Johnson Controls York VERSECON YSWD Series Owner's manual

035-21989-000
INSTALLATION, OPERATION & MAINTENANCE
VERSECON AIR CONDITIONING UNIT
Supersedes 145.05-NOM1 (1107) Form 145.05-NOM1(708)
MODEL YSWD & YSWU

JOHNSON CONTROLS
2
FORM 145.05-NOM1 (708)
This equipment is a relatively complicated apparatus.
During installation, operation, maintenance or service,
individuals may be exposed to certain components or
conditions including, but not limited to: refrigerants,
oils, 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 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
operating/service personnel. It is expected that this
individual possesses 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 will have read
and understood this document and any referenced
materials. This individual will also be familiar with and
comply with all applicable 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 areas of potential hazard:
CAUTION identifies a hazard which
could lead to damage to the machine,
damage to other equipment and/or
environmental pollution. Usually an
instruction will be given, together with
a brief explanation.
NOTE is used to highlight additional
information which may be helpful to
you.
DANGER indicates an imminently
hazardous situation which, if not
avoided, will result in death or serious
injury.
WARNING indicates a potentially
hazardous situation which, if not
avoided, could result in death or se-
rious injury.
External wiring, unless specified as an optional connection in the manufacturer’s product
line, is NOT to be connected inside the micro panel cabinet. Devices such as relays, switches,
transducers and controls may NOT be installed inside the micro panel. NO external wiring
is allowed to be run through the micro panel. All wiring must be in accordance with YORK’s
published specifications and must be performed ONLY by qualified YORK personnel. YORK
will not be responsible for damages/problems resulting from improper connections to the
controls or application of improper control signals. Failure to follow this will void the
manufacturer’s warranty and cause serious damage to property or injury to persons.

3
JOHNSON CONTROLS
FORM 145.05-NOM1 (708)
CHANGEABILITY OF THIS DOCUMENT
In complying with YORK’s policy for continuous
product improvement, the information contained in this
document is subject to change without notice. While
YORK makes no commitment to update or provide
current information automatically to the manual owner,
that information, if applicable, can be obtained by
contacting the nearest YORK Applied Systems office.
It is the responsibility of operating/service personnel
to verify the applicability of these documents to the
equipment in question. If there is any question in
the mind of operating/service personnel as to the
applicability of these documents, then prior to working
on the equipment, they should verify with the owner
whether the equipment has been modified and if current
literature is available.

JOHNSON CONTROLS
4
FORM 145.05-NOM1 (708)
CHANGEABILITY OF THIS DOCUMENT ...........................................................................................................3
TABLE OF CONTENTS .......................................................................................................................................4
LIST OF TABLES .................................................................................................................................................9
LIST OF FIGURES .............................................................................................................................................10
SECTION 1 – INTRODUCTION .........................................................................................................................11
ABOUT THIS MANUAL ..............................................................................................................................11
DESCRIPTION OF UNIT .............................................................................................................................11
NOMENCLATURE .......................................................................................................................................11
SECTION 2 – INSTALLATION ...........................................................................................................................13
APPROVALS ...............................................................................................................................................13
LIMITATIONS ...............................................................................................................................................13
UNIT INSPECTION ......................................................................................................................................13
LOCATION AND CLEARANCES ................................................................................................................14
RIGGING AND UNIT HANDLING ...............................................................................................................14
FACTORY-SUPPLIED PLENUM .................................................................................................................17
VIBRATION ISOLATORS ............................................................................................................................17
SEGMENTED UNIT ASSEMBLY ................................................................................................................17
REMOVE SHIPPING RESTRAINTS ...........................................................................................................18
ELECTRICAL DATA ....................................................................................................................................27
Field Power Wiring ..............................................................................................................................27
Disconnect ...........................................................................................................................................27
Electrical Service Sizing .....................................................................................................................27
MCA ................................................................................................................................................27
MOP ................................................................................................................................................27
Field Control Wiring ............................................................................................................................28
Pump Start .....................................................................................................................................28
Fan Start ........................................................................................................................................29
VAV Box Full Open ........................................................................................................................29
PHASE MONITOR .......................................................................................................................................29
DUCTING ....................................................................................................................................................29
Supply Air .............................................................................................................................................29
Return Air .............................................................................................................................................29
Ducted Return ...............................................................................................................................29
Free Return ....................................................................................................................................29
WATER PIPING ...........................................................................................................................................30
General .................................................................................................................................................30
Condenser Connections .....................................................................................................................30
Cooling Towers .............................................................................................................................31
Waterside Piping Arrangements ..................................................................................................31
Water Temperature Requirements ...............................................................................................31
Condensate Drain Connections .........................................................................................................31
TABLE OF CONTENTS

5
JOHNSON CONTROLS
FORM 145.05-NOM1 (708)
STATIC PRESSURE TRANSDUCER INSTALLATION (VAV UNITS ONLY) ..............................................31
Mounting Instructions .........................................................................................................................32
STATIC PRESSURE TRANSDUCER INSTALLATION (FLEXSYS UNITS ONLY) ....................................32
Installation Instructions ......................................................................................................................32
RETURN, OUTDOOR, SUPPLY AIR, AND MIXED AIR SENSORS ...........................................................33
Return Air Sensor ................................................................................................................................33
Supply Air Sensor ...............................................................................................................................33
Mixed Air Sensor .................................................................................................................................33
Outdoor Air Sensor .............................................................................................................................33
STEAM HEAT ..............................................................................................................................................33
Specification ........................................................................................................................................33
Steam Piping ........................................................................................................................................33
HOT WATER HEAT .....................................................................................................................................33
Specification ........................................................................................................................................33
Hot Water Piping ..................................................................................................................................34
ELECTRIC HEAT ........................................................................................................................................34
FILTERS ......................................................................................................................................................34
SECTION 3 – START-UP ...................................................................................................................................35
CRANKCASE HEATERS ............................................................................................................................35
PRE-STARTUP REQUIREMENTS ..............................................................................................................35
UNIT CHECKS – POWER APPLIED ..........................................................................................................36
Verifying Compressor Rotation ..........................................................................................................36
INITIAL START-UP ......................................................................................................................................36
Refrigerant Charge ..............................................................................................................................37
Subcooling ...........................................................................................................................................37
Superheat (R-22) ..................................................................................................................................37
Leak Checking .....................................................................................................................................37
SECTION 4 – MAINTENANCE ..........................................................................................................................39
GENERAL ...................................................................................................................................................39
PERIODIC MAINTENANCE – MONTHLY ...................................................................................................39
Filters ....................................................................................................................................................39
Linkages ...............................................................................................................................................39
Compressors .......................................................................................................................................39
Oil Analysis ..........................................................................................................................................39
Fan Bearing Lubrication .....................................................................................................................39
Recommended Lubricant for Fan Bearings ......................................................................................39
PERIODIC MAINTENANCE – THREE TO SIX MONTHS .............................................................................................40
Motor Bearing Lubrication ..................................................................................................................40
Belt Tension .........................................................................................................................................40
TABLE OF CONTENTS

JOHNSON CONTROLS
6
FORM 145.05-NOM1 (708)
PERIODIC MAINTENANCE – YEARLY ......................................................................................................40
Entire Unit Inspection .........................................................................................................................40
Sheave Alignment ...............................................................................................................................40
Belts ......................................................................................................................................................41
Belt Replacement ................................................................................................................................41
Belt Tensioning: ...................................................................................................................................41
Filter Drier Replacement .....................................................................................................................41
Supply Fan ...........................................................................................................................................41
Fan Motor .............................................................................................................................................42
Fan Shaft Bearings ..............................................................................................................................42
Mounting Details ...........................................................................................................................42
Bearing Locking Devices .............................................................................................................43
Condenser Coil Cleaning ....................................................................................................................43
WATER PRESSURE DROP TABLES .........................................................................................................44
SECTION 5 – SEQUENCE OF OPERATION ....................................................................................................47
ON / OFF .....................................................................................................................................................47
SUPPLY FAN OPERATION .........................................................................................................................47
Constant Volume Fan Operation ........................................................................................................47
VAV Fan Operation ..............................................................................................................................48
Communicated VFD Speed Input .......................................................................................................48
FLEXSYS DEW POINT CONTROL ............................................................................................................49
Sequence of Operation .......................................................................................................................49
ECONOMIZER OPERATION ......................................................................................................................49
Sequence of Operation .......................................................................................................................50
Waterside Economizer ..................................................................................................................50
Outdoor Air Economizer ...............................................................................................................50
CONDENSER WATER VALVE OPERATION ..............................................................................................51
Sequence of Operation .......................................................................................................................51
CONDENSER WATER BYPASS .................................................................................................................51
Sequence of Operation .......................................................................................................................51
MECHANICAL COOLING OPERATION .....................................................................................................51
Sequence of Operation .......................................................................................................................52
Supply Air Temperature Control ..................................................................................................52
Return Air Temperature Control ..................................................................................................52
Dew Point Temperature Control (FlexSys Units) .......................................................................52
Coil Leaving Temperature Control (FlexSys Units) ...................................................................52
Compressor Analog Output .........................................................................................................52
Compressor Staging .....................................................................................................................53
Lead Lag Operation .............................................................................................................................54
Two Compressor Units .................................................................................................................54
Four Compressor Units ................................................................................................................54
TABLE OF CONTENTS

7
JOHNSON CONTROLS
FORM 145.05-NOM1 (708)
FLEXSYS BYPASS DAMPER CONTROL ..................................................................................................54
Sequence of Operation .......................................................................................................................54
COMPRESSOR SAFETY CONTROL OPERATION ...................................................................................54
Compressor High Pressure (Fault / Alarm) .......................................................................................54
Compressor Low Pressure (Fault / Alarm) ........................................................................................55
Compressor Low Suction Pressure Control .....................................................................................55
High Pressure Switch ..........................................................................................................................55
Compressor Motor Protector .............................................................................................................55
HEATING OPERATION ...............................................................................................................................55
Sequence of Operation .......................................................................................................................55
Supply Air Temperature Control ..................................................................................................55
Return Air Temperature Control ..................................................................................................56
Staged Heat Operation .................................................................................................................56
Tristate Modulated Heat ...............................................................................................................57
SECTION 6 – USER INTERFACE CONTROL CENTER ...................................................................................59
KEYPAD ......................................................................................................................................................59
POWER UP BANNER SCREEN .................................................................................................................59
RUN STATUS SCREEN ..............................................................................................................................59
ALARM SCREEN ........................................................................................................................................60
FAULT SCREEN ..........................................................................................................................................60
INPUT ..........................................................................................................................................................61
Analog In ..............................................................................................................................................61
Digital In ...............................................................................................................................................61
OUTPUTS ....................................................................................................................................................61
Analog Out ...........................................................................................................................................61
PID Loop Out ........................................................................................................................................61
Digital Out ............................................................................................................................................61
SETPOINTS .................................................................................................................................................62
FORCED OUTPUTS ....................................................................................................................................64
SETTING DATE AND TIME .........................................................................................................................65
DAILY SCHEDULE ......................................................................................................................................67
HOLIDAY SCHEDULE ................................................................................................................................68
OVERRIDE SCHEDULE .............................................................................................................................68
COMMUNICATIONS ...................................................................................................................................69
Communication Wiring .......................................................................................................................69
Network Baud Rate ..............................................................................................................................69
Device Object Instance (DE) ...............................................................................................................70
TABLE OF CONTENTS

JOHNSON CONTROLS
8
FORM 145.05-NOM1 (708)
SECTION 7 – PARAMETER DESCRIPTIONS AND OPTIONS ......................................................................107
SECTION 8 – SERVICE ...................................................................................................................................113
ANALOG INPUTS .....................................................................................................................................113
Temperature Sensors ........................................................................................................................113
Duct Pressure Transducer ................................................................................................................113
Coil Pressure Drop (FlexSys Units Only) ........................................................................................114
Discharge Pressure Transducer ......................................................................................................114
Suction Pressure Transducer ...........................................................................................................114
Humidity Sensor (FlexSys Units Only) ............................................................................................114
FAULTS AND ALARMS ............................................................................................................................115
Compressor High Pressure (Fault / Alarm) .....................................................................................115
Compressor Low Pressure (Fault / Alarm) ......................................................................................115
Dirty Filter (Alarm) .............................................................................................................................116
Duct High Static (Fault / Alarm) ........................................................................................................116
External Safety ...................................................................................................................................116
Fan Failure (Alarm) ............................................................................................................................116
Freeze (Fault / Alarm) ........................................................................................................................117
CONTROL BOARD CONFIGURATION ....................................................................................................118
Main Control Board ...........................................................................................................................118
Auxiliary Control Board ....................................................................................................................119
WIRING DIAGRAMS .................................................................................................................................124
Constant Volume, Variable Air Volume ............................................................................................124
CV, VAV, FlexSys ................................................................................................................................125
CV, VAV, FlexSys ................................................................................................................................126
FlexSys ...............................................................................................................................................127
TABLE OF CONTENTS

9
JOHNSON CONTROLS
FORM 145.05-NOM1 (708)
LIST OF TABLES
TABLE 1 – ACRONYM CHART .........................................................................................................................11
TABLE 2 – VOLTAGE LIMITATIONS ................................................................................................................13
TABLE 3 – OPERATING LIMITATIONS ............................................................................................................13
TABLE 4 – ACCESS REQUIREMENTS ............................................................................................................14
TABLE 5 – WEIGHTS ........................................................................................................................................15
TABLE 6 – DATA TABLE ...................................................................................................................................19
TABLE 7 – REFRIGERANT CHARGE DATA ....................................................................................................23
TABLE 8 – FAN MOTOR DATA .........................................................................................................................28
TABLE 9 – COMPRESSOR MOTOR DATA ......................................................................................................28
TABLE 10 – SETSCREW TORQUES ................................................................................................................35
TABLE 11 – TEMPERATURE/PRESSURE CHART – REFRIGERANT R-22 ...................................................38
TABLE 12 – FAN BEARING – LUBRICATION INTERVALS ............................................................................39
TABLE 13 – BELT TENSION DATA ..................................................................................................................40
TABLE 14 – WINDOW OF OPERATION, COMPRESSOR STAGING ..............................................................52
TABLE 16 – SETPOINT SCREEN PARAMETERS ...........................................................................................63
TABLE 17 – FORCED ON PARAMETERS .......................................................................................................64
TABLE 18 – BACnet MS/TP points ..................................................................................................................70
TABLE 19 – N2 POINTS LIST .........................................................................................................................102
TABLE 20 – DEFINITIONS ..............................................................................................................................107
TABLE 21 – TEMPERATURE SENSOR RESISTANCE ..................................................................................113
TABLE 22 – VAV DUCT STATIC PRESSURE TRANSDUCER ......................................................................113
TABLE 23 – FLEXSYS DUCT STATIC PRESSURE TRANSDUCER .............................................................113
TABLE 24 – COIL PRESSURE DROP (FLEXSYS) ........................................................................................114
TABLE 25 – REFRIGERANT PRESSURE TRANSDUCERS .........................................................................114
TABLE 26 – HUMIDITY SENSOR OUTPUT ...................................................................................................115
TABLE 27 – CONSTANT VOLUME / VARIABLE AIR VOLUME MAIN CONTROL BOARD * .......................120
TABLE 28 – CONSTANT VOLUME / VARIABLE AIR VOLUME EXPANSION CONTROL BOARD * ...........121
TABLE 29 – FLEXSYS MAIN CONTROL BOARD * .......................................................................................122
TABLE 30 – FLEXSYS EXPANSION CONTROL BOARD * ...........................................................................123

JOHNSON CONTROLS
10
FORM 145.05-NOM1 (708)
LIST OF FIGURES
FIG. 1 – RECOMMENDED SERVICE AND MAINTENANCE CLEARANCE ....................................................14
FIG. 2 – SHIPPING RESTRAINT LOCATIONS .................................................................................................18
FIG. 3 – SHEAVE ALIGNMENT .........................................................................................................................40
FIG. 4 – BELT TENSIONING GAUGE ...............................................................................................................41
FIG. 5 – KEYPAD / DISPLAY .............................................................................................................................59
FIG. 6 – COMMUNICATION WIRING ................................................................................................................69
FIG. 7 – MAIN CONTROL BOARD PIN POSITIONS ......................................................................................118
FIG. 8 – AUXILIARY CONTROL BOARD PIN POSITIONS ............................................................................119
FIG. 9 – MAIN CONTROL BOARD .................................................................................................................119
FIG. 10 – AUXILIARY CONTROL BOARD ......................................................................................................119
FIG. 11 – ELEMENTARY CONTROL WIRING DIAGRAM, YWSU- ALL OPTIONS .......................................124
FIG. 12 – ELEMENTARY CONTROL WIRING DIAGRAM, YSWU .................................................................125
FIG. 13 – ELEMENTARY POWER WIRING DIAGRAM, YSWU .....................................................................126
FIG. 14 – ELEMENTARY CONTROL WIRING DIAGRAM, YSWU DOWNFLOW ..........................................127

11
JOHNSON CONTROLS
FORM 145.05-NOM1 (708)
1 2 3 4 5 6 7
U - Upflow
0
D - Downflow for FlexSys
W - Water Cooled
A - Air Cooled
C - Chilled Water Cooled
S - Self-contained
Y - York
39
Nominal TonnageBase Product Type
BASE MODEL NUMBER
YSWU039 - YORK Versacon Water Cooled, Upflow, 39 Nominal Tons
YSWU - YORK Floor X Floor, Water Cooled, Upflow
YSAU - YORK Floor X Floor, Air Cooled, Upflow
YSCU - YORK Floor X Floor, Chilled Water Cooled, Upflow
YSWD - YORK Floor X Floor, Water Cooled, Downflow
YSAD - YORK Floor X Floor, Air Cooled, Downflow
YSCD - YORK Floor X Floor, Chilled Water, Downflow
ABOUT THIS MANUAL
This manual applies to Versecon Models YSWD/
YSWU012 to YSWD/YSWU090. This manual pro-
vides specific instructions for installation, owner main-
tenances, and troubleshooting.
Due to the dedication of continuous product improve-
ment and enhancements, the information provided is
subject to change without notice
DESCRIPTION OF UNIT
Versecon, the indoor vertical self-contained air con-
ditioner is the ultimate solution addressing the energy
efficiency, reliability, indoor air quality, and sound
concerns for commercial, industrial and institutional
buildings. Versecon offers a simple system design,
increases system redundancy by providing individual
air conditioning systems per floor, lowers maintenance
costs, eases operation and maintenance and provides the
lowest life cycle cost available. Based on these features,
the self-contained unit has surpassed the traditional
chillers, air handlers and rooftop systems and is now
the system of choice.
Models YSWD/YSWU012 to YSWD/YSWU090 are
factory assembled, refrigerant charged and tested, wa-
ter-cooled packaged air conditioning units designed for
ducted applications.
Each unit contains multiple hermetic scroll compres-
sors, water cooled condensers, multi-circuit evaporator,
thermal expansion valves, interconnecting refrigerant
piping, plenum supply fan, belt drive, fan motor, pleated
filters and all necessary operating and required safety
controls to operate the unit.
All rigging, installation, power and control wiring ex-
ternal to the unit, and condenser water and condensate
piping are the responsibility of the installer.
NOMENCLATURE
TABLE 1 – ACRONYM CHART
ACRONYM TEXT
AO Analog Output
AFS Air Flow Switch
DHS Duct High Static Switch
DSP Duct High Pressure Sensor
DO Digital Output
IN Universal Input
LCD Logic Controller Display
MSF Supply Fan Relay
OLSF Supply Fan Overload
PM Phase Monitor
PWS Power Supply
RSF Supply Fan Relay
S Toggle Switch
T Transformer
VFD Variable Frequency Drive
SAT Supply Air Temp
MAT Mixed Air Temp
AFS Air Flow Switch
DHS Duct High Static
RAT Return Air Temp
1
SECTION 1 – INTRODUCTION

12 JOHNSON CONTROLS
FORM 145.05-NOM1 (708)
THIS PAGE INTENTIONALLY LEFT BLANK

13
2
JOHNSON CONTROLS
FORM 145.05-NOM1 (708)
APPROVALS
Designed certified by ETL for indoor installation
only.
LIMITATIONS
The installation of this unit must conform to local
building codes as well as the National Electrical Code
ANSI/NFPA No. 70 – latest edition.
Refer to Table 2 for voltage limitations and Table 3 for
operating limitations.
If the VAV boxes in the conditioned
space have hydronic heating coils
installed, it is the responsibility of the
installing contractor to take appropri-
ate measures to protect the hydronic
coils against low unit supply air tem-
peratures that could result in the freeze
up and rupture of the coils.
UNIT INSPECTION
Immediately upon receiving the unit, it should be
inspected for possible damage which may have
occurred during transit. If damage is evident, it should
be noted on the carrier’s freight bill. A written request
for inspection by the carrier’s agent should be made at
once. See “Instruction” manual Form 50.15-NM for
more information and details.
To ensure warranty coverage, this
equipment must be commissioned
and serviced by an authorized YORK
service mechanic or a qualified ser-
vice person experienced in packaged
rooftop installation. Installation must
comply with all applicable codes, par-
ticularly in regard to electrical wiring
and other safety elements such as relief
valves, HP cut-out settings, design
working pressures and ventilation re-
quirements consistent with the amount
and type of refrigerant charge.
Lethal voltages exist within the control
panels. Before servicing, open and tag
all disconnect switches.
TABLE 2 – VOLTAGE LIMITATIONS
UNIT POWER SUPPLY VOLTAGE VARIATIONS
MINIMUM VOLTS MAXIMUM VOLTS
208-3-60 180 228
230-3-60 207 253
480-3-60 415 506
575-3-60 518 632
TABLE 3 – OPERATING LIMITATIONS
MINIMUM MAXIMUM
ENTERING AIR DX COIL
– DRY BULB 68.0° F 90.0° F
ENTERING AIR DX COIL
– WET BULB 57.0° F 72.0° F
DC COOLING COIL AIRFLOW
VELOCITY
400
FPM
600
FPM
CONDENSER WATER FLOW 2.0
GPM/TON
3.0
GPM/TON
ENTERING COND. WATER
TEMP WITH WATER
ECONOMIZER
50.0° F 115.0° F
ENTERING COND. WATER
TEMP W/O WATER
ECONOMIZER
55.0° F 115.0° F
STEAM HEAT – STEAM
PRESSURE 5 PSIG 15 PSIG
HOT WATER HEAT ENTERING
WATER TEMP 140.0° F 160.0° F
SECTION 2 – INSTALLATION

14 JOHNSON CONTROLS
FORM 145.05-NOM1 (708)
LOCATION AND CLEARANCES
The following guidelines should be used to select a
suitable location for the unit installation:
• The unit is designed for indoor installation only
• Verify the floor or foundation is level. For proper
unit operation the unit should be level within a
1/16” side to side and 1/8” front to back tolerance.
Failure to level the unit properly could result in
condensate management problems, such as stand-
ing water inside the unit.
For installation, service and maintenance access, the
following clearances should be followed. Minimum
clearances required by local, state, or national codes,
such as NEC take precedence over those listed in Figure
1 and Table 4. Clearance is required to allow room for
side filter access, mechanical cleaning of the condenser
tubes and water economizer coil, access to expansion
valves and other control components and to allow for
possible fan shaft or compressor removal. Additional
clearance should be considered for component
replacement such as condenser, evaporator, water
economizer coil and supply fan. Even though there is
no vertical clearance specification listed clearance above
the unit may be advantages during change out of any of
the above components.
FIG. 1 – RECOMMENDED SERVICE AND
MAINTENANCE CLEARANCE
RIGGING AND UNIT HANDLING
Units are shipped with a protective covering, which
should remain in place while the unit is being moved
to its final location.
Never allow any part of the unit to fall
during unloading or moving as this
may result in serious damage.
Unit weights are listed in Table 5 in this manual. These
weights must be referred to when selecting a crane for
rigging. Contact your Johnson Controls Sales Office if
you have any questions regarding unit weights.
Ensure lifting equipment capacity
exceeds unit weight by an adequate
safety factor to prevent injury, death,
or unit damage.
TABLE 4 – ACCESS REQUIREMENTS
AREA DISTANCE COMPONENT ACCESSED
UNIT FRONT 42"
MOST ELECTRICAL AND POW-
ER COMPONENTS, VFD, FAN
BELT ADJUSTMENTS, GREAS-
ING BOTH BEARINGS, FAN
WHEEL, FAN MOTOR, SHAFT
PULL, ETC.
UNIT REAR 18" FILTER ACCESS, COIL ACCESS,
ETC.
UNIT LEFT 24" COMPRESSOR A AND B, RE-
FRIGERANT COMPONENTS
UNIT RIGHT 24" COMPRESSOR C AND D, RE-
FRIGERANT COMPONENTS
42"
LEFT
FRONT
RIGHT
BACK
24"
24"
18"
LDO10371
Installation

15
2
JOHNSON CONTROLS
FORM 145.05-NOM1 (708)
TABLE 5 – WEIGHTS
UNIT WEIGHTS 012 016 021 025 032 039 048 050 055 060 072 079 090
COOLING COIL SECTION
CABINET 451 456 461 466 529 593 656 818 720 823 911 1135 1140
EVAPORATIVE COIL 168 206 244 282 350 418 486 528 554 592 694 761 855
WATERSIDE ECONOMIZER SECTION
4 ROW, 12 FPI 267 305 343 381 457 549 627 679 705 743 855 932 1,026
WATER WEIGHT 35 47 58 70 91 112 133 147 154 168 201 221 252
HEATING SECTION
HOT WATER HEAT 63 83 105 126 163 201 238 263 276 301 359 395 451
WATER WEIGHT 11 14 18 22 28 35 41 46 48 52 62 68 78
STEAM 63 83 105 126 163 201 238 263 276 301 359 395 451
ELECTRIC HEAT 21 21 21 21 21 21 42 42 42 42 42 42 42
RETURN AIR SECTION
FILTERS – 4" 30% 182 182 182 182 213 244 276 352 306 352 401 477 477
FAN SECTION
CABINET 451 456 461 466 529 593 656 818 720 823 911 1135 1140
FAN AND BASE
18" 203 203 203 203 - - - - - - - - -
20" 213 213 213 213 213 - - - - - - - -
22" - - - - 233 233 - - - - -
24" - - - - - 285 285 - - - - - -
27" - - - - - 428 428 - 428 - - - -
30" - - - - - - - 472 - 472 - - -
33" - - - - - - - 598 - 598 598 - -
36" - - - - - - - - - - 685 685 685
40" - - - - - - - - - - - 920 920
44" - - - - - - - - - - - - -
MOTOR HP
2 64 - - - - - - - - - - - -
3 100 100 - - - - - - - - - - -
5 117 117 117 117 - - - - - - - - -
7.5 194 194 194 194 194 194 - 194 - - - - -
10 213 213 213 213 213 213 213 213 213 213 213 213 -
15 - - 326 326 326 326 326 326 326 326 326 326 326
20 - - - - 368 368 368 368 368 368 368 368 368
25 - - - - - - 495 495 495 495 495 495 495
30 - - - - - - - - - 519 519 519 519
40 - - - - - - - - - - 602 602 602
50 - - - - - - - - - - - - -
VARIABLE FREQUENCY DRIVE
2 5 - - - - - - - - - - - -
3 8 8 - - - - - - - - - - -
5 13 13 13 13 - - - - - - - - -
7.5 51 51 51 51 51 51 - 51 - - - - -
10 51 51 51 51 51 51 51 51 51 51 51 51 -
15 - - 66 66 66 66 66 66 66 66 66 66 66
20 - - - - 66 66 66 66 66 66 66 66 66
25 - - - - - - 106 106 106 106 106 106 106
30 - - - - - - - - - 106 106 106 106
40 - - - - - - - - - - 106 106 106
50 - - - - - - - - - - - - -

16 JOHNSON CONTROLS
FORM 145.05-NOM1 (708)
TABLE 5 – WEIGHTS (CONT.)
UNIT
WEIGHTS
WATER
WEIGHT 012 016 021 025 032 039 048 050 055 060 072 079 090
COMPRESSOR/CONDENSER
(1) 4 & (1) 7 26 333 333 - - - - - - - - - - -
(1) 4 & (1) 10 34 358 358 - - - - - - - - - - -
(1) 7 & (1) 10 41 434 434 434 - - - - - - - - - -
(1) 7 & (1) 12 46 456 456 456 - - - - - - - - - -
(1) 7 & (1) 15 53 - 597 597 597 - - - - - - - - -
(1) 10 & (1) 15 60 - - 673 673 673 - - - - - - - -
(1) 12 & (1) 15 65 - - 694 694 694 - - - - - - - -
(1) 12 & (1) 20 77 - - - 856 856 - - - - - - - -
(1) 12 & (1) 25 89 - - - 905 905 - - - - - - - -
(1) 15 & (1) 25 96 - - - - 1,046 - - - - - - - -
(2) 7 & (2) 10 82 - - - - - 954 - - - - - - -
(2) 7 & (2) 12 91 - - - - - 1,016 1,016 - - - - - -
(4) 10 96 - - - - - 1,144 1,144 - - - - - -
(2) 7 & (2) 15 106 - - - - - 1,311 1,311 1,311 - - - - -
(4) 12 115 - - - - - 1,232 1,232 1,232 1,229 - - - -
(2) 10 & (2) 15 120 - - - - - - 1,483 1,483 1,490 1,483 - - -
(2) 12 & (2) 15 130 - - - - - - - 1,527 1,534 1,527 - - -
(4) 15 144 - - - - - - - 1,822 1,839 1,822 1,839 - -
(2) 12 & (2) 20 154 - - - - - - - - - 1,899 1,968 - -
(2) 15 & (2) 20 168 - - - - - - - - - 2,194 2,273 2,273 -
(2) 12 & (2) 25 178 - - - - - - - - - - 2,111 2,111 2,111
(2) 15 & (2) 25 192 - - - - - - - - - - 2,417 2,417 2,417
(2) 20 & (2) 25 216 - - - - - - - - - - - 2,851 2,851
(4) 25 240 - - - - - - - - - - - 2,994 2,994
(2) 25 & (4) 15 264 - - - - - - - - - - - - -
(6) 20 288 - - - - - - - - - - - - -
(2) 25 & (4) 20 312 - - - - - - - - - - - - -
(2) 20 & (4) 25 336 - - - - - - - - - - - - -
(6) 25 360 - - - - - - - - - - - - -
DISCHARGE PLENUM
FACTORY INSTALLED 492 492 492 492 560 627 695 759 763 759 846 1,073 1,073
Determine the approximate center of gravity for lifting
safety before lifting the unit.
Always test-lift the unit to determine the exact unit
balance and stability before hoisting it to the installation
location.
Units are provided with lifting lugs for rigging with a
crane. If the units are lifted by crane, protection against
chaffing damage by slings or cable must be provided,
and spreader bars must be used across the top of the
cabinet to prevent any structural damage to the frame.
Installation

17
2
JOHNSON CONTROLS
FORM 145.05-NOM1 (708)
The unit base frame will accept dollies or Johnson bars
for transporting the unit. Furniture dollies can be placed
at both ends of the chassis or at one end, and a Johnson
bar used at the other end for maneuvering.
Do not attempt to install dollies in the
center of the unit. Units can become
unstable and tip over causing injury.
Do not use hooks to lift unit or hook
into open channels to lift unit. This
could cause unit damage.
FACTORY-SUPPLIED PLENUM
If the unit is provided with a factory plenum for field
mounting, a forklift, slings or other suitable lifting
means is required to position the plenum above the unit.
Prior to placing the plenum on the top of the unit verify
the foam rubber gasket is in place around the perimeter
of the unit top. Align the plenum front with the control
panel side of the unit. Carefully set the plenum and
attach using the mounting hardware provided with the
plenum. Treat field-cut holes to prevent fiberglass from
entering the air stream.
Do not remove more than two non-
adjacent panels at one time, failure
to do so will cause the plenum frame
to collapse and may cause personal
injury.
The plenum insulation strip must be
applied properly to prevent air bypass
around the plenum
VIBRATION ISOLATORS
Each Versecon unit includes 1-inch high vibration
isolation pads composed of 1/2 inch thick cork
sandwiched between ¼ inch thick neoprene pads.
The vibration isolators should be placed with the
2–inch width of the isolator supporting the 2-inch deep
frame.
For units with 6 pads (12, 16, 21, and 25 ton units) the
pad locations should be one near each of the corners and
one on the front and back of the unit near the center.
For units having more than six pads the pads should
be placed at each corner and then distributed evenly
between the front and back and sides. The 32 and 39
ton units have 8 pads, the 48 ton unit has 12 pads, the
55, 63, 73, 50, and 60 ton has 16 pads, the 72, 79, and
90 ton units have 20 pads.
SEGMENTED UNIT ASSEMBLY
For ease of handling and transport in a freight elevator
the Versecon product can be split and shipped in three
segments. The unit was assembled and tested at the
factory prior to shipment. The sections were then
separated for shipment. The three segments are as
follows:
• Compressor / Condenser / Coil section
• Control and supply air fan section
• Filter or filter and hydronic heat section (op-
tional)
Refer to publication Form 145.05-FA1 for detailed
instruction on how to reassemble the unit.

18 JOHNSON CONTROLS
FORM 145.05-NOM1 (708)
REMOVE SHIPPING RESTRAINTS
Mechanical restraints are used to secure the spring
mounted supply fan during shipment (see Figure 2).
Restraints and shipping blocks must
be removed after unit has been set in
its final location.
TIE DOWN BOLTS
TYP FOUR PLACES
SUPPLY FAN ASSEMBLY
DETAIL A
SCALE 1:4
A
FIG. 2 – SHIPPING RESTRAINT LOCATIONS
LD12274
Installation

19
2
JOHNSON CONTROLS
FORM 145.05-NOM1 (708)
DATA 012 016 021 025 032 039 048
Capacity
Range
Min. capacity (tons) 10 15 20 25 30 35 40
Max. capacity (tons) 20 25 30 35 45 55 65
Airflow
Range
Min. VAV design CFM 3,300 4,400 5,600 6,700 8,700 10,700 12,700
Max.VAV design & operating CFM 5,000 6,700 8,400 10,000 13,000 16,000 19,000
Cabinet
Dimensions
Depth (excluding return section) 70 70 70 70 70 70 70
Length 52 52 52 52 64 76 88
Height (excluding discharge plenum) 79 79 79 79 79 79 79
Box type M1 M1 M1 M1 M2 M3 M4
EER Based on ARI 340/360-93 15.7 15.7 14.5 13.9 13.8 14.2 13.6
Cooling Coil
Section
Face Area 8.3 11.1 13.9 16.7 21.7 26.7 31.7
Rows–12 FPI* 4 or 6 4 or 6 4 or 6 4 or 6 4 or 6 4 or 6 4 or 6
Waterside
Econo
Section
Face Area 8.3 11.1 13.9 16.7 21.7 26.7 31.7
Rows–12 FPI 2 or 4 2 or 4 2 or 4 2 or 4 2or 4 2 or 4 2 or 4
Heating
Section
Hot Water Heat–Face Area 8.3 11.1 13.9 16.7 21.7 26.7 31.7
Rows–10 FPI 1 or 2 1 or 2 1 or 2 1 or 2 1 or 2 1 or 2 1 or 2
Electric Heat–kW TBD TBD TBD TBD TBD TBD TBD
Steam–Face Area 8.3 11.1 13.9 16.7 21.7 26.7 31.7
Rows–8 FPI 1 1 1 1 1 1 1
Return Air
Section
Filter Type 2” or 4” PLEATED, 12” CARTRIDGE
Filter Area (ft2) 18.3 18.3 18.3 18.3 24.4 28.5 32.5
20 x 20 Filter Quantity 3 3 3 3 9 3 12
20 x 25 Filter Quantity 3 3 3 3 - 6 -
Pre-Filter 2” or 4 2” or 4 2” or 4 2” or 4 2” or 4 2” or 4 2” or 4
Efficiency (%) 30 to 95 30 to 95 30 to 95 30 to 95 30 to 95 30 to 95 30 to 95
Final-Filter 4” or 12” 4” or 12” 4” or 12” 4” or 12” 4” or 12” 4” or 12” 4” or 12”
Efficiency (%) 65–95 65–95 65–95 65–95 65–95 65–95 65–95
Fan Section Type AIRFOIL PLENUM FAN (SWSI)
Quantity–Dia. (in): standard capacity 1–18 1–18 1–18 1–18 1–20 1–24 1–24
Quantity–Dia. (in): high capacity 1–20 1–20 1–20 1–20 1–24 1–27 1–27
Motor HP range 1.0–20.0 1.0–20.0 1.0–20.0 1.0–20.0 1.5–20.0 2.0–20.0 2.0–20.0
Compressor
Section
Type SCROLL
Quantity 2 2 2 2 2 4 4
Stages–VAV systems 3 3 3 3 3 4–6 4–6
TABLE 6 – DATA TABLE
Due to �
* Aluminum fins standard. ** M-Available Modular Construction, N- for New Construction.
Continued on next page
PHYSICAL & ELECTRICAL DATA

20 JOHNSON CONTROLS
FORM 145.05-NOM1 (708)
DATA 050 055 060 072 079 090
Capacity
Range
Min. capacity (tons) 40 50 55 65 70 80
Max. capacity (tons) 70 75 80 100 105 120
Airflow Range Min. VAV design CFM 14,000 14,700 16,000 19,100 21,000 24,000
Max.VAV design & operating CFM 21,000 22,000 24,000 28,700 31,500 36,000
Cabinet
Dimensions
Depth (excluding return section) 84 70 84 84 96 96
Length 84 100 84 98 120 120
Height (excluding discharge plenum) 99 79 99 99 99 99
Box type N1 M5 N1 N2 N3 N3
EER Based on ARI 340/360-93 14.1 13.6 14.2 14.6 14.5 14.3
Cooling Coil
Section
Face Area 35 36.7 40 47.8 52.5 60.0
Rows–12 FPI* 4 or 6 4 or 6 4 or 6 4 or 6 4 or 6 4 or 6
Waterside
Econo
Section
Face Area 35 36.7 40 47.8 52.5 60.0
Rows–12 FPI 2 or 4 2 or 4 2 or 4 2 or 4 2 or 4 2 or 4
Heating
Section
Hot Water Heat–Face Area 35 36.7 40 47.8 52.5 60.0
Rows–10 FPI 1 or 2 1 or 2 1 or 2 1 or 2 1 or 2 1 or 2
Electric Heat–kW TBD TBD TBD TBD TBD TBD
Steam–Face Area 35 36.7 40 47.8 52.5 60
Rows–8 FPI 1 1 1 1 1 1
Return Air
Section
Filter Type 2” or 4” PLEATED, 12” CARTRIDGE
Filter Area (ft2) 40.8 36.7 40.8 48.9 62.5 62.5
20 x 20 Filter Quantity - 6 - 8 8 8
20 x 25 Filter Quantity 12 6 12 8 12 12
Pre-filter 2” or 4 2” or 4 2” or 4 2” or 4 2” or 4 2” or 4
Efficiency (%) 30 to 95 30 to 95 30 to 95 30 to 95 30 to 95 30 to 95
Final-Filter 4” or 12” 4” or 12” 4” or 12” 4” or 12” 4” or 12” 4” or 12”
Efficiency (%) 65–95 65–95 65–95 65–95 65–95 65–95
Fan Section Type AIRFOIL PLENUM FAN (SWSI)
Quantity–Dia. (in): standard capacity 1–30 1–27 1–30 1-33 1-36 1-36
Quantity–Dia. (in): high capacity 1–33 n/a 1–33 1-36 1-40 1-40
Motor HP range 3.0–30.0 3.0–20.0 3.0–30.0 3.0-40.0 5.0-50.0 5.0-50.0
Compressor
Section
Type SCROLL
Quantity 4 4 4 4 4 4
Stages–VAV systems 4–6 4–6 4–6 4–6 4–6 4–6
Condenser
Section
Type WATER-COOLED, MECHANICALLY CLEANABLE
Quantity 4 4 4 4 4 4
GPM Range 2.0 to 3.0 GPM/Ton 100–150 110–165 120–180 144-216 158-237 180-270
TABLE 6 – DATA TABLE (CONTINUED)
Due to �
* Aluminum fins standard. ** M-Available Modular Construction, N- for New Construction.
Installation