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Daikin DBC Series Installation Instructions Manual

15/20/25 ton light commercial packaged heating and cooling units
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DBC
SERIES
LIGHT COMMERCIAL PACKAGED HEATING AND COOLING UNIT
15 to 25 T
ON
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.
IOD-1039A
07/2020
Our continuing commitment to quality products may mean a change in specifications without notice.
©2018-2020
19001 Kermier Rd. Waller, Tx 77484
www.daikinac.com
INSTALLATION INSTRUCTIONS
O
NLY PERSONNEL THAT HAVE BEEN TRAINED TO INSTALL
(
, "
REPAIR
HEREINAFTER
SERVICE
SHOULD SERVICE THE EQUIPMENT
FOR ANY INJURY OR PROPERTY DAMAGE ARISING FROM IMPROPER SERVICE OR
. I
SERVICE PROCEDURES
F YOU SERVICE THIS UNIT
ANY INJURY OR PROPERTY DAMAGE WHICH MAY RESULT
JURISDICTIONS THAT REQUIRE ONE OR MORE LICENSES TO SERVICE THE EQUIPMENT
,
SPECIFIED IN THIS MANUAL
ONLY LICENSED PERSONNEL SHOULD SERVICE THE
. I
EQUIPMENT
MPROPER INSTALLATION
THE EQUIPMENT SPECIFIED IN THIS MANUAL
SERVICE OR REPAIR THE EQUIPMENT SPECIFIED IN THIS MANUAL WITHOUT PROPER
TRAINING MAY RESULT IN PRODUCT DAMAGE
.
INJURY OR DEATH
PROP 65 WARNING
FOR CALIFORNIA CONSUMERS
Cancer and Reproductive Harm
www.P65Warnings.ca.gov
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
Electrical Wiring ........................................................................ 7
Circulating Air and Filters ........................................................ 10
Condensate Drain Connection ................................................ 10
Startup, Adjustments, and Checks .......................................... 10
Airflow Adjustments ................................................................ 11
Motor Sheave Adjustments ..................................................... 12
Maintenance ............................................................................ 14
,
ADJUST
")
THE EQUIPMENT SPECIFIED IN THIS MANUAL
. T
HE MANUFACTURER WILL NOT BE RESPONSIBLE
,
YOU ASSUME RESPONSIBILITY FOR
. I
N ADDITION
,
,
ADJUSTMENT
SERVICING OR REPAIR OF
,
OR ATTEMPTING TO INSTALL
,
PROPERTY DAMAGE
-
Index
,
SERVICE OR
,
IN
,
,
ADJUST
,
PERSONAL
0140M00517-A

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  • Page 1: Table Of Contents

    INSTALLATION INSTRUCTIONS SERIES LIGHT COMMERCIAL PACKAGED HEATING AND COOLING UNIT 15 to 25 T NLY PERSONNEL THAT HAVE BEEN TRAINED TO INSTALL ADJUST SERVICE OR , “ ”) REPAIR HEREINAFTER SERVICE THE EQUIPMENT SPECIFIED IN THIS MANUAL SHOULD SERVICE THE EQUIPMENT HE MANUFACTURER WILL NOT BE RESPONSIBLE FOR ANY INJURY OR PROPERTY DAMAGE ARISING FROM IMPROPER SERVICE OR SERVICE PROCEDURES...

  • Page 2: Replacement Parts

    Specification sheets can be found at www.daikinac.com for Daikin brand products. Within the website, please select the residential or commercial products menu and then select the submenu for...

  • Page 3: Unit Location

    EPA R of each claim. The distributor or manufacturer will not EGULATIONS accept claims from dealers for transportation damage. (EPA) MPORTANT NITED TATES NVIRONMENTAL ROTECTION GENCY NOTE: When inspecting the unit for transportation damage, ISSUED VARIOUS REGULATIONS REGARDING THE INTRODUCTION AND DISPOSAL OF remove all packaging materials.
  • Page 4 • To avoid possible illness or death of the building occupants, NSTALLATIONS do NOT locate outside air intake device (economizer, Before installing this unit... manual fresh air intake, motorized fresh air intake) too close to an exhaust outlet, gas vent termination, or IMPORTANT NOTE: This unit has been equipped with a shipping plumbing vent outlet.

  • Page 5: Clearances

    4. Dispose of the boards and brace appropriately. CLEARANCES 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.

  • Page 6: Roof Curb Post-Installation Checks

    ROOF CURB POST-INSTALLATION CHECKS Important: If using bottom discharge with roof curb, ductwork should be attached to the curb prior to installing the unit. Ductwork After installation, check the top of the curb, duct connection frame dimensions are shown in Roof Curb Installation Instructions. and duct flanges to make sure gasket has been applied properly.

  • Page 7: Electrical Wiring

    DBC Weights CAUTION (lbs) DATA 15 Tons 20 Tons 25 Tons O PREVENT DAMAGE TO THE WIRING PROTECT WIRING FROM SHARP EDGES OLLOW NATIONAL ELECTRICAL CODE AND ALL LOCAL CODES AND ORDINANCES O NOT ROUTE WIRES THROUGH Corner Wei ght - A REMOVABLE ACCESS PANELS Corner Wei ght - B CAUTION...
  • Page 8 • Some disconnect switches are not fused. Protect the Field connection Route field power leads at the point of distribution in accordance with control wiring control wiring the unit’s data plate. through • The unit must be electrically grounded in accordance with grommet terminal block local codes or, in the absence of local codes, with the latest...
  • Page 9 ELECTRICAL ENTRANCE LOCATIONS Unit is equipped with Single Point Power Block and Low Voltage Block. OLTAGE ONTROL IRING NOTE: For models equipped with the DDC controls option, refer to the supplemental DDC literature supplied with the unit for 25 TON DDC POWER AND LOW VOLTAGE TERMINAL LOCATIONS additional information.

  • Page 10: Circulating Air And Filters

    CIRCULATING AIR AND FILTERS ORIZONTAL RAIN Drainage of condensate directly onto the roof may be acceptable; UCTWORK refer to local code. It is recommended that a small drip pad of The supply duct from the unit through a wall may be installed either stone, mortar, wood or metal be provided to prevent any without clearance.

  • Page 11: Airflow Adjustments

    The Startup, Adjustments, and Checks procedure provides a step- STARTUP RECAUTIONS by-step sequence which, if followed, will assure the proper startup It is important to your safety that the unit has been properly of the equipment in the minimum amount of time. Air balancing grounded during installation.

  • Page 12: Motor Sheave Adjustments

    NOTE: Airflow setting below 300 CFM/ton is not recommended, as evaporator freezing or poor unit performance is possible. For 2-speed models, airflow adjustments must be made with the evaporator fan motor operating at high speed (in 2nd stage cooling or in heat mode). VAPORATOR Actual RPM’s must be set and verified with a tachometer or strobe light.
  • Page 13 3. Turn on the electrical supply at the disconnect. NOTE: Future adjustments should be made by loosening the belt tension and increasing or decreasing the pitch diameter of the 4. Turn the fan switch to the “ON” position. The blower should sheave by half or full turns as required.

  • Page 14: Maintenance

    11. Check and adjust damper linkages. INAL YSTEM HECKS 12. Check operation of all safety controls. 10. Check to see if all supply and return air grilles are adjusted 13. Examine gas furnaces (see below and the User’s and the air distribution system is balanced for the best Information Manual).
  • Page 15 APPENDIX A BLOWER PERFORMANCE DATA BELT DRIVE - STANDARD DCB180 STANDARD TWO-SPEED BELT DRIVE AT HIGH SPEED TURNS OPEN ESP, In H 7203 2.18 6718 1.94 7306 2.54 6777 2.14 6257 1.80 5711 1.66 7477 2.97 6899 2.51 6323 2.10 5716 1.72 5103...
  • Page 16 APPENDIX A BLOWER PERFORMANCE DATA BELT DRIVE - HIGH STATIC DBC180 HIGH STATIC BELT DRIVE - 2 SPEED AT HIGH SPEED TURNS OPEN (In W.C.) 6580 4.30 6930 6432 5908 5.14 4.53 3.98 6866 6382 5916 5370 5.52 4.80 4.24 3.68 6779 6417...
  • Page 17 APPENDIX A ECONOMIZER PRESSURE DROP Airflow Pressure Drop of Downflow Economizer for 15 to 25 Ton Rooftop Units (100% Return Air) SCFM 4500 5000 5500 6000 6500 7000 7500 8000 8500 9000 9500 10000 (In WG) 0.15 0.18 0.22 0.27 0.32 0.37 0.42...
  • Page 18 APPENDIX B ELECTRICAL DATA Compressor Outdoor Fan Motor Indoor Fan Motor Optional Electric Heat Optional Powered Convienience Outlet Power Supply Model Number Electrical Rating QTY RLA LRA Type HP FLA Part # 82.5/82.5 100/100 7.2/6.5 89.7/89.0 110/110 speed 100/112 110/125 EHK3-31 21.6/28.8 60.0/69.3 Belt 7.2/6.5...
  • Page 19 APPENDIX B ELECTRICAL DATA Compressor Outdoor Fan Motor Indoor Fan Motor Optional Electric Heat Optional Powered Convienience Outlet Power Supply Model Number Electrical Rating QTY RLA LRA Type HP FLA Part # 103/103 125/125 7.2/6.5 110/109 125/125 103/112 125/125 EHK3-31 21.6/28.8 60.0/69.3 speed 7.2/6.5...
  • Page 20 APPENDIX B ELECTRICAL DATA Compressor Outdoor Fan Motor Indoor Fan Motor Optional Electric Heat Optional Powered Convienience Outlet Power Supply Model Number Electrical Rating QTY RLA LRA Type HP FLA Part # 138/138 175/175 7.2/6.5 145/144 175/175 138/138 175/175 EHK3-31 21.6/28.8 60.0/69.3 speed 7.2/6.5...
  • Page 21 APPENDIX C UNIT DIMENSIONS Model 15 Ton 88-7/32" 50-9/32" 5-5/32" 133-1/2" 20 Ton 25 Ton 133-1/2" 88-7/32" 53-9/32" 5-5/32" NOTE: 15 & 20 ton models have 3 fans. 25 ton models have 2 fans. 21” 60” 7” 48” 22” VERTICAL DISCHARGE (TOP VIEW)
  • Page 22 APPENDIX D WIRING DIAGRAMS...
  • Page 23 WIRING DIAGRAMS DBC180*/DBC240* 208-230, 460, 575 / 3 / 60 2 SPEED Wiring is subject to change. Always refer to the wiring diagram on the unit for the most up-to-date wiring.
  • Page 24 WIRING DIAGRAMS DBC180*/DBC240* 208-230, 460, 575 / 3 / 60 2 SPEED Wiring is subject to change. Always refer to the wiring diagram on the unit for the most up-to-date wiring.
  • Page 25 DBC300* 208-230, 460, 575 / 3 / 60 2 SPEED WIRING DIAGRAMS Wiring is subject to change. Always refer to the wiring diagram on the unit for the most up-to-date wiring.
  • Page 26 WIRING DIAGRAMS DBC300* 208-230, 460, 575 / 3 / 60 2 SPEED Wiring is subject to change. Always refer to the wiring diagram on the unit for the most up-to-date wiring.
  • Page 27 DBC180*/DBC240* 208-230, 460, 575/3/60 2 SPEED DDC CONTROLS WIRING DIAGRAMS Wiring is subject to change. Always refer to the wiring diagram on the unit for the most up-to-date wiring.
  • Page 28 WIRING DIAGRAMS DBC180*/DBC240* 208-230, 460, 575/3/60 2 SPEED DDC CONTROLS Wiring is subject to change. Always refer to the wiring diagram on the unit for the most up-to-date wiring.
  • Page 29 DBC300* 208-230, 460, 575/3/60 2 SPEED DDC CONTROLS WIRING DIAGRAMS Wiring is subject to change. Always refer to the wiring diagram on the unit for the most up-to-date wiring.
  • Page 30 WIRING DIAGRAMS DBC300* 208-230, 460, 575/3/60 2 SPEED DDC CONTROLS Wiring is subject to change. Always refer to the wiring diagram on the unit for the most up-to-date wiring.
  • Page 31 Start-up Checklist *Store in job file Date: ___________________________________ Location: __________________________________________ Model Number: ___________________________________ __________________________________________ Serial Number: ___________________________________ __________________________________________ Technician: ___________________________________ Unit #: __________________________________________ Pre Start-Up (Check each item as completed) Verify all packaging material has been removed. Remove all shipping brackets per installation instructions. Verify the job site voltage agrees with the unit serial plate.
  • Page 32 Start-up Checklist Start-Up (Insert the values as each item is completed.) ELECTRICAL Supply Voltage L1 - L2 L2 - L3 L3 - L1 Circuit 1 Compressor Amps Circuit 2 Compressor Amps Blower Amps Condenser Fan Amps Fan 1 Fan 2 Fan 3 BLOWER EXTERNAL STATIC PRESSURE Return Air Static Pressure...
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  • Page 36 CUSTOMER FEEDBACK Daikin is very interested in all product comments. Please fill out the feedback form on the following link: https://daikincomfort.com/contact-us You can also scan the QR code on the right to be directed to the Feedback page. Our continuing commitment to quality products may mean a change in specifications without notice.

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