Goodman IO-367B User manual

All information contained herein is subject to change without notice.
I NSTALLATION I NSTRUCTIONS F OR
L IGHT C OMMERCIAL S ELF -C ONTAINED
P ACKAGED H EATING & C OOLING U NIT
15 & 20 T ON CPC
RECOGNIZE THIS SYMBOL AS A SAFETY PRECAUTION.
ATTENTION INSTALLING PERSONNEL
Prior to installation, thoroughly familiarize yourself with this Installation Manual. Observe all safety warnings.
During installation or repair, caution is to be observed.
It is your responsibility to install the product safely and to educate the customer on its safe use.
CUS
®
NOTE: Please contact your distributor or
our website for the applicable
Specification Sheet referred to in
this manual.
These installation instructions cover the outdoor
installation of single package electric heating and
coolingunits. SeetheSpecificationSheetapplicable
toyourmodel for information regarding accessories.
©2010 Goodman Manufacturing Company, L.P.
5151 San Felipe, Suite 500 ◊ Houston, TX 77056
www.goodmanmfg.com www.amana-hac.com
IO-367B
7/10

2
REPLACEMENT PARTS
ORDERING PARTS
Whenreportingshortagesordamages,ororderingrepair
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
GOODMAN MANUFACTURING COMPANY, L.P.
7401 SECURITY WAY
HOUSTON, TEXAS 77040
877-254-4729
SAFETY INSTRUCTIONS
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
D O NOT CONNECT TO OR USE ANY DEVICE THAT IS NOT DESIGN
CERTIFIED BY G OODMAN FOR USE WITH THIS UNIT . S ERIOUS
PROPERTY DAMAGE , PERSONAL INJURY , REDUCED UNIT
PERFORMANCE AND / OR HAZARDOUS CONDITIONS MAY RESULT FROM
THE USE OF SUCH NON - APPROVED DEVICES .
WARNING
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
WARNING
TO AVOID PROPERTY DAMAGE, PERSONAL INJURY OR DEATH, DO NOT USE
THIS UNIT IF ANY PART HAS BEEN UNDER WATER. IMMEDIATELY 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.
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
Index
Replacement Parts ........................................................2
Safety Instructions ........................................................2
General Information ......................................................3
Unit Location .................................................................4
Clearances .....................................................................6
Roof Curb Post-Installation Checks ............................6
Roof Top Duct Connections .........................................6
Rigging Details ..............................................................7
Electrical Wiring ............................................................8
Circulating Air and Filters...........................................10
Venting .........................................................................10
Condensate Drain Connection ...................................10
Startup, Adjustments, and Checks ............................10
Air flow Adjustments...................................................13
Motor Sheave Adjustments ........................................14
Maintenance ................................................................14
Service .........................................................................15
Appendix A Blower Performance Data ......................16
Belt Drive - Standard ...................................................16
Belt Drive - High Static................................................17
Appendix B Electrical Data.........................................18
Appendix C Unit Dimensions .....................................19

3
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.
HIGHVOLTAGE!
I NSTALLATION  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 ,
H
EATING , 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 .
WARNING
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.
This unit is approved for outdoor installation ONLY. To
assure that your unit operates safely and efficiently, it must
be installed, operated, and maintained in accordance with
these installation and operating instructions, all local building
codes and ordinances.
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 instal-
lation in accordance with National Codes. It is the installer’s
responsibility to install the product in accordance with Na-
tional 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
byanapprovedmethodorinaccordancewithASHRAEGuide
or Manual J - Load Calculations published by the Air Condi-
tioning Contractors of America.
Obtain from:
American National Standards Institute
1430 Broadway
New York, NY 10018
Systemdesignandinstallationshouldalso, where applicable,
followinformationpresentedinacceptedindustryguidessuch
as the ASHRAE Handbooks. The manufacturer assumes no
responsibility for equipment installed in violation of any code
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 con-
nections; and drain connections (if required). The internal
systemsoftheunitarecompletely factory-installedandtested
prior to shipment.
Units are generally installed on a steel roof mounting curb
assembly which has been shipped to the job site for installa-
tion on the roof structure prior to the arrival of the unit. The
model number shown on the unit’s identification plate identi-
fies the various components of the unit such as refrigeration
tonnage, heating input and voltage.
Carefully inspect the unit for damage. Any bolts or screws
which may have loosened in transit must be re-tightened. In
the event of damage, the receiver should:
1. Make notation on delivery receipt of any visible
damage to shipment or container.
2. Notify carrier promptly and request an inspection.
3. In case of concealed damage, carrier should be
notified as soon as possible-preferably within 5 days.
4. File theclaimwiththefollowingsupportingdocuments:
a. Original Bill of Lading, certified copy, or indemnity
bond.
b. Original paid freight bill or indemnity in lieu thereof.
c. Original invoice or certified copy thereof, showing
trade and other discounts or reductions.
d. Copy of the inspection report issued by carrier
representative at the time damage is reported to the
carrier. The carrier is responsible for making prompt
inspection of damage and for a thorough
investigation of each claim. The distributor or
manufacturer will not accept claims from dealers for
transportation damage.
NOTE: When inspecting the unit for transportation damage,
remove all packaging materials. Recycle or dispose of the
packaging material according to local codes.
PRE-INSTALLATION CHECKS
Carefully read all instructions for the installation prior to in-
stalling unit. Ensure each step or procedure is understood
and any special considerations are taken into account be-
fore starting installation. Assemble all tools, hardware and
suppliesneededtocompletetheinstallation.Someitemsmay
need to be purchased locally.

4
UNIT LOCATION
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
installation of the unit. See important note under Roof Curb
Installation Only.
ALL INSTALLATIONS:
IMPORTANT NOTE: Unitshouldbeenergized24hoursprior
to compressor start up to ensure crankcase heater has
sufficientlywarmedthecompressors.Compressordam-
age 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.
Improper installation can result in problems ranging from
noisy operation to property or equipment damages, danger-
ous conditions that could result in injury or personal property
damage and could void the warranty. Give this booklet to the
user and explain it’s provisions.The user should retain these
instructions for future reference.
•For proper operation and condensate drainage, the
unit must be mounted level.
•The flue outlet hood must be at least three feet above
any forced air inlet located within ten feet. The
economizer/manual fresh air intake/motorized fresh
air intake and combustion air inlet mounted on the
unit are not affected by this restriction.
•Do not locate the unit in an area where the outdoor
air (i.e. combustion air for the unit) will be frequently
contaminated by compounds containing chlorine or
fluorine.Commonsourcesofsuchcompoundsinclude
swimmingpoolchemicalsandchlorinebleaches,paint
stripper, adhesives, paints,varnishes,sealers,waxes
(which are not yet dried) and solvents used during
constructionandremodeling.Variouscommercialand
industrial processes may also be sources of chlorine/
fluorine compounds.
•To avoid possible illness or death of the building
occupants, do NOT locate outside air intake device
(economizer, manualfresh air intake,motorizedfresh
air intake) too close to an exhaust outlet, gas vent
termination, or plumbing vent outlet. For specific
distances required, consult local codes.
•Allow minimum clearances from the enclosure for fire
protection,proper operation, and serviceaccess (see
Unit Clearances). These clearances must be
permanently maintained.
•Whentheunitisheating, the temperature of the return
airenteringthe unit must be between50°Fand100°F.
GROUND LEVEL INSTALLATIONS ONLY:
•When the unit is installed on the ground adjacent to
the building, a level concrete (or equal) base is
recommended. Prepare a base that is 3” larger than
the package unit footprint and a minimum of 3” thick.
•The base should also be located where no runoff of
water from higher ground can collect in the unit.
ROOF TOP INSTALLATIONS ONLY:
•To avoid possible propertydamage or personal injury,
theroofmusthavesufficientstructuralstrengthtocarry
the weight of the unit(s) and snow or water loads as
requiredbylocalcodes. Consult a structural engineer
to determine the weight capabilities of the roof.
•The unit may be installed directly on wood floors or
onClassA,ClassB,orClassCroofcoveringmaterial.
•To avoid possible personal injury, a safe, flat surface
for service personnel should be provided.
•As indicated on the unit’s data plate, a minimum
clearance of 36” to any combustible material is
requiredontheaccesssideoftheunit. Allcombustible
materials must be kept out of this area.
•This 36” clearance must also be maintained to insure
propercombustionairflow. Thecombustionairintake
must not be blocked for any reason, including
blockage by snow.
•Adequate clearances from the unit to any adjacent
publicwalkways,adjacentbuildings,buildingopenings
or openable windows must be maintained in
accordance with National Codes.
UNIT PRECAUTIONS
• Do not stand or walk on the unit.
• Except for holes in the wiring entrances (see Figure
below), do not drill holes anywhere in panels or in
the base frame of the unit. Unit access panels
provide structural support.
ELECTRICAL ENTRANCE LOCATIONS
• Donotremove any access panels until unithasbeen
installed on roof curb or field supplied structure.
• Do not roll unit across finished roof without prior
approval of owner or architect.

5
• Do not skid or slide on any surface as this may
damage unit base. The unit must be stored on a
flat, level surface. Protect the condenser coil
because it is easily damaged.
ROOF CURB INSTALLATIONS ONLY:
Before installing this unit...
IMPORTANTNOTE:This unit has been equippedwitha ship-
ping brace under the compressor section that MUST BE RE-
MOVED before installing the unit on a roof curb.
Please follow the instructions below to remove brace.
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
1. Remove wooden struts and shipping brace per
installation instructions. The struts are located in the
fork holes and are used to protect the unit from
damage while lifting with forks. The shippping brace
is located underneath the unit (under compressors).
Also remove the fork hole brackets as shown in the
following figure.
2. Locate and remove the endbracketsasshownbelow.
LIFT OVERAPPROXIMATE
CENTER OF UNIT
SPREADER BARS
MUST BE USED WITH
LIFTING STRAPS THAT
ARE LESS THAN 16
FEET LONG
REMOVE 2 BRACKETS
ON EACH END TO
REMOVE
WOODEN STRUTS
REMOVE 2 BRACKETS
ON EACH END TO
REMOVE
SHIPPING BRACE
3.Liftunitperthe“RiggingDetails”sectionofthismanual,
observing all warnings and cautions. When unit is
lifted, boards and shipping brace will drop if screws
havebeen removed. To avoid injury, STAND CLEAR.
4. Dispose of the boards and brace appropriately.
Curb installations must comply with local codes and should
be done in accordance with the established guidelines of the
National Roofing 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, level-
ing and mounting on the roof structure are the responsibility
of the installing contractor. All required hardware necessary
for the assembly of the sheet metal curb is included in the
curb accessory.
T O PREVENT POSSIBLE EQUIPMENT DAMAGE , PROPERTY DAMAGE ,
PERSONAL INJURY OR DEATH , THE FOLLOWING BULLET POINTS MUST
BE OBSERVED WHEN INSTALLING THE UNIT .
WARNING
•Sufficientstructuralsupport must bedetermined prior
to locating and mounting the curb and package unit.
•Ductwork must be constructed using industry
guidelines. The duct work must be placed into the
roof curb before mounting the package unit. Our full
perimeter curbs include duct connection frames to be
assembled with the curb. Cantilevered type curbs
are not available from the factory.
•Curb insulation, cant strips, flashing and general
roofing material are furnished by the contractor.
The curbs must be supported on parallel sides by roof mem-
bers. The roof members must not penetrate supply and re-
turn duct opening areas as damage to the unit might occur.
NOTE: The unit and curb accessories are designed to allow
vertical duct installation before unit placement. Duct
installation after unit placement is not recommended.

6
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
installation instructions.
CLEARANCES
36”; minimum
roof overhang
UNIT CLEARANCES
Adequateclearancearound the unit should bekept for safety,
service,maintenance,andproperunitoperation. Atotalclear-
ance of 75” on the main control panel side of the unit is rec-
ommended to facilitate possible fan shaft, coil, electric heat
andgasfurnaceremoval. Aclearance of 48” is recommended
on all other sides of the unit to facilitate possible compressor
removal, to allow service access and to insure proper venti-
lation and condenser airflow. The unit must not be installed
beneath any obstruction. The unit should be installed re-
mote from all building exhausts to inhibit ingestion of exhaust
air into the unit fresh air intake.
Insulated
Panels
Roof Curb Installation
ROOF CURB POST-INSTALLATION
CHECKS
After installation, check the top of the curb, duct connection
frame and duct flanges to make sure gasket has been ap-
plied properly. Gasket should be firmly applied to the top of
the curb perimeter, duct flanges and any exposed duct con-
nection frame. If gasket is loose, re-apply using strong
weather resistant adhesive.
PROTRUSION
Inspect curb to ensure that none of the utility services (elec-
tric) 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.

7
RIGGING DETAILS
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.
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
72”
TO PREVENT DAMAGE TO THE UNIT .
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.
• Lifting cables should be attached to the unit with
shackles.
• The distance between the crane hook and the top of
the unit must not be less than 60”.
• Two spreader bars must span over the unit to prevent
damage to the cabinet by the lift cables. Spreader
bars must be of sufficient length so that cables do not
come in contact with the unit during transport.
Remove wood struts mounted beneath unit base
frame before setting unit on roof curb. These struts
are intended to protect unit base frame from fork lift
damage. Removal is accomplished by extracting the
sheet metal retainers and pulling the struts through
the base of the unit. Refer to rigging label on the unit.
Important: If using bottom discharge with roof curb, duct-
work should be attached to the curb prior to installing the
unit. Ductwork dimensions are shown in Roof Curb Installa-
tion Instructions.
RefertotheRoof Curb InstallationInstructionsforproper curb
installation. Curbing must be installed in compliance with the
National Roofing Contractors Association Manual.
Lower unit carefully onto roof mounting curb. While rigging
unit, center of gravity will cause condenser end to be lower
than supply air end.
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
To assist in determining rigging requirements, unit weights
are shown as follows:
COMPRESSOR 1
COMPRESSOR 2
CG
EVAPORATORCOILS
A
B
C
XD
Y
CORNER & CENTER OF GRAVITY LOCATIONS

8
CPC Weights
(lbs) CPC Weights (lbs)
15 Tons 20 Tons
Corner Weight - A 580 655
Corner Weight - B 540 535
Corner Weight - C 475 510
Corner Weight - D 440 420
Unit Shipping Weight 2150 2235
Unit Operating Weight 2035 2120
X (Inches) 60" 58"
Y (Inches) 43" 40"
DATA
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
Bringcondenserendofunit into alignment with the curb. With
condenser end of the unit resting on curb member and using
curb as a fulcrum, lower opposite end of the unit until entire
unit is seated on the curb. When a rectangular cantilever
curb is used, care should be taken to center the unit. Check
for proper alignment and orientation of supply and return
openings with duct.
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
Removespreader bars, lifting cables and otherrigging equip-
ment.
ELECTRICAL WIRING
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
maximum overcurrent protection device. DO NOT EXCEED
THE MAXIMUM OVERCURRENT DEVICE SIZE SHOWN
ON UNIT DATA PLATE.
All line voltage connections must be made through weather-
proof 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
wiringtoaccessory controls must bedone in accordance with
these instructions, the latest edition of the National Electrical
Code (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).
Themain power supply shallbe three-phase, three wire. The
unit is factory wired for the voltage shown on the unit’s data
plate.
NOTE: Ifsupply voltageis 208V, allleadson primary of trans-
former TRANS1 must be moved from the 230V to the 208V
tap.
Main power wiring should be sized for the minimum wire
ampacity shown on the unit’s data plate. Size wires in accor-
dance with the ampacity tables inArticle 310 of the National
Electrical Code. If long wires are required, it may be neces-
sary to increase the wire size to prevent excessive voltage
drop. Wires should be sized for a maximum of 3% voltage
drop.

9
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 unit total load, must be field installed. An external field
supplied disconnect may be mounted on the exterior panel.
Ensure the data plate is not covered by the field-supplied
disconnect switch.
• Some disconnect switches are not fused. Protect the
power leads at the point of distribution in accordance
with the unit’s data plate.
• The unit must be electrically grounded in accordance
with local codes or, in the absence of local codes,
with the latest edition of the National Electrical Code
(ANSI-NFPA 70). A ground lug is provided for this
purpose. Size grounding conductor in accordance
with Table 250-95 of the National Electrical Code. Do
not use the ground lug for connecting a neutral
conductor.
• ConnectpowerwiringtotheSinglePointPowerblock.
This terminal block is located within the main control
box.
Low Voltage
Terminal Strip
Thermostat wiring
for all units
connect to low
voltage strip
Ground
Lug
Line voltage connects
to power block on
Coolers and the 230v
Gas Packs
Line voltage connects
to middle contactor
on 460v and 575v
Gas Packs
Power Block
(Coolers &
230V Gas Packs
Only)
Field wiring enters
from this direction
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.
UNITS INSTALLED ON ROOF TOPS
Mainpower and low voltage wiring mayenter the unit through
the side or through the roof curb. Install conduit connectors
at the desired entrance locations. External connectors must
be weatherproof. All holes in the unit base must be sealed
(including those around conduit nuts) to prevent water leak-
age into building. All required conduit and fittings are to be
field supplied.
Supply voltage to roof top unit must not vary by more than
10% of the value indicated on the unit’s data plate. Phase
voltage unbalance must not exceed 2%. Contact your local
power company for correction of improper voltage or phase
unbalance.
ELECTRICAL ENTRANCE LOCATIONS
Unit is equipped with Single Point Power Block and Low Volt-
age Block.
LOW VOLTAGE CONTROL WIRING
1. A24V thermostat must be installed for unit operation.
It may be purchased with the unit or field -supplied.
Thermostats may be programmable or
electromechanical as required.
2. Locate thermostatorremote sensor in the conditioned
space where it will sense average temperature. Do
notlocatethedevicewhere it may be directly exposed
to supply air, sunlight or other sources of heat. Follow
installationinstructionspackagedwith the thermostat.

10
3. Use #18 AWG wire for 24V control wiring runs not
exceeding 75 feet. Use #16AWG wire for 24V control
wiring runs not exceeding 125 feet. Use #14 AWG
wire for 24V control wiring runs not exceeding 200
feet. Low voltage wiring may be National Electrical
Code (NEC) Class 2 where permitted by local codes.
4. Route thermostat wires from sub-base terminals to
the unit. Control wiring should enter through the duct
panel (dimple marks entrance location). Connect
thermostat and 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 connecting thermostat wires to
terminals on sub-base. DO NOT use larger than #18 AWG
wire. A transition to #18 AWG wire may be required before
entering thermostat sub-base.
TERMINAL THERMOSTAT
Red R (24V)
Green G(Fan)
Orange O (Rev.Valve)
White W1 (Heat, 2nd)*
Yellow Y1 (Low Cool)
Purple Y2 (High Cool)
C
(
Blue
)
C
(
Common
)
*Optional field installed heat connections
CPC240
CIRCULATING AIRAND FILTERS
DUCTWORK
The supply duct from the unit through a wall may be installed
without clearance. However, minimum unit clearances must
be maintained (see “Clearances” section). The supply duct
should be provided with an access panel large enough to
inspect the air chamber downstream of the heat exchanger.
A cover should be tightly attached to prevent air leaks.
Ductwork dimensions are shown in the roof curb installation
manual.
If desired, supply and return duct connections to the unit may
be made with flexible connections to reduce possible unit
operating sound transmission.
VENTING
NOTE: Venting is self-contained.
CONDENSATE DRAIN CONNECTION
CONDENSATE DRAIN CONNECTION
A 3/4” NPT drain connection is supplied for condensate pip-
ing. An external trap must be installed for proper condensate
drainage.
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
Drainage of condensate directly onto the roof may be ac-
ceptable; refer to local code. It is recommended that a small
drip pad of either stone, mortar, wood or metal be provided to
prevent any possible damage to the roof.
CLEANING
Due to the fact that drain pans in any air conditioning unit
will have some moisture in them, algae and fungus will grow
due to airborne bacteria and spores. Periodic cleaning is
necessary to prevent this build-up from plugging the drain.
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