Daikin DCC Series User manual

©2014
5151 San Felipe St., Suite 500, Houston, TX 77056
www.daikincomfort.com
ATTENTION INSTALLING PERSONNEL:
Priorto installation,thoroughlyfamiliarizeyourselfwiththis
Installation Manual. Observe all safety warnings. During in-
stallation 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.
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.
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.................................................................... 7
Circulating Air and Filters...................................................... 9
Condensate Drain Connection .............................................. 9
Startup, Adjustments, and Checks ..................................... 10
Air flow Adjustments .......................................................... 11
Motor Sheave Adjustments ................................................ 12
Heat Pump Operation ......................................................... 14
Maintenance ...................................................................... 15
Troubleshooting.................................................................. 15
Appendix A Blower Performance Data................................ 17
Belt Drive - Standard Down Shot ................................... 17
Belt Drive - Standard Horizontal .................................... 18
Belt Drive - High Static Down Shot................................. 19
Belt Drive - High Static Horizontal.................................. 20
Appendix B Electrical Data .................................................. 21
Appendix C Unit Dimensions............................................... 22
DCC/DCHSERIES
LIGHT COMMERCIAL PACKAGED HEATINGAND COOLING UNIT
7.5 to 12.5 TON
Our continuing commitment to quality products may mean a change in specifications without notice.
INSTALLATION INSTRUCTIONS
IOD-1002D
12/2014

2
REPLACEMENTPARTS
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:
CONSUMERAFFAIRS
DAIKIN NORTH AMERICA LLC
7401SECURITYWAY
HOUSTON, TEXAS 77040
855-770-5678
SAFETYINSTRUCTIONS
TOTHE INSTALLER
Beforeinstallingthisunit,pleasereadthismanualtofamiliarize
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.
T HIS PRODUCT CONTAINS OR PRODUCES A CHEMICAL OR CHEMICALS
WHICH MAY CAUSE SERIOUS ILLNESS OR DEATH AND WHICH ARE
KNOWN TO THE S TATE OF C ALIFORNIA TO CAUSE CANCER , BIRTH
DEFECTS OR OTHER REPRODUCTIVE HARM .
WARNING
T O 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 .
WARNING
T HIS UNIT MUST NOT BE USED AS A “ CONSTRUCTION HEATER ”
DURING THE FINISHING PHASES OF CONSTRUCTION ON A NEW
STRUCTURE . T HIS TYPE OF USE MAY RESULT IN PREMATURE FAILURE
OF THE UNIT DUE TO EXTREMELY LOW RETURN AIR TEMPERATURES
AND EXPOSURE TO CORROSIVE OR VERY DIRTY ATMOSPHERES .
WARNING
HIGH VOLTAGE!
D
ISCONNECT ALL POWER BEFORE SERVICING OR
INSTALLING THIS UNIT . M ULTIPLE POWER SOURCES MAY
BE PRESENT . F AILURE TO DO SO MAY CAUSE PROPERTY
DAMAGE , PERSONAL INJURY OR DEATH .
WARNING
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.
WARNING
HIGH VOLTAGE!
INSTALLATION AND REPAIR OF THIS UNIT SHOULD BE
PERFORMED ONLY BY INDIVIDUALS MEETING ( AT A
MINIMUM ) THE REQUIREMENTS OF AN “E NTRY L EVEL
T
ECHNICIAN ” AS SPECIFIED BY THE A IR C ONDITIONING ,
HEATING AND R EFRIGERATION I NSTITUTE (AHRI).
A
TTEMPTING TO INSTALL OR REPAIR THIS UNIT WITHOUT
SUCH BACKGROUND MAY RESULT IN PRODUCT DAMAGE ,
PERSONAL INJURY OR DEATH .
GENERALINFORMATION
WARNING
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.
Thisunit isapprovedforoutdoorinstallationONLY. Ratedperfor-
manceisachievedafter72hoursofoperation.Ratedperformance
is delivered at the specified airflow. See outdoor unit specifica-
tion sheet for split system models or product specification sheet
for packaged and light commercial models. Specification sheets
can be found at www.daikincomfort.com for Daikin brand prod-
ucts. Within either website, please select the residential or com-
mercialproductsmenu andthenselectthesubmenuforthe type
ofproducttobeinstalled,suchasairconditionersorheatpumps,
to access a list of product pages that each contain links to that
model’sspecificationsheet.
To assure that your unit operates safely and efficiently, it must be
installed, operated, and maintained in accordance with these in-
stallation and operating instructions, all local building codes and
ordinances.
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 .
CAUTION

3
EPA REGULATIONS
IMPORTANT:THE UNITED STATES ENVIRONMENTAL PROTECTION AGENCY (EPA)
HAS ISSUED VARIOUS REGULATIONS REGARDING THE INTRODUCTION AND DISPOSAL
OF REFRIGERANTS IN THIS UNIT. FAILURE TO FOLLOW THESE REGULATIONS MAY
HARM THE ENVIRONMENT AND CAN LEAD TO THE IMPOSITION OF SUBSTANTIAL
FINES. BECAUSE REGULATIONS MAY VARY DUE TO PASSAGE OF NEW LAWS, WE
SUGGEST ACERTIFIED 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 manufactured to permit installation
inaccordancewith NationalCodes.It isthe installer’sresponsibil-
ity 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 calculated by an approved
method or in accordance with ASHRAE Guide or Manual J - Load
Calculations published by the Air Conditioning Contractors of
America.
Obtain from:
American National Standards Institute
1430 Broadway
New York, NY 10018
System design and installation should also, where applicable, fol-
lowinformationpresentedinacceptedindustryguidessuchasthe
ASHRAE Handbooks. The manufacturer assumes no responsibility
forequipment installedinviolationofanycode or regulation.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 re-
quired). The internal systems of the unit are completely factory-
installed and tested prior to shipment.
Units are generally installed on a steel roof mounting curb assem-
bly which has been shipped to the job site for installation on the
roof structure prior to the arrival of the unit. The model number
shownontheunit’sidentificationplateidentifiesthevariouscom-
ponents of the unit such as refrigeration tonnage, heating input
and voltage.
Carefully inspect the unit for damage. Any bolts or screws which
mayhaveloosenedintransitmustbere-tightened. Intheeventof
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. Incaseofconcealeddamage,carriershouldbenotifiedas
soon as possible-preferably within 5 days.
4. File the claim with the following supporting documents:
a. OriginalBillof Lading, certifiedcopy, 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.
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
inspectionofdamageandforathoroughinvestigationof
each claim. The distributor or manufacturer will not
accept claims from dealers for transportation damage.
NOTE:Wheninspectingtheunitfortransportationdamage,remove
all packaging materials. Recycle or dispose of the packaging
material according to local codes.
PRE-INSTALLATION CHECKS
Carefullyreadall instructions forthe installationpriortoinstalling
unit.Ensureeachstepor procedure isunderstoodand anyspecial
considerations are taken into account beforestarting installation.
Assemblealltools,hardwareandsuppliesneededtocompletethe
installation. Some items may need to be purchased locally.
UNITLOCATION
T O PREVENT POSSIBLE EQUIPMENT DAMAGE , PROPERTY DAMAGE ,
PERSONAL INJURY OR DEATH , THE FOLLOWING BULLET POINTS MUST
BE OBSERVED WHEN INSTALLING THE UNIT .
WARNING
IMPORTANT NOTE: Remove wood shipping rails and metal ship-
ping brace (if applicable) prior to installation of the unit on a roof
curb.
ALL INSTALLATIONS:
IMPORTANT NOTE: Unit should be energized 24 hours prior to
compressor start up to ensure crankcase heater has suffi-
ciently warmed the compressors. Compressor damage may
occur if this step is not followed.
NOTE: Appliance is shipped from factory for vertical duct
application.
Proper installation of the unit ensures trouble-free operation. Im-
proper installation can result in problems ranging from noisy
operation to property or equipment damages, dangerous condi-
tions that could result in injury or personal property damage and
could void the warranty. Give this booklet to the user and explain
it’sprovisions.Theuser shouldretainthese instructionsforfuture
reference.
•For proper operation and condensate drainage, the unit
must be mounted level.
•Toavoidpossibleillnessordeathofthebuildingoccupants,
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,properoperation,andserviceaccess(seeUnit
Clearances). These clearances must be permanently
maintained.

4
•When the unit is heating, the temperature of the return
air entering the unit must be between 50°F and 100°F.
GROUND LEVEL INSTALLATIONS ONLY:
•When the unit is installed on the ground adjacent to the
building,alevelconcrete(orequal)baseisrecommended.
Prepare a base that is 3” larger than the package unit
footprint and a minimum of 3” thick.
•Thebaseshould also belocated wherenorunoffof water
from higher ground can collect in the unit.
ROOF TOP INSTALLATIONS ONLY:
•Toavoidpossiblepropertydamage or personalinjury,the
roof must have sufficient structural strength to carry the
weight of the unit(s) and snow or water loads as required
bylocalcodes. Consultastructuralengineertodetermine
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.
•Asindicatedontheunit’sdataplate,aminimumclearance
of36”toanycombustiblematerialisrequiredontheaccess
side of the unit. All combustible materials must be kept
out of this area.
•Adequate clearances from the unit toany adjacent public
walkways, adjacent buildings, building openings or
openablewindowsmustbemaintainedinaccordancewith
National Codes.
UNIT PRECAUTIONS
• Do not stand or walk on the unit.
• Donotdrillholesanywhereinpanelsorinthebaseframe
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.
• Donotrollunitacrossfinishedroofwithoutpriorapproval
of owner or architect.
• Do not skid or slide on any surface as this may damage
unitbase. Theunitmustbestoredonaflat,levelsurface.
Protect the condenser coil because it is easily damaged.
ROOF CURB INSTALLATIONS ONLY:
Curbinstallationsmustcomplywithlocalcodesandshouldbedone
inaccordancewiththeestablishedguidelinesoftheNationalRoof-
ing Contractors Association.
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
shipped unassembled. Field assembly, squaring, leveling and
mounting on the roof structure are the responsibility of the in-
stalling contractor. All required hardware necessary for the as-
sembly of the sheet metal curb is included in the curb accessory.
T O PREVENT POSSIBLE EQUIPMENT DAMAGE , PROPERTY DAMAGE ,
PERSONAL INJURY OR DEATH , THE FOLLOWING BULLET POINTS MUST
BE OBSERVED WHEN INSTALLING THE UNIT .
WARNING
•Sufficient structural support must be determined 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
includeductconnectionframestobeassembledwiththe
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.
Theroofmembersmustnotpenetratesupplyandreturnductopen-
ing areas as damage to the unit might occur.
NOTE:Theunitandcurbaccessoriesaredesignedtoallowvertical
ductinstallationbeforeunitplacement. Ductinstallationafterunit
placement is not recommended.
A LL CURBS LOOK SIMILAR . T O AVOID INCORRECT CURB
POSITIONING , CHECK JOB PLANS CAREFULLY AND VERIFY MARKINGS
ON CURB ASSEMBLY . I NSTRUCTIONS MAY VARY IN CURB STYLES AND
SUPERSEDES INFORMATION SHOWN .
CAUTION
See the manual shipped with the roof curb for assembly and in-
stallation instructions.
CLEARANCES
36” MIN.
36”*
36”*
UNIT CLEARANCES
*In situations that have multiple units, a 48” minimum clearance is
required between the condenser coils.

5
Adequateclearancearoundtheunitshouldbekeptforsafety,ser-
vice,maintenance,andproperunitoperation. Atotalclearanceof
75” on the main control panel side of the unit is recommended to
facilitate possible fan shaft, coil, electric heat and gas furnace re-
moval. A clearance of 48” is recommended on all other sides of
theunittofacilitatepossiblecompressorremoval,toallowservice
accessandtoinsureproperventilationandcondenserairflow. The
unitmustnotbeinstalledbeneathanyobstruction. Theunitshould
be installed remote from all building exhausts to inhibit ingestion
of exhaust air into the unit fresh air intake.
INSULATED
PANELS
Roof Curb Installation
ROOFCURBPOST-INSTALLATIONCHECKS
Afterinstallation,checkthetopofthecurb,ductconnectionframe
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.
I F PROTRUSIONS EXIST , DO NO ATTEMPT TO SET UNIT ON CURB .
CAUTION
ROOF TOP DUCT CONNECTIONS
Install all duct connections on the unit before placing the unit on
rooftop.
HORIZONTAL DISCHARGE
RefertoIOD-7006includedintheliteraturepackforinstallinghori-
zontal duct covers.
Flexible duct connectors between the unit and ducts are recom-
mended. Insulate and weatherproof all external ductwork and
joints as required and in accordance with local codes.
RETURN
SUPPLY
13 7/8”
28 3/8” 7 3/8”
12 5/8” 5 7/8”
6 1/4”
36 3/8”
REMOVE
COVERS
HORIZONTAL DISCHARGE DUCT CONNECTIONS
RIGGINGDETAILS
WARNING
TO PREVENT PROPERTY DAMAGE, THE UNIT SHOULD REMAIN IN AN UPRIGHT
POSITION DURING ALL RIGGING AND MOVING OPERATIONS. TO FACILITATE
LIFTING AND MOVING WHEN A CRANE IS USED, PLACE THE UNITINAN
ADEQUATECABLE SLING.
D O NOT LIFT UNITS TWO AT A TIME . P ROVISIONS FOR FORKS HAVE BEEN
INCLUDED IN THE UNIT BASE FRAME . M INIMUM FORK LENGTH IS 48” TO
PREVENT DAMAGE TO THE UNIT .
CAUTION
Provisionsforforkshavebeenincludedintheunitbaseframe. No
other fork locations are approved.

6
WARNING
TO PREVENT POSSIBLE EQUIPMENT DAMAGE, PROPERTY DAMAGE, PERSONAL
INJURY OR DEATH, THE FOLLOWING BULLET POINTS MUST BE OBSERVED
WHEN INSTALLING THE UNIT.
• Unit must be lifted by the four lifting holes located at the
baseframe corners.
• Liftingcablesshouldbeattachedtotheunitwithshackles.
• 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
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
strutsmountedbeneathunitbaseframebeforesettingunit
on roof curb. These struts are intended to protect unit
baseframefromforkliftdamage. Removalisaccomplished
by extracting the sheet metal retainers and pulling the
struts through the base of the unit. Refer to rigging label
on the unit.
• Your unit may be equipped with a steel shipping brace
located underneath the unit (under compressors). If
installing on a roof curb, the brace MUSTbe removed.
Follow the following instructions for removal.
W HEN UNIT IS SUSPENDED , BOARDS AND SHIPPING BRACE WILL DROP WHEN
SCREWS ARE REMOVED . T O PREVENT PERSONAL INJURY , STAND CLEAR.
R
EMOVE FORK HOLE BRACKETS , BOARDS AND SHIPPING BRACE FROM BOTTOM
OF UNIT BEFORE PLACING UNIT ONTO CURB .
CAUTION
Before installing this unit on a roof curb:
1. Removewoodenstrutsperinstallationinstructions. These
are the struts that are located in the fork holes and are
used to protect the unit from damage while lifting with
forks.
2. Locateandremovethetwelve (12)screwsthatattachthe
shippingbracetothesiderails. Therewillbesix(6)screws
oneachsideoftheunitandtheyareinadiagonalpattern.
See following figure.
3.Liftunitperthe“RiggingDetails”section oftheinstallation
instructions,observing all warningsandcautions. Liftthe
unithighenoughoff thegroundto reachunder andgrasp
the shipping brace.
4. Rotate the brace by tapping the ends until the brace falls
free from the unit.
5. Dispose of the brace appropriately.
Important: If using bottom discharge with roof curb, ductwork
shouldbeattachedtothecurbpriortoinstallingtheunit.Ductwork
dimensions are shown in Roof Curb Installation Instructions.
Refer to the Roof Curb Installation Instructions for proper curb in-
stallation. Curbing must be installed in compliance with the Na-
tional Roofing Contractors Association Manual.
Lower unit carefully onto roof mounting curb. While rigging unit,
centerofgravitywillcausecondenserendtobelowerthansupply
air end.

7
To assist in determining rigging requirements, unit weights are
shown as follows:
CG
X
BD
Y
A
C
RETURN
SUPPLY
EVAPORATOR COIL
COMPRESSOR 1
COMPRESSOR 2
CORNER & CENTER OF GRAVITY LOCATIONS
090 102 120 150
Corner Weight -A 313 310 310 420
Corner Weight -B 248 263 263 335
Corner Weight -C 250 258 258 290
Corner Weight -D 199 219 219 230
UnitShipping Weight 1085 1125 1125 1300
UnitOperatingWeight 1010 1050 1050 1275
X (Inches) 44 45 45 41
Y (Inches) 27 28 28 27.5
DATA DCCWeights (lbs)
090 102/120 150
CornerWeight -A 285 345 435
CornerWeight -B 285 325 345
CornerWeight -C 285 320 300
CornerWeight -D 285 300 240
Unit Shipping Weight 1175 1310 1350
UnitOperatingWeight 1135 1285 1325
X (Inches) 48 48 41
Y(Inches) 30 30 27.5
DATA DCH Weights (lbs)
NOTE: These weights are without accessories installed.
T O PREVENT SEVERE DAMAGE TO THE BOTTOM OF THE UNIT , DO NOT
FORK LIFT UNIT AFTER WOOD STRUTS HAVE BEEN REMOVED .
CAUTION
Bring condenser end of unit into alignment with the curb. With
condenserendof the unitrestingon curbmemberandusingcurb
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 align-
ment and orientation of supply and return openings with duct.
RIGGING REMOVAL
T O PREVENT DAMAGE TO THE UNIT , DO NOT ALLOW CRANE HOOKS
AND SPREADER BARS TO REST ON THE ROOF OF THE UNIT .
CAUTION
Removespreaderbars,liftingcablesandotherriggingequipment.
ELECTRICALWIRING
HIGH VOLTAGE!
D
ISCONNECT ALL POWER BEFORE SERVICING OR
INSTALLING THIS UNIT . M ULTIPLE POWER SOURCES MAY
BE PRESENT . F AILURE TO DO SO MAY CAUSE PROPERTY
DAMAGE , PERSONAL INJURY OR DEATH .
WARNING
HIGH VOLTAGE!
T
O AVOID PERSONAL INJURY OR DEATH DUE TO
ELECTRICAL SHOCK , DO NOT TAMPER WITH FACTORY
WIRING . T HE INTERNAL POWER AND CONTROL WIRING
OF THESE UNITS ARE FACTORY - INSTALLED AND HAVE
BEEN THOROUGHLY TESTED PRIOR TO SHIPMENT .
C
ONTACT YOUR LOCAL REPRESENTATIVE IF
ASSISTANCE IS REQUIRED .
WARNING
T O PREVENT DAMAGE TO THE WIRING , PROTECT WIRING FROM
SHARP EDGES . F OLLOW NATIONAL ELECTRICAL CODE AND ALL
LOCAL CODES AND ORDINANCES . D O NOT ROUTE WIRES THROUGH
REMOVABLE ACCESS PANELS .
CAUTION
C ONDUIT AND FITTINGS MUST BE WEATHER - TIGHT TO PREVENT
WATER ENTRY INTO THE BUILDING .
CAUTION
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 maxi-
mum overcurrent protection device. DO NOT EXCEED THE MAXI-
MUM 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.

8
The main power supply wiring to the unit and low voltage wiring
to accessory controls must be done in accordance with these in-
structions,thelatesteditionoftheNationalElectricalCode(ANSI/
NFPA 70), and all local codes and ordinances. All field wiring shall
conform with the temperature limitations for Type T wire (63°F/
35°Crise).
The main power supply shall be three-phase, three wire. The unit
is factory wired for the voltage shown on the unit’s data plate.
NOTE:Ifsupplyvoltageis208V,allleadsonprimaryoftransformer
TRANS1 must be moved from the 230V to the 208V tap.
Mainpowerwiringshouldbesizedfortheminimumwireampacity
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
sizetopreventexcessivevoltagedrop. Wiresshouldbesizedfora
maximum of 3% voltage drop.
CAUTION
TO AVOID PROPERTY DAMAGE OR PERSONAL INJURY DUE TO FIRE, USE
ONLY COPPER CONDUCTORS.
L ABEL ALL WIRES PRIOR TO DISCONNECTION WHEN SERVICING
CONTROLS . W IRING ERRORS CAN CAUSE IMPROPER AND
DANGEROUS OPERATION . V ERIFY PROPER OPERATION AFTER
SERVICING .
CAUTION
NOTE: A weather-tight disconnect switch, properly sized for the
unittotalload,mustbe field orfactoryinstalled. Anexternalfield
supplied disconnect may be mounted on the exterior panel.
Ensurethedataplateisnotcoveredbythefield-supplieddisconnect
switch.
• Somedisconnectswitchesarenotfused. Protectthepower
leads at the point of distribution in accordance with the
unit’s data plate.
• Theunitmustbeelectricallygroundedinaccordancewith
localcodesor,intheabsenceoflocalcodes,withthelatest
edition of the National Electrical Code (ANSI-NFPA 70). A
ground lug is provided for this purpose. Size grounding
conductorinaccordancewithTable250-95oftheNational
ElectricalCode. Do not usethegroundlugforconnecting
a neutral conductor.
• ConnectpowerwiringtotheSinglePointPowerblock. This
terminal block is located within the main control box.
POWER
WIRING
THERMOSTAT
WIRING
NC
COMNO
POWER AND LOW VOLTAGE BLOCK LOCATIONS
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 .
WARNING
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
thesideorthroughtheroofcurb.Installconduitconnectorsatthe
desiredentrancelocations. Externalconnectorsmustbeweather-
proof. 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 are to be field supplied.
Supplyvoltagetorooftopunitmustnotvarybymorethan10%of
the value indicated on the unit’s data plate. Phase voltage unbal-
ance must not exceed 2%. Contact your local power company for
correction of improper voltage or phase unbalance.

9
LOW VOLTAGE ENTRANCE
DIMPLES MARK DRILL LOCATIONS
HIGH VOLTAGE ENTRANCE
10 3/16”
26 ½”
ELECTRICAL ENTRANCE LOCATIONS
Unit is equipped with Single Point Power Block and Low Voltage
Block.
LOW VOLTAGE CONTROL WIRING
1. A 24V thermostat must be installed for unit operation. It
may be purchased with the unit or field -supplied.
Thermostatsmaybeprogrammableorelectromechanical
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
exceeding75feet.Use#16AWGwirefor24Vcontrolwiring
runs not exceeding 125 feet. Use #14 AWG wire for 24V
control wiring runs not exceeding 200 feet. Low voltage
wiringmaybeNationalElectricalCode(NEC)Class2where
permitted by local codes.
4. Route thermostat wires from sub-base terminals to the
unit. Control wiring should enter through the duct panel
(dimplemarksentrancelocation).Connectthermostatand
any accessory wiring to low voltage terminal block TB1 in
the main control box.
NOTE: Field-supplied conduit may need to be installed depending
on unit/curb configuration. Use #18 AWG solid conductor wire
whenever connectingthermostatwirestoterminals onsub-base.
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.
CIRCULATING AIR AND FILTERS
DUCTWORK
Thesupplyductfromtheunitthroughawallmaybeinstalledwith-
out clearance. However, minimum unit clearances must be main-
tained(see“Clearances” section). Thesupplyductshouldbepro-
vided with an access panel large enough to inspect the air cham-
ber 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.
CONDENSATE DRAIN CONNECTION
CONDENSATE DRAIN CONNECTION
A 3/4” female NPT drain connection is supplied on the end of the
unitandbottomof thedrainpanforcondensatepiping. An exter-
nal trap must be installed for proper condensate drainage.
DRAIN
CONNECTION
UNIT 2" MINIMUM
FLEXIBLE
TUBING-HOSE
OR PIPE 3" MINIMUM
A POSITIVE LIQUID
SEAL IS REQUIRED
DrainConnection
Install condensate drain trap as shown. Use 3/4” drain line and
fittings or larger. Do not operate without trap.
HORIZONTAL DRAIN
Drainageof condensatedirectlyontotheroofmaybeacceptable;
refer to local code. It is recommended that a small drip pad of ei-
therstone,mortar,woodormetalbeprovidedtopreventanypos-
sible 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 clean-
ing is necessary to prevent this build-up from plugging the
drain.

10
STARTUP, ADJUSTMENTS, AND CHECKS
HIGH VOLTAGE!
OND THE FRAME OF THIS UNIT TO
THE BUILDING ELECTRICAL GROUND BY USE OF THE
GROUNDING TERMINAL PROVIDED OR OTHER
ACCEPTABLE MEANS . D ISCONNECT ALL POWER BEFORE
SERVICING OR INSTALLING THIS UNIT .
T
O AVOID PERSONAL INJURY OR DEATH DUE TO
ELECTRICAL SHOCK , B
WARNING
PRE-STARTUP INSTRUCTIONS - GENERAL
T O PREVENT PROPERTY DAMAGE OR PERSONAL INJURY , D O NOT
START THE UNIT UNTIL ALL NECESSARY PRE - CHECKS AND TESTS
HAVE BEEN PERFORMED .
CAUTION
Priortothe beginning ofStartup,Adjustments,andChecksproce-
dures, the following steps should be completed in the building.
Prior to the beginning of Starup, Adjustments, and checks
proceudres, the following steps should be completed in the
building.
\
MOVING MACHINERY HAZARD!
T
O PREVENT POSSIBLE PERSONAL INJURY OR DEATH , DISCONNECT
POWER TO THE UNIT AND PADLOCK IN THE “OFF” POSITION BEFORE
SERVICNG FANS .
WARNING
HEATING STARTUP
On new installations, or if a major component has been replaced,
the operation of the unit must be checked.
Check unit operation as outlined in the following instructions. If
any sparking, odors, or unusual sounds are encountered, shut off
electrical power and recheck for wiring errors, or obstructions in
or near the blower motors. Duct covers must be removed before
operating unit.
The Startup, Adjustments, and Checks procedure provides a step-
by-stepsequencewhich,iffollowed,willassuretheproperstartup
of the equipment in the minimum amount of time. Air balancing
of duct system is not considered part of this procedure. However,
itisanimportantphaseofanyairconditioningsystemstartupand
shouldbeperformeduponcompletionoftheStartup,Adjustments,
andChecksprocedure.TheStartup,Adjustments,andCheckspro-
cedureatoutsideambientsbelow55°Fshouldbelimitedtoareadi-
nesscheckoftherefrigerationsystemwiththerequiredfinalcheck
and calibration left to be completed when the outside ambient
rises above 55°F.
TEMPORARY HEATING ORCOOLING
Iftheunitistobeusedfortemporaryheatingorcooling,a“Startup,
Adjustments, and Checks” must first be performed in accordance
withthismanual.Failuretocomplywiththisrequirementwillvoid
the warranty. After the machines are used for temporary heating
or cooling, inspect the coils, fans, and motors for unacceptable
levels of construction dust and dirt and install new filters.
CONTRACTOR RESPONSIBILITY
The installing contractor must be certain that:
• All supply and return air ductwork is in place, properly
sealed, and corresponds with installation instructions.
• All thermostats are mounted and wired in accordance
with installation instructions.
• All electric power, all gas, hot water or steam line
connections,andthe condensatedraininstallation have
been made to each unit on the job. These main supply
linesmustbefunctionalandcapableofoperatingallunits
simultaneously.
• Air filters are in place.
ROOF CURB INSTALLATION CHECK
Inspect the roof curb for correct installation. The unit and curb
assembly should be level. Inspect the flashing of the roof mount-
ing curb to the roof, especially at the corners, for good workman-
ship. Also check for leaks around gaskets. Note any deficiencies in
a separate report and forward to the contractor.
OBSTRUCTIONS, FAN CLEARANCE AND WIRING
Remove any extraneous construction and shipping materials that
may be found during this procedure. Rotate all fans manually to
check for proper clearances and that they rotate freely. Check for
bolts and screws that may have jarred loose during shipment to
the job site. Retighten if necessary. Re-tighten all electrical con-
nections.
FIELD DUCT CONNECTIONS
Verify that all duct connections are tight and that there is no air
bypass between supply and return.
FILTER SECTION CHECK
Removefiltersectionaccesspanelsandcheckthatfiltersareprop-
erly installed. Note airflow arrows on filter frames.
PRE-STARTUP PRECAUTIONS
It is important to your safety that the unit has been properly
groundedduringinstallation.Check groundlugconnectioninmain
control box for tightness prior to closing circuit breaker or discon-
nect switch. Verify that supply voltage on line side of disconnect
agrees with voltage on unit identification plate and is within the
utilizationvoltagerangeasindicatedinAppendixBElectricalData.
System Voltage - That nominal voltage value assigned to a circuit
or system for the purpose of designating its voltage class.
Nameplate Voltage - That voltage assigned to a piece of equip-
ment for the purpose of designating its voltage class and for the
purposeof definingtheminimumandmaximum voltageat which
the equipment will operate.

11
UtilizationVoltage-Thevoltageofthelineterminalsoftheequip-
ment at which the equipment must give fully satisfactory perfor-
mance.Onceitisestablishedthatsupplyvoltagewillbemaintained
withintheutilizationrangeunderallsystemconditions,checkand
calculateifanunbalancedconditionexistsbetweenphases.Calcu-
late percent voltage unbalance as follows:
Three Phase Models Only
3) PERCENT VOLTAGE
UNBALANCE
2) MAXIMUM VOLTAGE DEVIATIONS
FROM AVERAGE VOLTAGE
1) AVERAGE VOLTAGE
HOW TO USE THE FORMULA:
EXAMPLE: With voltage of 220, 216, and 213
1) Average Voltage = 220+216+213=649 / 3 = 216
2) Maximum Voltage Deviations from Average Voltage = 220 - 216 = 4
3) Percent Voltage Unbalance = 100 x = = 1.8%
Percent voltage unbalance MUST NOT exceed 2%.
4
216 400
216
= 100 X
CONTROL VOLTAGE CHECK
Withdisconnectswitchintheopen“OFF”position,disconnectblue
wire from low voltage transformer TRANS1. Close the disconnect
switchtoenergizeTRANS1controltransformer. Checkprimaryand
secondary (24V) of control transformer TRANS1.
AIR FLOW ADJUSTMENTS
NOTE:For2SpeedModels,airflowadjustmentsmustbemade on
high speed, i.e., 2nd stage cooling or in heat mode.
The drive on the supply fan is typically set in the middle of the
RPM range. The drive motor sheave pitch diameter is field adjust-
able for the required airflow. Refer to the following “Drive
Adjustments”section.
Whenthefinaladjustmentsarecomplete,thecurrentdrawofthe
motor should be checked and compared to the full load current
rating of the motor. The amperage must not exceed the service
factor stamped on the motor nameplate. The total airflow must
notbelessthanthatrequiredforoperationof theelectricheaters
or the furnace.
Ifaneconomizerisinstalled,checktheunitoperatingbalancewith
theeconomizeratfulloutsideairandatminimumoutsideair. Upon
completionoftheairflowbalancing,werecommendreplacingthe
variable pitched motor sheave with a properly-sized fixed sheave.
A matching fixed sheave will provide longer belt and bearing life
and vibration free operation. Initially, it is best to have a variable
pitched motor sheave for the purpose of airflow balancing, but
oncethebalancehasbeenachieved,fixedsheavesmaintainalign-
mentandminimizevibrationmoreeffectively.Fordirectdriveunits,
move green wire for fan.
NOTE:On“non-twospeedmodels”(two-speedmodelshavea“V”
in the eleventh character of the model number), never run CFM
below 300 CFM per ton. Evaporator freezing or poor unit perfor-
mance is possible.
EVAPORATOR FAN ROTATION CHECK (THREE PHASE MODELS ONLY)
Check that fan rotates counter-clockwise when viewed from the
driveside ofunitand inaccordancewithrotationarrowshownon
blower housing. If it does not, reverse the two incoming power
cables. In this case, repeat bearing check.
Donotattemptto change loadsidewiring. Internalwiringassures
all motors and compressors will rotate in correct direction once
evaporator fan motor rotation check has been made.
ELECTRICAL INPUT CHECK
Makepreliminarycheckofevaporatorfanamperedrawandverify
that motor nameplate amps are not exceeded. A final check of
amp draw should be made upon completion of air balancing of
the duct system (see Appendix B).
SET EVAPORATOR FAN RPM
ActualRPM’smustbesetandverifiedwithatachometerorstrobe
light. Refer to Appendices A and B for basic unit fan RPM. Refer
also to “Airflow” section of this manual. With disconnect switch
open, disconnect thermostat wires from terminals Y and W. This
willpreventheatingandmechanicalcoolingfromcomingon. Place
ajumperwireacrossterminalsRandGatTB1terminalblock.Close
disconnect switch; evaporator fan motor will operate so RPM can
bechecked.
START-UP PROCEDURE AND CHECKLIST FOR 2 SPEED MODELS:
Models with a V in the 11th position of the model number.
For 2 speed models, the indoor blower will operate on low speed
when in “Fan Only” mode or while in first stage “Cooling” mode.
Unit will operate on high speed in “Heating” mode and while in
second stage “Cooling” mode.
The start-up procedure is the same as for “Air Conditioning Start-
up Procedure” with the understanding that in Step 6, the indoor
blowerwill runatlowspeed(~1175motorrpm) andinStep7,the
indoor blower will operate at high speed (~1775 motor rpm).
NOTE: While in the Cooling Mode, to prevent frost from forming
on the evaporator while the unit is operating in outdoor
temperatures of 65°F or lower, it is recommended that a low
ambientkit(LAKT-**)isused. Thisis stronglyrecommendedfor2
Speed models due to the lower airflow while in the first stage
cooling. To further protect the compressor from damage during
lowambientconditions,aFreezestatKit(FSK01)canbeaddedthat
turnsthe compressoroffwhentheevaporatortemperaturedrops
too low.
BELT DRIVE MODELS ONLY
The drive on the supply fan is typically set in the middle of the
RPM range. The drive motor sheave pitch diameter is field adjust-
ablefortherequiredairflow.Referto“MotorSheaveAdjustmens”
section.

12
Uponcompletionoftheairflowbalancing,werecommendreplac-
ing the variable pitched motor sheave with a properly-sized fixed
sheave.Amatchingfixedsheavewill providelongerbeltandbear-
ing life and vibration free operation. Initially, it is best to have a
variable pitched motor sheave for the purpose of airflow balanc-
ing, but once the balance has been achieved, fixed sheaves main-
tain alignment and minimize vibration more effectively. For direct
drive units, move fan speed wire.
BEARING CHECK
Priortoenergizinganyfans,checkandmakesurethatallsetscrews
are tight so that bearings are properly secured to shafts.
For heat pump units, the airflow must be adjusted so that the air
temperaturerisefallswithintherangesgiven statedonDataPlate
(see Appendix A - Blower Performance).
TENSION AND ALIGNMENT ADJUSTMENT
Correct belt tension is very important to the life of your belt. Too
loose a belt will shorten its life; too tight, premature motor and
bearing failure will occur. Check you belt drive for adequate “run-
in”belttensionbymeasuringtheforcerequiredtodeflectthebelt
atthe midpointofthespanlength.Belttensionforcecanbemea-
suredusingabelttensiongauge,availablethroughmostbeltdrive
manufacturers.
SPANLENGTHt
*DEFLECTION
FORCE
h
C
d
H
D
*Apply force to the center of the span.
t = Span length, inches
C = Center distance, inches
D = Larger sheave diameter, inches
d = Smaller sheave diameter, inches
h = Deflection height, inches
DRIVE BELT TENSION ADJUSTMENT
BELT DRIVE Used New
7.5 Ton 2.6 to3.6 3.75+/-0.5 4.0+/-0.5 9/32+/- 1/16
8.5 Ton 2.6 to3.6 3.75+/-0.5 4.0+/-0.5 9/32+/- 1/16
10Ton 3.0 to4.0 3.75+/-0.5 4.0+/-0.5 9/32+/- 1/16
12.5Ton 2.6 to3.6 3.75+/-0.5 4.0+/-0.5 9/32+/- 1/16
A, AX Standard
MODEL DEFLECTION
(in)
DEFLECTION
FORCE (lbs)
SHEAVE
DIAMETE
R (in)
TYPE
RECOMMENDED POUNDS OF FORCE PER BELT
When new V-belts are installed on a drive, the initial tension will
drop rapidly during the first few hours of use. Check tension fre-
quently during the first 24 hours of operation. Subsequent
retentioningshouldfallbetweentheminimumandmaximumforce.
To determine the deflection distance from a normal position, use
a straightedge or stretch a cord from sheave to sheave to use as a
reference line. On multiple belt drives, an adjacent undeflected
belt can be used as a reference.
MOTOR SHEAVEADJUSTMENTS
VL, VM& 2VP VARIABLE PITCH KEY TYPE MOTOR SHEAVES
Thedrivinganddrivenmotorsheavesshould beinalignmentwith
each other and the shafts parallel.
VL& VMSHEAVES ADJUSTMENT
1. Loosen set screw “B” using a 5/32" Allen key.
2. Makinghalforfullturnsfromclosedposition,adjustsheave
pitch diameter for desired speed. DO NOT OPEN MORE
THAN FIVE FULL TURNS.
3. Tighten set screw “B” securely over flat.
4. Carefully put on belts and adjust belt tension. DO NOT
FORCE BELTS OVER GROOVES.
5. Ensureallkeysareinplaceandthesetscrewstightbefore
starting drive. Recheck set screws and belt tension after
24 hours service.
NOTE: Future adjustments should be made by loosening the belt
tension and increasing or decreasing the pitch diameter of the
sheavebyhalforfullturnsasrequired.Readjustbelttensionbefore
starting drive.

13
C
B
VL & VM
NOTE: Donotoperatesheavewithflangeprojectingbeyondthe
hub end.
REFRIGERATION SYSTEM CHECKS
Ensurethehold-downboltsonthecompressoraresecureandhave
not vibrated loose during shipment. Check that vibration grom-
metshavebeeninstalled.Visuallycheckallpipingandclamps.The
entire refrigeration system has been factory charged and tested,
making it unnecessary to field charge. Factory charges are shown
on the unit nameplate.
AIR CONDITIONING START-UPPROCEDURE
Begin with power turned off at all disconnects.
1. Turn thermostat system switch to “Cool,” and fan switch
to “Auto” and turn temperature setting as high as it will
go.
2. Inspect all registers and set them to the normal open
position.
3. Turn on the electrical supply at the disconnect.
4. Turnthefanswitchtothe“ON”position.Theblowershould
operate after a 7-second delay.
5. Turnthefanswitchto“Auto”position.Theblowershould
stop after a 65 second delay.
6. SlowlylowerthecoolingtemperatureuntilfirststageCOOL
(LOW COOL) starts. The blower, both fans, and first stage
compressor should now be operating. Allow the unit to
run 10 minutes, make sure cool air is being supplied by
the unit.
7. Lowerthecoolingtemperaturefurtheruntil second stage
COOL(HIGHCOOL)starts.Theblower,bothfans,andboth
compressors should now be operating. Allow the unit to
run 10 minutes, make sure cool air is being supplied by
the unit.
8. Turn the temperature setting to the highest position,
stopping the unit. The indoor blower will continue to run
for 65 seconds.
9. Turnthethermostatsystemswitchto“OFF”anddisconnect
all power when servicing the unit.
HIGH VOLTAGE!
D
ISCONNECT ALL POWER BEFORE SERVICING OR
INSTALLING THIS UNIT . M ULTIPLE POWER SOURCES MAY
BE PRESENT . F AILURE TO DO SO MAY CAUSE PROPERTY
DAMAGE , PERSONAL INJURY OR DEATH .
WARNING
HEAT PUMP START-UPPROCEDURE
10. Check the cooling mode for the heat pump in the same
manner as above. The reversing valve is energized when
thethermostatis placedinthecoolingposition. Aclicking
sound should be noticeable from the reversing valve. By
lowering the temperature setting to call for cooling, the
contractor is energized. The compressor, blower and fan
shouldthenberunning. Afterthecoolingmodeischecked
out, turn the thermostat system switch to “OFF”.
11. Turn the thermostat system switch to “HEAT” and fan
switch to “AUTO”.
12. Slowly raise the heating temperature setting. When the
heating first stage makes contact, stop raising the
temperature setting.. The compressor, blower and fan
shouldnowberunningwith the reversingvalve inthede-
energized (heating) position. After giving the unit time to
settle out, make sure the unit is supplying heated air.
13. Iftheoutdoorambientis above80°F, the unit maytrip on
itshighpressurecutoutwhenonheating.Thecompressor
should stop. The heating cycle must be thoroughly
checked, so postpone the test to another day when
conditions are more suitable but-DO NOT FAIL TO TEST.
If the outdoor ambient is low and the unit operates
properlyontheheatingcycle,youmaycheckthepressure
cutoutoperationbyblockingofftheindoorreturnairuntil
the unit trips.
14. If unit operates properly in the heating cycle, raise the
temperaturesettinguntiltheheatingsecondstagemakes
contact. Supplemental resistance heat, if installed should
now come on. Make sure it operates properly.
NOTE: If outdoor thermostats are installed the outdoor
ambientmustbebelowthesetpointofthesethermostats
for the heaters to operate. It may be necessary to jumper
these thermostats to check heater operation if outdoor
ambient is mild.
15. Forthermostatswithemergencyheatswitch,returntostep
11.Theemergencyheatswitchislocatedatthebottomof
the thermostat. Move the switch to emergency heat. The
heat pump will stop, the blower will continue to run, all
heaterswillcomeon andthethermostatemergencyheat
light will come on.
16. If checking the unit in the wintertime, when the outdoor
coiliscoldenoughtoactuatethedefrostcontrol,observe
at least one defrost cycle to make sure the unit defrosts
completely.

14
FINAL SYSTEM CHECKS
1. Checktoseeifallsupplyandreturnairgrillesareadjusted
and the air distribution system is balanced for the best
compromise between heating and cooling.
2. Check for air leaks in the ductwork. See Sections on
Air Flow Adjustments.
3. Make sure the unit is free of “rattles”, and the tubing in
the unit is free from excessive vibration. Also make sure
tubesor lines arenotrubbing againsteach other or sheet
metal surfaces or edges. If so, correct the trouble.
4. Set the thermostat at the appropriate setting for cooling
and heating or automatic change over for normal use.
5. BesuretheOwnerisinstructedontheunitoperation,filter,
servicing, correct thermostat operation, etc.
REFRIGERATION PERFORMANCE CHECK
Check that compressor RLA corresponds to values shown in Ap-
pendix B. RLA draw can be much lower than values listed at low
load conditions and low ambient condensing temperatures. Val-
ues in Appendix B can slightly exceed at high load conditions and
high ambient condensing temperatures.
HEAT PUMP OPERATION
COOLING CYCLE
When the heat pump is in the cooling cycle, it operates exactly as
a Summer Air Conditioner unit. In this mode, all the charts and
dataforservicethatapplytosummerairconditioningapplytothe
heat pump. Most apply on the heating cycle except that “con-
denser” becomes “evaporator”, “evaporator” becomes “con-
denser”, “cooling” becomes “heating”.
HEATING CYCLE
The heat pump operates in the heating cycle by redirecting refrig-
erantflowthroughtherefrigerantcircuitexternaltothecompres-
sor.Thisisaccomplishedwiththroughthereversingvalve.Hotdis-
charge vapor from the compressor is directed to the indoor coil
(evaporator on the cooling cycle) where the heat is removed, and
thevaporcondensestoliquid. Itthengoesthroughtheexpansion
devicetotheoutdoorcoil (condenseronthecoolingcycle) where
the liquid is evaporated, and the vapor goes to the compressor.
When the solenoid valve coil is operated either from heating to
cooling or vice versa, the piston in the reversing valve to the low
pressure (high pressure) reverse positions in the reversing valve.
Thefollowingfiguresshowaschematicofaheatpumponthecool-
ing cycle and the heating cycle. In addition to a reversing valve, a
heat pump is equipped with an expansion device and check valve
fortheindoorcoil,andsimilarequipmentfortheoutdoorcoil.Itis
also provided with a defrost control system.
The expansion devices are flowrator distributors and perform the
same function on the heating cycle as on the cooling cycle. The
flowrator distributors also act as check valves to allow for the re-
verse of refrigerant flow.
When the heat pump is on the heating cycle, the outdoor coil is
functioning as an evaporator. The temperature of the refrigerant
intheoutdoorcoilmustbebelowthetemperatureoftheoutdoor
air in order to extract heat from the air. Thus, the greater the dif-
ferenceintheoutdoortemperatureandtheoutdoorcoiltempera-
ture,thegreaterthe heatingcapacityof theheatpump. Thisphe-
nomenonisacharacteristicofaheatpump. Itisagoodpracticeto
provide supplementary heat for all heat pump installations in ar-
eas where the temperature drops below 45° F. It is also a good
practice to provide sufficient supplementary heat to handle the
entire heating requirement should there be a component failure
of the heat pump, such as a compressor, or refrigerant leak, etc.
Sincethetemperatureoftherefrigerantintheoutdoorcoilonthe
heating cycle is generally below freezing point, frost forms on the
surfaces of the outdoor coil under certain weather conditions of
temperature and relative humidity. Therefore, it is necessary to
reverse the flow of the refrigerant to provide hot gas in the out-
door coil to melt the frost accumulation. This is accomplished by
reversing the heat pump to the cooling cycle. At the same time,
the outdoor fan stops to hasten the temperature rise of the out-
door coil and lessen the time required for defrosting. The indoor
blowercontinuestorun and the supplementaryheaters are ener-
gized.

15
DEFROST CONTROL
NOTE:DCH models have one stage of mechanical heating. The de-
frostaccumulationperiodwillstartwheneitherfirstorsecondstage
defrost thermostat closes. Defrost termination occurs when both
thermostats open or the 10 minute cycle has completed.
During operation the power to the circuit board is controlled by a
temperature sensor, which is clamped to a feeder tube entering
the outdoor coil. Defrost timing periods of 30,60 and 90 minutes
may be selected by connecting the circuit board jumper to 30, 60
and 90 respectively. Accumulation of time for the timing period
selected starts when the sensor closes (approximately 31° F), and
when the wall thermostat calls for heat. At the end of the timing
period, the unit’s defrost cycle will be initiated provided the sen-
sorremainsclosed.Whenthesensoropens(approximately75°F),
thedefrostcycleisterminatedandthetimingperiodisreset.Ifthe
defrost cycle is not terminated due to the sensor temperature, a
ten minute override interrupts the unit’s defrost period.
MAINTENANCE
HIGH VOLTAGE!
D
ISCONNECT ALL POWER BEFORE SERVICING OR
INSTALLING THIS UNIT . M ULTIPLE POWER SOURCES MAY
BE PRESENT . F AILURE TO DO SO MAY CAUSE PROPERTY
DAMAGE , PERSONAL INJURY OR DEATH .
WARNING
T O PREVENT PERSONAL INJURY OR DEATH DUE TO IMPROPER
INSTALLATION , ADJUSTMENT , ALTERATION , SERVICE OR
MAINTENANCE , REFER TO THIS MANUAL . F OR ADDITIONAL
ASSISTANCE OR INFORMATION , CONSULT A QUALIFIED INSTALLER ,
SERVICE AGENCY OR THE GAS SUPPLIER .
WARNING
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 .
CAUTION
TheSelfContainedPackagedAirConditionerandHeatPumpshould
operateformanyyearswithoutexcessiveservicecallsiftheunitis
installedproperly.Howeveritisrecommendedthatthehomeowner
inspect the unit before a seasonal start up. The coils should be
freeofdebrissoadequateairflowisachieved.Thereturnandsup-
ply registers should be free of any obstructions. The filters should
becleanedorreplaced.Thesefewstepswillhelptokeeptheprod-
uctuptimetoamaximum. TheServicesectionthatfollowsshould
helpinidentifying problemsiftheunitdoesnotoperateproperly.
FILTERS
CAUTION
TO PREVENT PROPERTY DAMAGE DUE TO FIRE AND LOSS OF
EQUIPMENT EFFICIENCY OR EQUIPMENT DAMAGE DUETO DUST ANDLINT
BUILD UP ON INTERNAL PARTS, NEVER OPERATE UNIT WITHOUT AN AIR
FILTER INSTALLED IN THE RETURN AIR SYSTEM.
Everyapplicationmayrequireadifferentfrequencyofreplacement
of dirty filters. Filters must be replaced at least every three (3)
months during operating seasons.
Dirty filters are the most common cause of inadequate heating or
cooling performance. Filter inspection should be made at least
everytwomonths;moreoftenifnecessarybecauseoflocalcondi-
tions and usage.
Dirty throwaway filters should be discarded and replaced with a
new, clean filter.
Disposable return air filters are supplied with this unit. See the
unit Specification Sheet or Technical Manual for the correct size
and part number. To remove the filters, remove the filter access
panel on return side of the unit.
CABINET FINISH MAINTENANCE
Use a fine gradeautomotivewaxon the cabinetfinishto maintain
the finish’s original high luster. This is especially important in in-
stallations with extended periods of direct sunlight.
CLEAN OUTSIDE COIL (QUALIFIED SERVICER ONLY)
The coil with the outside air flowing over it should be inspected
annuallyandcleanedasfrequentlyasnecessarytokeepthefinned
areas free of lint, hair and debris.
LUBRICATION
The fan shaft bearings , the 1 to 2 HP supply fan motors, the con-
denser fan motors and compressors are permanently lubricated.
FUNCTIONAL PARTS
Refer to the unit Parts Catalog for a list of functional parts. Parts
are available from your distributor.
TROUBLESHOOTING
THEFOLLOWINGINFORMATIONISFORUSEBYQUALIFIEDSERVICE
AGENCY ONLY: OTHERS SHOULD NOT ATTEMPT TO SERVICE THIS
EQUIPMENT.
Common Causes of Unsatisfactory Operation of Heat Pump on the
Heating Cycle.
INADEQUATE AIR VOLUME THROUGH INDOOR COIL
When a heat pump is in the heating cycle, the indoor coil is func-
tioning as a condenser. The return air filter must always be clean,
andsufficientairvolumemustpassthroughtheindoorcoiltopre-
vent excessive discharge pressure, and high pressure cut out.

16
OUTSIDE AIR INTO RETURN DUCT
Do not introduce cold outside air into the return duct of a heat
pumpinstallation. Forunitswith2-speedmotors,donotallow air
entering the indoor coil to drop below 65° F. Air below this tem-
perature willcauselowdischargepressure, thuslowsuctionpres-
sure,andexcessivedefrostcyclingresultinginlowheatingoutput.
It may also cause false defrosting.
UNDERCHARGE
An undercharged heat pump on the heating cycle will cause low
discharge pressure resulting in low suction pressure and frost ac-
cumulation on the outdoor coil.
POOR “TERMINATING” SENSOR CONTACT
Theunit’sdefrostterminatingsensormustmakegoodthermalcon-
tactwiththeoutdoorcoiltubing. Poorcontactmaynotterminate
the unit’s defrost cycle quickly enough to prevent the unit from
cutting out on high discharge pressure.
MALFUNCTIONING REVERSING VALVE - THIS MAY BE DUE TO:
1. Solenoid not energized - In order to determine if the
solenoidisenergized,touchthenutthatholdsthesolenoid
cover in place with a screwdriver. If the nut magnetically
holds the screwdriver, the solenoid is energized and the
unit is in the cooling cycle.
2. No voltage at unit’s solenoid - Check unit voltage. If no
voltage, check wiring circuit.
3. Valve will not shift:
a. Undercharged - check for leaks;
b. Valve Body Damaged - Replace valve;
c. Unit Properly Charged -Ifitisontheheatingcycle, raise
thedischargepressurebyrestricting airflow throughthe
indoor coil. If the valve does not shift, tap it lightly on
both ends with a screwdriver handle. DO NOT TAP THE
VALVE BODY. If the unit is on the cooling cycle, raise the
discharge pressure by restricting airflow through the
outdoor coil. If the valve does not shift after the above
attempts, cut the unit off and wait until the discharge
andsuctionpressureequalize,andrepeatabovesteps.If
the valve does not shift, replace it.

17
DCC/DCH150 STANDARDBELTDRIVEDOWN SHOTINCLUDES2 SPEEDMODELSATHIGHSPEED
ESP
(INW.C.) CFM BHP CFM BHP CFM BHP CFM BHP CFM BHP CFM BHP
0.2 5378 2.35 4967 1.92 4710 1.59 4512 1.33
0.4 5514 2.92 5349 2.56 4750 1.97 4583 1.71 4319 1.40 4030 1.13
0.6 5204 2.69 4919 2.27 4488 1.81 4258 1.54
0.8 4830 2.42 4649 2.09 4019 1.55
1.0 4497 2.19 4264 1.86
5TURNS1TURN 2TURNS0 TURNS 3 TURNS 4 TURNS
APPENDIX A BLOWER PERFORMANCE DATA
BELT DRIVE - STANDARD DOWN SHOT
NOTE: Unit factory shipped at 2.5 turns open. Tables represent dry coil without filter.
To compensate for filter, add 0.08" to measured E.S.P. SCFM correction for wet coil = 4%.
DCC/DCH090 STANDARD BELT DRIVE DOWN SHOT
CFMRPMBHPCFMRPMBHPCFMRPMBHPCFMRPMBHPCFMRPMBHPCFMRPMBHP
0.1 3617 704 1.07 3293 653 0.84
0.3 3541 749 1.15 3179 704 0.88 2757 656 0.66
0.5 3447 798 1.23 3049 754 0.94 2606 710 0.71
0.7 3400 848 1.33 2950 798 1.01 2474 754 0.75
0.9 3303 890 1.41 2871 848 1.11 2408 804 0.82
1.1 2838 897 1.23
DCC/DCH102 STANDARD BELT DRIVE DOWN SHOT
CFMRPMBHPCFMRPMBHPCFMRPMBHPCFMRPMBHPCFMRPMBHPCFMRPMBHP
0.1 3372 747 1.11 3078 703 0.91 2814 658 0.70
0.3 3187 797 1.16 2952 753 0.97 2650 703 0.73
0.5 3237 841 1.29 2684 803 0.96 2453 754 0.77
0.7 3303 890 1.47 2753 847 1.09
0.9 2807 896 1.26
DCC/DCH120 STANDARD BELT DRIVE DOWN SHOT INCLUDES 2 SPEED MODELS AT HIGH SPEED
CFMRPMBHPCFMRPMBHPCFMRPMBHPCFMRPMBHPCFMRPMBHPCFMRPMBHP
0.2 4632 781 1.76 4203 742 1.41 3927 691 1.17 3510 658 0.9
0.4 4488 825 1.85 4183 783 1.54 3733 748 1.23 3512 693 1
0.6 4442 880 2.02 4066 830 1.63 3717 786 1.31
0.8 4001 885 1.77 3622 835 1.41
1.0 3603 890 1.55
1.2
ESP, In
H
2
O
TURNS OPEN
012345
ESP, In
H
2
O
TURNS OPEN
012345
ESP, In
H
2
O
TURNS OPEN
012345
INCLUDES 2 SPEED MODELS AT HIGH SPEED
INCLUDES 2 SPEED MODELS AT HIGH SPEED

18
APPENDIX A BLOWER PERFORMANCE DATA
BELT DRIVE - STANDARD HORIZONTAL
NOTE: For 2 Speed Models, blower performance data reflects High speed performance.
NOTE: Unit factory shipped at 2.5 turns open. Tables represent dry coil without filter.
To compensate for filter, add 0.08" to measured E.S.P. SCFM correction for wet coil = 4%.
DCC/DCH120 STANDARD BELT DRIVE HORIZONTAL INCLUDES 2 SPEED MODELS AT HIGH SPEED
CFM RPM BHP CFM RPM BHP CFM RPM BHP CFM RPM BHP CFM RPM BHP CFM RPM BHP
0.2 4562 736 1.58 4253 691 1.29 3893 642 1
0.4 4497 780 1.7 4200 736 1.41 3735 691 1.06 3322 648 0.83
0.6 4467 824 1.81 4221 784 1.55 3689 741 1.18
0.8 4564 873 2.06 4170 830 1.68 3677 785 1.29
1.0 4129 875 1.81 3498 835 1.34
1.2 3558 879 1.49
ESP, In
H
2
O
TURNS OPEN
012345
DCC/DCH090 STANDARD BELT DRIVE HORIZONTAL
CFM RPM BHP CFM RPM BHP CFM RPM BHP CFM RPM BHP CFM RPM BHP CFM RPM BHP
0.1 3625 701 1.08 3309 660 0.86
0.3 3815 797 1.44 3468 747 1.11 3177 703 0.88 2796 663 0.68
0.5 3780 841 1.52 3405 803 1.23 3053 753 0.94 2608 709 0.68 2225 665 0.53
0.7 3687 885 1.6 3327 847 1.29 2968 805 1.02 2423 758 0.73
0.9 3236 891 1.39 2850 852 1.1 2352 807 0.8
1.1 2713 896 1.17
DCC/DCH102 STANDARD BELT DRIVE HORIZONTAL
CFM RPM BHP CFM RPM BHP CFM RPM BHP CFM RPM BHP CFM RPM BHP CFM RPM BHP
0.1 3475 698 1.05 3159 657 0.83
0.3 3665 794 1.41 3318 744 1.08 3027 700 0.85 2646 660 0.65
0.5 3630 838 1.49 3255 800 1.2 2903 750 0.91 2458 706 0.65
0.7 3537 882 1.57 3177 844 1.26 2818 802 0.99
0.9 3086 888 1.36 2700 849 1.07
1.1 2563 893 1.14
ESP, In
H
2
O
TURNS OPEN
012345
TURNS OPEN
ESP, In
H
2
O450123
DCC/DCH150 STANDARD BELT DRIVE HORIZONTAL INCLUDES 2 SPEED MODELS AT HIGH SPEED
ESP
(INW.C.) CFM BHP CFM BHP CFM BHP CFM BHP CFM BHP CFM BHP
0.2 5570 2.27 4935 1.70 4584 1.36
0.4 58713.2056392.7753072.3149021.8846371.5541781.19
0.6 56103.0053582.5750512.1546031.7243411.41
0.8 5391 2.83 5010 2.33 4799 2.00 4393 1.61
1.0 5078 2.59 4676 2.11 4448 1.79
1.2 4521 2.20 4226 1.83
0 TURNS 1 TURN 2 TURNS 3 TURNS 4 TURNS 5 TURNS
INCLUDES 2 SPEED MODELS AT HIGH SPEED
INCLUDES 2 SPEED MODELS AT HIGH SPEED

19
APPENDIX A BLOWER PERFORMANCE DATA
BELT DRIVE - HIGH STATIC DOWN SHOT
DCC/H090 DOWN SHOT HIGH STATIC BELT DRIVE
CFM RPM BHP CFM RPM BHP CFM RPM BHP CFM RPM BHP CFM RPM BHP CFM RPM BHP
0.9 3401 909 1.51
1.1 3428 965 1.71 2943 915 1.3
1.3 3471 1015 1.9 3012 971 1.5 2423 920 1.12
1.5 3722 1063 2.25 3041 1023 1.67 2503 976 1.31
1.7 3359 1075 2.04 2540 1031 1.5
1.9 3381 1119 2.22 2890 1080 1.78
2.1 3089 1129 2.04
DCC/H102 DOWN SHOT HIGH STATIC BELT DRIVE
CFM RPM BHP CFM RPM BHP CFM RPM BHP CFM RPM BHP CFM RPM BHP CFM RPM BHP
0.9 3251 906 1.48
1.1 3278 962 1.68 2793 912 1.27
1.3 3321 1012 1.87 2862 968 1.47
1.5 3572 1060 2.22 2891 1020 1.64
1.7 3209 1072 2.01
1.9 3231 1116 2.19 2740 1077 1.75
2.1 3256 1156 2.31 2939 1126 2.01
DCC/H120 DOWN SHOT HIGH STATIC BELT DRIVE INCLUDES 2 SPEED MODELS AT HIGH SPEED
CFM RPM BHP CFM RPM BHP CFM RPM BHP CFM RPM BHP CFM RPM BHP CFM RPM BHP
0.8 4435 940 2.22 4078 886 1.82
1.0 4462 997 2.47 4103 945 2.05 3539 892 1.52
1.2 4513 1054 2.75 4127 1003 2.26 3568 950 1.71
1.4 4126 1064 2.52 3597 1008 1.92
1.6 4438 1116 2.97 3759 1069 2.25
1.8 3956 1124 2.55
2.0 4050 1179 3.05 3473 1132 2.32
ESP, In
H2O
TURNS OPEN
012345
ESP, In
H2O4523
TURNS OPEN
ESP, In
H2O
TURNS OPEN
012345
DO NOT
OPERATE
01
DCC/H150 DOWN SHOT HIGH STATIC BELT DRIVE INCLUDES 2 SPEED MODELS AT HIGH SPEED
CFM BHP CFM BHP CFM BHP CFM BHP CFM BHP CFM BHP
0.8 5978 3.87 5691 3.38 5324 2.81
1.0 5947 4.16 5656 3.58 5376 3.12 4933 2.52
1.2 5708 3.93 5459 3.40 4950 2.79 4441 2.18
1.4 5776 4.64 5510 4.07 5245 3.48 4844 2.88 4525 2.45
1.6 5465 4.30 5199 3.74 4894 3.17 4404 2.54
1.8 5145 3.97 4871 3.41 4495 2.83
2.0 4805 3.63 4565 3.13 4142 2.55
2.2 4429 3.27 4233 2.85
ESP, In
H2O
TURNS OPEN
012345
NOTE: Unit factory shipped at 2.5 turns open. Tables represent dry coil without filter.
To compensate for filter, add 0.08" to measured E.S.P. SCFM correction for wet coil = 4%.

20
APPENDIX A BLOWER PERFORMANCE DATA
BELT DRIVE - HIGH STATIC HORIZONTAL
NOTE: Unit factory shipped at 2.5 turns open. Tables represent dry coil without filter.
To compensate for filter, add 0.08" to measured E.S.P. SCFM correction for wet coil = 4%.
DCC/H090 HORIZONTAL HIGH STATIC BELT DRIVE
CFM RPM BHP CFM RPM BHP CFM RPM BHP CFM RPM BHP CFM RPM BHP CFM RPM BHP
0.9 3447 902 1.54
1.1 3398 956 1.65 3006 908 1.31
1.3 3486 1008 1.87 2960 962 1.44
1.5 3514 1057 2.07 2949 1019 1.62
1.7 3388 1103 2.18 3036 1069 1.84
1.9 2959 1114 2
2.1 2527 1124 1.86
DCC/H102 HORIZONTAL HIGH STATIC BELT DRIVE
CFM RPM BHP CFM RPM BHP CFM RPM BHP CFM RPM BHP CFM RPM BHP CFM RPM BHP
0.9 3297 899 1.51
1.1 2856 905 1.28
1.3 3336 1005 1.84 2810 959 1.41
1.5 3364 1054 2.04 2799 1016 1.59
1.7 3238 1100 2.15 2886 1066 1.81
1.9 3188 1146 2.23 2809 1111 1.97
DCC/H120 HORIZONTAL HIGH STATIC BELT DRIVE INCLUDES 2 SPEED MODELS AT HIGH SPEED
CFM RPM BHP CFM RPM BHP CFM RPM BHP CFM RPM BHP CFM RPM BHP CFM RPM BHP
0.8 4602 884 2.13
14749 940 2.44 4180 885 1.89
1.2 4251 945 2.12 3642 896 1.58
1.4 4443 1001 2.5 3744 951 1.8
1.6 4587 1056 2.82 3971 1006 2.17
1.8 4760 1105 3.23 4071 1061 2.43 3342 1012 1.86
24364 1114 2.91 3579 1067 2.05
ESP, In
H2O
TURNS OPEN
012345
DO NOT
OPERATE
DO NOT
OPERATE
ESP, In
H2O
TURNS OPEN
012345
ESP, In
H2O
TURNS OPEN
012345
DCC/H150 HORIZONTAL HIGH STATIC BELT DRIVE
CFM BHP CFM BHP CFM BHP CFM BHP CFM BHP CFM BHP
0.8 --- --- --- --- --- --- --- --- 5858 3.51 5538 2.97
1.0 --- --- --- --- --- --- 5894 3.85 5502 3.20 5282 2.78
1.2 --- --- --- --- 5780 4.04 5570 3.55 5110 2.88 4869 2.47
1.4 --- --- 5900 4.49 5501 3.77 5312 3.33 4793 2.64 4598 2.28
1.6 5860 4.76 5514 4.08 5257 3.54 4945 3.01 4382 2.34 --- ---
1.8 5615 4.49 5315 3.88 5020 3.32 4504 2.66 --- --- --- ---
2.0 5529 4.40 4906 3.49 4601 2.96 --- --- --- --- --- ---
2.2 4938 3.78 4541 3.15 4222 2.65 --- --- --- --- --- ---
ESP, In
H2O
TURNS OPEN
012345