FLOW SENSORS
The Thermal-type flow sensor interfaces with the
Microboard and Paddle/Differential Pressure type flow
sensor interfaces with the I/O board.
MICROBOARD
THERMAL-TYPE FLOW SENSOR
12
1
TB4
I/O BOARD
PADDLE-TYPE FLOW SENSOR
EVAPORATOR
J14-4
J14-5
+5V
FIGURE 23 - EVAPORATOR FLOW SENSORS
LD20686
For the program to read the appropriate inputs for the
flow sensor status, the actual flow sensor type used
must be entered at the keypad OPERATIONS Screen
using Service the Access Level. Enter "Analog" for
Thermal- type or "Digital" for paddle/DP type. Refer
to Unit Operation Manual Form 160.79‑O1.
When flow is sensed, the flow sensor contacts are
closed. Opening of the flow sensor contacts (no flow)
for 2 continuous seconds causes a cycling shutdown
displaying "Leaving Chilled Liquid - Flow Switch
Open". The flow sensor status is bypassed for the first
25 seconds of "System Prelube".
THERMAL TYPE FLOW SENSOR
When the Thermal-type flow switch is used, the flow
switch uses the cooling effect of liquid to sense flow.
When the flow of liquid is sensed, the relay output is
turned on applying >+4VDC to the microboard input
J14-4.
When no flow of liquid is sensed, the relay output is
turned off, this results in <1VDC to the microboard in-
put.
PADDLE/DP TYPE FLOW SENSOR
When Evaporator Water is flowing, the flow switch
contact will close. If the flow switch opens for 2 sec-
onds, the unit shuts down.
FIGURE 24 - PADDLE/DP TYPE FLOW SENSOR
LD20688
DIGITAL-TYPE FLOW SENSORS
If desired, a digital type chilled water flow sensor can
be applied. Paddle type – JCI F261MAL-V01C, max.
150 psi (YORK Part No. 024-26116-000); McDonnel-
Miller FS7-4W, max. 300 psi (YORK Part No. 024-
12144-000); Differential pressure type – Potter 1382,
max. 300 psi (YORK Part No. 025-30919-000) avail-
able at additional cost.

JOHNSON CONTROLS 19
FORM 160.79-PW2
ISSUE DATE: 01/31/2019
1. This drawing shows recommended eld control
wiring modications (by others) to the standard
OptiView Control Center Wiring Diagram. Also
refer to the following Wiring Diagram Form
160.79‑PW4 (Electro‑Mechanical Starter) and
Wiring Diagram 160.79‑PW5) (Modbus SSS/
VSD).
2. If more than one of these modications is to be
utilized with a particular unit, additional consid-
eration must be given to the application to insure
proper functioning of the control system. Consult
your Johnson Controls representative.
3. The additional controls and wiring for these modi-
cations are to be furnished and installed in the
eld (by others). (See Warning on page 2.)
4. The controls specied are recommended for use,
but other controls of equal specications are ac-
ceptable.
5. All wiring shall be in accordance with the latest
edition of the National Electrical Code, and ap-
plicable State and Local Codes.
6. Each 115VAC eld connected inductive load, i.e.
relay coil, motor starter coil, etc., shall have a tran-
sientsuppressorwired(byothers)inparallelwithits
coil, physically located at the coil. Spare transient
suppressors are furnished in a bag in the OptiView
Control Center.
7. For required eld wiring connections of the chilled
and condenser water pump contacts and water ow
switches, see Form 160.79‑PW1 Wiring Diagram
– Field Connections Water Pump Starters. As a
minimum, it is recommended that these contacts
be monitored by the plant control system to ensure
that water ows are maintained through the chiller
based on antifreeze logic provided in the OptiView
Control Center.
8. IMPORTANT: The chilled and condenser wa-
ter ow switches are safety controls. They must
be connected to prevent operation of the chill-
er whenever chilled/condenser water ow is
stopped. These are cycling shutdowns which will
allow the chiller to restart automatically when the
ow switch contacts close.
9. Do not apply voltage on eld wiring terminal
blocks TB4 and TB6 in YORK OptiView Control
Center, as 115VAC source is fed from terminals
1 and 2.
NOTES

5000 Renaissance Drive, New Freedom, Pennsylvania USA 17349 800-861-1001 Subject to change without notice. Printed in USA
Copyright © by Johnson Controls 2019 www.johnsoncontrols.com ALL RIGHTS RESERVED
Form 160.79-PW2 (119)
Issue Date: January 31, 2019
Supersedes: 160.79-PW2 (616)