Goodman DTC036 Installation Manual
INSTALLATION INSTRUCTIONS
DTC/DTH SERIES
LIGHT COMMERCIAL PACKAGED HEATING AND COOLING UNIT
3 TO 6 TON
ATTENTION INSTALLING PERSONNEL:
Prior to installation, thoroughly familiarize yourself with
this Installation Manual. Observe all safety warnings. During installation or repair, caution is to be observed.
It is your responsibility to install the product safely and to
educate the customer on its safe use.
Index
Replacement Parts................................................................ 2
Safety Instructions................................................................ 2
General Information ............................................................. 2
Unit Location ........................................................................ 3
Clearances ............................................................................ 4
Roof Curb Post-Installation Checks ....................................... 5
Roof Top Duct Connections ................................................... 5
Rigging Details ...................................................................... 5
Electrical Wiring.................................................................... 6
Circulating Air and Filters...................................................... 8
Condensate Drain Connection ..............................................8
Startup, Adjustments, and Checks ........................................ 9
Air Flow Adjustments .........................................................10
Heat Pump Operation......................................................... 11
Maintenance ......................................................................12
Troubleshooting.................................................................. 12
Appendix A Blower Performance Tables ............................. 14
Direct Drive ....................................................................1 4
Standard Down Shot and Horizontal .......................... 14
Standard DTC/DTH060 Down Shot ............................. 16
RECOGNIZE THIS SYMBOL
AS A SAFETY PRECAUTION.
These installation instructions cover the outdoor installation of
single package heating and cooling units. See the Specification
Sheet applicable to your model for information regarding
accessories.
*NOTE: Please contact your distributor or our website for the
applicable Specification Sheet referred to in this manual.
IOD-1016
3/2015
Our continuing commitment to quality products may mean a change in specifications without notice.
© 2015
5151 San Felipe St., Suite 500, Houston, TX 77056
www.daikincomfort.com
Appendix B Electrical Data.................................................. 18
Appendix C Unit Dimensions............................................... 19
WIRING DIAGRAMS ............................................................ 20
DTC0[36-60]XXX1DXXX...............................................20
DTH0[36-60]XXX1DXXX .............................................. 21
START-UP CHECKLIST........................................................... 22
REPLACEMENT PARTS
ORDERING PARTS
When reporting shortages or damages, or ordering repair
parts, give the complete unit model and serial numbers as
stamped on the unit’s nameplate.
Replacement parts for this appliance are available through
your contractor or local distributor. For the location of your
nearest distributor, consult the white business pages, the
yellow page section of the local telephone book or contact:
CONSUMER AFFAIRS
DAIKIN NORTH AMERICA LLC
7401 SECURITY WAY
HOUSTON, TEXAS 77040
855-770-5678
SAFETY INSTRUCTIONS
TO THE INSTALLER
Before installing this unit, please read this manual to
familiarize yourself on the specific items which must be
adhered to, including maximum external static pressure to
unit, air temperature rise, minimum or maximum CFM and
motor speed connections.
Keep this literature in a safe place for future reference.
CAUTION
WA RNING
T
HIS UNIT MUST NOT BE USED AS A “CONSTRUCTION HEATER
DURING THE FINISHING PHASES OF CONSTRUCTION ON A NEW
STRUCTURE
OF THE UNIT DUE TO EXTREMELY LOW RETURN AIR TEMPERATURES
AND EXPOSURE TO CORROSIVE OR VERY DIRTY ATMOSPHERE S
. T
HIS TYPE OF USE MAY RESULT IN PREMATURE FAILURE
”
.
WARNING
HIGH VOL TAGE!
D
ISCONNECT ALL POWER BEFORE SERVICING OR
INSTALLING THIS UNIT
BE PRESENT
DAMAGE, PERSONAL INJURY OR DEATH
. F
. M
AILURE TO DO SO MAY CAUSE PROPERTY
ULTIPLE POWER SOURCES MAY
.
WARNING
TO PREVENT THE RISK OF PROPERTY DAMAGE, PERSONAL INJURY, OR DEATH,
DO NOT STORE COMBUSTIBLE MATERIALS OR USE GASOLINE OR OTHER
FLAMMABLE LIQUIDS OR VAPORS IN THE VICINITY OF THIS APPLIANCE.
WARN ING
HIGH VOLTAGE!
INSTALLATION AND REPAIR OF THIS UNIT SHOULD BE
PERFORMED
MINIMUM) THE REQUIREMENTS OF AN
T
ECHNICIAN” AS SPECIFIED BY THE AIR CONDITIONING
HEATING AND REFRIGERATION INSTITUTE
TTEMPTING TO INSTALL OR REPAIR THIS UNIT WITHOUT
A
SUCH BACKGROUND MAY RESULT IN PRODUCT DAMAGE
PERSONAL INJURY OR DEATH
ONLY BY
INDIVIDUALS MEETING(AT A
“E
NTRY LEVEL
(AHRI).
.
,
,
S
HEET METAL PARTS, SCREWS, CLIPS AND SIMILAR ITEMS INHERENTLY
HAVE SHARP EDGES, AND IT IS NECESSARY THAT THE INSTALLER AND
SERVICE PERSONNEL EXERCISE CAUTION
.
W ARNING
T
HIS PRODUCT CONTAINS OR PRODUCES A CHEMICAL OR CHEMICALS
WHICH MAY CAUSE SERIOUS ILLNESS OR DEATH AND WHICH ARE
KNOWN TO THE STATE OF CALIFORNIA TO CAUSE CANCER, BIRTH
DEFECTS OR OTHER REPRODUCTIVE HARM
.
WARNING
TO
AVOID PROPERTY DAMAGE, PERSONAL INJURY OR DEATH, DO
NOT USE THIS UNIT IF ANY PART HAS BEEN UNDER WATER
I
MMEDIATELY CALL A QUALIFIED SERVICE TECHNICIAN TO INSPECT
THE FURNACE AND TO REPLACE ANY PART OF THE CONTROL SYSTEM
AND ANY GAS CONTROL HAVING BEEN UNDER WATER
.
.
GENERAL INFORMA TION
W ARNING
TO
PREVENT PROPERTY DAMAGE PERSONAL INJURY OR DEATH, DUE
TO FIRE, EXPLOSIONS, SMOKE, SOOT, CONDENSATION, ELECTRIC
SHOCK OR CARBON MONOXIDE, THIS UNIT MUST BE PROPERLY
INSTALLED, REPAIRED, OPERATED, AND MAINTAINED
.
This unit is approved for outdoor installation ONLY . Rated perf or mance is achieved after 72 hour s of operation. Rated performance
is delivered at the specified airflow. See product specification
sheet for light commercial models. Specification sheets can be
found at www.daikincomfort.com for Daikin brand products.
Within the website, please select the commercial products menu
and then select the submenu for the type of product to be installed, such as air conditioners or heat pumps, to access a list of
product pages that each contain links to that model’s specification sheet.
To assure that your unit operates safely and efficiently, it must be
installed, operated, and maintained in accordance with these installation and operating instructions, all local building codes and
ordinances.
2
EPA REGULATIONS
IMPORTANT: THE UNITED STATES ENVIRONMENTAL PROTECTION AGENCY (EPA)
HAS ISSUED VARIOUS REGULATIONS REGARDING THE INTRODUCTION AND DISPOSAL
OF
REFRIGERANTS IN THIS UNIT. F AILURE TO FOLLOW THESE REGULATIONS MAY HARM
THE ENVIRONMENT AND CAN LEAD TO THE IMPOSITION OF SUBSTANTIAL FINES.
ECAUSE REGULATIONS MAY VARY DUE TO PASSAGE OF NEW LAWS, WE SUGGEST A
B
CERTIFIED
TECHNICIAN PERFORM ANY WORK DONE ON THIS UNIT. SHOULD YOU
HAVE ANY QUESTIONS PLEASE CONTACT THE LOCAL OFFICE OF THE EPA.
NATIONAL CODES
This product is designed and manufactur ed to permit installation
in accordance with National Codes. It is the inst aller’ s r e sponsibility to install the product in accordance with National Codes and/
or prevailing local codes and regulations.
The heating and cooling capacities of the unit should be greater
than or equal to the design heating and cooling loads of the area
to be conditioned. The loads should be calcula te d b y an appr ov e d
method or in accordance with ASHRAE Guide or Manual J - Load
Calculations published by the Air Conditioning Contractors of
America.
Obtain from:
d. Copy of the inspection report issued by carrier
representative at the time damage is reported to the
carrier. The carrier is responsible for making prompt
inspection of damage and for a thorough investigation
of each claim. The distributor or manufacturer will not
accept claims from dealers for transportation damage.
NOTE: When inspecting the unit for transportation damage,
remove all packaging materials. R ecycle or dispose of the packaging
material according to local codes.
PRE-INSTALLATION CHECKS
Carefully rea d all instructions f or the installation prior t o inst alling
unit. Ensure each step or proce dur e is under stood and an y special
considerations are taken into account before starting installation.
Assemble all tools, hardware and supplie s needed to complet e the
installation. Some items may need to be purchased locally.
UNIT LOCATION
WARN ING
American National Standards Institute
1430 Broadway
New York, NY 10018
System design and installation should also, where applicable, follow information pre sented in accept ed industry guides such as the
ASHRAE Handbooks. The manufacturer assumes no r esponsibility
for equipment installed in viola tion of an y c ode or r egula tion. The
mechanical installation of the packaged roof top units consists of
making final connections between the unit and building services;
supply and return duct connections; and drain connections (if required). The internal systems of the unit are completely factoryinstalled and tested prior to shipment.
Units are g ener ally ins t alled on a steel roof mounting curb assembly which has been shipped to the job site for installation on the
roof structure prior to the arrival of the unit. The model number
shown on the unit’s identification plate iden tifies the various components of the unit such as refrigeration tonnage, heating input
and voltage.
Carefully inspect the unit for damage including damage to the
cabinetry . Any bolt s or screws which ma y have loosened in tr ansit
must be re-tightened. In the even t of damage, the receiver should:
1. Make notation on delivery receipt of any visible damage
to shipment or container.
2. Notify carrier promptly and request an inspection.
3. In case of concealed damage, c arrier should be notified as
soon as possible-preferably within 5 days.
4. File the claim with the following supporting documents:
a. Original Bill of Lading, certified copy , or indemnity bond.
b. Original paid freight bill or indemnity in lieu thereof.
c. Original invoice or certified copy thereof, showing trade
and other discounts or reductions.
TO
PREVENT POSSIBLE EQUIPMENT DAMAGE, PROPERTY DAMAGE
PERSONAL INJURY OR DEATH, THE FOLLOWING BULLET POINTS MUST
BE OBSERVED WHEN INSTALLING THE UNIT
.
,
IMPORTANT NOTE: Remove wood shipping rails prior to installation of the unit.
ALL INSTALLATIONS:
I
MPORTANT NOTE: Unit should be energized 24 hours prior to
compressor start up to ensure crankcase heater has sufficiently warmed the compressors. Compressor damage may
occur is this step is not followed.
NOTE: Appliance is shipped from factory for vertical duct
application.
Proper installation of the unit ensur es tr ouble-free operation. Improper installation can result in problems ranging from noisy
operation to property or equipment damages, dangerous conditions that could result in injury or personal property damag e. Give
this booklet to the user and explain it’s provisions. The user should
retain these instructions for future reference.
• For proper operation and condensate drainage, the unit
must be mounted level.
• Do not locate the unit in an area where the outdoor air
will be frequently contaminate d by compounds containing
chlorine or fluorine. Common sources of such compounds
include swimming pool chemicals and chlorine bleaches,
paint stripper, adhesives, paints, varnishe s, sealers, w ax es
(which are not yet dried) and solvents used during
construction and remodeling. Various commercial and
industrial processes may also be sources of chlorine/
fluorine compounds.
• T o avoid possible illness or death of the building occupants,
3
do NOT locate outside air intake device (economizer,
manual fresh air intake, motorized fresh air intake) too
close to an exhaust outlet, gas vent termination, or
plumbing vent outlet. For specific distances required,
consult local codes.
• Allow minimum clearances from the enclosure for fire
protection, proper opera tion, and service access (see Unit
Clearances). These clearances must be permanently
maintained.
• When the unit is heating, the temperature of the return
air entering the unit must be a minimum of 55°F.
GROUND LEVEL INSTALLATIONS ONLY:
• When the unit is installed on the ground adjacent to the
building, a level concrete (or equal) base is recommended .
Prepare a base that is 3” larger than the package unit
footprint and a minimum of 3” thick.
• The base should also be located where no runoff of w at er
from higher ground can collect in the unit.
ROOF TOP INSTALLATIONS ONLY:
• T o a v oid possible property damage or per sonal injury, the
roof must have sufficient structural strength to carry the
weight of the unit(s) and snow or water loads as required
by local codes. Consult a structur al engineer to determine
the weight capabilities of the roof.
• The unit may be installed directly on wood floors or on
Class A, Class B, or Class C roof covering material.
• To avoid possible personal injury, a safe, flat surface for
service personnel should be provided.
• Adequate clearances fr om the unit to any adjacent public
walkways, adjacent buildings, building openings or
openable windows must be maintaine d in accordance with
National Codes.
UNIT PRECAUTIONS
• Do not stand or walk on the unit.
• Do not drill holes anywhere in panels or in the base frame
of the unit (except where indicated). Unit access panels
provide structural support.
• Do not remove any access panels until unit has been
installed on roof curb or field supplied structure.
• Do not roll unit across finished roof without prior approval
of owner or architect.
• Do not skid or slide on any surface as this may damage
unit base. The unit must be store d on a flat, level surf ace.
Protect the condenser coil because it is easily damaged.
ROOF CURB INSTALLATIONS ONLY:
Curb installations must c omply with local codes and should be done
in accordance with the est ablished guidelines of the National R oofing Contractors Association.
shipped unassembled. Field assembly, squaring, leveling and
mounting on the roof structure are the responsibility of the installing contractor. All required hardware necessary for the assembly of the sheet metal curb is included in the curb accessory.
WARN ING
TO
PREVENT POSSIBLE EQUIPMENT DAMAGE, PROPERTY DAMAGE
PERSONAL INJURY OR DEATH, THE FOLLOWING BULLET POINTS MUST
BE OBSERVED WHEN INSTALLING THE UNIT
.
,
• Sufficient structural support must be det ermined prior to
locating and mounting the curb and package unit.
• Ductwork must be constructed using industry guidelines.
The duct work must be placed into the roof curb before
mounting the package unit. Our full perimeter curbs
include duct connection frames to be a ssembled with the
curb. Cantilevered type curbs are not available from the
factory.
• Curb insulation, cant strips, flashing and general roofing
material are furnished by the contractor.
The curbs must be supported on parallel sides by roof members.
The roof members must not penetrate supply and return duct
opening areas as damage to the unit might occur.
NOTE: The unit and curb accessories are de signed to allow v ertical
duct installation before unit placement. Duct inst allation after unit
placement is not recommended.
CAUTION
ALL
CURBS LOOK SIMILAR
POSITIONING, CHECK JOB PLANS CAREFULLY AND VERIFY MARKINGS
ON CURB ASSEMBLY
SUPERSEDES INFORMATION SHOWN
See the manual shipped with the roof curb for assembly and installation instructions.
24”*
Min.
. TO
AVOID INCORRECT CURB
. I
NSTRUCTIONS MAY VARY IN CURB STYLES AND
.
CLEARANCES
24”*
Min.
36”
Min.
Proper unit installation requires that the roof curb be firmly and
permanently attached to the roof structure. Check for adequate
fastening method prior to setting the unit on the curb.
Full perimeter roof curbs are available from the factory and are
UNIT CLEARANCES
*In situations that have multiple units, a 48” minimum clearance is
required between the condenser coils.
Adequate clearance around the unit should be k ept f or safety, ser-
4
vice, maintenance, and proper unit operation. A total clearance
of 75” on the main control panel side of the unit is r ecommende d
to facilitate possible f an shaft, coil, and electric heat. A clearance
of 48” is recommended on all other sides of the unit to facilitate
possible compressor removal, to allow service access and to insure proper ventilation and condenser airflow. The unit must not
be installed beneath an y obs truction. The unit should be installe d
remote from all building exhausts to inhibit ingestion of exhaust
air into the unit fresh air intake.
Refer t o IOD-7006 included in the litera ture pack for inst alling horizontal duct covers.
Flexible duct connectors between the unit and ducts are recommended. Insulate and weatherproof all external ductwork and
joints as required and in accordance with local codes.
11 ” 4 7/8””
REMOVE
COVERS
17” 7 3/8”
INSULATED
PANELS
ROOF CURB INSTALLATION
ROOF CURB POST -INSTALLA TION CHECKS
After installation, check the top of the curb, duct connection fr ame
and duct flanges to make sure gasket has been applied properly.
Gasket should be firmly applied to the top of the curb perimeter,
duct flanges and any exposed duct connection frame. If gasket is
loose, re-apply using strong weather resistant adhesive.
PROTRUSION
Inspect curb to ensure that none of the utility services (electric)
routed through the curb protrude above the curb.
CAUTION
IF
PROTRUSIONS EXIST, DO NO ATTEMPT TO SET UNIT ON CURB
.
ROOF TOP DUCT CONNECTIONS
RETURN
12”
SUPPLY
6 3/16”
HORIZONTAL DISCHARGE DUCT CONNECTIONS
25”
RIGGING DET AILS
WARNING
O PREVENT PROPERTY DAMAGE, THE UNIT SHOULD REMAIN IN AN UPRIGHT
T
POSITION DURING ALL RIGGING AND MOVING OPERATIONS.
LIFTING AND MOVING WHEN A CRANE IS USED, PLACE THE UNIT IN AN
ADEQUATE CABLE SLING.
T
O FACILITATE
CAUTION
IF
UNITS ARE LIFTED TWO AT A TIME, THE FORK HOLES ON THE
CONDENSER END OF THE UNIT MUST NOT BE USED
LENGTH IS
IS RECOMMENDED
42” TO
PREVENT DAMAGE TO THE UNIT; HOWEVER
.
. M
INIMUM FORK
, 48”
Provisions for fork s have been include d in the unit base frame. No
other fork locations are approved.
WARNING
O PREVENT POSSIBLE EQUIPMENT DAMAGE, PROPERTY DAMAGE, PERSONAL
T
INJURY OR DEAT H, THE FOL LOWING BU LLET POINTS MUST BE OB SERVED
WHEN INSTALLING THE UNIT.
• Unit must be lifted by the four lifting holes located at the
base frame corners.
• Lifting cables should be att ached to the unit with shackles.
• The distance between the crane hook and the top of the
unit must not be less than 60”.
• Two spreader bars must span over the unit to prevent
Install all duct connections on the unit before placing the unit on
rooftop.
HORIZONTAL DISCHARGE
5
damage to the cabinet by the lift cables. Spreader bars
must be of sufficient length so that cables do not come in
contact with the unit during transport. Remove wood
struts mounted beneath unit base frame before setting
unit on roof curb. These struts are intended to protect
unit base frame from fork lift damage. Removal is
accomplished by extracting the sheet met al r etainer s and
pulling the struts through the base of the unit. Refer to
rigging label on the unit.
Important: If using bottom discharge with roof curb, ductwork
should be attached to the curb prior t o installing the unit. Ductwork
dimensions are shown in Roof Curb Installation Instructions.
Refer to the Roof Curb Installation Instructions for proper curb
installation. Curbing must be installed in compliance with the National Roofing Contractors Association Manual.
Lower unit carefully onto roof mounting curb. While rigging unit,
center of gravity will cause condenser end t o be lower than supply
air end.
A*
Model
DTC 036* 35 27 571 546 122 165 111 146
D T C 04 8 * 3 5 2 7 5 9 0 5 6 4 13 1 16 7 118 14 8
DT C060* 35 2 7 635 610 14 3 178 126 163
DTH 036* 34 28 581 556 130 175 105 146
D T H 04 8 * 3 4 2 8 6 0 0 5 7 4 13 1 18 1 111 15 1
DTH 060* 34 28 645 620 141 193 121 165
X (in) Y (in)
Shipping
Weight
(lbs)
Operating
Weight
(lbs)
Co rner Weights ( lbs )
ABCD
CAUTION
TO
PREVENT SEVERE DAMAGE TO THE BOTTOM OF THE UNIT, DO NOT
FORK LIFT UNIT AFTER WOOD STRUTS HAVE BEEN REMOVED
.
Bring condenser end of unit into alignment with the curb. With
condenser end of the unit resting on curb member and using curb
as a fulcrum, lower opposite end of the unit until entire unit is
seated on the curb. When a rectangular cantilever curb is used,
care should be taken to center the unit. Check for proper alignment and orientation of supply and return openings with duct.
To assist in determining rigging requirements, unit weights are
shown as follows:
A
Y
B
CONDENSER
COIL
COMPRESSOR
CG
X
RETURN
EVAPO RATOR COIL
CORNER & CENTER OF GRAVITY LOCATIONS
SUPPLY
C
D
RIGGING REMOVAL
CAUTION
TO
PREVENT DAMAGE TO THE UNIT, DO NOT ALLOW CRANE HOOKS
AND SPREADER BARS TO REST ON THE ROOF OF THE UNIT
.
Remove sprea der bars, lifting cable s and other rigging equipment.
ELECTRICAL WIRING
WARN ING
HIGH VOLTAGE!
ISCONNECT ALL POWER BEFORE SERVICING OR
D
INSTALLING THIS UNIT
BE PRESENT
DAMAGE, PERSONAL INJURY OR DEATH
. F
. M
AILURE TO DO SO MAY CAUSE PROPERTY
ULTIPLE POWER SOURCES MAY
.
WARNING
HIGH VOLTAGE!
T
O AVOID PERSONAL INJURY OR DEATH DUE TO
ELECTRICAL SHOCK, DO NOT TAMPER WITH FACTORY
WIRING
. THE
OF THESE UNITS ARE FACTORY-INSTALLED AND HAVE
BEEN THOROUGHLY TESTED PRIOR TO SHIPMENT
C
ONTACT YOUR LOCAL REPRESENTATIVE IF
ASSISTANCE IS REQUIRED
INTERNAL POWER AND CONTROL WIRING
.
.
CAUTION
TO
PREVENT DAMAGE TO THE WIRING, PROTECT WIRING FROM
SHARP EDGES
LOCAL CODES AND ORDINANCES
REMOVABLE ACCESS PANELS
6
. F
OLLOW NATIONAL ELECTRICAL CODE AND ALL
. DO
NOT ROUTE WIRES THROUGH
.
CAUTION
C
ONDUIT AND FITTINGS MUST BE WEATHER-TIGHT TO PREVENT
WATER ENTRY INTO THE BUILDING
.
For unit protection, use a fuse or HACR circuit breaker that is in
excess of the circuit ampacity, but less than or equal to the maximum overcurrent protection device. DO NOT EXCEED THE MAXIMUM OVERCURRENT DEVICE SIZE SHOWN ON UNIT DATA PLATE.
All line voltage connections must be made through weatherproof
fittings. All exterior power supply and ground wiring must be in
approved weatherproof conduit.
The main power supply wiring to the unit and low voltage wiring
to accessory controls must be done in accordance with these instructions, the latest edition of the Na tional Electrical Code (ANSI/
NFP A 7 0), and all local codes and ordinances. All field wiring shall
conform with the temperature limitations for Type T wire (63°F/
35°C rise).
The unit is factory wired for the voltage shown on the unit’s data
plate. Refer to model nomenclature in Appendix B for voltage requirement for your unit.
NOTE: If supply voltage is 208V, lead on primary of transformer
must be moved from the 230V to the 208V tap. Refer to wiring
diagram on unit for details.
conductor in accordance with T able 250-95 of the National
Electrical Code. Do not use the ground lug for connecting
a neutral conductor.
• Remove plug in panel located at the condenser end of
unit and route conduit to control box. Remove plug in
control box and connect power wiring to the contactor
closest to the entrance. If Single Point kit is used, refer to
Installation Instructions supplied with kit.
MAIN POWER
LOW VOLTAGE
BLOCK
LOW VOLTAGE
ENTRANCE
POWER THRU
THE CURB
CONTROL BOX
Main power wiring should be sized f or the minimum wire ampacity
shown on the unit’s data plate. Size wires in accordance with the
ampacity tables in Article 310 of the National Electrical Code. If
long wires are required, it may be necessary to increase the wire
size to prevent e xce ssive volt age drop. Wires should be sized f or a
maximum of 3% voltage drop.
CAUTION
O AVOID PROPERTY DAMAGE OR PERSONAL INJURY DUE TO FIRE, USE
T
ONLY COPPER CONDUCTORS.
CAUTION
L
ABEL ALL WIRES PRIOR TO DISCONNECTION WHEN SERVICING
CONTROLS
DANGEROUS OPERATION
SERVICING
. W
IRING ERRORS CAN CAUSE IMPROPER AND
.
. V
ERIFY PROPER OPERATION AFTER
NOTE: A weather-tight disconnect switch, properly sized for the
unit total load, must be field or f actory inst alled. An e xternal field
supplied disconnect may be mounted on the exterior panel.
Ensure the data plate is not covered by the field-supplied
disconnect switch.
• Some disconnect switches are not fused. Protect the
power leads at the point of dis tribution in accordance with
the unit’s data plate.
• The unit must be electrically grounded in accordance with
local codes or , in the ab sence of local codes, with the lat est
edition of the National Electrical Code (ANSI-NFPA 70). A
ground lug is provided for this purpose. Size grounding
LOW VOLTAGE/THERMOSTAT CONNECTIONS
NOTE:
Some models may vary from illustration.
Models with electric heat are equipped
with a power block for field connections.
CONTROL BOX CONNECTIONS
GROUND
LUG
WARN ING
F
AILURE OF UNIT DUE TO OPERATION ON IMPROPER LINE VOLTAGE
OR WITH EXCESSIVE PHASE UNBALANCE CONSTITUTES PRODUCT
ABUSE AND WILL VOID YOUR WARRANTY AND MAY CAUSE SEVERE
DAMAGE TO THE UNIT ELECTRICAL COMPONENTS
.
Areas Without Convenience Outlet
It is recommended that an independent 115V power source be
brought to the vicinity of the roof top unit for portable lights and
tools used by the service mechanic.
NOTE: Refer to local codes for requirements. These outlets can
also be factory installed.
UNITS INSTALLED ON ROOF TOPS
Main power and low voltage wiring may enter the unit through
the condenser end or through the roof curb. Install conduit connectors at the desired en trance locations. External connector s must
be weatherproof. All holes in the unit base must be sealed (including those around conduit nuts) to prevent water leakage into
building. All required conduit and fittings ar e t o be field supplie d.
7
Supply voltage to roof top unit mus t not vary by more than 10% of
the value indicated on the unit’s data plate. Pha se voltage unbalance must not exceed 2%. Contact your local power company for
correction of improper voltage or phase unbalance.
HIGH VOLTAGE ENTRANCE
(REMOVE PLUG)
NOTE: Field-supplied conduit may nee d t o be ins t alled depending
on unit/curb configuration. Use #18 AWG solid conductor wire
whenever connecting thermostat wire s to terminals on sub-ba se.
DO NOT use larger than #18 AWG wire. A transition to #18 AWG
wire may be required before entering thermostat sub-base.
NOTE: Refer to unit wiring diagrams for thermostat hookups.
* (6 Ton - 34 1/4”)
RETURN
SUPPLY
1:4
POWER THRU
THE CURB
12 3/8”
30 1/4”*
LOW VOLTAGE ENTRANCE
3.5 DIA.
4 1/2”
CIRCULATING AIR AND FILTERS
DUCTWORK
The supply duct from the unit through a wall may be inst alled without clearance. However, minimum unit clearances must be maintained (see “Clearance s” section). The supply duct should be provided with an access panel large enough to inspect the air chamber downstream of the heat exchanger. A cover should be tightly
attached to prevent air leaks.
Ductwork dimensions are shown in the roof curb installation
manual.
If desired, supply and return duct connections to the unit may be
made with flexible connections to reduce possible unit operating
sound transmission.
CONDENSA TE DRAIN CONNE CTION
CONDENSATE DRAIN CONNECTION
A 3/4” female NPT drain connection is supplied on the end of the
unit and bottom of the drain pan f or condensat e piping. An ext ernal trap must be installed for proper condensate drainage.
DRAIN
CONNECTION
47 1/2”
ELECTRICAL ENTRANCE AND THRU CURB
7 1/2”
LOW VOLTAGE CONTROL WIRING
1. A 24V thermostat must be installed for unit operation. It
may be purchased with the unit or field -supplied.
Thermostats may be progr ammable or electromechanical
as required.
2. Locate thermostat or remote sensor in the conditioned
space where it will sense average temperature. Do not
locate the device where it may be directly exposed to
supply air, sunlight or other sources of heat. Follow
installation instructions packaged with the thermostat.
3. Use #18 AWG wire for 24V control wiring runs not
exceeding 75 f eet. Use #16 A WG wire f or 24V control wiring
runs not exceeding 125 feet. Use #14 AWG wire for 24V
control wiring runs not exceeding 200 feet. Low voltage
wiring may be National Electrical Code (NEC) Class 2 wher e
permitted by local codes.
4. Route thermostat wires from sub-base terminals to the
unit. Control wiring should enter through the condenser
panel opening indicated in “Electrical Entrance” figure.
Connect thermostat and any accessory wiring to low
voltage terminal block TB1 in the main control box.
UNIT 2" MINIMUM
FLEXIBLE
TUBING-HOSE
OR PIPE
A POSITIVE LIQUID
SEAL IS REQUIRED
Drain Connection
3" MIN IMUM
Install condensate drain trap as shown. Use 3/4” drain line and
fittings or larger. Do not operate without trap.
HORIZONTAL DRAIN
Drainage of condensate directly on to the r oof ma y be accept able;
refer to local code. It is recommended that a small drip pad of
either stone, mortar, wood or metal be provided to prevent any
possible damage to the roof.
CLEANING
Due to the fact that drain pans in any air conditioning unit
will have some moisture in them, algae and fungus will
grow due to airborne bacteria and spores. Periodic cleaning is necessary to prevent this build-up from plugging the
drain.
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