IO-4005
08/2022
CONTENTS
1 Important Safety Instructions
.............................Pg. 1
2 Shipping Inspection
...........................................Pg. 2
3 Codes & Regulations
..........................................Pg. 2
4 Replacement Parts
..............................................Pg. 2
5 Pre- Installation Instructions
..............................Pg. 2
5.1 Preparation ......................................................Pg. 2
5.2 System Matches ..............................................Pg. 2
5.3 Interconnecting Tubing ....................................Pg. 3
6 Application Information
......................................Pg. 3
6.1 Wire Sizing ......................................................Pg. 3
6.2 Maximum Overcurrent Protection (MOP) ........Pg. 4
6.3 Electrical Connections-Supply Voltage ............Pg. 4
6.4 Fresh Air Openings .........................................Pg. 4
7 AWST-Factory Installed TXV Models
................Pg. 4
7.1 Tubing Size .....................................................Pg. 4
7.2 Tubing Connection ..........................................Pg. 4
7.3 Thermal Expansion Valve System Adjustment Pg. 5
8 Maintenance Check
............................................Pg. 5
9 Wiring Diagrams and Air Flow Data
...................Pg. 6
9.1 Low Voltage Connection .................................Pg. 6
10 Trouble Shooting
..............................................Pg. 11
VERTICAL MOUNT AIR HANDLERS
INSTALLATION INSTRUCTIONS & OPERATING INSTRUCTIONS
© 2022
19001 Kermier Rd., Waller, TX 77484
www.daikinac.com
P/N: IO-4005 Date: August 2022
WARNING
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.
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.
WARNING
WARNING
TO PREVENT THE RISK OF PROPERTY DAMAGE, PERSONAL
INJURY, OR DEATH, DO NOT STORE COMBUSTIBLE MATERI
-
ALS OR USE GASOLINE OR OTHER FLAMABLE LIQUIDS OR
VAPORS IN THE VICINITY OF THIS APPLIANCE.
CAUTION
HAVE YOUR CONTRACTOR IDENTIFY ALL THE VARIOUS CUT
OFF SWITCHESAND DEVICES THAT SERVICE THIS UNIT.
KNOW WHERE THE SWITCH IS THAT WILL CUT OFF ENERGY
TO THE HEATING SYSTEM IN THE EVENT OF OVERHEATING.
CAUTION
THIS APPLIANCE IS NOT INTENDED FOR THE USE BY PER-
SONS (INCLUDING CHILDREN) WITH THE REDUCED PHYSICAL,
SENSORY OR MENTAL CAPABILITIES, OR LACK OF EXPERI
-
ENCE AND KNOWLEDGE, UNLESS THEY HAVE BEEN GIVEN
SUPERVISION OR INSTRUCTION CONCERNING USE OF THE
APPLIANCE BY A PERSON RESPONSIBLE FOR THEIR SAFETY.
CHILDREN SHOULD BE SUPERVISED TO ENSURE THAT THEY
DO NOT PLAY WITH THE APPLIANCE.
WARNING
THIS UNIT SHOULD NOT BE CONNECTED TO, OR USED IN
CONJUNCTION WITH, ANY DEVICES THAT ARE NOT DESIGN
CERTIFIED FOR USE WITH THIS UNIT OR HAVE NOT BEEN
TESTED AND APPROVED BY THE MANUFACTURER. SERIOUS
PROPERTY DAMAGE OR PERSONAL INJURY, REDUCED UNIT
PERFORMANCE AND/OR HAZARDOUS CONDITIONS MAY
RESULT FROM THE USE OF DEVICES THAT HAVE NOT BEEN
APPROVED OR CERTIFIED BY THE MANUFACTURER.
1 Important Safety Instructions
As a professional installer, you have an obligation to know
the product better than the customer. This includes all safety
precautions and related items. Prior to actual installation,
thoroughly familiarize yourself with this Instruction Manual.
Pay special attention to all safety warnings. Remember, it is
your responsibility to install the product safely and to know it
well enough to be able to instruct a customer in its safe use.
Safety is a matter of common sense...a matter of thinking before
acting. Most dealers have a list of specific, good safety
practices...follow them.
The precautions listed in this Installation Manual are in- tended
as supplemental to existing practices. However, if there is a
direct conflict between existing practices and the content
of this manual, the precautions listed here take precedence.
