Johnson Controls DSH024C Series Owner's manual

MODEL DSH024C–120C
HORIZONTAL R-410A AIR CONDITIONING UNITS
C GENERATION
SMART EQUIPMENT CONTROLLER
Issue Date:
April 8, 2019
AIR-COOLED SELF-CONTAINED UNITS
INSTALLATION, OPERATION, MAINTENANCE Supersedes: 145.32-IOM5 (818) Form 145.32-IOM5 (419)
LD2897

2
FORM 145.32-IOM5
ISSUE DATE: 04/08/2019
This equipment is a relatively complicated apparatus.
During rigging, installation, operation, maintenance,
or service, individuals may be exposed to certain com-
ponents or conditions including, but not limited to:
heavy objects, refrigerants, materials under pressure,
rotating components, and both high and low voltage.
Each of these items has the potential, if misused or
handled improperly, to cause bodily injury or death. It
is the obligation and responsibility of rigging, instal-
lation, and operating/service personnel to identify and
recognize these inherent hazards, protect themselves,
and proceed safely in completing their tasks. Failure
to comply with any of these requirements could result
in serious damage to the equipment and the property in
IMPORTANT!
READ BEFORE PROCEEDING!
GENERAL SAFETY GUIDELINES
which it is situated, as well as severe personal injury or
death to themselves and 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 145.32-IOM5
ISSUE DATE: 04/08/2019
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
Mobile Access Portal Gateway Product Bulletin LIT-12011884
Airside Economizer Kit for Models DSH/DSV Air Cooled Air Conditioning Units, C Generation,
Installation and Operation Instructions 145.10-NO2
Low Ambient Damper Kit for Air-Cooled Self-Contained Units DSH/DSV Models, B/C Styles,
Installation and Operation Instructions 145.10-IOM4
DSV/DSH and CSV Air and Water-Cooled Self-Contained Units Start-Up and Performance
Checklist 145.13-CL1
Variable Frequency Drive for D-Series (DSV/DSH) Air-Cooled Self-Contained Units, B Style
and C-Series (CSV) Water-Cooled Self-Contained Units, B Style 145.13-NO1
Smart Equipment Controls (SEC) Parameters for DSH Units, Style C 145.32-IOM5 (LS01)
General Piping Recommendations and Refrigerant Line Length for Split-System Air
Conditioners and Heat Pumps 247077-UAD-H-0209
TECHNICAL SUPPORT
If Technical Support is required, please contact the
Product Technical Support team at 877-329-7430 or
AppliedDXT[email protected].
REPLACEMENT PARTS
For replacement parts, please contact your local
Source1 Dealer.
Source1 Parts Phone Number: 800-536-6112
Source 1 Parts Website: http://www.source1parts.com

4
FORM 145.32-IOM5
ISSUE DATE: 04/08/2019
NOMENCLATURE
MISCELLANEOUS
OPTIONS
A = None
D = Condensate
Overflow Switch
CONTROL OPTIONS
M = Simplicity Microprocessor Controls
S = Smart Equipment (SE) Microprocessor Controls
N = SE Microprocessor Controls with BACnet®
REFRIGERANT CIRCUIT
OPTIONS
A = None
B = Hot Gas Bypass
PRODUCT CATEGORY
DS = Integral Air-Cooled
Packaged A/C, R-410A
PRODUCT IDENTIFIER
H = Horizontal, Ceiling Mounted
DESIGN SERIES
C = Current
VOLTAGE
2 = 208/230-60-3
4 = 460-60-3
5 = 575-60-3
NOMINAL CAPACITY
024 = 2 Ton
036 = 3 Ton
048 = 4 Ton
060 = 5 Ton
096 = 8 Ton
120 = 10 Ton
OUTDOOR FAN OPTIONS
1 = Standard
2 = High Static
3 = Standard with Low Ambient
Control VFD***
4 = High Static with Low Ambient
Control VFD***
INDOOR AIRSIDE OPTIONS
A = Standard AirsideCoil
C = Corrosion Protective Coating
D = Stainless Steel Drain Pan
F = Coated Coil with Stainless Steel Drain Pan
HEATING OPTIONS
0 = None
INDOOR FAN OPTIONS
1 = Standard*
2 = High Static*
3 = Standard with VFD (VAV)**
4 = High Static with VFD (VAV)**
5 = Standard with VFD Discrete Speeds**
6 = High Static with VFD Discrete Speeds**
*Evaporator and condenser motor VFD available only on 8 tons and up. Evaporator motor without VFD available only on 2, 3, 4, and 5 tons.
**Evaporator motor VFD standard on 8 tons and up.
***Condenser and motor VFD available only on 8 tons and up.
CABINET CONFIGURATION
P = Single Package (Standard)
S = Factory-Split (Charged R-410A)
N = Factory-Split (Nitrogen Charge Only)
OUTDOOR AIRSIDE OPTIONS
A = Standard Airside Coil
C = Corrosion Protective Coating
1, 2 3 4, 5, 6 7 8 9 10 11 12 13 14 15 16 17
DS H 120 C 2 S 1 P A A 1 A 0 A

5
FORM 145.32-IOM5
ISSUE DATE: 04/08/2019
SECTION 1 – INSTALLATION..................................................................................................................................9
Pre-Installation Inspection of Equipment..........................................................................................................9
Rigging ....................................................................................................................................................9
Installation Site ...............................................................................................................................................10
Location.................................................................................................................................................10
Cabinet Configuration Options .......................................................................................................................10
Unit Mounting .................................................................................................................................................10
Separation of the Units................................................................................................................................... 11
Separating the Units..............................................................................................................................12
Interconnecting Refrigerant Tubing ................................................................................................................15
Dimensional Data ...........................................................................................................................................16
Typical Service Clearances ...................................................................................................................20
Unit Corner Weights ..............................................................................................................................22
Ductwork ........................................................................................................................................................23
Louver Sizing Guidelines.......................................................................................................................23
Electrical Wiring..............................................................................................................................................23
Packaged Unit .......................................................................................................................................24
Split System ..........................................................................................................................................24
Low Voltage Wiring.........................................................................................................................................24
Typical Wiring Schematics ....................................................................................................................24
Fan Performance ...........................................................................................................................................28
Motor and Pulley Data....................................................................................................................................32
Blower Speed Adjustment ..............................................................................................................................34
Adjusting the Blower Speed ..................................................................................................................34
Low Ambient Damper .....................................................................................................................................34
Airside Economizer (ASE)..............................................................................................................................36
Sequences of Operation........................................................................................................................36
Air Temperature Sensors................................................................................................................................37
Variable Frequency Drive (VFD).....................................................................................................................37
Indoor Fan VFD.....................................................................................................................................37
Outdoor Fan VFD (208-230V and 460V Only) ......................................................................................38
Hot Gas Bypass (HGBP)................................................................................................................................38
TABLE OF CONTENTS

6
FORM 145.32-IOM5
ISSUE DATE: 04/08/2019
SECTION 2 – STARTUP AND OPERATION ..........................................................................................................39
Checking Superheat and Subcooling ....................................................................................................39
Startup (Cooling) ...................................................................................................................................40
Microprocessor Controller ..............................................................................................................................41
Temperature Sensors ............................................................................................................................41
USB Port ...............................................................................................................................................41
LCD Display ..........................................................................................................................................41
Safety Monitoring ..................................................................................................................................41
Low Ambient..........................................................................................................................................41
Anti-Short Cycle Delay (ASCD) Protection............................................................................................41
Fan Delays ............................................................................................................................................41
Nuisance Trip Protection and Three Strikes..........................................................................................41
Lead-Lag ...............................................................................................................................................41
Condensate Overow Switch ................................................................................................................42
Operation...............................................................................................................................................42
SECTION 3 – MAINTENANCE AND SERVICE......................................................................................................43
Evaporator and Condenser Coils ...................................................................................................................43
Refrigerant Circuits ........................................................................................................................................ 43
Blowers ..........................................................................................................................................................43
Drive Belts .....................................................................................................................................................43
Filters..............................................................................................................................................................43
APPENDIX: WIRING DIAGRAMS..........................................................................................................................45
R-410A QUICK REFERENCE GUIDE ....................................................................................................................51

7
FORM 145.32-IOM5
ISSUE DATE: 04/08/2019
FIGURE 1 - Securing Straps and Brackets ............................................................................................................. 10
FIGURE 2 - Self-Sealing Refrigerant Couplings...................................................................................................... 11
FIGURE 3 - Packaged Unit With Couplings ............................................................................................................12
FIGURE 4 - Single Compressor Unit – Typical Installation Conguration ............................................................... 13
FIGURE 5 - Dual Compressor Unit – Typical Installation Conguration..................................................................14
FIGURE 6 - DSH024C And DSH036C Dimensional Data: 2–3 Ton Horizontal A/C Unit.........................................16
FIGURE 7 - DSH048C And DSH060C Dimensional Data: 4–5 Ton Horizontal A/C Unit.........................................17
FIGURE 8 - DSH096C Dimensional Data: 8 Ton Horizontal A/C Unit .....................................................................18
FIGURE 9 - DSH120C Dimensional Data: 10 Ton Horizontal A/C Unit ...................................................................19
FIGURE 10 - 2–5 Ton Horizontal A/C Unit Service Clearances ..............................................................................20
FIGURE 11 - 8 and 10 Ton Horizontal A/C Unit Service Clearances.......................................................................21
FIGURE 12 - Packaged Unit Installation .................................................................................................................22
FIGURE 13 - Split Unit Installation ..........................................................................................................................22
FIGURE 14 - Typical Control Diagram for One and Two Stage Cooling (DSH021C, DSH036C,
DSH048C, and DSH060C) ................................................................................................................24
FIGURE 15 - Typical Control Diagram for Three Stage Cooling (DSH096C).......................................................... 25
FIGURE 16 - Typical Control Diagram for Three Stage Cooling (DSH120C).......................................................... 26
FIGURE 17 - Low Ambient Damper ........................................................................................................................35
FIGURE 18 - RAT SAT Sensor................................................................................................................................37
FIGURE 19 - Extension Wiring................................................................................................................................37
FIGURE 20 - Belt Tension Adjustment ....................................................................................................................43
FIGURE 21 - DSH024–060C High Voltage Wiring Diagrams..................................................................................45
FIGURE 22 - DSH096/120C High Voltage Wiring Diagrams...................................................................................46
FIGURE 23 - DSH024–060C Low Voltage Wiring Diagrams ..................................................................................47
FIGURE 24 - DSH0120C Low Voltage Wiring Diagrams ........................................................................................48
FIGURE 25 - Typical Airside Economizer Wiring Diagram ...................................................................................... 50
LIST OF FIGURES
LIST OF TABLES
TABLE 1 - Operating Weight................................................................................................................................... 11
TABLE 2 - Field Split Coupling Kits.........................................................................................................................12
TABLE 3 - Recommended Refrigerant Line Sizes..................................................................................................15
TABLE 4 - Electrical Data – Standard Evaporator Motor ........................................................................................27
TABLE 5 - Electrical Data – Oversized Evaporator Motor ......................................................................................27
TABLE 6 - Electrical Data – Oversized Condenser Motor ......................................................................................28
TABLE 7 - DSH024C – Supply Air Blower Performance.........................................................................................28
TABLE 8 - DSH024C – Condenser Fan Performance ............................................................................................28
TABLE 9 - DSH036C – Supply Air Blower Performance.........................................................................................28
TABLE 10 - DSH024C – Condenser Fan Performance ..........................................................................................29
TABLE 11 - DSH048C – Supply Air Blower Performance.......................................................................................29
TABLE 12 - DSH048C – Condenser Fan Performance ..........................................................................................29
TABLE 13 - DSH060C – Supply Air Blower Performance.......................................................................................30
TABLE 14 - DSH060C – Condenser Fan Performance ..........................................................................................30
TABLE 15 - DSH096C – Supply Air Blower Performance.......................................................................................30
TABLE 16 - DSH096C – Condenser Fan Performance ..........................................................................................31
TABLE 17 - DSH120C – Supply Air Blower Performance.......................................................................................31
TABLE 18 - DSH120C– Condenser Fan Performance ...........................................................................................31
TABLE 19 - Evaporator – Standard Blower Motor and Drive Data .........................................................................32
TABLE 20 - Evaporator – Oversized Blower Motor and Drive Data........................................................................32
TABLE 21 - Condenser – Standard Blower Motor and Drive Data .........................................................................33
TABLE 22 - Condenser – Oversized Blower Motor and Drive Data........................................................................33
TABLE 23 - Pressure Switch Settings – All Models ................................................................................................39
TABLE 24 - Refrigerant Charge (lbs) ......................................................................................................................39
TABLE 25 - R410A Pressure and Temperature Chart ............................................................................................40
TABLE 26 - Compressor Control ............................................................................................................................42
TABLE 27 - Setpoints and Related Data.................................................................................................................42
TABLE 28 - Filter Sizes...........................................................................................................................................43

8
FORM 145.32-IOM5
ISSUE DATE: 04/08/2019
THIS PAGE INTENTIONALLY LEFT BLANK.

9
FORM 145.32-IOM5
ISSUE DATE: 08/30/2018
1
Models 2–8 tons can be ordered as packaged, factory-
charged unitized packages, or as factory-split. The 10
ton model comes factory-split.
All units are lined with 1/2-inch thick and 2 pound den-
sity acoustical insulation to ensure quiet operation. All
models are provided with medium-efficiency 2-inch
thick throwaway filters rated MERV 7.
The 2–5 ton units use a single scroll compressor. The
8–10 ton units use a dual scroll compressor with two
independent refrigerant circuits. The 8 ton unit uses one
single speed scroll compressor and one two-stage scroll
compressor, giving the unit three effective cooling stages.
The 10 ton unit features two 2 stage compressors, which
allows for four stage cooling.
All units come standard with a Smart Equipment (SE)
microprocessor control board with safety controls and
troubleshooting LEDs (see Microprocessor Controller
on page 41 for more details).
Units operate reliably at outdoor ambient down to
50.0°F. In applications requiring operation below this
temperature, either a low ambient damper field kit ac-
cessory or low ambient control featuring a variable
frequency drive (VFD) on condenser fan is available
(condenser fan VFD is available as a factory installed
option only on 8 and 10 ton units).
The damper is installed on the condenser air discharge
and is allowed operation to 0.0°F ambient.
The VFD on the condenser is factory installed on the
corner post in the condenser section of the unit. The
VFD on the condenser allows operation to 0.0°F ambi-
ent, which is needed to maintain a proper refrigerant
head pressure.
Only qualied personnel should perform
installation and service of this equipment.
PRE-INSTALLATION INSPECTION OF
EQUIPMENT
All units are factory tested to ensure safe operation and
quality assembly. The units are packaged and sealed
on shipping skids and ship in first class condition. Re-
port to the carrier any torn or broken packaging, or
scratched or dented panels.
Prior to installation, internally inspect all units. Re-
move all the access doors and check for visual defects
that can occur during transport. Any problems found
internally should be immediately reported to the carrier
and the manufacturer. Check the refrigerant circuit to
ensure no leaks have occurred during shipment.
Install the gauge set to high and low pressure ports to
confirm the pressure has been maintained and no leaks
have occurred during shipment. To ensure safe opera-
tion, repair any damage.
Record any unit damage on the Bill of
Lading and report to carrier and factory
immediately. Shipping and handling dam-
ages are not warranty items.
Prior to mounting unit, check individual
unit weights (Table 1 on page 11) and
verify lifting capacity of lifting equipment
exceeds weight of units by safe margins.
Failure to do so may result in unit dam-
age, personal injury, or even death.
Rigging
To ensure safe installation of the unit when a ceiling
mount application is specified, estimate the unit's ap-
proximate center of gravity. The configuration of in-
ternal components for each unit is different and the
weight is unevenly distributed.
Determine the actual center of gravity of
the unit by performing a test lift. Lifting
an unbalanced unit can cause personal
injury, or even death.
SECTION 1 – INSTALLATION

10
FORM 145.32-IOM5
ISSUE DATE: 04/08/2019
SECTION 1 – INSTALLATION
INSTALLATION SITE
Lock all electrical power supply switches in
the off position before installing the unit.
Failure to disconnect the power supply may
result in electrical shock or even death.
Location
To ensure the unit operates at maximum efficiencies,
choose a dry indoor area where the temperature is con-
trolled between 50.0°F and 115.0°F. When choosing
a location to install the unit, consider the surrounding
area. Occupants may object to common vibration and
sound levels associated with the unit.
Failure to allow adequate space between
units, condenser intake, and discharge
can result in poor unit performance and
possible unit failure.
Install thermostats, air supplies, and returns so that
each unit operates only on an individual unit control.
To assure fast drainage of the condensate run-off, the
unit can be slightly pitched in the same direction as the
drain pan outlet.
CABINET CONFIGURATION OPTIONS
Horizontal units have two parts: an evaporator and a
condenser section. To minimize installation costs and
delays onsite, it is recommended to order the units in
the appropriate configuration. Units 2–8 tons can be
ordered from the factory as either packaged or split.
The 10 ton unit only comes factory-split.
Here are examples of cabinet configurations. See Nomen-
clature on page 4 for other available options:
PApplies to only 2–8 ton models. The unit comes
assembled as a packaged unit and factory-
charged with R-410A refrigerant.
P is ideal for installations where the unit is in-
stalled as a packaged system. While moving the
equipment into position or during installation,
no separation is required.
SThe unit is factory-split and factory-charged with
R-410A refrigerant. The unit comes with refrig-
erant shut-off/coupling valves that hold charge
in both the condenser and evaporator sections.
S is ideal for installations where the unit is in-
stalled as a packaged system. Separate evapora-
tor and condenser sections are required during
installation to move the equipment through tight
spaces (for example, hallways or elevators).
Both evaporator and condenser sections contain
R-410A refrigerant.
NThe unit is factory-split with a nitrogen-holding
charge only. No refrigerant shut-off/coupling
valves are included.
N is for installations where the unit is installed as
a split system. Separate condenser and evapora-
tor sections facilitate moving the equipment into
position.
UNIT MOUNTING
Flanges for all duct connections, corner securing
brackets, and refrigerant tubing couplings (S cabinet
configurations only) ship in the condensing section of
the unit for field installation. Duct flanges for evapora-
tor return are incorporated into the filter rack.
Before assembling and piping the units, remove the tie-
down straps and brackets from the refrigerant piping and
couplings. See Figure 1 (8 and 10 ton models are shown).
LD27691, LD27692
FIGURE 1 - SECURING STRAPS AND BRACKETS

11
SECTION 1 – INSTALLATION
FORM 145.32-IOM5
ISSUE DATE: 04/08/2019
1
TABLE 1 - OPERATING WEIGHT
UNIT OPERATING
WEIGHT
(CONDENSER ONLY)
SHIPPING WEIGHT
(CONDENSER
ONLY)
DSH024C 675 (390) 715 (430)
DSH036C 680 (400) 720 (440)
DSH048C 955 (568) 1015 (608)
DSH060C 995 (593) 1065 (633)
DSH096C 1470 (815) 1560 (855)
DSH120C 1800 (1020) 1870 (1060)
NOTE
All weights are in lbs.
Units may be either hung or floor mounted. If the unit
is hung, use all the indicated mounting points, whether
the unit is installed as a package or split system (see
Figure 4 on page 13 and Figure 5 on page 14).
Hanger rods with a minimum 1/2-inch diameter are
strongly recommended.
Ensure the attachment point of the rods to the build-
ing structure is sufficient to support the unit weight. To
ensure efficient condensate drainage, the unit can be
pitched towards the evaporator end of the unit.
A minimum of 4-inch clearance is required under the
unit to allow for trapping of the evaporator condensate
drain. See Typical Service Clearances on page 20
for more unit clearance information.
SEPARATION OF THE UNITS
All models can be ordered with refrigerant shut-off valves
or couplings. These components allow the evaporator and
condenser sections to ship factory-split. The evaporator
and condenser can then be assembled onsite without re-
quiring the entire unit refrigerant charge be reclaimed.
The 2–5 ton models are available with shut-off valves.
The 8 and 10 ton models are available with self-sealing
brass refrigerant couplings. A field-split coupling kit
is available for field-split applications of 8 and 10 ton
models ordered with couplings. Refer to General Piping
Recommendations and Refrigerant Line Lengths (Form
247077-UAD-H-0209).
The male coupling is fastened to the condenser wall via a
mounting bracket. The 8 ton unit ordered as a single pack-
aged unit can be field split. To separate the couplings with-
out stressing the refrigerant piping, use a backup wrench
on the female coupling (see Figure 3 on page 12).
LD27693
FIGURE 2 - SELF-SEALING REFRIGERANT
COUPLINGS

12
FORM 145.32-IOM5
ISSUE DATE: 04/08/2019
SECTION 1 – INSTALLATION
LD27694
FIGURE 3 - PACKAGED UNIT WITH COUPLINGS
Once the couplings are unscrewed, the female coupling
can be pulled away and allowed to rest in the open-
ing. No loss of refrigerant occurs due to the spring-seal
mechanism in the couplings.
Separating the Units
The evaporator and condenser sections can be separated
by performing the following procedures. These proce-
dures are for the 2–8 ton capacities only. On the 8 ton
model, unscrew all four couplings (Figure 3) with the
aid of a backup wrench to separate the unit.
1. For 2–5 ton models, close all of the refrigerant iso-
lation valves on the suction, liquid, and hot gas
bypass line (if applicable). Valves are not a back-
seating design. Caps are wrench tight.
2. Remove the caps and turn the valve stem clockwise
to seat the valve in the closed position.
3. For 2–5 ton models, use the valve access ports
to reclaim the refrigerant trapped in the lines be-
tween the pairs of shut-off valves.
Use a TUBING CUTTER ONLY - do not
use hacksaws to cut refrigerant tubing.
Otherwise, serious damage can occur to
refrigeration system.
4. For 2–5 ton models, cut the refrigerant line sections
between the pairs of shut-off valves.
It is recommended to make this cut where accessi-
bility is greatest - in the condensing section of the
unit. This allows the best access for reconnection
or attachment of an extended line set in the case
of a split system.
5. Remove the interconnecting wiring between the
evaporator and condenser electrical panel. Dis-
connect the wire terminations in the condenser
electrical panel, and pull the excess wire into the
evaporator panel.
6. Remove the threaded wire bushing connecting the
two electrical panels.
7. Remove the unit top-joining strip. Take care to
remove only those screws that attach the joining
strip to the evaporator and condenser cabinets.
8. Remove the two side cross-member angles.
9. Carefully pull the evaporator section away from
the condenser section. Take care not to damage
the short lengths of refrigerant tubing extending
into the condenser section.
The separated evaporator and condenser modules can
now be individually moved to the desired location for
re-assembly or separately located for split applica-
tions. Splitting units with couplings requires a mating
coupling kit. See Table 2. For split installations, the
cross member angles must be field cut for each section
length and re-attached.
TABLE 2 - FIELD SPLIT COUPLING KITS
MODEL NUMBER PART NUMBER
DSH096C***P/DSH096C***S DSH096B-SPLIT-KIT
DSH096C***P/DSH096C***S
with Hot Gas Bypass (HGBP) DSH096B-SPLIT-HGBP
DSH120C***S DSH120B-SPLIT-KIT
DSH120C***S with HGBP DSH120B-SPLIT-HGBP
The couplings must be protected from any
foreign material, dust, or debris if they are
left uncapped for any extended period of
time.

13
SECTION 1 – INSTALLATION
FORM 145.32-IOM5
ISSUE DATE: 04/08/2019
1
LD27695
FIGURE 4 - SINGLE COMPRESSOR UNIT – TYPICAL INSTALLATION CONFIGURATION
Horizontal
Ductable Ceiling Air Conditioner Packaged Installation
Horizontal
Ductable Ceiling Air Conditioner Split Installation
Condenser
Section
Top Joining Strip
Evaporator Section
Side Cross-Member Angle
Ceiling
Exhaust
Outdoor
Air Intake
Condenser Section
Evaporator Section
Supply
Return

14
FORM 145.32-IOM5
ISSUE DATE: 04/08/2019
SECTION 1 – INSTALLATION
LD27696
FIGURE 5 - DUAL COMPRESSOR UNIT – TYPICAL INSTALLATION CONFIGURATION
Ductable Ceiling Air Conditioner Split Installation
Horizontal
Horizontal
Ductable Ceiling Air Conditioner Packaged Installation
Condenser Section
Evaporator Section
Supply Air
Return Air
Outdoor Air
Intake
Exhaust
Ceiling
Floor
Condenser Section
Evaporator Section
Ceiling
Floor
Return Air
Supply Air

15
SECTION 1 – INSTALLATION
FORM 145.32-IOM5
ISSUE DATE: 04/08/2019
1
When brazing couplings, ensure the following:
1. When applying paste ux to the copper tube,
avoid applying excessive amounts. This prevents
ux running inside the coupling where it can
cause corrosion and damage.
2. Immerse the coupling in a cold water bath, ensur-
ing the diaphragm (threaded) is fully immersed.
3. Double-tipped torches are recommended to re-
duce brazing time. After brazing, quench the cou-
plings to reduce the temperature.
When assembling the couplings ensure the following:
1. Use clean oil.
2. The refrigerant oil is applied to the entire diaphragm
surface, O-ring, and threaded male coupling end.
3. Before starting the threads of the female coupling
nut onto the male half, coupling halves must be held
in proper alignment with each other. Thread by hand
the rst three rotations of the union nut. If the nut
does not start by hand, adjust the position of the line
set or, if necessary, the unit module's position.
4. Use a backup wrench to tighten the female union
nut until a denite increase in resistance is felt. At
this point, most of threads have been covered by
the nut. Ensure that the female and male bodies do
not rotate at any point in the wrench installation.
5. Make a note of the location of the female nut to
the bulkhead. Use a marker or scribe to mark a line
lengthwise. Finally, tighten an additional one wrench
at or 60°. This nal tightening is necessary to en-
sure a proper leakproof seal between the couplings.
INTERCONNECTING REFRIGERANT TUBING
After the evaporator and condenser sections are mounted,
the interconnecting refrigerant tubing can be fabricated.
For cooling systems where the indoor and outdoor sec-
tions are installed at the same elevation, the refrigerant
line sizes usually can be matched with factory supplied
fittings. See Table 3.
There are exceptions for total line lengths
exceeding 75 feet where pressure drop
limitations are exceeded. For further
information, refer to General Piping
Recommendations and Refrigerant Line
Length (Form 247077-UAD-H-0209).
The following guidelines apply to field fabricated piping:
• Use hard drawn refrigeration type copper tubing
where no appreciable amount of bending around
pipes or obstructions is necessary. If soft copper
must be used, take care to avoid sharp bends that
may cause a restriction. Route refrigerant tubing for
minimum linear length and minimum number of
bends and ttings. The use of long radius elbows for
all 90° bends is recommended.
• Braze all copper to copper joints with brazing rod
high in silver or equivalent brazing material. DO
NOT USE SOFT SOLDER.
• During brazing operations, ow an inert gas such
as nitrogen through the system to prevent internal
scaling and contamination.
If the piping is properly sized, traps are not required.
They only increase the pressure drop across the sys-
tem, further reducing capacity.
Once the brazing operation of refrigeration lines is com-
pleted, the field-brazed connections must be checked for
leaks:
1. Pressurize the system with clean nitrogen 200 and
400 psig.
2. Monitor the pressure for 15–30 minutes. Use soap
bubbles or alternate methods of leak-checking for
all eld brazed joints.
3. After completing the leak check, evacuate the in-
terconnecting lines to hold a 350-micron vacuum
for 15–30 minutes.
If gauge pressure rises above 500 microns in one
minute, then evacuation is incomplete or the sys-
tem has a leak.
TABLE 3 - RECOMMENDED REFRIGERANT LINE
SIZES
MODEL # LESS THAN 75 LINEAR FEET1
LIQUID LINE SUCTION LINE
DSH024C 3/8 3/4
DSH036C 3/8 3/4
DSH048C 1/2 7/8
DSH060C 1/2 7/8
DSH096C 2 X 1/2 2 X 7/8
DSH120C 2 X 1/2 2 X 7/8
NOTE
Measurements are in inches

16
FORM 145.32-IOM5
ISSUE DATE: 04/08/2019
SECTION 1 – INSTALLATION
DIMENSIONAL DATA
NOTES:
1. Dimension tolerance is 1/16 inch
2. Evaporator and condenser duct connections cannot be altered unless noted.
LD27697
FIGURE 6 - DSH024C AND DSH036C DIMENSIONAL DATA: 2–3 TON HORIZONTAL A/C UNIT
14.00
6.57
Evaporator Section
Electrical Box Access
Condenser Section
Electrical Box Access
Low Voltage
Connection
Electrical Power
Connection
Front
Evaporator
Fan Access Condenser
Fan Access
Condenser Openings
Evaporator
Fan Access
Condenser
Fan Access
Back
Evaporator
Openings
0.75-inch NPT
Drain Connection
Optional Condenser
Intake (Field Convertible)
Evaporator
Section
Condenser
Section
Optional Return Air (Field
Convertible)
Front
4.75 26.00
16.00
7.75
17.507.00 1.00
23.75
2.38
23.13
2.75
25.63
2.70 7.18
23.75
13.25
78.19
Condenser
Intake
Condenser
Discharge
61.00
Return Air
Supply Air
58.50 C.C.
56.00
71.88
29.00 C.C. 38.00 C.C.
30.50
Front

17
SECTION 1 – INSTALLATION
FORM 145.32-IOM5
ISSUE DATE: 04/08/2019
1
NOTES:
1. Dimension tolerance is 1/16 inch
2. Evaporator and condenser duct connections cannot be altered unless noted.
LD27698
FIGURE 7 - DSH048C AND DSH060C DIMENSIONAL DATA: 4–5 TON HORIZONTAL A/C UNIT
Evaporator Section
Electrical Box Access
Condenser Section
Electrical Box Access
Low Voltage
Connection
Electrical Power
Connection
Front
Evaporator
Fan Access Condenser
Fan Access
Condenser Openings
Evaporator
Fan Access
Condenser
Fan Access
Back
Evaporator
Openings
0.75-inch NPT
Drain Connection
Optional Condenser
Intake (Field Convertible)
Evaporator
Section
Condenser
Section
Optional Return Air
(Field Convertible)
Front
16.00
8.13
4.75 28.00
18.50
8.75
17.5010.12 1.00
26.75
2.38
23.13
4.25
29.38
3.00 9.73
2.38
27.50
15.00
86.19
Condenser
Intake
Condenser
Discharge
69.10
Return Air
Supply Air
66.50 C.C.
64.00
80.50
35.62 C.C. 40.00 C.C.
Front

18
FORM 145.32-IOM5
ISSUE DATE: 04/08/2019
SECTION 1 – INSTALLATION
NOTES:
1. Dimension tolerance is 1/16 inch
2. Evaporator and condenser duct connections cannot be altered unless noted.
LD27699
FIGURE 8 - DSH096C DIMENSIONAL DATA: 8 TON HORIZONTAL A/C UNIT
0.75-inch NPT
Drain Connection
1.00
85.21
8.56
1.56
8.56
38.13 23.88
48.00
4.94
106.13
48.00 C.C. 52.00 C.C. 2.94
82.50
33.38
30.13
29.38
10.88 10.88
10.88
2.25
20.94
2.63
Evaporator Section Condenser Section
Evaporator Section Condenser Section
112.00
39.88
Evaporator
Opening
Compressor
Access Panel
Condenser
Blower Drive
Access Panel
Compressor Section
Electrical Box Access
Evaporator Section
Electrical Box Access
Evaporator
Blower Drive
Access Panel
Condenser Opening
Filter Access
(Both Sides)
TX Valve and Filter
Drier Access Panel
Return Air
Supply Air
Condenser
Discharge
Front View
Back View
Top View
Condenser Intake
112.00
4.75 25.00 17.00
1.25 80.00

19
SECTION 1 – INSTALLATION
FORM 145.32-IOM5
ISSUE DATE: 04/08/2019
1
NOTES:
1. Dimension tolerance is 1/16 inch
2. Evaporator and condenser duct connections cannot be altered unless noted.
LD27700
FIGURE 9 - DSH120C DIMENSIONAL DATA: 10 TON HORIZONTAL A/C UNIT
41.79
55.00 C.C. 65.00 C.C.
60.88 70.88
2.94
11.26
20.521.58
1.25
33.25
1.25
1.08
21.27
89.10
86.50
0.75-inch NPT Drain
Connection
2.20 30.10
1
4.70 Evaporator Section
Electrical Box
Access
Front View Right View
Back View Left View
Top View
Evaporator Blower Drive
Access Panel Condenser Discharge Condenser Blower
Drive Access Panel
Condenser
Access Panel
Service Hose
Access
Compressor Section
Electrical Box Access
TX Valve and Filter
Drier Access Panel
Power
Connection
Evaporator Discharge
Evaporator Intake
Sight Glass
View Access
Condenser Intake
Filter Access
(Both Sides)
Evaporator
Section
Condenser
Section
Condenser
Intake
Condenser
Discharge
Return Air
Supply Air
84.00
70.88
60.88
61.00 38.10
48.20
4.94
2.50 29.35

20
FORM 145.32-IOM5
ISSUE DATE: 04/08/2019
SECTION 1 – INSTALLATION
Typical Service Clearances
LD27701
FIGURE 10 - 2–5 TON HORIZONTAL A/C UNIT SERVICE CLEARANCES
Front
Return Air
Supply Air
Evaporator Section Condenser Section
Condenser
Intake
Condenser
Discharge
36 Inch Minimum Clearance
36 Inch Minimum Clearance
Evaporator
Fan Access
Condenser
Fan Access
4 Inch Minimum Clearance
(for Drain Trap)