Goodman DCC180 Installation Manual
INSTALLATION INSTRUCTIONS
DCC SERIES
LIGHT COMMERCIAL PACKAGED HEATING AND COOLING UNIT
15 to 25 TON
Index
Replacement Parts................................................................ 2
Safety Instructions................................................................2
General Information ............................................................. 2
Unit Location ........................................................................ 3
Clearances ............................................................................ 5
Roof Curb Post-Installation Checks ....................................... 6
Roof Top Duct Connections................................................... 6
Rigging Details ...................................................................... 6
NOTE: 15 & 20 ton model shown in picture.
25 ton model has 2 fans.
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.
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.
Electrical Wiring.................................................................... 7
Circulating Air and Filters...................................................... 9
Condensate Drain Connection .............................................. 9
Startup, Adjustments, and Checks ...................................... 10
Airflow Adjustments........................................................... 11
Motor Sheave Adjustments ................................................ 12
Maintenance ...................................................................... 13
Appendix A Blower Performance Data................................ 15
Belt Drive - Standard ..................................................... 15
Belt Drive - High Static................................................... 16
Appendix B Electrical Data.................................................. 17
Appendix C Unit Dimensions............................................... 18
Appendix D Wiring Diagrams .............................................. 19
Start-up Checklist................................................................ 2
5
IOD-1003B
5/2015
Our continuing commitment to quality products may mean a change in specifications without notice.
© 2013, 2015
5151 San Felipe St., Suite 500, Houston, TX 77056
www.daikincomfort.com
WARNING
T
HIS PRODUCT CONTAINS OR PRODUCES A CHEMICAL OR CHEMICALS
WHICH MAY CAUSE SERIOUS ILLNESS OR DEATH AND WHICH ARE
KNOWN TO THE STATE OF CALIFORNIA TO CAUSE CANCER, BIRTH
DEFECTS OR OTHER REPRODUCTIVE HARM
.
WARNING
HIGH V OLTAG E!
ISCONNECT ALL POWER BEFORE SERVICING OR
D
INSTALLING THIS UNIT
BE PRESENT
DAMAGE, PERSONAL INJURY OR DEATH
. F
. M
AILURE TO DO SO MAY CAUSE PROPERTY
ULTIPLE POWER SOURCES MAY
.
REPLACEMENT PARTS
ORDERING PARTS
When reporting shortages or damages, or ordering repair
parts, give the complete unit model and serial numbers as
stamped on the unit’s nameplate.
Replacement parts for this appliance are available through
your contractor or local distributor. For the location of your
nearest distributor, consult the white business pages, the
yellow page section of the local telephone book or contact:
CONSUMER AFFAIRS
DAIKIN NORTH AMERICA LLC
7401 SECURITY WAY
HOUSTON, TEXAS 77040
855-770-5678
SAFETY INSTRUCTIONS
TO THE INSTALLER
Before installing this unit, please read this manual to
familiarize yourself on the specific items which must be
adhered to, including maximum external static pressure to
unit, air temperature rise, minimum or maximum CFM and
motor speed connections.
Keep this literature in a safe place for future reference.
CAUTION
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
.
WARNING
T
O 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!
I
NSTALLATION AND REPAIR OF THIS UNIT SHOULD BE
PERFORMED
MINIMUM) THE REQUIREMENTS OF AN
ECHNICIAN” AS SPECIFIED BY THE AIR CONDITIONING
T
EATING, AND REFRIGERATION INSTITUTE
H
TTEMPTING TO INSTALL OR REPAIR THIS UNIT WITHOUT
A
SUCH BACKGROUND MAY RESULT IN PRODUCT DAMAGE
PERSONAL INJURY OR DEATH
ONLY BY
INDIVIDUALS MEETIN G (AT A
“E
NTRY LEVEL
(AHRI).
.
GENERAL INFORMA TION
This unit is approved for outdoor installation ONLY . Rate d perfor mance is achieved after 7 2 hours of operation. Rated performance
is delivered at the specified airflow. See outdoor unit specification 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 products. Within the website, please select the residential or commercial products menu and then select the submenu for the type
of product to be installed, such as air conditioner s or heat pumps,
to access a list of product pages that each contain links to that
model’s specification sheet.
,
,
To assure that your unit operates safely and efficiently, it must be
installed, operated, and maintained in accordance with these installation and operating instructions, all local building codes and
ordinances.
2
EPA REGULATIONS
IMPORTANT: THE UNITED STATES ENVIRONMENTAL PROTECTION AGENCY (EPA)
HAS ISSUED VARIOUS REGULATIONS REGARDING THE INTRODUCTION AND DISPOSAL
REFRIGERANTS IN THIS UNIT. FAILURE TO FOLLOW THESE REGULATIONS MAY
OF
THE ENVIRONMENT AND CAN LEAD TO THE IMPOSITION OF SUBSTANTIAL
HARM
. BECAUSE REGULATIONS MAY VARY DUE TO PASSAGE OF NEW LAWS, WE
FINES
A CERTIFIED TECHNICIAN PERFORM ANY WORK DONE ON THIS UNIT.
SUGGEST
SHOULD YOU HAVE ANY QUESTIONS PLEASE CONTACT THE LOCAL OFFICE OF THE
EPA.
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 ma terials. Recycle or dispose of the packaging
material according to local codes.
NATIONAL CODES
This product is designed and manuf actured to permit installation
in accordance with National Codes. It is the installer’s responsibility 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 calculat e d by an approv ed
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, follow information pr esente d in accepted industr y guides such as the
ASHRAE Handbooks. The manufacturer assumes no r esponsibility
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 connections; and drain connections (if required). The internal systems of the unit are completely factoryinstalled and tested prior to shipment.
Units ar e generally installed on a s teel roof mounting curb assembly which has been shipped to the job site for installation on the
roof structure prior to the arrival of the unit. The model number
shown on the unit’s identifica tion plate identifies the v arious 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, c arrier should be notified as
soon as possible-preferably within 5 days.
4. File the claim with the following supporting documents:
a. Original Bill of Lading, certified copy, or indemnity bond.
b. Original paid freight bill or indemnity in lieu thereof.
c. Original invoice or certified copy thereof, showing trade
and other discounts or reductions.
PRE-INSTALLATION CHECKS
Carefully read all ins tructions for the installa tion prior t o installing
unit. Ensure each step or procedur e is understood and an y s pecial
considerations are taken into account before starting installation.
Assemble all tools, hardware and supplies needed t o complete the
installation. Some items may need to be purchased locally.
UNIT LOCATION
WARNING
TO
PREVENT POSSIBLE EQUIPMENT DAMAGE, PROPERTY DAMAGE
PERSONAL INJURY OR DEATH, THE FOLLOWING BULLET POINTS MUST
BE OBSERVED WHEN INSTALLING THE UNIT
.
,
IMPORTANT NOTE: Remove wood shipping rails prior to installation of the unit. See important note under Roof Curb Installation
Only.
ALL INSTALLATIONS:
I
MPORTANT NOTE: Unit should be energized 24 hours prior to
compressor start up to ensure crankcase heater has sufficiently warmed the compressors. Compressor damage may
occur if this step is not followed.
NOTE: Appliance is shipped from factory for vertical duct
application.
Proper installation of the unit ensures trouble-free oper ation. Improper installation can result in problems ranging from noisy
operation to property or equipment damages, dangerous conditions that could result in injury or per sonal pr operty damage. 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 a t leas t three feet abov e 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 ar e not aff ected
by this restriction.
• Do not locate the unit in an area where the outdoor air
3
(i.e. combustion air for the unit) will be frequently
contaminated by compounds containing chlorine or
fluorine. Common sources of such compounds include
swimming pool chemicals and chlorine bleaches, paint
stripper , adhesiv es, paints, varnishes, sealer s, waxe s (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.
• To avoid possible illness or death of the building occupants,
do NOT locate outside air intake device (economizer,
manual fresh air intake, motorized fresh air intake) too
close to an exhaust outlet, gas vent termination, or
plumbing vent outlet. For specific distances required,
consult local codes.
• Allow minimum clearances from the enclosure for fire
protection, proper oper ation, and service access (see Unit
Clearances). These clearances must be permanently
maintained.
• When the unit is heating, the temperature of the return
air entering the unit must be between 50°F and 100°F.
GROUND LEVEL INSTALLATIONS ONLY:
• When the unit is installed on the ground adjacent to the
building, a level concrete (or equal) base is r ecommended.
Prepare a base that is 3” larger than the package unit
footprint and a minimum of 3” thick.
• The base should also be loc a te d where no runoff of w at er
from higher ground can collect in the unit.
ROOF TOP INSTALLATIONS ONLY:
• To avoid possible property damage or personal injury, the
roof must have sufficient structural strength to carry the
weight of the unit(s) and snow or water loads as required
by local codes. Consult a s tructural engineer to determine
the weight capabilities of the roof.
• The unit may be installed directly on wood floors or on
Class A, Class B, or Class C roof covering material.
• To avoid possible personal injury, a safe, flat surface for
service personnel should be provided.
• As indica ted on the unit’s dat a plate, a minimum cle arance
of 36” to any combustible material is requir ed on the access
side of the unit. All combustible materials must be kept
out of this area.
• This 36” clearance must also be maintained to insure
proper combustion air flow. The combustion air intake
must not be blocked for any re ason, including blockage by
snow.
• Adequate clearances fr om the unit to any adjacent public
walkways, adjacent buildings, building openings or
openable windows must be maintained in accor dance with
National Codes.
• Do not stand or walk on the unit.
• Do not drill holes anywhere in panels or in the ba se frame
of the unit (except where indicated). Unit access panels
provide structural support.
• Do not remove any access panels until unit has been
installed on roof curb or field supplied structure.
• Do not roll unit across finished roof without prior appr oval
of owner or architect.
• Do not skid or slide on any surface as this may damage
unit base. The unit must be stor ed on a flat, level surf ace.
Protect the condenser coil because it is easily damaged.
ROOF CURB INSTALLATIONS ONLY:
Before installing this unit...
IMPORTANT NOTE: This unit has been equipped with a shipping
brace under the compre ssor section that MUST BE REMOVED be-
fore installing the unit on a roof curb.
Please follow the instructions below to remove brace.
CAUTION
W
HEN UNIT IS SUSPENDED, BOARDS AND SHIPPING BRACE WILL DROP WHEN
SCREWS ARE REMOVED
R
EMOVE FORK HOLE BRACKETS, BOARDS AND SHIPPING BRACE FROM BOTTOM
UNIT BEFORE PLACING UNIT ONTO CURB
OF
. TO
PREVENT PERSONAL INJURY
, STAND CLEAR.
.
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 shipping 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 end brackets as shown in the
following graphic.
UNIT PRECAUTIONS
4
REMOVE 2 BRACKETS
ON EACH END TO
REMOVE
SHI PPING B RACE
LIFT OVER APPROXIMATE
CENTER OF UNIT
SPREADER BARS
MUST BE USED WITH
LIFTING ST RAPS THAT
ARE LESS T HAN 16
FEET LONG
REMOVE 2 BRACKETS
ON EACH END TO
REMOVE
WOODEN STRUTS
• 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
include duct connection frames t o be assemble d with the
curb. Cantilevered type curbs are not available from the
factory.
• Curb insulation, cant strips, flashing and general roofing
material are furnished by the contractor.
The curbs must be supported on parallel sides by roof members.
The roof members must not penetrate supply and return duct
opening areas as damage to the unit might occur.
NOTE: The unit and curb accessories are designe d to allo w vertical
duct installation before unit placement. Duct inst allation after unit
placement is not recommended.
CAUTION
ALL
CURBS LOOK SIMILAR
POSITIONING, CHECK JOB PLANS CAREFULLY AND VERIFY MARKINGS
ON CURB ASSEMBLY
SUPERSEDES INFORMATION SHOWN
See the manual shipped with the roof curb for assembly and installation instructions.
. TO
AVOID INCORRECT CURB
. I
NSTRUCTIONS MAY VARY IN CURB STYLES AND
.
3. Lift unit per the “Rigging Details” section of this manual,
observing all warnings and cautions. When unit is lifted,
boards and shipping brace will drop if screws have been
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 e stablished guideline s of the National Roo fing 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 installing contractor. All required hardware necessary for the assembly of the sheet metal curb is included in the curb accessory.
WARNING
TO
PREVENT POSSIBLE EQUIPMENT DAMAGE, PROPERTY DAMAGE
PERSONAL INJURY OR DEATH, THE FOLLOWING BULLET POINTS MUST
BE OBSERVED WHEN INSTALLING THE UNIT
.
,
CLEARANCES
36”; minimum
roof overhang
65”
Min.*
48” Min
.
48”
Min.
*In situations that have multiple units, a 48” minimum clearance is
required between the condenser coils.
UNIT CLEARANCES
Adequate clearance ar ound the unit should be k ept for saf ety , service, maintenance, and proper unit operation. A total clearance
of 75” around this unit is recommended to f acilitate possible blower
assembly , shaft, wheel replacement, coil, heat exchanger, electric
heat and gas furnace removal. This unit must not be installed beneath any obstruction. This unit should be installed remote from
all building exhausts to inhibit ingestion of exhaust air into the
unit’s fresh air intake.
48”
Min.*
5
Insulated
Panels
Roof Curb Installation
ROOF CURB POST-INSTALLATION CHECKS
After installa tion, check the top of the curb, duct connection fr ame
and duct flanges to make sure gasket has been applied properly.
Gasket should be firmly applied to the top of the curb perimeter,
duct flanges and any exposed duct connection frame. If gasket is
loose, re-apply using strong weather resistant adhesive.
PROTRUSION
Inspect curb to ensure that none of the utility services (electric)
routed through the curb protrude above the curb.
CAUTION
CAUTION
DO
NOT LIFT UNITS TWO AT A TIME
BEEN INCLUDED IN THE UNIT BASE FRAME
72”
TO PREVENT DAMAGE TO THE UNIT
. P
ROVISIONS FOR FORKS HAVE
. M
INIMUM FORK LENGTH IS
.
Provisions for f orks ha ve been included in the unit base fr ame. No
other fork locations are approved.
WARNING
O PREVENT P OSSIBLE E QUIPMENT DAM AGE, PROPER TY DAMAGE, PERSONAL
T
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 t o 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 meta l ret ainer s and
pulling the struts through the base of the unit. Refer to
rigging label on the unit.
Important: If using bottom discharge with roof curb, ductwork
should be attached to the curb prior t o installing the unit. Ductwork
dimensions are shown in Roof Curb Installation Instructions.
Refer to the Roof Curb Installation Instructions for proper curb
installation. Curbing must be installed in compliance with the National Roofing Contractors Association Manual.
Lower unit carefully onto roof mounting curb. While rigging unit,
center of gravity will cause condenser end to be lower than supply
air end.
IF
PROTRUSIONS EXIST, DO NO ATTEMPT TO SET UNIT ON CURB
.
ROOF TOP DUCT CONNECTIONS
Install all duct connections on the unit before placing the unit on
rooftop.
RIGGING DET AILS
WARNING
O PREVENT PROPERTY DAMAGE, THE UNIT SHOULD REMAIN IN AN UPRIGHT
T
POSITION DURING ALL RIGGING AND MOVING OPERATIONS.
LIFTING AND MOVING WHEN A CRANE IS USED, PLACE THE UNIT IN AN
ADEQUATE CABLE SLING.
O FACILITATE
T
6
CAUTION
A
W
HEN UNIT IS SUSPENDED, BOARDS AND SHIPPING BRACE WILL DROP WHEN
SCREWS ARE REMOVED
R
EMOVE FORK HOLE BRACKETS, BOARDS AND SHIPPING BRACE FROM BOTTOM
UNIT BEFORE PLACING UNIT ONTO CURB
OF
. TO
PREVENT PERSONAL INJURY
, STAND CLEAR.
.
RIGGING REMOVAL
TO
PREVENT DAMAGE TO THE UNIT, DO NOT ALLOW CRANE HOOKS
AND SPREADER BARS TO REST ON THE ROOF OF THE UNIT
CAUTION
.
To assist in determining rigging requirements, unit weights are
shown as follows:
Y
COMPRESSOR 1
S
L
I
O
C
R
O
T
A
R
O
P
A
V
E
B
CG
COMPRESSOR 2
X
CORNER & CENTER OF GRAVITY LOCATIONS
DCC W eights
DATA
(lbs)
15 Tons 20 Tons 25 Tons
Corner Weight - A 590 644 626
Corner Weight - B 482 525 464
Corner Weight - C 492 504 501
Corner Weight - D 401 412 518
Un it Ship p in g Wei g ht 2080 2202 2377
Un it Opera ting Wei g ht 1965 2085 2109
X (Inches) 60" 58" 64.3"
Y (Inches) 40" 40" 41.3"
NOTE: These weights are without accessories installed.
CAUTION
TO
PREVENT SEVERE DAMAGE TO THE BOTTOM OF THE UNIT, DO NOT
FORK LIFT UNIT AFTER WOOD STRUTS HAVE BEEN REMOVED
.
Bring condenser end of unit into alignment with the curb. With
condenser end of the unit resting on curb member and using curb
as a fulcrum, lower opposite end of the unit until entire unit is
seated on the curb. When a rectangular cantilever curb is used,
care should be taken to center the unit. Check for proper alignment and orientation of supply and return openings with duct.
Remove spreader bar s, lifting cables and other rigging equipment.
ELECTRICAL WIRING
C
HIGH VOLTAGE!
D
ISCONNECT ALL POWER BEFORE SERVICING OR
INSTALLING THIS UNIT
BE PRESENT
DAMAGE, PERSONAL INJURY OR DEATH
. F
HIGH VOLTAGE!
O AVOID PERSONAL INJURY OR DEATH DUE TO
T
ELECTRICAL SHOCK, DO NOT TAMPER WITH FACTORY
WIRING
. THE
OF THESE UNITS ARE FACTORY-INSTALLED AND HAVE
BEEN THOROUGHLY TESTED PRIOR TO SHIPMENT
D
C
ONTACT YOUR LOCAL REPRESENTATIVE IF
ASSISTANCE IS REQUIRED
INTERNAL POWER AND CONTROL WIRING
. M
AILURE TO DO SO MAY CAUSE PROPERTY
WARNING
ULTIPLE POWER SOURCES MAY
.
WARNING
.
.
CAUTION
TO
PREVENT DAMAGE TO THE WIRING, PROTECT WIRING FROM
SHARP EDGES
LOCAL CODES AND ORDINANCES
REMOVABLE ACCESS PANELS
. F
OLLOW NATIONAL ELECTRICAL CODE AND ALL
. DO
NOT ROUTE WIRES THROUGH
.
CAUTION
C
ONDUIT AND FITTINGS MUST BE WEATHER-TIGHT TO PREVENT
WATER ENTRY INTO THE BUILDING
.
For unit protection, use a fuse or HACR circuit breaker that is in
excess of the circuit ampacity, but less than or equal to the maximum overcurrent protection device. DO NOT EXCEED THE MAXIMUM OVERCURRENT DEVICE SIZE SHOWN ON UNIT DATA PLATE.
All line voltage connections must be made through weatherproof
fittings. All exterior power supply and ground wiring must be in
approved weatherproof conduit.
The main power supply wiring to the unit and low voltage wiring
to accessory controls must be done in accordance with these instructions, the latest edition of the Na tional Electrical Code (ANSI/
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 main power supply shall be three-phase, three wir e. The unit
is factory wired for the voltage shown on the unit’s data plate.
7
NOTE: If supply voltage is 208V , all le ads on primary of tr ansformer
e
t
TRANS1 must be moved from the 230V to the 208V tap.
Main power wiring should be sized for the minimum wir e ampacity
shown on the unit’s data plate. Size wires in accordance with the
ampacity tables in Article 310 of the National Electrical Code. If
long wires are required, it may be necessary to increase the wire
size to prevent ex cessive vol tage drop. Wires should be sized for a
maximum of 3% voltage drop.
CAUTION
O AVOID PROPERTY DAMAGE OR PERSONAL INJURY DUE TO FIRE, USE
T
ONLY COPPER CONDUCTORS.
CAUTION
L
ABEL ALL WIRES PRIOR TO DISCONNECTION WHEN SERVICING
CONTROLS
DANGEROUS OPERATION
SERVICING
. W
IRING ERRORS CAN CAUSE IMPROPER AND
. V
ERIFY PROPER OPERATION AFTER
.
NOTE: A weather-tight disconnect switch, properly sized for the
unit total load, must be field or f actory installed. An e xternal field
supplied disconnect may be mounted on the exterior panel.
Ensure the data plate is not covered by the field-supplied
disconnect switch.
• Some disconnect switches are not fused. Protect the
power leads at the poin t of distribution in accordance with
the unit’s data plate.
• The unit must be electrically grounded in acc ordance with
local codes or, in the absence of local codes, with the late st
edition of the National Electrical Code (ANSI-NFPA 70). A
ground lug is provided for this purpose. Size grounding
conductor in accordance with T able 2 50-95 of the National
Electrical Code. Do not use the ground lug for connecting
a neutral conductor.
• Connect power wiring to the electrical middle contactor
within the main control box of power block, if equipped.
Line voltage connects
to middle contactor
on 460v and 575v
Gas Packs
(or power bloc k
if equipped)
Power Block
(Coolers &
230V Gas Packs
Only)
Line voltage connects
to power blo ck on
Coolers and the 230v
Gas Packs
Field wirin g enters
from this direction
POWER AND LOW VOLTAGE BLOCK LOCATIONS
Route field
control wiring
through
grommet
Ground
Lug
Low Voltage
Terminal Strip
Thermostat wiring
for all unit s
connect to low
voltage stri p
Fieldconnection
for
control wiring
at
terminal block
Field
connection
for
linevoltage
Field wiring
LOW
nters from
his direction
HIGH
Ground Lug
25 TON POWER AND LOW VOLTAGE BLOCK LOCATIONS
8
WARNING
A
F
AILURE OF UNIT DUE TO OPERATION ON IMPROPER LINE VOLTAGE
OR WITH EXCESSIVE PHASE UNBALANCE CONSTITUTES PRODUCT
ABUSE AND MAY CAUSE SEVERE DAMAGE TO THE UNIT ELECTRICAL
COMPONENTS
.
Areas Without Convenience Outlet
It is recommended that an independent 115V power source be
brought to the vicinity of the roof top unit for portable lights and
tools used by the service mechanic.
3. Use #18 AWG wire for 24V control wiring runs not
exceeding 75 fee t. Use #16 A WG wire f or 24V control wiring
runs not exceeding 125 feet. Use #14 AWG wire for 24V
control wiring runs not exceeding 200 feet. Low voltage
wiring may be National Electrical Code (NE C) 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 thermost at and
any accessory wiring to low voltage terminal block TB1 in
the main control box.
NOTE: Refer to local codes for requirements. These outlets can
also be factory installed.
UNITS INSTALLED ON ROOF TOPS
Main power and low voltage wiring may enter the unit through
the side or through the roof curb. Ins tall conduit connectors at the
desired entrance locations. External connectors must be weatherproof . All hole s in the unit base mus t be sealed (including those
around conduit nuts) to prevent water leakage into building. All
required conduit and fittings are to be field supplied.
Supply voltage to roof top unit must not vary by mor e than 10% of
the value indicated on the unit’s data plate. Phase voltage unbalance must not exceed 2%. Contact your local power comp any for
correction of improper voltage or phase unbalance.
NOTE: Field-supplied conduit may need t o be installed depending
on unit/curb configuration. Use #18 AWG solid conductor wire
whenever connecting thermostat wir es to terminals on sub-ba s e.
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.
CIRCULA TING AIR AND FILTERS
DUCTWORK
The supply duct from the unit through a wall may be ins talled without clearance. However, minimum unit clearances must be maintained (see “Clearances” section). The supply duct should be pr ovided 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.
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.
Thermostats may be pr ogrammable or electr omechanic al
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.
CONDENSATE DRAIN CONNECTION
CONDENSATE DRAIN CONNECTION
A 1” female NPT drain connection is supplied on the side of the
unit and a 1” male NPT on the bottom of the drain pan for condensate piping. An external tr ap must be ins talled f or proper c ondensate drainage.
UNIT 2" MINIMUM
FLEXIBLE
TUBING-HOSE
OR PIPE
POSITIVE LIQUID
SEAL IS REQUIRED
DRAIN CONNECTION
Install condensate drain trap as shown. Use 1" drain line and fit-
9
3" MINIMU M
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