Daikin DBG Series Installation Instructions Manual
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Daikin DBG Series Installation Instructions Manual

Light commercial packaged gas unit 6 ton
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DBG Series
Light Commercial Packaged Gas Unit
6 Ton
Installation Instructions
This forced air central unit design complies with
requirements embodied in The American National Standard
/ National Standard of Canada ANSI Z21.47•CSA-2.3 Gas-
fired central furnaces.
Our continuing commitment to quality products may mean a change in specifications without notice.
©2020
IOD-1048
03/2020
Only personnel that have been trained to install, adjust, service or
repair(hereinafter, "service") the equipment specified in this manual
should service the equipment. The manufacturer will not be responsible
for any injury or property damage arising from improper service or service
procedures. If you service this unit, you assume responsibility for any
injury or property damage which may result. In addition, in jurisdictions
that require one or more licenses to service the equipment specified in
this manual, only licensed personnel should service the equipment.
Improper installation, adjustment, servicing or repair of the equipment
specified in this manual, or attempting to install, adjust, service or repair
the equipment specified in this manual without proper training may result
in product damage, property damage, personal injury or death.
19001 Kermier Rd., Waller, TX 77484
www.daikincomfort.com
INSTALLATION INSTRUCTIONS
WARNING
PROP 65 WARNING
FOR CALIFORNIA CONSUMERS
WARNING
Cancer and Reproductive Harm -
www.P65Warnings.ca.gov
0140M00517-A

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  • Page 1 INSTALLATION INSTRUCTIONS DBG Series Light Commercial Packaged Gas Unit 6 Ton Installation Instructions WARNING Only personnel that have been trained to install, adjust, service or repair(hereinafter, “service”) the equipment specified in this manual should service the equipment. The manufacturer will not be responsible for any injury or property damage arising from improper service or service procedures.

  • Page 2: Table Of Contents

    Weights and Center of Gravity........8 Electrical wiring............8 EQUIPMENT SUPPORT gas supply piping............10 Daikin North America LLC propane gas installations...........12 19001 Kermier Road Circulating Air and Filters.........13 Waller, Texas 77484 Condensate Drain Connection........14 855-770-5678 Startup, Adjustments, and Checks......14...
  • Page 3 WARNING WARNING HIGH VOLTAGE! To prevent the risk of property damage, Disconnect all power before personal injury, or death, do not store servicing or installing this unit. combustible materials or use gasoline or other Multiple power sources may be flammable liquids or vapors in the vicinity of present.

  • Page 4: General Information

    Specification sheets can be found at unit. The model number shown on the unit’s identification www.daikinac.com for Daikin brand products. Within the plate identifies the various components of the unit such as website, please select the commercial products menu refrigeration tonnage, heating input and voltage.
  • Page 5 • Allow minimum clearances from the enclosure for fire protection, proper operation, and service access WARNING (see unit clearances). These clearances must be permanently maintained. To prevent possible equipment damage, property • The combustion air inlet and flue outlet on the unit damage, personal injury or death, the following must never be obstructed.

  • Page 6: Clearances

    • Do not skid or slide on any surface as this may See the manual shipped with the roof curb for assembly damage unit base. The unit must be stored on a flat, and installation instructions. level surface. Protect the condenser coil because it is easily damaged.

  • Page 7: Roof Curb Post-Installation Checks

    ROOF CURB POST-INSTALLATION CHECKS RIGGING DETAILS After installation, check the top of the curb, duct connection frame and duct flanges to make sure gasket has been WARNING applied properly. Gasket should be firmly applied to the top of the curb perimeter, duct flanges and any exposed duct connection frame.

  • Page 8: Weights And Center Of Gravity

    Refer to the Roof Curb Installation Instructions for proper Bring condenser end of unit into alignment with the curb curb installation. Curbing must be installed in compliance first. Lower unit carefully onto roof mounting curb. When a with the National Roofing Contractors Association Manual. rectangular cantilever curb is used, care should be taken to center the unit.
  • Page 9 For unit protection, use a fuse or HACR circuit breaker that • The unit must be electrically grounded in accordance is in excess of the circuit ampacity, but less than or equal with local codes or, in the absence of local codes, to the maximum overcurrent protection device.

  • Page 10: Gas Supply Piping

    Units installed on Roof Tops 4. Route thermostat wires from sub-base terminals Main power and low voltage wiring may enter the unit to the unit. Control wiring should enter through the through the condenser end of unit or through the roof curb. condenser panel opening or through curb indicated in Install conduit connectors at the desired entrance locations.
  • Page 11 4. Install a drip leg to trap dirt and moisture before it can INLET GAS PRESSURE enter the gas valve. The drip leg must be a minimum NATURAL Min. 5.0” W.C., Max. 10.0” W.C. of three inches long. PROPANE Min. 11.0” W.C., Max. 14.0” W.C. 5.

  • Page 12: Propane Gas Installations

    Gas Piping Checks IMPORTANT NOTE: Propane gas conversion kits must be installed to convert units to propane gas. NOx screens must be removed before converting CAUTION to LP. Remove burner assembly and pull NOx screens from each burner tube. When all the To prevent property damage or personal injury screens are out, reassemble the burner assembly due to fire, the following instructions must...

  • Page 13: Circulating Air And Filters

    A manual gas shut off valve must be field installed external to the roof top unit. In addition, a drip leg must be installed WARNING near the inlet connection. A ground joint union connection is required between the external shut off valve and the unit This unit and its individual shutoff valve must connection to the gas valve to permit removal of the burner be DISCONNECTED from the gas supply system...

  • Page 14: Condensate Drain Connection

    CONDENSATE DRAIN CONNECTION Pre-Startup Instructions - General Condensate Drain Connection CAUTION A 3/4” female NPT drain connection is supplied on the end of the unit and bottom of the drain pan for condensate To prevent property damage or personal injury, piping.

  • Page 15: Air Flow Adjustments

    Contractor Responsibility Utilization Voltage - The voltage of the line terminals The installing contractor must be certain that: of the equipment at which the equipment must give fully • All supply and return air ductwork is in place, properly satisfactory performance. Once it is established that supply sealed, and corresponds with installation instructions.

  • Page 16: Motor Sheve Adjustmnts

    motor and bearing failure will occur. Check you belt 5. Ensure all keys are in place and the set screws tight drive for adequate “run-in” belt tension by measuring the before starting drive. Recheck set screws and belt force required to deflect the belt at the midpoint of the tension after 24 hours service.
  • Page 17 Gas Supply Pressures & Regulator Adjustments IGNITION ELECTRODE FLAME SENSOR WARNING Should overheating occur or the gas supply fail to shut off, turn off the manual gas shutoff valve external to the unit before turning off the electrical supply. WARNING flame sensor and ignition electrode location To avoid property damage, personal injury or death, do not fire gas unit with flue box cover...
  • Page 18 3. INPUT=GAS HTG VALUE x 3600 / SEC. PER CUBIC INLET GAS PRESSURE FOOT NATURAL Min. 5.0” W.C., Max. 10.0” W.C. PROPANE Min. 11.0” W.C., Max. 13.0” W.C. Example: Natural gas with a heating value of 1000 BTU per cubic foot and 34 seconds per cubic foot as determined note: Inlet gas pressure must be within limits by Step 2, then: shown above.

  • Page 19: Normal Sequence Of Operation

    NORMAL SEQUENCE OF OPERATION 3. Turn on electrical power and gas supply to the system. Heating 4. Turn on system power and energize valve. NOTE: On units with the DDC controls option 5. Using a leak detection solution or soap suds, check installed, refer to the DDC Controller User for leaks at pressure boss screw.
  • Page 20 11. The furnace has three high temperature limit controls, To confirm charge levels or, if a leak occurs and charge which can shut down the burner. They do not shut needs to be added to the system, it is recommended to down the venter motor.

  • Page 21: Maintenance

    6. Check that the compressor is operating correctly. MAINTENANCE The scroll compressors in these units MUST operate WARNING in the proper rotation. To ensure the compressor is operating in the correct direction, check the compressor discharge line pressure or temperature ELECTRICAL SHOCK, FIRE OR EXPLOSION HAZARD after the compressor is started.
  • Page 22 5. Check power and control voltages. NOTE: After cleaning, the microamp signal should 6. Check running amperage. be stable and in the range of 4 - 6 microamps DC. 7. Check operating temperatures and pressures. 8. Check and adjust temperature and pressure controls. Flue Passages (Qualified Servicer Only) 9.

  • Page 23: Troubleshooting

    Abnormal Operation - Heating Codes External Lockout (1 FLASH CODE) An external lockout occurs if the integrated ignition control determines that a measurable combustion cannot be established within three (3) consecutive ignition attempts. If flame is not established within the seven (7) second trial for ignition, the gas valve is deenergized, 15 second inter- purge cycle is completed, and ignition is reattempted.
  • Page 24 IMPORTANT: If you have to frequently reset your times to indicate the compressor contactor output is being gas/electric package unit, it means that a problem delayed. exists that should be corrected. Contact a qualified servicer for further information. NOTE: Some electronic thermostats also have a built-in compressor short cycle timer that may be Pressure Switch Stuck Open (2 FLASH CODE)

  • Page 25: Appendix A Blower Performance Tables

    APPENDIX A BLOWER PERFORMANCE TABLES BELT DRIVE - HORIZONTAL DBG0723V STANDARD BELT DRIVE HORIZONTAL TURNS OPEN ESP, In H 2754 1245 1.62 2596 1180 1.37 2425 1110 1.13 2270 1045 0.94 2110 0.76 1949 0.61 2689 1245 1.57 2527 1180 1.32 2351 1110 1.09...
  • Page 26 APPENDIX A BLOWER PERFORMANCE TABLES BELT DRIVE - DOWNSHOT DBG0723V STANDARD BELT DRIVE DOWNSHOT TURNS OPEN ESP, In H 2732 1245 1.60 2570 1180 1.35 2394 1110 1.11 2236 1045 0.92 2073 0.75 1908 0.60 2665 1245 1.55 2499 1180 1.31 2319 1110 1.07...

  • Page 27: Appendix B Electrical Data

    APPENDIX B ELECTRICAL DATA Electrical Data Optional Powered Optional Electrical Compressor Outdoor Fan Motor Indoor Fan Motor Convienience Power Power Supply Model Number Rating Outlet Exhaust Type 30.0/30.0 45/45 2 speed Belt 9.6/8.7 39.6/38.7 50/50 DBG0723S 208/230/3/60 17.6 0.33 Drive 1.7/1.5 31.7/31.5 45/45...

  • Page 28: Appendix C Unit Dimensions

    APPENDIX C UNIT DIMENSIONS MODEL SIZE DIM “A” 6 TON GAS 43-1/2” Vertical Discharge Horizontal Discharge NOTE: Refer to IOD-7082 included in the literature pack for installing horizontal duct covers.

  • Page 29: Appendix D Min-Max Airflow

    APPENDIX D MIN-MAX AIRFLOW DATA RECOMMENDED MIN-MAX AIRFLOW RANGE HEATING COOLING HIGH FIRE RATE MAXIMUM UNIT MINIMUM MINIMUM BTU/HR SCFM SCFM SCFM 90,000 1500 DBG072 115,000 1550 1800 2700 140,000 1600...

  • Page 30: Wiring Diagrams

    HIGH VOLTAGE! DISCONNECT ALL POWER BEFORE SERVICING OR INSTALLING THIS UNIT. MULTIPLE POWER SOURCES MAY BE PRESENT. FAILURE TO DO SO MAY CAUSE PROPERTY DAMAGE, PERSONAL INJURY OR DEATH. Wiring is subject to change. Always refer to the wiring diagram on the unit for the most up-to-date wiring.
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  • Page 36 CUSTOMER FEEDBACK We are very interested in all product comments. Please fill out the feedback form on one of the following links: Daikin Products: (https://daikincomfort.com/contact-us) You can also scan the QR code on the right for the product brand you purchased DAIKIN to be directed to the feedback page.

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