Table of Contents
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DAX SERIES
COMMERCIAL AIR HANDLERS
Table of Contents
Important Safety Instructions ..........................................2
Product Identification .......................................................3
Product Description .........................................................3
Unit Inspection ..................................................................3
Codes & Regulations .......................................................3
Replacement Parts ...........................................................3
Pre-Installation Instructions ............................................4
Location .............................................................................4
Ductwork ...........................................................................4
Supply Ductwork and Flanges .....................................4
Return Ductwork ...........................................................4
Return Air Filters ...........................................................4
Electric Heat ......................................................................4
Electrical Supply Wire and MOP .....................................5
Building Electrical Service Inspection ......................5
Wire Sizing ...................................................................6
Maximum Overcurrent Protection (MOP) ..................6
Electrical Connections .....................................................7
Supply Voltage ..............................................................7
Air Handler Only (Non-Heat Kit Models) .....................7
Heater Kit Models ..........................................................7
Low Voltage Connections ............................................7
Heat Kit Installation ..........................................................7
Refrigerant Lines ..............................................................8
Tubing Preparation .......................................................8
Post Brazing ..................................................................8
Piping Size .....................................................................8
Multiple Condensers .....................................................8
Evaporator Coil TXV .........................................................9
Airflow ...............................................................................9
Regular Maintenance .......................................................9
Blower Performance Tables .....................................10-11
Wiring Diagram ...............................................................12
Splits Low Voltage Diagram ..........................................13
IMPORTANT NOTE: DAX models are suitable for
Upflow and Horizontal Installations only. do not
use for downflow Installations.
Do not bypass safety devices.
Our continuing commitment to quality products may mean a change in specifications without notice.
© 2022 - 2023
IOD-1056B
02/2023
WARNING
19001 Kermier Rd. Waller, TX 77484
www.daikincomfort.com
INSTALLATION INSTRUCTIONS
ONLY PERSONNEL THAT HAVE BEEN TRAINED TO INSTALL,
ADJUST, SERVICE, MAINTENANCE 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, MAINTENANCE 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.
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.
WARNING
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Summary of Contents for Daikin DAX Series
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Page 1: Table Of Contents
INSTALLATION INSTRUCTIONS DAX SERIES COMMERCIAL AIR HANDLERS Table of Contents Important Safety Instructions ..........2 Product Identification ............3 Product Description ............3 Unit Inspection ..............3 Codes & Regulations ............3 Replacement Parts ............3 Pre-Installation Instructions ..........4 Location ................4 Ductwork ................4 Supply Ductwork and Flanges ........4 Return Ductwork ............4... -
Page 2: Important Safety Instructions
Important Safety Instructions The following symbols and labels are used throughout this WARNING manual to indicate immediate or potential safety hazards. It is the owner’s and installer’s responsibility to read This airhandler is designed for Upflow or Horizontal- and comply with all safety information and instructions Left applications. -
Page 3: Product Identification
Installation in accordance with such codes and/or prevailing local codes/regulations is the The DAX series is intended for use with a room thermostat. responsibility of the installer. The manufacturer assumes This thermostat is not supplied with this equipment. Only... -
Page 4: Pre-Installation Instructions
Pre-Installation Instructions In order to ensure optimum system performance, it is recommended that the ductwork is to be sized to Carefully read all instructions for the installation prior to accommodate 375-425 CFM per ton of cooling with installing product. Make sure each step or procedure is the total external static pressure not to exceed .5”... -
Page 5: Electrical Supply Wire And Mop
The electrical characteristics of the airhandler, the electric DAX1204 Temperature Rise Table (°F) heat kit, and the building power supply must agree. DAX1204 Temperature Rise Table (°F) - 10Ton The air handlers listed in this manual do not have factory installed electric heat. -
Page 6: Wire Sizing
Building Electrical Service Inspection • Refer to the NEC (USA) or CSA (Canada) for wire This unit is designed for 3-phase operation. DO NOT sizing. The unit MCA for the air handler and the OPERATE ON A SINGLE PHASE POWER SUPPLY. SEE optional electric heat kit can be found on the unit THE PRECEDING WARNING. -
Page 7: Electrical Connections
Electrical Connections Supply Voltage USE COPPER CONDUCTORS ONLY. A single point supply voltage termination is provided in the airhandler control box (non-heat kit models) or heat kit control box (heat kit models). This termination is common to both the airhandler, and if equipped, heat kit. The wire is to be sized in accordance with the “Electrical Wire and MOP”... -
Page 8: Refrigerant Lines
of the airhandler. Do not screw the heat kit into the duct flanges. See the following drawing for details: On a 7 ½ ton DAX unit you can use either one 7 ½ ton condenser or two 4 ton condensers. On a 10 ton DAX unit you can use either one 10 ton condenser or two 5 ton condensers. -
Page 9: Evaporator Coil Txv
Regular Maintenance NOTE: The use of a heat shield when brazing is recommended to avoid burning the serial The only item to be maintained on a regular basis by the plate or the finish on the unit. Heat trap or wet user is the circulating air filter(s). -
Page 10: Blower Performance Tables
BLOWER PERFORMANCE TABLES 7.5 Ton LC Indoor Split System Models: DAX0904 UPFLOW HORIZONTAL SPEED SPEED SCFM SCFM (In H2O) (In H2O) 2124 0.06 2125 0.06 1635 0.06 1583 0.06 1445 0.07 1132 0.07 1270 0.08 0.07 1079 0.08 0.09 3069 0.21 3125 0.20... - Page 11 BLOWER PERFORMANCE TABLES 10 Ton LC Indoor Split System Models: DAX1204 UPFLOW HORIZONTAL SPEED SPEED SCFM SCFM (In H2O) (In H2O) 2527 0.17 2576 0.16 2396 0.18 2460 0.18 2239 0.19 2328 0.19 2086 0.20 2173 0.20 1936 0.21 2016 0.21 1804 0.22...
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Page 12: Wiring Diagram
WIRING DIAGRAM Wiring is subject to change. Always refer to the wiring diagram on the unit for the most up-to-date wiring. -
Page 13: Splits Low Voltage Diagram
SPLITS LOW VOLTAGE DIAGRAM Wiring is subject to change. Always refer to the wiring diagram on the unit for the most up-to-date wiring. - Page 14 THIS PAGE LEFT INTENTIONALLY BLANK...
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- Page 16 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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