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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.
Do not bypass safety devices.
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.
Our continuing commitment to quality products may mean a change in specifications without notice.
© 2023
IOD-4046A
03/2023
WARNING
WARNING
WARNING
19001 Kermier Rd. Waller, TX 77484
www.daikincomfort.com
INSTALLATION INSTRUCTIONS
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.
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Summary of Contents for Daikin DX3SEA
- Page 1 Specification sheets can be found at for any injury or property damage arising from improper www.daikincomfort.com for Daikin. Within either website, service or service procedures. If you service this unit, you please select the residential or commercial products menu assume responsibility for any injury or property damage which may result.
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Page 2: Installation Clearances
Outdoor units are approved for operation above 55°F in This unit can be located at ground floor level or on flat cooling mode. Operation below 55°F requires the use of an roofs. At ground floor level, the unit must be on a solid, approved low ambient kit. -
Page 3: Refrigerant Lines
RECOMMENDED INTERCONNECTING TUBING (Ft) WARNING Cond 0-24 25-49 50-79* Line Diameter (In. OD) Unit To avoid possible explosion, use only returnable (not disposable) service cylinders when removing refrigerant Tons Suct Suct Suct from a system. 1 1/2 • Ensure the cylinder is free of damage which could lead to a leak or explosion. -
Page 4: Leak Testing (Nitrogen Or Nitrogen-Traced)
NOTE: If using existing indoor coil and changing 3. After brazing, quench the joints with water or a wet refrigerant types, ensure the indoor coil and cloth to prevent overheating of the service valve. metering device are compatible with the type 4. - Page 5 Leak test the system using dry nitrogen and soapy 2: If the same result is achieved check for leaks and water to identify leaks. If you prefer to use an electronic repair. Repeat the evacuation procedure. leak detector, charge the system to 10 PSIG with the 5.
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Page 6: Overcurrent Protection
MAXIMUM ALLOWABLE LENGTH IN FEET TO LIMIT Overcurrent Protection VOLTAGE DROP TO 2% The following overcurrent protection devices are approved for use. Wire Minimum Circuit Ampacity (MCA) • Time delay fuses Size • HACR type circuit breakers (AWG) These devices have sufficient time delay to permit the motor-compressor to start and accelerate its load. -
Page 7: System Start-Up
SYSTEM START UP Do not introduce liquid refrigerant from the cylinder into the crankcase of the compressor as this may damage the compressor. CAUTION CAUTION POSSIBLE REFRIGERANT LEAK To avoid a possible refrigerant leak, open the service valves until the top of the stem is 1/8” from the retainer. POSSIBLE REFRIGERANT LEAK To avoid a possible refrigerant leak, open the service valves until the top of the stem is 1/8”... - Page 8 NOTE: Superheat adjustments should not be made until indoor ambient conditions have stabilized. This could take up to 24 hours depending on indoor temperature and humidity. Before checking superheat run the unit in cooling for 10-15 minutes or until refrigerant pressures stabilize. Use the following guidelines and methods to check unit operation and ensure that the refrigerant charge is within limits.
- Page 9 System Superheat Targets for Piston Match-ups (+/- 1.0 °F) Indoor Wet Bulb Temperature, °F Outdoor Dry Bulb Temperature, °F Superheat Formula = Suct. Line Temp. - Sat. Suct. Temp.
- Page 10 SATURATED SUCTION PRESSURE SATURATED LIQUID PRESSURE TEMPERATURE CHART TEMPERATURE CHART SATURATED SUCTION SATURATED LIQUID SUCTION PRESSURE LIQUID PRESSURE TEMPERATURE ºF TEMPERATURE ºF PSIG R-410A PSIG R-410A NOTE: Specifications And Performance Data Listed Herein Are Subject To Change Without Notice.
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Page 11: Expansion Valve System
EXPANSION VALVE SYSTEM ADVANCED ADJUSTMENT RECOMMENDATIONS NOTE: Units matched with indoor coils equipped NOTE: Units matched with indoor coils equipped with a TXV should be charged by Subcooling only. with a TXV should be charged by Subcooling only. SUBCOOLING FORMULA = SATURATED LIQUID LINE SUPERHEAT FORMULA = SUCTION LINE TEMPERATURE - LIQUID LINE TEMPERATURE TEMPERATURE - SATURATED SUCTION... -
Page 12: Troubleshooting Information
TROUBLESHOOTING INFORMATION System Unsatisfactory Complaint No Cooling Operating Cooling Pressures POSSIBLE CAUSE Test Method DOTS IN ANALYSIS Remedy GUIDE INDICATE "POSSIBLE CAUSE" Power Failure • Test Voltage Blown Fuse • • • Impact Fuse Size & Type Loose Connection • •... -
Page 13: Split Systems
SPLIT SYSTEMS AIR CONDITIONING AND HEAT PUMP homeowner’s Routine Maintenance Recommendations We strongly recommend a bi-annual maintenance checkup be performed before the heating and cooling seasons begin by a qualified servicer. Replace or Clean Filter Clean Outside Coil (Qualified Servicer Only) IMPORTANT NOTE: Never operate unit without a WARNING filter installed as dust and lint will build up on... -
Page 14: Start-Up Checklist
START-UP CHECKLIST Condenser / Heat Pump (including all Inverter) Model Number Serial Number ELECTRICAL (Outdoor Unit) Line Voltage (Measure L1 and L2 Voltage) L1 - L2 Secondary Voltage (Measure Transformer Output Voltage) NOT ALL MODELS R - C Compressor Amps Condenser Fan Amps TEMPERATURES (Indoor Unit) Return Air Temperature (Dry bulb / Wet bulb) - Page 15 THIS PAGE IS LEFT INTENTIONALLY BLANK.
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Page 16: Customer Feedback
CUSTOMER FEEDBACK Daikin Comfort Technologies 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.
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