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Daikin DBG Series General Information Manual

Light commercial packaged gas unit
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DBG
SERIES
LIGHT COMMERCIAL PACKAGED GAS 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.
This Forced Air Central Unit Design Complies With Requirements
Embodied in the American National Standard / National Standard
of Canada shown below.
ANSI Z21.47•CSA-2.3 Central Furnaces
IOD-1041
07/2019
Our continuing commitment to quality products may mean a change in specifications without notice.
©2019
5151 San Felipe St., Suite 500, Houston, TX 77056
www.daikinac.com
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
FOR 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
www.P65Warnings.ca.gov
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 .......................................................................6
Electrical Wiring ....................................................................8
Gas Supply Piping ................................................................10
Propane Gas Installations ....................................................12
Circulating Air and Filters .....................................................13
Venting ................................................................................13
,
,
ADJUST
SERVICE OR
THE EQUIPMENT SPECIFIED IN THIS MANUAL
. T
HE MANUFACTURER WILL NOT BE RESPONSIBLE
,
YOU ASSUME RESPONSIBILITY
. I
N ADDITION
,
,
ADJUSTMENT
SERVICING OR REPAIR OF
,
OR ATTEMPTING TO INSTALL
,
,
PROPERTY DAMAGE
PERSONAL
WARN ING
-
Index
,
IN
,
,
ADJUST
0140M00517-A

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  • Page 1: Table Of Contents

    SERIES LIGHT COMMERCIAL PACKAGED GAS 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 F YOU SERVICE THIS UNIT...

  • Page 2: Replacement Parts

    Your nearest distributor SUCH NON APPROVED DEVICES can be located online at www.daikinac.com or by contacting: EQUIPMENT SUPPORT WARNING DAIKIN NORTH AMERICA LLC “ ” 19001 KERMIER ROAD HIS UNIT MUST NOT BE USED AS A CONSTRUCTION HEATER...

  • Page 3: General Information

    Specification sheets can be 2. Notify carrier promptly and request an inspection. found at www.daikinac.com for Daikin brand products. Within the 3. In case of concealed damage, carrier should be notified as soon as possible-preferably within 5 days.

  • Page 4: Unit Location

    • d. Copy of the inspection report issued by carrier To avoid possible corrosion of the heat exchanger, do representative at the time damage is reported to the not locate the unit in an area where the outdoor air (i.e. carrier.
  • Page 5 • Adequate clearances from the furnace flue discharge to any adjacent public walkways, adjacent buildings, building openings or openable windows must be maintained in accordance with the latest edition of the National Fuel Gas LIFT OVER APPROXIMATE CENTER OF UNIT Code (ANSI Z223.1) SPREADER BARS MUST BE USED WITH...

  • Page 6: Clearances

    • 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 to be assembled with the curb.

  • Page 7: Rigging Details

    RIGGING DETAILS WARNING O PREVENT PROPERTY DAMAGE THE UNIT SHOULD REMAIN IN AN UPRIGHT POSITION DURING ALL RIGGING AND MOVING OPERATIONS O FACILITATE LIFTING AND MOVING WHEN A CRANE IS USED PLACE THE UNIT IN AN ADEQUATE CABLE SLING CAUTION O NOT LIFT UNITS TWO AT A TIME ROVISIONS FOR FORKS HAVE BEEN 72”...

  • Page 8: Electrical Wiring

    WARNING DBG Weights HIGH VOLTAGE ! (lbs) DATA O AVOID PERSONAL INJURY OR DEATH DUE TO ELECTRICAL SHOCK DO NOT TAMPER WITH FACTORY WIRING 15 Tons 20 Tons 25 Tons INTERNAL POWER AND CONTROL WIRING OF THESE UNITS ARE FACTORY INSTALLED AND HAVE BEEN THOROUGHLY Corner Weight - A TESTED PRIOR TO SHIPMENT...
  • Page 9 NOTE: A weather-tight disconnect switch, properly sized for the control wiring unit total load, must be field or factory installed. An external field control wiring through supplied disconnect may be mounted on the exterior panel. grommet Ensure the data plate is not covered by the field-supplied disconnect switch.

  • Page 10: Gas Supply Piping

    GAS SUPPLY PIPING WARNING O PREVENT PERSONAL INJURY OR DEATH DUE TO IMPROPER INSTALLATION ADJUSTMENT ALTERATION SERVICE OR MAINTENANCE REFER TO THIS MANUAL OR ADDITIONAL ASSISTANCE OR INFORMATION CONSULT A QUALIFIED INSTALLER SERVICE AGENCY OR THE GAS SUPPLIER IMPORTANT NOTE: This unit is factory set to operate on natural gas at the altitudes shown on the rating plate.
  • Page 11 Natural Gas Connection GAS INLET LOCATION (3/4” NPT) Natural Gas Capacity of Pipe in Cubic Feet of Gas Per Hour (CFH) Length of Nominal Black Pipe Size (inches) Pipe in Feet 1 1/4 1 1 /2 1050 1600 1100 46-1/10” 46-1/10”...

  • Page 12: Propane Gas Installations

    Gas Piping Checks 2. Proper pressure regulation. 3. Pressure drop in lines between regulators, and between CAUTION second stage regulator and the appliance. Pipe size required will depend on length of pipe run and total load O PREVENT PROPERTY DAMAGE OR PERSONAL INJURY DUE TO FIRE of all appliances.

  • Page 13: Circulating Air And Filters

    3. These units are designed for either natural or propane Ductwork dimensions are shown in the roof curb installation (LP) gas and are specifically constructed at the factory for manual. only one of these fuels. The fuels are NOT interchangeable. If desired, supply and return duct connections to the unit may be However, the furnace can be converted in the field from made with flexible connections to reduce possible unit operating...
  • Page 14 STARTUP, ADJUSTMENTS, AND CHECKS Contractor Responsibility The installing contractor must be certain that: WARNING • All supply and return air ductwork is in place, properly HIGH VOLTAGE! sealed, and corresponds with installation instructions. O AVOID PERSONAL INJURY OR DEATH DUE TO •...
  • Page 15 Set Evaporator Fan Rpm and calculate if an unbalanced condition exists between phases. Calculate percent voltage unbalance as follows: Actual RPM’s must be set and verified with a tachometer or strobe light. Refer to Appendices A and B for basic unit fan RPM. Refer Three Phase Models also to “Airflow”...
  • Page 16 NOTE: Do not operate sheave with flange projecting beyond the SHEAVE DEFLECTION DEFLECTION hub end. MODEL TYPE DIAMETER FORCE (lbs) (in) (in) GAS SYSTEM CHECK BELT DRIVE Used 15 Ton B, BA Standard 4.3 to 5.5 5.5 + .5 8.2 + .5 1/4 ±...
  • Page 17 provided on the upstream side of the gas valve. A manifold pressure With Power And Gas Off: tap is provided on the manifold. The normal manifold pressure for 1. Connect a water manometer or adequate gauge to the full input is 3.5” w.c. on natural gas and 10.0” w.c. for propane gas. inlet pressure tap of the gas valve.
  • Page 18 3. INPUT=GAS HTG VALUE x 3600 / SEC. PER CUBIC FOOT TO REMOVE MANOMETER FROM GAS VALVE: Example: Natural gas with a heating value of 1000 BTU per cubic 1. Remove manometer hose from outlet pressure boss. foot and 34 seconds per cubic foot as determined by Step 2, then: 2.
  • Page 19 in the “HEAT” or “AUTO” position and the fan switch the electrical power. in the “AUTO” position, the thermostat will close the Automatic Reset High Limit Control (LS) circuit between unit terminals R and W (R-W) when the temperature falls below the thermostat setting. Located in the burner compartment on the heat exchanger, its sensing element projects through the blower section bulkhead and 2.
  • Page 20 Start-Up Procedure and Checklist NORMAL SEQUENCE OF OPERATION - COOLING Begin with power turned off at all disconnects. Refrigeration Sequence Check With the disconnect switch open, remove the field connected ther- 1. Turn thermostat system switch to “Cool,” and fan switch to mostat wire from terminal R on TB1 terminal block.
  • Page 21 8. With all safety devices closed, the system will continue 2. Clean evaporator and condenser coils mechanically or with cooling operation until the thermostat is satisfied. cold water, if necessary. Usually any fouling is only matted on the entering air face of the coil and can be removed by 9.
  • Page 22 Clean Outside Coil (Qualified Servicer Only) BURNER FLAME The coil with the outside air flowing over it should be inspected WARNING annually and cleaned as frequently as necessary to keep the finned areas free of lint, hair and debris. O AVOID PERSONAL INJURY OR DEATH DUE TO ELECTRIC SHOCK NOT REMOVE ANY INTERNAL COMPARTMENT COVERS OR ATTEMPT ANY Flame Sensor (Qualified Servicer Only) ADJUSTMENT...
  • Page 23 The diagnostic fault code is 1 flash for a lockout due to failed Open Thermal Protection Device (4 FLASH CODE) ignition attempts or flame dropouts. The integrated control will If the primary limit switch opens, the gas valve is immediately automatically reset after one hour, or it can be reset by removing deenergized, the induced draft and air circulating blowers are the thermostat signal or disconnecting the electrical power supply...
  • Page 24 APPENDIX A BLOWER PERFORMANCE DATA BELT DRIVE - STANDARD DBG180 STANDARD TWO-SPEED BELT DRIVE TURNS OPEN ESP, In H 0.00 6827 2.67 6394 2.28 5982 1.94 7079 3.20 6623 2.76 6161 2.34 5706 1.98 5271 1.66 6903 3.32 6405 2.83 5923 2.41 5434...
  • Page 25 APPENDIX A BLOWER PERFORMANCE DATA BELT DRIVE - HIGH STATIC DBG180 HIGH STATIC DOWNSHOT TWO SPEED MODELS TURNS OPEN (In. W.C.) 6678 4.61 6266 4.10 6600 4.90 6126 4.32 5626 3.79 6840 5.80 6540 5.25 6078 4.58 5634 4.03 5115 3.51 6739 5.99 6457...
  • Page 26 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 27 APPENDIX B ELECTRICAL DATA Compressor Compressor Optional Powered Electrical Outdoor Fan Motor Indoor Fan Motor Power Supply Circuit 1 Circuit 2 Convienience Outlet Model Number Rating Type 82.6 / 82.6 100 / 100 2-Speed High DCG1803W 208/230-3-60 25.0 164.0 25.0 164.0 0.33 7.50...
  • Page 28 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 29 APPENDIX D WIRING DIAGRAMS...
  • Page 30 WIRING DIAGRAMS DBG180*/ DBG240* 208-230/ 3 / 60 2 SPEED CCH1 CCHR1 COMP CCH2 CCHR2 POWER SUPPLY SEE NOTE 4 208V / 240V - 3 ph - 60Hz COMP GRND GRND HIGH SPEED HIGH SPEED CCR1 CCR2 UNUSED UNUSED HEAT HEAT COOL COOL...
  • Page 31 WIRING DIAGRAMS DBG180*/ DBG240* 208-230/ 3 / 60 2 SPEED SUPPLY VOLTAGE 208-240/3/60 5. FOR TWO STAGE OPERATION REMOVE W1 TO W2 WIRE JUMPER. HPS2 LPS2 ECON STATUS LIGHT EQUIPMENT STATUS CHECK ------ NORMAL OPERATION CHECK INPUT POWER NO POWER OR CHECK FUSE ON CONTROL INTERNAL CONTROL REPLACE CONTROL...
  • Page 32 WIRING DIAGRAMS DBG180*/ DBG240* 460, 575/ 3 / 60 2 SPEED CCH1 CCHR1 COMP CCH2 CCHR2 POWER SUPPLY SEE NOTE 4 460V / 575V - 3 ph - 60Hz COMP GRND GRND HIGH SPEED HIGH SPEED OR APPROPRIATE INPUT VOLTAGE CCR1 CCR2 UNUSED...
  • Page 33 WIRING DIAGRAMS DBG180* / DBG240* 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 34 WIRING DIAGRAMS DBG300* 208-230/ 3 / 60 2 SPEED POWER DIAGRAM IIC DIAGNOSTIC BLINK CODES STATUS LIGHT EQUIPMENT STATUS CHECK NORMAL OPERATION ------- CHECK INPUT POWER NO POWER OR CHECK FUSE ON CONTROL INTERNAL CONTROL LINE VOLTAGE REPLACE CONTROL GAS FLOW GAS PRESSURE IGNITION FAILURE GAS VALVE...
  • Page 35 WIRING DIAGRAMS DBG300* 460, 575/ 3 / 60 2 SPEED POWER DIAGRAM IIC DIAGNOSTIC BLINK CODES STATUS LIGHT EQUIPMENT STATUS CHECK ------- NORMAL OPERATION CHECK INPUT POWER NO POWER OR CHECK FUSE ON CONTROL INTERNAL CONTROL LINE VOLTAGE REPLACE CONTROL GAS FLOW GAS PRESSURE GAS VALVE...
  • Page 36 DBG300* 208-230, 460, 575/ 3 / 60 2 SPEED WIRING DIAGRAMS FIELD THERMOSTAT WIRING SMOKE DETECTOR CONTROL 2 STAGE COOLING WIRING CLASS 2 SEN1 SENSOR 1 AUX A SUPPLY (LINE) VOLTAGE SENSOR 2 SEN2 AUX B 24 VAC SMK DET STAT OPTION CCR1...
  • Page 37 Start-up Checklist Date: ___________________________________ Model Number: ___________________________________ __________________________________________ Serial Number: ___________________________________ __________________________________________ Technician: ___________________________________ Unit #: __________________________________________ Pre Start-Up (Check each item as completed) Verify all packaging material has been removed. Verify the job site voltage agrees with the unit serial plate. Check gas piping for leaks.
  • Page 38 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...
  • Page 39 THIS PAGE INTENTIONALLY LEFT BLANK...
  • Page 40 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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