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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