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THREE PHASE 

CONDENSING UNIT

 

AIR CONDITIONING 

Installation & Service Reference

IMPORTANT SAFETY INSTRUCTIONS

The following symbols and labels are used throughout this 

manual to indicate immediate or potential safety hazards. 

It is the owner’s and installer’s responsibility to read 

and comply with all safety information and instructions 

accompanying these symbols. Failure to heed safety 

information increases the risk of personal injury, property 

damage, and/or product damage.

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.

WARNING

Do not bypass safety devices.

WARNING

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. 

SHIPPING INSPECTION

Always keep the unit upright; laying the unit on its side 

or top may cause equipment damage. Shipping damage, 

and subsequent investigation is the responsibility of 

the carrier. Verify the model number, specifications, 

electrical characteristics, and accessories are correct 

prior to installation. The distributor or manufacturer will not 

accept claims from dealers for transportation damage or 

installation of incorrectly shipped units.  

CODES & REGULATIONS

This product is designed and manufactured to comply 

with national codes. Installation in accordance with such 

codes and/or prevailing local codes/regulations is the 

responsibility of the installer. The manufacturer assumes 

no responsibility for equipment installed in violation of any 

codes or regulations. Rated performance is achieved after 

20 hours of operation.

Rated performance is delivered at the specified airflow. 

See outdoor unit specification sheet for split system models 

or product specification sheet for packaged and light 

commercial models. Specification sheets can be found at 

www.daikincomfort.com for Daikin. Within either website, 

please select the residential or commercial products menu 

and then select the submenu for the type of product to be 

installed, such as air conditioners or heat pumps, to access 

a list of product pages that each contain links to that 

model’s specification sheet.

The United States Environmental Protection Agency 

(EPA) has issued various regulations regarding the 

introduction and disposal of refrigerants. Failure to 

follow these regulations may harm the environment 

and can lead to the imposition of substantial fines.

 

Should you have any questions please contact the local 

office of the EPA.

If replacing a condensing unit or air handler, the system 

must be manufacturer approved and Air Conditioning, 

Heating and Refrigeration Institute (AHRI) matched. 

 

NOTE: Installation of unmatched systems is 

strongly discouraged.

INSTALLATION INSTRUCTIONS

IOD-4046A

03/2023

Our continuing commitment to quality products may mean a change in specifications without notice. 

© 2023 

19001 Kermier Rd. Waller, TX 77484

www.daikincomfort.com

Summary of Contents for DX3SEA

Page 1: ...ty of the carrier Verify the model number specifications electrical characteristics and accessories are correct prior to installation The distributor or manufacturer will not accept claims from dealer...

Page 2: ...on Ensure the foundation is sufficient to support the unit A concrete slab raised above ground level provides a suitable base ROOFTOP INSTALLATIONS If it is necessary to install this unit on a roof st...

Page 3: ...igid wire or straps that would come in contact with the tubing Use an insulated or suspension type hanger Keep both lines separate and always insulate the suction line These sizes are recommended for...

Page 4: ...the formation of copper oxide inside the refrigerant lines The POE oils used in R 410A applications will clean any copper oxide present from the inside of the refrigerant lines and spread it througho...

Page 5: ...vacuate the system to less than 500 microns 3 Isolate the pump from the system and hold vacuum for 10 minutes minimum Typically pressure will rise slowly during this period If the pressure rises to le...

Page 6: ...following overcurrent protection devices are approved for use Time delay fuses HACR type circuit breakers These devices have sufficient time delay to permit the motor compressor to start and accelerat...

Page 7: ...eaks Make sure cap is clean and apply refrigerant oil to threads and sealing surface on inside of cap Tighten cap finger tight and then tighten additional 1 6 of a turn 1 wrench flat or to the followi...

Page 8: ...and refrigerant tubing sizes or poor performance should Superheat setting require adjustment These adjustments should only be performed by qualified service personnel For detailed charge and TXV adju...

Page 9: ...0 13 15 19 23 24 25 6 9 11 15 20 21 23 7 12 17 18 20 8 13 15 16 7 10 11 13 7 8 10 7 8 7 105 110 115 75 80 85 90 95 100 System Superheat Targets for Piston Match ups 1 0 F Indoor Wet Bulb Temperature F...

Page 10: ...D SUCTION PRESSURE TEMPERATURE CHART LIQUID PRESSURE SATURATED LIQUID TEMPERATURE F PSIG R 410A 200 70 210 73 220 76 225 78 235 80 245 83 255 85 265 88 275 90 285 92 295 95 305 97 325 101 355 108 375...

Page 11: ...5 14 F 1 F 2 11 F 1 F 2 5 9 F 1 F 3 9 F 1 F 3 5 9 F 1 F 4 9 F 1 F 5 9 F 1 F ADVANCED ADJUSTMENT RECOMMENDATIONS NOTE Units matched with indoor coils equipped with a TXV should be charged by Subcooling...

Page 12: ...n Motor Repair or Replace Shorted or Grounded Fan Motor Test Motor Windings Improper Cooling Anticipator Check Resistance of Anticipator Shortage or Refrigerant Test For Leaks Add Refrigerant Restrict...

Page 13: ...rflow If cleaning of the outdoor coil becomes necessary hire a qualified servicer Inexperienced people could easily puncture the tubing in the coil Even a small hole in the tubing could eventually cau...

Page 14: ...tdoor Unit Suction Circuit Pressure Suction Line Temperature PSIG TEMP F Liquid Circuit Pressure Liquid Temperature PSIG TEMP F Outdoor Air Temperature Dry bulb Wet bulb DB F WB F SUPERHEAT SUBCOOLING...

Page 15: ...15 THIS PAGE IS LEFT INTENTIONALLY BLANK...

Page 16: ...CT REGISTRATION Thank you for your recent purchase Though not required to get the protection of the standard warranty registering your product is a relatively short process and entitles you to additio...

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