Johnson Controls VB09 Installation and operating instructions

LD27626
R-410A
ISSUE DATE:
August 30, 2018
HIGH EFFICIENCY VSCS SERIES
VERTICAL STACKED WATER SOURCE HEAT PUMP
CABINET MODEL VB/VM/VS09–36
AND
CHASSIS MODEL VSCS09–36
INDOOR PACKAGED EQUIPMENT
Installation, Operation, and Maintenance Supersedes: 145.18-IOM1 (115) Form 145.18-IOM1 (818)

2
FORM 145.18-IOM1
ISSUE DATE: 8/30/2018
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 others 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 the manufacturer's published specications and must be performed only by a qualied
electrician. The manufacturer 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.
WARNING: This product can expose you to chemicals including formaldehyde, which is known
to the state of California to cause cancer. For more information, go to www.P65Warnings.ca.gov.

3
FORM 145.18-IOM1
ISSUE DATE: 8/30/2018
CHANGEABILITY OF THIS DOCUMENT
In complying with the manufacturer's’ policy for con-
tinuous product improvement, the information con-
tained in this document is subject to change without
notice. There is 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 service office.
It is the responsibility of rigging, lifting, and operating/
service personnel to verify the applicability of these
documents to the equipment. If there is any question
regarding the applicability of these documents, rigging,
lifting, and operating/service personnel should verify
whether the equipment has been modified and if current
literature is available from the owner of the equipment
prior to performing any work on the equipment.
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 in-
formation and any other changes in spelling, grammar
or formatting are not included.
MANUAL DESCRIPTION FORM NUMBER
Vertical Stacked Heat Pump Start-Up and Performance Checklist 145.18-CL1
Vertical Stacked Water Source Heat Pump Heating and Cooling Data Record Sheet 145.18-CL2
ASSOCIATED LITERATURE

4
FORM 145.18-IOM1
ISSUE DATE: 8/30/2018
CABINET NOMENCLATURE
1, 2 3, 4 5 6 7 8 9 10 11, 12 13 14 15
VB 12 M 1 D E A 2 2T 4 0 C
RISER ARRANGEMENT
1 = Right Hand Risers
2 = Left Hand Risers
3 = Back Risers
4 = Right Hand Risers with Cover
5 = Left Hand Risers with Cover
6 = Back Risers with Cover
BLOWER OPTIONS
A = PSC Blower
B = Hi-Static PSC Blower
E = ECM Blower
F = Hi-Static ECM Blower
G = ECM with Continuous Low Speed
H = Hi-Static ECM with Continuous Low Speed
DESIGN SERIES
C = Current Generation
UNIT CAPACITY
09 = 0.75 TON 24 = 2 TON
12 = 1 TON 30 = 2.5 TON
15 = 1.25 TON 36 = 3 TON
18 = 1.5 TON
CONTROL OPTIONS
M = Microprocessor (MP) Control with 2-Speed
Unit Mounted Switch
2 = MP Control with 2-Speed Thermostat Control
3 = MP Control with 3-Speed Thermostat Control
P = MP Control with Surface-Mount Thermostat
Connection with Unit Mounted Switch
4 = MP Control with Surface-Mount Thermostat
Connection with 2-Speed Thermostat Control
5 = MP Control with Surface-Mount Thermostat
Connection with 3-Speed Thermostat Control
(ECM Only)
VOLTAGE
1 = 208/230-60-1
6 = 265-60-1
CABINET OPTIONS
Cabinet Height No OA
Options
Left Top OA Entry
(4-inch Round)
Left Top OA Entry (4-inch
Round with Motorized Damper)
Right Top OA Entry
(4-inch Round)
Right Top OA Entry (4-inch
Round with Motorized Damper)
88 inches A G L R W
80 inches B H M T X
80 inches with 4-inch Stand D K P V Z
80 inches with 8-inch Stand F 2 4 6 8
SUPPLY AIR CONFIGURATION
1H = Single Horizontal Supply 2T = Double Horizontal Supply
+ Top
2H = Double Horizontal Supply
3H = Triple Horizontal Supply 3T = Triple Horizontal Supply
+ Top
0T = Top Only
1T = Single Horizontal Supply
+ Top
00 = Field Cut (No Openings)
HORIZONTAL DISCHARGE OPENING
ORIENTATION
00, 0T 1H, 1T 2H, 2T 3H, 3T
X = None B = Back 1 = Left + Front 7 = Front + Left + Right
F = Front 2 = Left + Back 8 = Front + Right + Back
L = Left 3 = Left + Right 9 = Front + Left + Back
R = Right 4 = Right + Back
5 = Right + Front
6 = Back + Front
ELECTRICAL CONNECTION
0 = None (Terminal Block)
D = Non-Fused Disconnect
F = Disconnect with Fuses
MISCELLANEOUS OPTIONS
0 = None
S = Stainless Steel (SST) Drain Pan
F = MERV 8 Filters
C = SST Drain Pan with MERV 8 Filters
PRODUCT CATEGORY
VB = Vertical Stacked Heat Pump -
Standard Cabinet Assembly
VM = Vertical Stacked Heat Pump -
Master Cabinet Assembly
VS = Vertical Stacked Heat Pump -
Satellite Cabinet Assembly

5
FORM 145.18-IOM1
ISSUE DATE: 8/30/2018
CHASSIS NOMENCLATURE
PRODUCT CATEGORY
VSCS = Vertical Stacked Heat Pump Chassis
R-410A
UNIT CAPACITY
09 = 0.75 TON
12 = 1 TON
15 = 1.25 TON
18 = 1.5 TON
24 = 2 TON
30 = 2.5 TON
36 = 3 TON
DESIGN SERIES
C = Current Generation AUTO-FLOW REGULATOR
0 = No Flow Control Valve
B = 1.5 USGPM
C = 2.0 USGPM
D = 2.5 USGPM
E = 3.0 USGPM
F = 3.50 USGPM
H = 4.0 USGPM
J = 4.5 USGPM
K = 5.0 USGPM
L = 6.0 USGPM
M = 7.0 USGPM
N = 8.0 USGPM
P = 9.0 USGPM
R = 10.0 USGPM
AIRSIDE OPTIONS
A = Standard Airside Coil
C = Corrosion Protective Coating
WATERSIDE OPTIONS
C = Standard Water Coil
B = Standard Water Coil with Low Temperature
Option
N = Cupro-Nickel Water Coil
R = Cupro-Nickel Water Coil with Low Temperature
Option
MISCELLANEOUS OPTIONS
O = None
1, 2, 3, 4 5, 6 7 8 9 10 11 12 13
VSCS 12 C 1 0 0 A C 0
VOLTAGE
1 = 208/230-60-1
6 = 265-60-1
WATER VALVE & PUMP OPTIONS
VALVE OPTIONS VALVE
ONLY Y-STRAINER
No Water Control Valve O S
Motorized 2-Way Shut-Off Valve M Y
Motorized 3-Way Shut-Off Valve N V

6
FORM 145.18-IOM1
ISSUE DATE: 8/30/2018
TABLE OF CONTENTS
SECTION 1 - INSTALLATION ..................................................................................................................................9
Notice and Disclaimer ......................................................................................................................................9
Disclaimer................................................................................................................................................9
Pre-Installation .................................................................................................................................................9
Literature .................................................................................................................................................9
Shipping ..................................................................................................................................................9
Inspection and Storage .........................................................................................................................10
Preparations for Installing the Unit ........................................................................................................10
Rigging .................................................................................................................................................. 11
Cabinet Riser Installation ............................................................................................................................... 11
Placing the Cabinet ............................................................................................................................... 11
Riser Loop ......................................................................................................................................................16
Hoses .............................................................................................................................................................16
Electrical Wiring.............................................................................................................................................. 18
Field-Installed Power Wiring..................................................................................................................18
Field-Installed Low Voltage Wiring ........................................................................................................18
Optional Surface Mount Thermostat Connection Wiring .......................................................................19
Optional Remote Mounted Thermostat Wiring ......................................................................................19
Optional ADA Door Mounted Thermostat ..............................................................................................20
EC Motor (ECM) Continuous Fan .........................................................................................................20
Closet and Drywall Installation .......................................................................................................................20
Acoustic Return Air (RA) Panel ......................................................................................................................20
Supply Air (SA) Ductwork ...............................................................................................................................24
Horizontal Supply Air .............................................................................................................................24
Top Discharge Supply Air ......................................................................................................................24
Top Mounted Fresh Air Intake ........................................................................................................................27
Top Mounted Fresh Air Intake with Motorized Damper ......................................................................... 27
System Flushing and Cleaning ...................................................................................................................... 28
Flushing the System..............................................................................................................................28
Cleaning the System .............................................................................................................................29
Chassis Installation ........................................................................................................................................32
For Units with NPSH Valve Connection and Hose Sets........................................................................32
For Units with NPT Style (Tapered Pipe Thread) Valve Connection and Hoses ................................... 32
SECTION 2 - OPERATION .....................................................................................................................................35
Pre-Start-Up Checklist.................................................................................................................................... 35
Initial Unit Start-Up .........................................................................................................................................35
System Loop Temperature .............................................................................................................................36
Fan Speed Adjustment ...................................................................................................................................36
Unit Controls...................................................................................................................................................40
Sequence of Operation .........................................................................................................................40
Continuous Blower ................................................................................................................................40
Safety Control Reset .............................................................................................................................40
Operation Errors....................................................................................................................................41
Safety Controls......................................................................................................................................41
Random Start ........................................................................................................................................42
Compressor Protection..........................................................................................................................42
Microprocessor Control Unit Flash Codes.............................................................................................42
Communication ....................................................................................................................................42

7
FORM 145.18-IOM1
ISSUE DATE: 8/30/2018
LIST OF FIGURES
TABLE OF CONTENTS (CONT'D)
SECTION 3 - MAINTENANCE................................................................................................................................43
APPENDIX ..............................................................................................................................................................45
Heating and Cooling Data Record Sheet .......................................................................................................49
R-410A Quick Reference Guide .....................................................................................................................51
FIGURE 1 - Ideal Riser Insertion Depth ..................................................................................................................12
FIGURE 2 - Correct/Incorrect Stub-Out Positions in Cabinet Riser Opening..........................................................12
FIGURE 3 - Cabinet Unit Dimensions & Floor Sleeve Dimensions.........................................................................14
FIGURE 4 - Cabinet Riser Dimensions ...................................................................................................................15
FIGURE 5 - Standard Factory Supplied NPSH Hose Kits and Risers.....................................................................17
FIGURE 6 - Optional Field Supplied Risers with Factory Supplied NPSH Hose Kits and Shut-Off Valves.............17
FIGURE 7 - Conversion of NPT to NPSH Type Fittings (VB Units with NPT Fittings Only) ....................................18
FIGURE 8 - Field Wiring Diagram ...........................................................................................................................19
FIGURE 9 - Remote Thermostat Wiring..................................................................................................................19
FIGURE 10 - Unit Switch Plate with ADA Thermostat Connection..........................................................................20
FIGURE 11 - Critical Return Air (RA) Panel with Unit Cabinet Installation Dimensions ..........................................21
FIGURE 12 - RA Panel Cross Section Installation at Floor Level ...........................................................................22
FIGURE 13 - RA Panel Dimensions........................................................................................................................22
FIGURE 14 - Optional RA Panel with ADA Mounted Thermostat............................................................................23
FIGURE 15 - Supply Grille with Volume Damper and 1/8-inch Neoprene Tape Applied to Perimeter ....................24
FIGURE 16 - Unit Mounted Supply Grille Installation..............................................................................................25
FIGURE 17 - Damper Plate Fasteners....................................................................................................................27
FIGURE 18 - Remove the Red Cover .....................................................................................................................27
FIGURE 19 - Position Black Cover..........................................................................................................................28
FIGURE 20 - System Flushing and Cleaning..........................................................................................................29
FIGURE 21 - Fresh Air Opening without Motorized Damper – Left and Right Hand Unit Shown ...........................30
FIGURE 22 - Fresh Air Opening with Motorized Damper – Left and Right Hand Unit Shown ................................31
FIGURE 23 - Lift the Chassis Front.........................................................................................................................33
FIGURE 24 - Tilt the Chassis ..................................................................................................................................33
FIGURE 25 - Insert the Chassis..............................................................................................................................33
FIGURE 26 - Pivot the Chassis...............................................................................................................................34
FIGURE 27 - Slide the Chassis...............................................................................................................................34
FIGURE 28 - Check the Chassis.............................................................................................................................34
FIGURE 29 - PSC Motor Wiring Diagram ...............................................................................................................45
FIGURE 30 - ECM Wiring Diagram.........................................................................................................................46
FIGURE 31 - Continuous Fan with ECM Wiring Diagram .......................................................................................47
FIGURE 32 - Motorized Damper ECM Wiring Diagram ..........................................................................................48

8
FORM 145.18-IOM1
ISSUE DATE: 8/30/2018
LIST OF TABLES
TABLE 1 - High Series Physical Data .....................................................................................................................13
TABLE 2 - Replacement Hose Gaskets..................................................................................................................16
TABLE 3 - Chassis Hoses.......................................................................................................................................16
TABLE 4 - Typical Wire Connections ......................................................................................................................19
TABLE 5 - Unit Supply Opening Sizes....................................................................................................................26
TABLE 6 - Unit Supply Face Velocity (FPM)...........................................................................................................26
TABLE 7 - Operating Limits ....................................................................................................................................36
TABLE 8 - PSC Standard Blower Performance (CFM)...........................................................................................37
TABLE 9 - PSC High Static Blower Performance (CFM) ........................................................................................37
TABLE 10 - ECM Standard Blower Performance (CFM) ........................................................................................38
TABLE 11 - ECM High Static Blower Performance (CFM)......................................................................................38
TABLE 12 - ECM Blower Performance - All Speed Taps (CFM).............................................................................39
TABLE 13 - Flash Codes ........................................................................................................................................42

9
FORM 145.18-IOM1
ISSUE DATE: 8/30/2018
1
After installing the unit, show the user
how to turn off the electricity to the unit.
Point out control and switch locations for
turning off the electricity.
Ensure the user understands the impor-
tance of following all safety precautions.
NOTICE AND DISCLAIMER
This unit contains refrigerant installed by the factory
that is approved for use in the unit’s intended country
of installation or market. Distributors are only autho-
rized to provide refrigerants that have been approved
for use in the countries or markets they serve.
The refrigerant used in this unit is identified on the
unit's nameplate and in this manual. Any additions of
refrigerant into this unit must comply with the coun-
try’s requirements with regard to refrigerant use and
should be obtained from manufacturer approved dis-
tributors. Use of unapproved refrigerant substitutes
will void all warranties and can cause injury or death.
Disclaimer
Customer modifications to certified products are pro-
hibited. If performed without the express written ap-
proval of the manufacturer, modifications will void
all warranties (expressed or implied) and may result
in hazardous situations resulting in equipment damage,
serious physical injury or property damage, or death.
The manufacturer has certified the product as being
compliant with applicable government and/or industry
standards. Product certification is designated either on
the product itself or in the product literature. The cer-
tification mark identifies the applicable standards as
well as the Nationally Recognized Test Lab (NRTL) or
other testing facility that conducted the testing, where
applicable.
If changes are made to the product, an engineering re-
view is required to assess the impact to the product cer-
tification. In some instances, the changes may require
that the NRTL or testing facility review and re-approve
the product by means of a field or site inspection and
certification.
Modifications may invalidate product certifications or
violate country standards. Any person or entity making
changes to the product is responsible for obtaining the
required engineering review and approval, as well as
covering certification and other related costs.
Unauthorized customer modifications to certified
products are prohibited for the following reasons:
A. Modications may create hazards that could result
in death, serious injury, or equipment damage.
B. Modications will void product warranties.
C. Modications may invalidate product certica-
tions and may violate country standards. Country
standards may require that only certied products
be used in certain applications, and modications
that result in the loss of product certication may
violate those standards.
PRE-INSTALLATION
Literature
Review this Installation, Operation, and Maintenance
(IOM) manual prior to installation. After installing the
unit, give this IOM to the end user. If help is needed
with any of the installation instructions or matters re-
lating to the unit, contact the sales office where you
bought the unit. You may also refer to the unit rating
plate for a contact name.
Shipping
Cabinets and risers ship in one of the following con-
figurations:
• Cabinets are stacked on their side with risers at-
tached. Chassis ship on separate skids.
• Risers ship loose, packaged in boxes and sorted
by oor. Cabinets ship upright up to four per skid.
Chassis ship on separate skids.
• Risers ship loose, packaged in boxes, and sorted
by oor. Cabinets ship upright on skids with chas-
sis inside the cabinet. Chassis electrical and water
connections are not installed. The chassis is se-
cured to the service panel. Remove the screws be-
fore removing the service panel and chassis.
The cabinet must remain standing upright. Do not
place cabinets on their side with the chassis inside.
SECTION 1 - INSTALLATION

10
FORM 145.18-IOM1
ISSUE DATE: 8/30/2018
SECTION 1 - INSTALLATION
Inspection and Storage
Store cabinets, chassis, and risers the same way they
were shipped. Ensure the storage area is dry and pro-
tected from the environment. Keep the units in their
upright position. If the risers are stored at the job site,
ensure the pipe ends are capped to prevent foreign ob-
ject debris and contamination.
In areas where construction is not complete (including
dry wall, plaster, paint, and where any emission of dust
particulates or fumes from outgassing are present), all
precautions must be taken to protect the cabinet, open-
ings, and chassis from contamination or physical damage.
Upon delivery, perform the following inspections:
1. Inspect the unit for shipment damage. Notify the
Transportation Company of any damage and note
the damage on the shipping receipt.
Rough handling may dislocate and dam-
age internal components.
2. Inspect the riser projections at each end of the
cabinet for misalignment or end damage that
would prevent making an acceptable connection.
3. Inspect the thermostats and other accessories that
have been shipped separately for quantity and
transit damage.
Store the refrigeration chassis in the normal upright
orientation to maintain oil in the compressor sump.
Preparations for Installing the Unit
Before installing the unit, perform the following prep-
arations:
• Verify the model number on the unit nameplate
with the ordering and shipping information to en-
sure the correct unit has been shipped.
• Carefully inspect each unit before delivery to the
installation site. All cabinets may not be equipped
with the same size riser or the same air supply
grille arrangement. In most cases, each cabinet is
individually tagged for a specic location in the
building.
• Keep the cabinet sealed with the shipping materi-
als until all plastering, painting, and construction
work is complete.
• Remove the inner service panel and manually
check the blower wheel for free rotation.
• Match the refrigeration chassis to the proper cabi-
nets by referring to the cabinet and chassis name-
plate and label information.
• Remove the chassis refrigeration access panel
(top cover) and inspect the unit. Ensure that the
refrigerant tubing is free from obvious physical
damage and kinks, and check that piping does not
touch other unit components.
• Ensure the compressor is mounted on neoprene
isolators with metal spacing sleeves inside. Se-
cured it with nuts that are snug against the metal
spacer sleeves.
• Inspect all electrical connections. Connections
must be clean and tight at the terminals.
Do NOT use the risers to lift the cabinet
assembly.
Do NOT install this unit outdoors.
A compressor/unit comprises a pressur-
ized system. Never loosen threaded joints
while the system is under pressure, and
never open pressurized system parts.
Before servicing, open and tag all discon-
nect switches.
Do NOT install units in a flammable
environment due to the danger of an
explosion.

11
SECTION 1 - INSTALLATION
FORM 145.18-IOM1
ISSUE DATE: 8/30/2018
1
Safety guards, shields, barriers, cov-
ers, and protective devices must not be
removed while the compressor/unit is
operating.
All safety features, disengagement, and
interlocks must be in place and function
correctly before the equipment is put into
operation. Never bypass or wire around
any safety device.
Use gloves and protective goggles where
appropriate and have a gas mask close at
hand. Use electrical protection equipment
and tools suited for electrical operations.
Personnel must be qualied according
to national safety rules and regulations.
Only manufacturer- qualied personnel
should install this system. If not, it may
cause water leakage, electric shock, or
re.
Rigging
Follow all applicable regulations and
safety practices during rigging and lifting.
Prepare and follow written rigging and lifting plan.
Lifting must be directed by trained, professional rigger.
Spreader bars must be used and be long enough to pre-
vent rigging from contacting unit. Use only the desig-
nated lift points according to unit's IOM, and use ALL
lift points.
Locate the center of gravity through trial lifts to ac-
count for possible variations in unit configuration. Use
rigging and lifting techniques that keep the unit stable
and level. Keep clear of unit when lifted.
CABINET RISER INSTALLATION
Do NOT use the risers to lift or move the
cabinets.
Refer to Figure 3 on page 14, which shows the
correct location of the cabinet in relation to the floor
sleeve and risers.
Risers are not designed to support or lift any part of the
cabinet. Do not use them to lift a cabinet. Risers are at-
tached using nylon ties to allow for slight adjustments
during installation, and expansion of riser column dur-
ing operation. Take care during installation to avoid
damage to risers and riser stub-outs.
Improper handling and installation of
risers could damage riser stub-outs and
valves and could result in property dam-
age, death, or serious injury.
Do not allow the risers to bottom out. Riser
stub-out should be centrally located with
the stub-out opening of the cabinet riser.
Do not allow riser stub-outs or risers to
contact cabinet sheet metal.
Do not drag risers on the oor while mov-
ing the cabinet.
When the risers are shipped loose, riser installation can
be completed before cabinet installation. When install-
ing risers, ensure the riser stub-outs are centered in the
the cabinet openings. Ensure that the risers cannot bot-
tom out in swage (see Figure 1 on page 12).
When risers are shipped attached to cabinets, complete
the installation of risers and cabinet at the same time.
Detaching the riser from the cabinet is unnecessary.
Placing the Cabinet
The correct location of the cabinet in relation to the
floor sleeve and risers is shown in Figure 3 on page
14.To place the cabinet correctly, perform the fol-
lowing steps:

12
FORM 145.18-IOM1
ISSUE DATE: 8/30/2018
SECTION 1 - INSTALLATION
1. Place the cabinet in a horizontal position on the
oor adjacent to its installation location (when ris-
ers are attached to cabinet).
The units are designed to accommodate a maxi-
mum supply and return riser stub-out movement
of 1-1/2 inches due to expansion and contraction
(total movement of 3 inches). If the total calcu-
lated riser expansion or contraction exceeds 1-1/2
inches, the field must provide expansion compen-
sation.
2. Install eld or factory-provided riser extensions,
if required, to the unit-mounted risers prior to
moving the cabinet into nal position.
3. Raise the cabinet upright. Lower the risers through
the oor cutout, aligning the risers into the swaged
section of the unit on the oor below.
Take extra care not to scrape or dent ris-
ers during positioning. The riser tailpiece
should insert approximately 2 inches into
the 3-inch long swaged section of the unit
below.
DO NOT allow the riser tailpiece to bottom
out into the swaged section. This ensures
the correct riser positioning and com-
pensates for variations in oor-to-oor
dimensions.
4. Center the risers in the pipe chase, and level the
cabinet using shims as necessary.
5. Plumb risers in two planes to assure proper unit
operation and condensate drainage.
6. Anchor the cabinets into place using rubber iso-
lated sheet metal angles. Approved and tested
sheet metal angles are available from factory.
It is strongly recommended to install vibration
isolation pads to reduce noise transmission into
the floor. Failure to use isolation kits could result
in loud unit operation.
Do not drill or drive screws into the cabi-
net in the area of the internal drain pan.
7. Center the risers’ horizontal stub-outs (complete
with factory-installed shut-off valves) in the cabi-
net slot openings. Ensure that the stub-outs are
perpendicular to the side/back panel.
8. Verify all risers are vertical and that they penetrate
the swaged joint at least 1 inch.
Factory provided risers come with a 3-inch deep
swage. Do not allow risers to completely bottom
out at 3 inches in the swage. The 3-inch swage
depth is oversized to allow for adjustments if nec-
essary to keep riser stub-outs and valves centered
in the cabinet opening.
9. Center the riser stub-out in cabinet opening to
allow for expansion and contraction. Riser stub-
outs must not contact on any sheet metal opening.
Otherwise damage can occur to stub-outs, result-
ing in water leaks and property damage.
Top Vertical
Riser
Bottom
Vertical Riser
2-inch Ideal
Insertion Depth
3-inch Cup
Height
LD23535
FIGURE 1 - IDEAL RISER INSERTION DEPTH
LD19017
FIGURE 2 - CORRECT/INCORRECT STUB-OUT
POSITIONS IN CABINET RISER OPENING

13
SECTION 1 - INSTALLATION
FORM 145.18-IOM1
ISSUE DATE: 8/30/2018
1
10. Braze or solder riser joints with industry accepted
solder or brazing rod material.
The riser system must be secured to build-
ing structure. Cabinets are not designed
to support the riser system.
11. Secure the riser system at a minimum of one point
to the building structure. Cabinets are not intend-
ed to support the riser system. If the temperature
range of the system exceeds the allowed expan-
sion and contraction limits (1-1/2 inches maxi-
mum), the installing contractor must make riser
compensation provisions.
12. Ensure that individual unit shut-off valves remain
closed until the circulating loop system is cleaned
and ushed.
TABLE 1 - HIGH SERIES PHYSICAL DATA
HIGH SERIES MODEL 09 12 15 18 24 30 36
Nominal Cooling (ton) 1 0.75 1.0 1.25 1.5 2.0 2.5 3.0
Compressor Type Rotary Scroll
Refrigerant Charge (oz) 21 25 34 38 44 48 50
Air Coil-Type Enhanced Copper Tubes, Enhanced Aluminum Fins
Face Area (sq ft) 1.46 1.56 2.35 2.35 2.63 3.33 3.33
Rows/FPI 2/146 3/14 3/14 3/14 3/14 3/14 3/14
Water Coil-Type Enhanced Surface Co-Axial
Standard Blower/Motor Double Width Double Inlet (DWDI) Forward-Curved Centrifugal/Permanent Split Capacitor
(PSC) Direct Drive
Diameter x Width (inches) 9x4T 9x4T 9x7T 9x7T 9x7 9x8 9x8
Motor HP 0.10 0.10 0.17 0.17 0.25 0.33 0.50
Hi-Static Blower/Motor DWDI Forward-Curved Centrifugal/PSC Direct Drive
Diameter x Width (inches) 9x4T 9x4T 9x7T 9x7T 10x7T 10x8T 10x8T
Motor HP 0.10 0.10 0.17 0.17 0.25 0.33 0.50
EC Motor (ECM) Blower/Motor DWDI Forward-Curved Centrifugal/ECM Direct Drive
Diameter x Width (inches) 9x4T 9x4T 9x7T 9x7T 10x7T 9x8 9x8
Motor HP 0.33 0.33 0.33 0.33 0.33 0.50 0.50
Hi-Static ECM Blower/Motor DWDI Forward-Curved Centrifugal/ECM Direct Drive
Diameter x Width (inches) 9x4T 9x4T 9x7T 9x7T 10x7T 10x8T 10x8T
Motor HP 0.33 0.33 0.33 0.33 0.33 0.50 0.50
Filter Quantity/Size (inches) 1/14x25x1 1/14x25x1 1/16x30x1 1/16x30x1 1/16x30x1 1/20x30x1 1/20x30x1
Cabinet Weight (lb) 2130 130 145 145 150 175 175
Chassis Weight (lb) 70 75 95 100 140 155 160
NOTE:
1. Nominal capacity is calculated in accordance with ARI/ISO Standard 13256-1 for water loop application.
2. Cabinet weight is approximate and does not include the weight of the risers.

14
FORM 145.18-IOM1
ISSUE DATE: 8/30/2018
SECTION 1 - INSTALLATION
A/2
R
R
R
S
S
S
D
D
D
VSHP Cabinet
Drain Pan
Do not penetrate
this area with
drills or screws
1.50
4.75
7/8-inch
Control
Entrance
Optional
Front Supply
Opening
Optional 24V
Connection for
Surface Mount/
Remote Mounted
Thermostat Switch Plate with
2 Speed Fan
Switch (Optional:
Disconnect/Fuses,
ADA Molex
Connector)
Electrical Box
Chassis
Service
Panel
Left View Front View
50 inches
6 inches
3 inches
80
inches
or 88
inches
Optional
Riser
Cover
Shown
4.25 inches
Right
Left
4.25 inches
Back
13.25
inches
4.25 inches
4.25 inches
4 inches
Top View Front 4-5/16 inches
R - Return Riser
S - Supply Riser
D - Drain Riser
7/8-inch
OD Power
Entrance
4.25
Right View
1-inch
Supply
Duct
Flange
Return
Riser
Opening
Supply Riser
Opening
Supply Riser
Opening
Back View
inches
inches
Condensate
Riser Opening
48 inches
Riser
Opening
Knock-
Outs (All
3 Sides)
4.5 inches
Return Air
Flange Standard
1 inch
B A
7 inches
Service
Hoses
Pass-Thru
7/8-inch
OD Control
Entrance 8.5
4 in.
6 in.
4.5 inches
50.5 inches
36 inches
A/2
Return Riser
Opening
CABINET DIMENSIONS (INCHES)
MODEL A B RA FLANGE
WIDTH (C)
09–18 17 17 16
15–24 20 20 19
30–36 24 24 23
NOTES
1. Supply, return, and condensate riser openings are pre-punched on all sides and eld convertible. Cut tabs to remove the knock-out.
2. Supply and return openings are 4 inches x 2.5 inches. During riser installation, ensure the stub-out is centered in supply and return openings.
3. Condensate P-trap is accessible from the front by removing the bottom cover plate.
4. Riser and shut-off location is measured from base of cabinet and does not include the stand height.
LD27627
FIGURE 3 - CABINET UNIT DIMENSIONS & FLOOR SLEEVE DIMENSIONS

15
SECTION 1 - INSTALLATION
FORM 145.18-IOM1
ISSUE DATE: 8/30/2018
1
Return Air
Opening
Optional
Supply
Opening
Insulation 3 in.
AB
Shut-Off
Ball Valve
Supply
and
Return
Risers
36 inches
6 in.
P-Trap
Allow for 2-inch Insertion
into Swage End
Supply and Return Riser (Max. 120 inches)
Condensate Riser (Max. 120 inches)
As Req'd
Reduce Up Riser (Max. 120 inches)
Reducer
Reducer
Reduce Down Riser (Max. 120 inches)
Capped Down Riser
Capped Up Riser
As Req'd
As Req'd As Req'd As Req'd
NOTE
Riser shut-off valve is measured from base of cabinet and does not include the stand height.
LD19330
FIGURE 4 - CABINET RISER DIMENSIONS

16
FORM 145.18-IOM1
ISSUE DATE: 8/30/2018
SECTION 1 - INSTALLATION
RISER LOOP
5. Install the following parts at the base of each sup-
ply and return riser to enable system ushing, bal-
ancing, and servicing:
• Drain valve
• Shut-off/balancing valves
• Flow indicators
• Drain tees
6. Install strainers at the inlet of each circulating
pump.
7. Insulate loop water piping that runs through un-
conditioned areas of the building or outside the
building.
When the loop water temperature is maintained
between nominal operating limits of 60.0–90.0°F,
piping does not sweat or suffer undue heat loss at
conditioned space temperatures.
8. Install vents in piping loop as required to bleed
residual air from the piping system during lling
and servicing.
9. Determine the riser shut-off valves and hose kits
required for job specic site conditions:
a. Factory-supplied risers come with the appro-
priate hose kits with NPSH type fittings (see
Figure 5 on page 17). Before attaching
NPSH type hoses, check that the female end
gasket is not missing and is free of damage
or debris. See Table 2 for information on re-
placement gaskets for NPSH hose kits.
b. For field-supplied risers, it is recommended
to order the appropriate NPSH type field
hose kits from the factory, complete with
shut-off valves. Shut-off valves are to be
field sweat connected to risers (see Figure 6
on page 17).
c. Legacy chassis with NPT type connections
and matching risers with NPT shut-off valve
connections require a special hose kit. The kit
comes complete with a NPT to NPSH swiv-
el adapter on the shut-off valve and chassis
connection to mate with factory hoses (see
Figure 7 on page 18.
TABLE 2 - REPLACEMENT HOSE GASKETS
PART NUMBER DESCRIPTION
VSGK-UFHW-050 1/2-inch Rubber Gasket
VSGK-UFHW-075 3/4-inch Rubber Gasket
HOSES
Ensure the correct hose set is matched with the com-
patible unit size (see Table 3). Instal the NPSH factory-
provided hoses by completing the following steps:
1. Inspect for missing or damaged hose gasket. See
Table 2 for replacement gasket part numbers.
2. Tighten by hand the screw connections to the
male NPSH tting on the shut-off valve. Hold the
ferrule stationary when tightening.
3. Tighten using a backup wrench a 1/4 turn further.
Do not overtighten.
When installing hoses, do not apply a
twist or torque load on the hose.
When tightening hoses, hold the ferrule
stationary by hand while tightening the
screw connections. Avoid tight bends, or
water ow and high pressure drops may
occur.
Hose gasket does not require extreme
tightening to obtain a seal. DO NOT
OVERTIGHTEN, or damage to gasket or
sealing surface will occur. Do not apply
thread sealant.
Hoses must be hand tightened, then fur-
ther tightened for roughly another 1/4
turn. Check for leaks before tightening
any further. Do not apply excessive force;
rubber gaskets might get damaged.
Always use a back-up wrench when tight-
ening hoses to valves. Otherwise, valve
solder joint may fail, leading to property
damage or serious injury.
TABLE 3 - CHASSIS HOSES
CHASSIS MODEL HOSE TYPE
09–18 1/2-inch NPSH Female-Female
24–36 3/4-inch NPSH Female-Female

17
SECTION 1 - INSTALLATION
FORM 145.18-IOM1
ISSUE DATE: 8/30/2018
1
LD18126
1/2-INCH OR 3/4-INCH FLEXIBLE CONNECTOR HOSE
(24 INCHES LONG)
1/2-INCH OR 3/4-INCH NPSH THREADS
1/2-INCH OR 3/4-INCH MALE NPSH
1/2-INCH OR 3/4-INCH NPSH THREADS
1/2-INCH OR 3/4-INCH MALE NPSH BALL VALVE
GASKET
GASKET
NOTE
National Pipe Straight Hose (NPSH) connection
LD18126
FIGURE 5 - STANDARD FACTORY SUPPLIED NPSH HOSE KITS AND RISERS
LD18127
1/2-INCH OR 3/4-INCH MALE NPSH
1/2-INCH OR 3/4-INCH NPSH THREADS
1/2-INCH OR 3/4-INCH FLEXIBLE CONNECTOR HOSE
(24 INCHES LONG)
1/2-INCH OR 3/4-INCH WATER PIPE STUB-OUT
1/2-INCH OR 3/4-INCH NPSH THREADS
1/2-INCH OR 3/4-INCH SWEAT TO MALE NPSH BALL VALVE
NOTE
National Pipe Straight Hose (NPSH) connection
LD18127
FIGURE 6 - OPTIONAL FIELD SUPPLIED RISERS WITH FACTORY SUPPLIED NPSH HOSE KITS AND SHUT-
OFF VALVES

18
FORM 145.18-IOM1
ISSUE DATE: 8/30/2018
SECTION 1 - INSTALLATION
1/2-INCH OR 3/4-INCH FPT BALL VALVE
(FACTORY OR FIELD PROVIDED)
FEMALE SWIVEL
1/2-INCH OR 3/4-INCH NPSH THREADS
1/2-INCH OR 3/4-INCH FLEXIBLE
CONNECTOR HOSE (24 INCHES LONG)
FEMALE SWIVEL
1/2-INCH OR 3/4-INCH NPSH THREADS
ADAPTER MPT TO NPSH
INCLUDED WITH HOSE
CHASSIS WATER CONNECTION
1/2-INCH OR 3/4-INCH FPT
(FACTORY PROVIDED)
GASKET INCLUDED
WITH HOSE
ADAPTER MPT TO NPSH
INCLUDED WITH HOSE
GASKET INCLUDED
WITH HOSE
HANDLE MUST BE
FACING THE BOTTOM
NOTE
National Pipe Straight Hose (NPSH) connection
LD27628
FIGURE 7 - CONVERSION OF NPT TO NPSH TYPE FITTINGS (VB UNITS WITH NPT FITTINGS ONLY)
ELECTRICAL WIRING
Lock all electrical power supply switches
in the OFF position before installing the
unit. Failure to disconnect power supply
may result in electrical shock or even
death.
Field-Installed Power Wiring
Power wiring to the equipment must conform to Na-
tional Electrical Codes (NEC), local electrical codes,
and must be performed by a licensed electrician.
Provide each unit with its own separate electrical cir-
cuit, means of circuit protection, and electrical discon-
nect switch. Follow current NEC ANSI/NFPA 70, CSA
C22.1 C.E.C. Part 1, and state and local codes.
Failure to provide these shut-off means
could cause electrical shock or re, re-
sulting in damage, injury, or death.
Use copper conductors only! Failure
to use copper conductors can result in
equipment damage.
Verify that the available unit power supply is compat-
ible with the unit’s nameplate rating. Ensure the break-
er is properly sized as per the nameplate. The line volt-
age supply enters through the right side of the cabinet
at the 7/8-inch power entrance knock-out.
Connect to the line side of the factory-installed termi-
nal block. Unit terminals are not designed to accept
other types of conductors. Failure to use copper con-
ductors may result in equipment damage.
Field-Installed Low Voltage Wiring
Select a location for room thermostat, away from supply
air registers, on draft-free interior wall that is far from
lights, television, direct sunlight, or other heat sources.
Locate thermostat away from supply
drafts. Ensure the back of the thermostat
is sealed and protected from air drafts.
Short cycling can result in damage to
the unit.

19
SECTION 1 - INSTALLATION
FORM 145.18-IOM1
ISSUE DATE: 8/30/2018
1
Install the thermostat by connecting the remote ther-
mostat wiring to microprocessor board low voltage
terminal strip. See Figure 8 for typical wiring connec-
tions.
Ensure that the control wiring between the thermostat
and the unit’s terminations does not exceed 1 ohm.
Resistance in excess of 1 ohm may cause
component damage due to insufcient AC
voltage supply.
Check all loads and conductors for
grounds, shorts, or miswiring. Do not run
the low voltage wiring in the same conduit
with the high voltage power wiring.
TABLE 4 - TYPICAL WIRE CONNECTIONS
RECOMMENDED WIRE
SIZE (GAUGE)
MAXIMUM LOW VOLTAGE
WIRE LENGTH (FEET)
20 50
18 75
16 125
LD19520
FIGURE 8 - FIELD WIRING DIAGRAM
Optional Surface Mount Thermostat
Connection Wiring
For applications where the thermostat is mounted di-
rectly above the return air (RA) panel, select cabinet
control option P (for example, VB12P). The thermostat
Molex pigtail harness (shipped loose) is field wired to
thermostat terminals. The Molex connector clips to the
panel-mounted, mating Molex connector on unit cabi-
net that is located 7 inches above the electrical box. See
optional 24V surface mount connection in Figure 3 on
page 14.
Optional Remote Mounted Thermostat Wiring
For units ordered with an extended thermostat harness
option, the thermostat is remote mounted. A specific,
plenum rated extended harness length can be ordered.
Use low voltage 7/8-inch knock-out on the side of the
unit at the electrical box to field wire the low voltage
thermostat wiring. Using a plastic bushing to pass the
harness inside electrical box to the factory wired mat-
ing Molex harness (see Figure 9). The thermostat pig-
tail Molex harness ships loose for field wiring to the
thermostat terminals.
LD27629 LD27630
FIGURE 9 - REMOTE THERMOSTAT WIRING

20
FORM 145.18-IOM1
ISSUE DATE: 8/30/2018
SECTION 1 - INSTALLATION
Optional Disconnect
Optional ADA Molex
Connection
LD27631
FIGURE 10 - UNIT SWITCH PLATE WITH ADA
THERMOSTAT CONNECTION
Optional ADA Door Mounted Thermostat
For units ordered with the Americans with Disabilities
Act (ADA) thermostat option to meet ADA require-
ments, the thermostat is located on the RA panel door
at a height of 48 inches from the base of the cabinet.
Unit is supplied with a custom RA door panel with
thermostat mounting holes, unit switch plate with a
Molex connector, and an ADA Molex pigtail harness.
See Acoustic Return Air (RA) Panel on page 20 and
Figure 14 on page 23.
Wire leads from the ADA thermostat harness are field
wired to thermostat terminals. The Molex end of the
ADA thermostat harness is field connected to the sur-
face mounted Molex connector at unit switch plate.
Mount the thermostat using the factory provided 1/4-
inch number 8 screws. The ADA thermostat harness is
plenum rated. It hangs behind the RA door. For chassis
servicing, unclip harness from unit switch plate.
EC Motor (ECM) Continuous Fan
This option features a factory wired continuous low
speed fan circuit. Because of the five available motor
speed taps, the EC motor (ECM) offers an ideal range
for supporting continuous low speed fan.
The fan runs continuously on the low fan speed setting
even if there is no demand for cooling or heating. The
continuous fan is controlled by a dry contact to provide
interlocking to energy recovery ventilator (ERV) or
room occupancy control. See Figure 28 on page 46
for electrical schematics.
CLOSET AND DRYWALL INSTALLATION
To avoid potential vibration and noise is-
sues, the RA panel should not contact any
part of the unit cabinet or sleeve. Maintain
a sufcient gap between RA panel frame
and cabinet.
Build a closet enclosure for the cabinet that incorpo-
rates the RA panel size while maintaining a sufficient
gap between the closet and cabinet. This prevents the
cabinet from contacting the RA panel and closet enclo-
sure. Refer to Acoustic Return Air (RA) Panel on page
20, Figure 11 on page 21,and Figure 12 on page
22.
1. Cover the supply and return openings with plas-
tic or cardboard before installing drywall around
cabinet. This prevents dust or debris from entering
the unit components.
2. Install the drywall using conventional construc-
tion methods. Do not fasten studs or drywall di-
rectly to the cabinet surface. Space the framing
members according to the RA access and the type/
quantity of supply air (SA) outlets. See Figure 11
on page 21 and Figure 12 on page 22.
3. Install sheetrock around unit cabinet by securing
the drywall to the building construction studs.
4. Cut holes around the SA and RA openings to al-
low access to the unit chassis, unit controls, and
the SA connection.
5. Vacuum all dust and construction debris from the
unit drain pan, electrical box, and discharge ple-
num after cutting out the supply/returns openings.
To prevent electrical shorts and drain pan
leaks, DO NOT penetrate unit compo-
nents when driving screws near the unit
control box or drain pan. Do not allow
screws or nails to penetrate chassis, risers,
electrical junction boxes, conduits, or to
interfere with chassis removal.
ACOUSTIC RETURN AIR (RA) PANEL
RA panels are painted standard appliance white. Care-
fully unpack RA panels from their shipping box. RA
panels with optional key locks require the key locks
to be field installed to the slot in the panel door. ADA
RA door panels come with an opening and pilot holes
mounting a thermostat. The ADA harness for wiring
the thermostat and connecting to the unit is shipped
loose with the thermostats.