Daikin DCC Series User manual

ATTENTION INSTALLING PERSONNEL:
Prior to installation, thoroughly familiarize yourself with
this Installation Manual. Observe all safety warnings. Dur-
ing 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.
IOD-1001
6/13
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.................................................................... 6
Circulating Air and Filters...................................................... 8
Condensate Drain Connection .............................................. 8
Startup, Adjustments, and Checks ........................................ 9
Air Flow Adjustments ......................................................... 10
Motor Sheave Adjustments ................................................ 11
Heat Pump Operation......................................................... 12
Maintenance ...................................................................... 13
Troubleshooting.................................................................. 14
Appendix A Blower Performance Tables ............................. 16
Direct Drive .................................................................... 16
Standard Down Shot and Horizontal .......................... 16
Standard Down Shot and Horizontal .......................... 17
Standard DCC/DCH060 Down Shot............................. 18
Standard DCC/DCH060 Horizontal .............................. 19
Belt Drive ....................................................................... 20
Standard Down Shot .................................................. 20
Standard Horizontal ................................................... 21
Appendix B Electrical Data .................................................. 22
Appendix C Unit Dimensions .............................................. 24
INSTALLATION INSTRUCTIONS
Our continuing commitment to quality products may mean a change in specifications without notice.
©2013
5151 San Felipe St., Suite 500, Houston, TX 77056
www.daikincomfort.com
DCC/DCHSERIES
LIGHTCOMMERCIALPACKAGEDHEATINGANDCOOLINGUNIT
3 TO 6TON

2
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
T O 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 .
WARNING
ThisunitisapprovedforoutdoorinstallationONLY. Ratedperfor-
manceisachievedafter72hoursofoperation.Ratedperformance
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.
Withinthewebsite,pleaseselect thecommercialproductsmenu
and then select the submenu for the type of product to be in-
stalled, such as air conditioners or heat pumps, to access a list of
product pages that each contain links to that model’s specifica-
tion sheet.
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.
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:
CONSUMER AFFAIRS
DAIKIN NORTH AMERICA LLC
7401 SECURITY WAY
HOUSTON, TEXAS 77040
855-770-5678
SAFETYINSTRUCTIONS
TOTHE 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.
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
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

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 A
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 manufactured to permit installation
inaccordancewith NationalCodes. Itis the 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
forequipmentinstalledin violation ofanycodeor 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.
Unitsaregenerallyinstalledona steelroofmountingcurbassem-
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 including damage to the
cabinetry. Anyboltsorscrewswhichmayhaveloosenedintransit
mustbere-tightened. Intheeventofdamage,thereceivershould:
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. OriginalBill ofLading, certifiedcopy, or indemnitybond.
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
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,
removeallpackagingmaterials.Recycleordispose ofthepackaging
material according to local codes.
PRE-INSTALLATION CHECKS
Carefullyreadallinstructionsfortheinstallationpriortoinstalling
unit.Ensureeachstepor procedureis understoodandanyspecial
considerations are taken into account before starting 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 prior to installa-
tion of the unit.
ALL INSTALLATIONS:
IMPORTANT NOTE:Unit should be energized 24 hours prior to
compressor start up to ensure crankcase heater has suffi-
cientlywarmedthecompressors. Compressordamage may
occur is 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.Theusershouldretaintheseinstructions forfuture
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
willbefrequentlycontaminatedbycompoundscontaining
chlorineorfluorine.Commonsourcesofsuchcompounds
include swimming pool chemicals and chlorine bleaches,
paintstripper,adhesives,paints,varnishes,sealers,waxes
(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.

4
•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.
•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,alevelconcrete(orequal)baseisrecommended.
Prepare a base that is 3” larger than the package unit
footprint and a minimum of 3” thick.
•Thebaseshould also belocatedwherenorunoffof water
from higher ground can collect in the unit.
ROOF TOP INSTALLATIONS ONLY:
•Toavoidpossible property damage orpersonalinjury, 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.
•Adequate clearances from the unit to any 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
includeduct connection framestobeassembledwith 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: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
24”*
Min.
24”*
Min.
36”
Min.
UNIT CLEARANCES
*Insituationsthathavemultipleunits,a48”minimumclearanceis
required between the condenser coils.

5
Adequateclearancearoundtheunitshouldbekeptforsafety,ser-
vice, maintenance, and proper unit operation. A total clearance
of 75” on the main control panel side of the unit is recommended
to facilitate possible fan 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 in-
sure proper ventilation and condenser airflow. The unit must not
beinstalledbeneathanyobstruction. Theunitshould beinstalled
remote from all building exhausts to inhibit ingestion of exhaust
air into the unit fresh air intake.
INSULATED
PANELS
ROOF CURB INSTALLATION
ROOFCURB POST-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
ROOFTOP 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
12”
17” 7 3/8”
11” 4 7/8””
25”
6 3/16”
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 UNIT INAN
ADEQUATECABLE SLING.
I F UNITS ARE LIFTED TWO AT A TIME , THE FORK HOLES ON THE
CONDENSER END OF THE UNIT MUST NOT BE USED . M INIMUM FORK
LENGTH IS 42” TO PREVENT DAMAGE TO THE UNIT ; HOWEVER , 48”
IS RECOMMENDED .
CAUTION
Provisionsforforkshavebeenincludedintheunitbaseframe. No
other fork locations are approved.
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
base frame corners.
• Liftingcablesshouldbeattachedtotheunitwithshackles.
• The distance between the crane hook and the top of the
unit must not be less than 60”.

6
• Two spreader bars must span over the unit to prevent
damage to the cabinet by the lift cables. Spreader bars
mustbe ofsufficientlength so thatcables donot 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
accomplishedbyextractingthesheet metal retainersand
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
shouldbeattachedtothecurbpriortoinstallingtheunit.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 Na-
tional Roofing Contractors Association Manual.
Lower unit carefully onto roof mounting curb. While rigging unit,
centerofgravitywillcausecondenserendtobelowerthansupply
air end.
To assist in determining rigging requirements, unit weights are
shown as follows:
A
B
C
D
CG
SUPPLY
RETURN
EVAPORATOR COIL
CONDENSER
COIL
COMPRESSOR
Y
X
CORNER & CENTER OF GRAVITY LOCATIONS
ABCD
DCC036* 35 27 525 500 115 150 105 130
DCC048* 35 27 560 535 125 160 110 140
DCC060* 35 27 595 570 133 167 118 152
DCC072* 35 27 650 625 147 185 127 166
DCH036* 34 28 605 580 130 180 110 155
DCH048* 34 28 610 585 135 185 115 155
DCH060* 34 28 605 580 133 182 113 157
DCH072* 34 28 660 635 142 200 122 171
* Weights shown are belt drive with no accessories.
Operating
Weight
(lbs)
Corner Weights ( lbs )
A*
Model X (in) Y (in)
Shipping
Weight
(lbs)
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
condenserendofthe unit restingon curb memberand usingcurb
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

7
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.
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°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 re-
quirement 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.
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.
Ensure the data plate is not covered by the field-supplied
disconnect switch.
• Some disconnect switches are not fused. Protect the
powerleadsatthepointofdistributioninaccordancewith
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. Donotuse thegroundlug forconnecting
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.
LOW VOLTAGE
BLOCK
MAIN POWER
LOW VOLTAGE
ENTRANCE POWER THRU
THE CURB
CONTROL BOX
LOW VOLTAGE/THERMOSTAT CONNECTIONS
NOTE: Some modelsmay varyfrom illustration.
Models with electric heat are equipped
with a power block for field connections.
GROUND
LUG
CONTROL BOX CONNECTIONS
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.

8
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 con-
nectorsatthedesiredentrancelocations. Externalconnectorsmust
be weatherproof. All holes in the unit base must be sealed (in-
cluding those around conduit nuts) to prevent water leakage into
building. Allrequiredconduitandfittings aretobe fieldsupplied.
Supplyvoltagetorooftopunit mustnotvarybymorethan10%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.
HIGH VOLTAGE ENTRANCE
LOW VOLTAGE ENTRANCE
1:4
30 1/4”*
12 3/8”
(REMOVE PLUG)
* (6 Ton - 34 1/4”)
41/2”
47 1/2” 7 1/2”
POWER THRU
THE CURB
3.5 DIA.
RETURN
SUPPLY
ELECTRICAL ENTRANCE AND THRU CURB
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 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.
NOTE: Field-supplied conduit may needtobe installed depending
on unit/curb configuration. Use #18 AWG solid conductor wire
whenever connectingthermostatwirestoterminalson sub-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). Thesupply duct shouldbepro-
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.
CONDENSATEDRAINCONNECTION
CONDENSATE DRAIN CONNECTION
A 3/4” female NPT drain connection is supplied on the end of the
unitandbottomofthedrainpanforcondensatepiping. Anexter-
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
Drain Connection
Install condensate drain trap as shown. Use 3/4” drain line and
fittings or larger. Do not operate without trap.
HORIZONTAL DRAIN
Drainageof condensate directly ontothe roof may be acceptable;
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.

9
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.
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
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
Priortothebeginningof Startup,Adjustments,andChecksproce-
dures, 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, and the condensate drain installation have
been made to each unit on the job. These main supply
linesmustbefunctionalandcapableofoperatingallunits
simultaneously.
• All 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 definingtheminimum andmaximum voltageat which
the equipment will operate.

10
UtilizationVoltage-Thevoltageofthelineterminalsoftheequip-
ment at which the equipment must give fully satisfactory perfor-
mance. Once it is established that supply voltage will be main-
tained within the utilization range under all system conditions,
check and calculate if an unbalanced condition exists between
phases. Calculate 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
AIRFLOWADJUSTMENTS
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“DriveAdjustments”section
below.
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
notbelessthan thatrequiredforoperationof the electricheaters
or the furnace.
Ifaneconomizerisinstalled,checktheunitoperatingbalancewith
theeconomizeratfulloutsideairandatminimumoutsideair. Upon
completion of the air flow balancing, we recommend replacing
the variable pitched motor sheave with a properly-sized fixed
sheave.Amatchingfixedsheavewillprovidelongerbeltandbear-
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 green wire for fan.
NOTE:NeverrunCFMbelow350CFMperton,evaporatorfreezing
or poor unit performance is possible.
PSC MOTOR
Adjust the CFM for the unit by changing the speed tap of the in-
door blower motor at the EBTDR “com” connection with the one
of the speed taps on “M1” or “M2” (Black-High Speed, Blue-Me-
dium Speed, Red-Low Speed).
EEM MOTOR
Adjust the CFM for the unit by changing the position of the low
voltage leads on the motor terminal block. Green is for Fan Only.
Yellow is for Cooling and Heat Pump Heating. Refer to Appendix A
for blower performance at each speed tap. NOTE: If more than
one lead is energized simultaneously, the motor will run at the
higher speed.
EVAPORATOR FAN ROTATION CHECK (THREE PHASE MODELS ONLY)
Check that fan rotates counter-clockwise when viewed from the
driveside ofunitand in accordancewithrotationarrowshownon
blower housing. If it does not, reverse the two incoming power
cables. In this case, repeat bearing check.
Donotattempttochangeloadsidewiring.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).
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.
Upon completion of the air flow balancing, we recommend re-
placing the variable pitched motor sheave with a properly-sized
fixedsheave.A matching fixedsheavewill providelonger beltand
bearinglifeand vibrationfreeoperation. Initially,itisbest tohave
avariablepitchedmotorsheaveforthepurposeofairflowbalanc-
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
temperaturerisefallswithin the rangesgivenstatedon DataPlate
(see Appendix A - Blower Performance).
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
be checked.
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” belt tension by measuring the force required to deflect the
belt at the midpoint of the span length. Belt tension force can be
measured using a belt tension gauge, available through most belt
drive manufacturers.

11
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
A, AX Standard 3.0 to 4.0 4.2 ± .5 5.5 ± .5 0.313
DEFLECTION
(in)
DEFLECTION
FORCE (lbs)
SHEAVE
DIAMETER
(in)
TYPE
RECOMMENDED POUNDS OF FORCE PER BELT
New V-belts will drop rapidly during the first few hours of use.
Check tension frequently during the first 24 hours of operation.
Tensionshouldfallbetweentheminimumandmaximumforce.To
determine the deflection distance from a normal position, mea-
sure the distance from sheave to sheave using a straightedge or a
cord. This is your reference line. On multiple belt drives, an adja-
cent 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. Making half or full turns from closed position, adjust
sheave 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.
C
B
VL & VM
SHEAVE DIAGRAM
NOTE: Do not operate sheave with flange projecting beyond the
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.
START-UPPROCEDURE AND CHECKLIST
Begin with power turned off at all disconnects.
AIR CONDITIONING START-UPPROCEDURE
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. Turn the fan switch to the “ON” position. The blower
should operate after a 7 second delay.
5. Turn thefanswitchto“Auto” position.Theblower should
stop after a 65 second delay.
6. Slowlylowerthecoolingtemperatureuntiltheunitstarts.
Thecompressor,blowerandfanshouldnowbeoperating.
Allow the unit to run 10 minutes, make sure cool air is
being supplied by the unit.
7. Turn the temperature setting to the highest position,
stopping the unit. The indoor blower will continue to run
for 65 seconds.
8. Turn the thermostat system switch to “OFF” and
disconnect all power when servicing the unit.

12
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
9. 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”.
10. Turn the thermostat system switch to “HEAT” and fan
switch to “AUTO”.
11. Slowly raise the heating temperature setting. When the
heating first stage makes contact, stop raising the
temperature setting.. The compressor, blower and fan
shouldnowbe running withthereversingvalveinthe de-
energized (heating) position. After giving the unit time to
settle out, make sure the unit is supplying heated air.
12. Ifthe outdoor ambient is above80°F,the unitmaytrip 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.
13. 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: Ifoutdoorthermostatsareinstalledtheoutdoor
ambientmustbebelowthesetpointofthesethermostats
for the heatersto operate. It may be necessary to jumper
these thermostats to check heater operation if outdoor
ambient is mild.
14. For thermostats with emergency heat switch, return to
step 11. The emergency heat switch is located at the
bottomofthethermostat.Movetheswitchtoemergency
heat.Theheatpumpwillstop,theblowerwillcontinueto
run, all heaters will come on and the thermostat
emergency heat light will come on.
15. If checking the unit in the wintertime, when the outdoor
coiliscoldenoughto actuatethe defrostcontrol,observe
at least one defrost cycle to make sure the unit defrosts
completely.
FINAL SYSTEM CHECKS
16. Checktoseeifallsupplyandreturnairgrillesareadjusted
and the air distribution system is balanced for the best
compromise between heating and cooling.
17. Check for air leaks in the ductwork. See Sections on Air
Flow Adjustments.
18. Make sure the unit is free of “rattles”, and the tubing in
the unit is free from excessive vibration. Also make sure
tubesor linesarenot rubbingagainst eachotheror sheet
metal surfaces or edges. If so, correct the trouble.
19. Set the thermostat at the appropriate setting for cooling
and heating or automatic changeover for normal use.
20. 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
data for service that apply to summer air conditioning apply to
theheat pump. Mostapply onthe heatingcycle exceptthat“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
devicetothe outdoorcoil(condenseron thecoolingcycle)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.
The following figures show a schematic of a heat pump on the
coolingcycleandtheheatingcycle. Inadditiontoareversingvalve,
aheatpumpisequippedwithanexpansiondeviceandcheckvalve
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.

13
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
difference in the outdoor temperature and the outdoor coil tem-
perature, the greater the heating capacity of the heat pump. This
phenomenon is a characteristic of a heat pump. It is a good prac-
ticetoprovidesupplementaryheatforallheatpumpinstallations
in areas where the temperature drops below 45° F. It is also a
good practice to provide sufficient supplementary heat to handle
theentireheatingrequirementshould therebe acomponentfail-
ure 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 andthe supplementary heatersareener-
gized.
DEFROST CONTROL
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 to30, 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),
the defrost cycle is terminated and the timing period is reset. If
the defrost cycle is not terminated due to the sensor tempera-
ture, 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
installed properly. However it is recommended that the home-
ownerinspecttheunitbeforeaseasonalstartup. Thecoilsshould
be free of debris so adequate airflow is achieved. The return and
supply registers should be free of any obstructions. The filters
should be cleaned or replaced. These few steps will help to keep
the product up time to a maximum. The Service section that fol-
lowsshould help inidentifying problemsifthe unit doesnotoper-
ate properly.

14
FILTERS
CAUTION
TO PREVENT PROPERTY DAMAGE DUE TO FIRE AND LOSS OF
EQUIPMENT EFFICIENCY OR EQUIPMENT DAMAGE DUE TODUST AND LINT
BUILD UP ON INTERNAL PARTS, NEVER OPERATE UNIT WITHOUT AN AIR
FILTER INSTALLED IN THE RETURN AIR SYSTEM.
Every application may require a different frequency of replace-
ment 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
Useafine gradeautomotivewaxon the cabinetfinish to 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
THE FOLLOWING INFORMATION IS FOR USE BY QUALIFIED SER-
VICE 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.
OUTSIDE AIR INTO RETURN DUCT
Do not introduce cold outside air into the return duct of a heat
pumpinstallation. Forunitswith2-speedmotors,do notallowair
entering the indoor coil to drop below 65° F. Air below this tem-
peraturewill causelow dischargepressure,thus lowsuctionpres-
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
The unit’s defrost terminating sensor must make good thermal
contactwiththeoutdoorcoiltubing. Poorcontactmaynottermi-
nate 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 -Ifitis ontheheatingcycle,raise
thedischargepressureby restrictingairflowthroughthe
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.

15
THIS PAGE LEFT BLANK INTENTIONALLY.

16
APPENDIX A BLOWER PERFORMANCE TABLES
DIRECT DRIVE
STANDARD DOWN SHOT AND HORIZONTAL
SPEED TAP EXTERNAL STATIC PRESSURE (ESP)
in w.c.
STANDARD
CFM AMPS WATTS RPM
0.10 1287 1.66 350 770
0.20 1233 1.63 342 815
0.30 1176 1.59 332 858
0.40 1107 1.55 320 891
0.50 1044 1.51 312 924
0.60 965 1.45 296 957
0.10 1476 2.08 446 866
0.20 1421 2.03 432 885
0.30 1334 1.96 414 918
0.40 1255 1.90 396 945
0.50 1180 1.84 386 971
0.60 1085 1.78 368 990
0.70 964 1.70 344 1023
0.30 1455 2.31 490 962
0.40 1367 2.25 476 984
0.50 1277 2.16 454 1006
0.60 1180 2.09 438 1025
0.70 1080 2.02 418 1039
0.80 922 1.90 386 1067
SPEED TAP EXTERNAL STATIC PRESSURE (ESP)
in w.c.
STANDARD
CFM AMPS WATTS RPM
0.10 1296 1.67 356 764
0.20 1245 1.60 334 830
0.30 1174 1.56 325 861
0.40 1103 1.52 316 891
0.50 1013 1.46 300 935
0.10 1502 2.10 456 836
0.20 1449 2.06 444 864
0.30 1396 2.02 432 891
0.40 1335 1.97 418 916
0.50 1273 1.91 404 940
0.60 1153 1.83 380 973
0.70 996 1.71 346 1017
0.20 1516 2.36 506 940
0.30 1454 2.31 496 960
0.40 1392 2.26 486 979
0.50 1273 2.17 458 1006
0.60 1183 2.09 441 1023
0.70 1092 2.02 424 1039
0.80 920 1.90 390 1067
NOTES:
3 Ton models are shipped fromthe factory with speed tapset on LOW.
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/DCH036 DIRECT DRIVE HORIZONTAL
LOW
HIGH
MED
HIGH
DCC/DCH036 DIRECT DRIVE DOWN SHOT
LOW
MED

17
APPENDIX A BLOWER PERFORMANCE TABLES
DIRECT DRIVE
STANDARD DOWN SHOT AND HORIZONTAL
SPEED TAP EXTERNAL STATIC PRESSURE (ESP)
in w.c.
STANDARD
CFM AMPS WATTS RPM
0.10 1602 2.48 528 835
0.20 1538 2.37 506 878
0.30 1474 2.26 484 921
0.40 1390 2.15 460 950
0.50 1306 2.04 436 979
0.10 1805 2.84 620 935
0.20 1704 2.71 590 967
0.30 1625 2.59 558 990
0.40 1549 2.47 540 1012
0.50 1437 2.38 516 1030
0.60 1301 2.23 480 1050
0.70 1158 2.09 444 1072
0.10 1971 3.22 706 968
0.20 1828 3.03 664 998
0.30 1744 2.94 632 1017
0.40 1628 2.80 606 1034
0.50 1510 2.69 582 1050
0.60 1402 2.57 552 1067
SPEED TAP EXTERNAL STATIC PRESSURE (ESP)
in w.c.
STANDARD
CFM AMPS WATTS RPM
0.10 1622 2.54 539 809
0.20 1558 2.43 517 852
0.30 1494 2.32 495 895
0.40 1410 2.21 471 924
0.50 1326 2.10 447 953
0.10 1861 3.11 670 886
0.20 1733 2.78 606 918
0.30 1639 2.64 568 960
0.40 1564 2.51 542 984
0.50 1434 2.35 508 1017
0.60 1320 2.25 482 1039
0.70 1156 2.08 446 1067
0.10 1984 3.34 734 949
0.20 1883 3.18 694 977
0.30 1770 3.03 654 1001
0.40 1656 2.87 620 1027
0.50 1540 2.76 590 1044
0.60 1415 2.62 558 1061
NOTES:
4 Ton models are shipped from the factory with speed tap set on MED.
HIGH
DCC/DCH048 DIRECT DRIVE DOWN SHOT
LOW
MED
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/DCH048 DIRECT DRIVE HORIZONTAL
LOW
MED
HIGH

18
APPENDIX A BLOWER PERFORMANCE TABLES
DIRECT DRIVE
STANDARD DCC/DCH060 DOWN SHOT
SPEED
TAP
EXTERNAL STATIC
PRESSURE (ESP)
in w.c.
STANDARD
CFM AMPS WATTS RPM
0.10 1334 1.65 180 627
0.20 1286 1.75 192 665
0.30 1212 1.83 202 715
0.40 1144 1.94 216 759
0.50 1077 1.99 222 792
0.60 1039 2.10 238 830
0.70 953 2.17 248 874
0.80 904 2.27 258 913
0.90 825 2.30 266 940
0.10 1512 2.12 240 682
0.20 1469 2.24 254 720
0.30 1397 2.31 264 759
0.40 1333 2.44 282 803
0.50 1285 2.54 296 836
0.60 1221 2.59 304 874
0.70 1173 2.72 322 913
0.80 1118 2.77 328 946
0.90 1049 2.90 344 984
0.10 2053 4.27 540 869
0.20 2014 4.39 558 896
0.30 1999 4.60 576 929
0.40 1947 4.68 588 957
0.50 1897 4.79 608 989
0.60 1857 4.87 620 1012
0.70 1763 4.99 640 1050
0.80 1741 5.06 650 1072
0.90 1669 5.19 668 1105
0.10 2137 4.95 634 913
0.20 2093 5.07 652 940
0.30 2095 5.19 670 962
0.40 2026 5.28 682 990
0.50 1980 5.40 698 1018
0.60 1961 5.49 720 1039
0.70 1914 5.58 732 1072
0.80 1845 5.70 742 1100
0.90 1766 5.69 740 1127
0.10 2299 5.70 742 942
0.20 2233 5.80 748 969
0.30 2217 5.90 768 990
0.40 2157 6.07 786 1018
0.50 2131 6.12 804 1045
0.60 2060 6.21 816 1073
0.70 2015 6.30 820 1095
0.80 1940 6.27 816 1111
0.90 1862 6.13 790 1128
NOTES:
T5
DCC/DCH060 DIRECT DRIVE DOWN SHOT
Tables represent dry coil without filter, to compensate for filter add 0.08" to measured E.S.P. SCFM correction for wet coil = 4
%. 5 Ton models are shipped from the factory with speed tap set on T4.
T1
T2
T3
T4

19
APPENDIX A BLOWER PERFORMANCE TABLES
DIRECT DRIVE
STANDARD DCC/DCH060 HORIZONTAL
SPEED
TAP
EXTERNAL STATIC
PRESSURE (ESP)
in w.c.
STANDARD
CFM AMPS WATTS RPM
0.10 1355 1.57 174 599
0.20 1281 1.66 182 651
0.30 1235 1.76 196 693
0.40 1168 1.81 202 726
0.50 1118 1.94 218 775
0.60 1049 2.03 232 819
0.70 982 2.10 240 858
0.80 922 2.14 246 885
0.90 871 2.25 260 927
0.10 1544 2.04 234 660
0.20 1490 2.17 250 704
0.30 1427 2.25 260 742
0.40 1370 2.35 276 781
0.50 1319 2.42 282 809
0.60 1274 2.52 296 849
0.70 1210 2.62 316 891
0.80 1137 2.73 326 935
0.90 1106 2.77 336 957
0.10 2099 4.13 516 825
0.20 2068 4.25 536 852
0.30 2029 4.37 552 885
0.40 1971 4.48 568 913
0.50 1911 4.61 586 950
0.60 1876 4.73 604 973
0.70 1821 4.86 622 1012
0.80 1792 4.91 630 1028
0.90 1740 5.03 648 1067
0.10 2233 4.76 608 863
0.20 2168 4.91 628 896
0.30 2125 5.02 640 924
0.40 2070 5.14 660 951
0.50 2050 5.27 678 979
0.60 1980 5.41 696 1012
0.70 1954 5.47 704 1034
0.80 1893 5.60 724 1067
0.90 1852 5.70 736 1089
0.10 2322 5.44 710 904
0.20 2294 5.55 726 934
0.30 2254 5.68 742 958
0.40 2201 5.80 766 990
0.50 2147 5.93 782 1017
0.60 2117 6.01 788 1039
0.70 2081 6.12 808 1060
0.80 2017 6.22 822 1094
0.90 1932 6.10 804 1111
NOTES:
5 Ton models are shipped from the factory with speed tap set on T4.
T5
DCC/DCH060 DIRECT DRIVE HORIZONTAL
Tables represent dry coil without filter, to compensate for filter add 0.08" to measured E.S.P. SCFM correction for wet coil = 4
%.
T1
T2
T3
T4

20
APPENDIX A BLOWER PERFORMANCE TABLES
BELT DRIVE
STANDARD DOWN SHOT
DCC/DCH036 STANDARD BELT DRIVE DOWN SHOT
CFM BHP CFM BHP CFM BHP CFM BHP CFM BHP CFM BHP
0.2 1424 0.30 1239 0.23
0.4 1520 0.39 1292 0.29 1073 0.22 779 0.14
0.6 1439 0.40 1192 0.30 944 0.21 619 0.12
0.8 1350 0.42 1101 0.31 864 0.22
1.0 1028 0.31 729 0.21
1.2 675 0.20
DCC/DCH048 STANDARD BELT DRIVE DOWN SHOT
CFM BHP CFM BHP CFM BHP CFM BHP CFM BHP CFM BHP
0.2 2129 0.64 1795 0.47 1550 0.35
0.4 1994 0.65 1701 0.49 1433 0.36 1163 0.22
0.6 1905 0.67 1606 0.50 1326 0.36 1025 0.22
0.8 1808 0.69 1565 0.54 1216 0.36
1.0 1473 0.55 1137 0.32
1.2 1103 0.41
DCC/DCH060 STANDARD BELT DRIVE DOWN SHOT
CFM BHP CFM BHP CFM BHP CFM BHP CFM BHP CFM BHP
0.2 2579 1.01 2368 0.85 2175 0.6909 1961 0.55
0.4 2513 1.05 2318 0.89 2089 0.73 1906 0.59 1666 0.44
0.6 2514 1.14 2276 0.94 2045 0.77 1797 0.60 1604 0.47
0.8 2261 1.01 2017 0.82 1760 0.63
1.0 1989 0.87 1730 0.68
1.2 1695 0.72
DCC/DCH072 STANDARD BELT DRIVE DOWN SHOT
CFM BHP CFM BHP CFM BHP CFM BHP CFM BHP CFM BHP
0.2 2771 1.27 2567 1.05 2421 0.88 2220 0.71
0.4 2753 1.38 2573 1.15 2382 0.95 2186 0.77 1980 0.61
0.6 2655 1.42 2548 1.24 2360 1.02 2119 0.81 1934 0.65
0.8 2470 1.30 2331 1.11 2111 0.89 1868 0.69
1.0 2296 1.18 2078 0.96 1840 0.75
1.2 2040 1.02
NOTES:
ESP, In
H
2
O
TURNS OPEN
012345
Tables representdry coil without filter,to compensate for filter add 0.08" to measured E.S.P.
SCFM correction for wet coil = 4 %.
ESP, In
H
2
O
TURNS OPEN
012345
ESP, In
H
2
O
TURNS OPEN
012345
ESP, In
H
2
O
TURNS OPEN
012345