Fujitsu FO2416RTJNAA Installation Instructions Manual
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Fujitsu FO2416RTJNAA Installation Instructions Manual

Fujitsu FO2416RTJNAA Installation Instructions Manual

R-410a heat pump outdoor units, 16 seer two-stage non-communicating heat pump
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WARNING:
RECOGNIZE THIS SYMBOL
AS AN INDICATION OF
IMPORTANT SAFETY
INFORMATION
WARNING
THESE INSTRUCTIONS
ARE INTENDED AS AN AID
TO QUALIFIED, LICENSED
SERVICE PERSONNEL FOR
PROPER INSTALLATION,
ADJUSTMENT, AND
OPERATION OF THIS UNIT.
READ THESE INSTRUCTIONS
THOROUGHLY BEFORE
ATTEMPTING INSTALLATION
OR OPERATION. FAILURE
TO FOLLOW THESE
INSTRUCTIONS MAY RESULT
IN IMPROPER INSTALLATION,
ADJUSTMENT, SERVICE,
OR MAINTENANCE
POSSIBLY RESULTING IN
FIRE, ELECTRICAL SHOCK,
PROPERTY DAMAGE,
PERSONAL INJURY, OR
DEATH.
Do not destroy this manual.
Please read carefully and
keep in a safe place for future
reference by a serviceman.
[ ] Indicates metric conversions.
92-105074-15-01 ( / ) Printed in USA
R-410A HEAT PUMP
OUTDOOR UNITS
INSTALLATION INSTRUCTIONS
16 SEER TWO-STAGE
NON-COMMUNICATING HEAT PUMP
NOTE: Actual unit appearance
may vary.

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Summary of Contents for Fujitsu FO2416RTJNAA

  • Page 1 WARNING: RECOGNIZE THIS SYMBOL R-410A HEAT PUMP AS AN INDICATION OF IMPORTANT SAFETY INFORMATION OUTDOOR UNITS WARNING THESE INSTRUCTIONS ARE INTENDED AS AN AID TO QUALIFIED, LICENSED INSTALLATION INSTRUCTIONS SERVICE PERSONNEL FOR PROPER INSTALLATION, ADJUSTMENT, AND OPERATION OF THIS UNIT. READ THESE INSTRUCTIONS 16 SEER TWO-STAGE THOROUGHLY BEFORE...

  • Page 2: Table Of Contents

    CONTENTS 6.0 SEQUENCE OF OPERATION............30-31 1.0 IMPORTANT SAFETY INFORMATION............3 2.0 GENERAL INFORMATION..............4-5 .....................31 7.0 COMPONENTS AND CONTROLS............32-34 3.0 UNIT SPECIFICATIONS................6-7 ..................33 ..................33 4.0 INSTALLATION...................8-25 8.0 ACCESSORIES..................35 9.0 DIAGNOSTICS AND TROUBLESHOOTING.........36-47 ................36 ............16 10.0 OUTDOOR UNIT MAINTENANCE ............48 ..................22 11.0 WIRING DIAGRAM ................49-50 ...................23 5.0 SYSTEM START-UP AND REFRIGERANT CHARGING......26-29...

  • Page 3: Important Safety Information

    1.0 IMPORTANT SAFETY INFORMATION WARNINGS: CAUTIONS: • R-410A systems operate at approximately 60% higher • These instructions are intended as an aid to pressures (1.6 times) than R-22 systems. Do not use qualified, licensed service personnel for proper R-22 service equipment or components on R-410A installation, adjustment, and operation of this unit.

  • Page 4: General Information

    2.0 GENERAL INFORMATION • NFPA90A Installation of Air Conditioning and WARNING: Improper installation, or installation not made in accordance with these instructions, can result conditioning systems. in unsatisfactory operation and/or dangerous conditions and can cause the related warranty not to apply. control compartment.
  • Page 5 2.0 GENERAL INFORMATION 2.4 Importance of 2.6 Efficiency Testing Proper Indoor/Outdoor Notice Match-Ups For purposes of verifying or testing efficiency ratings, the test procedure in Title 10 APPENDIX M to Subpart To assure many years of reliable operation B of Part 430 (Uniform Test Method for Measuring the and optimum customer comfort and to assure Energy Consumption of Central Air Conditioners and Heat Pumps) and the clarifying provisions provided in the AHRI...

  • Page 6: Unit Specifications

    3.0 UNIT SPECIFICATIONS 3.1 Model Number Nomenclature 3.2 Available Models FO2416RTJNAA FO3616RTJNAA FO4816RTJNAA FO6016RTJNAA...
  • Page 7 Mfr. Part No. (**) 137 (3884) 208/230 13.0/13.0 58.3 20/20 30/30 25/25 550 (3792) 250 (1723) COPELAND 55-23156-47 9195 None FO2416RTJNAA FO3616RTJNAA 156 (4423) 208/230 17.0/17.0 25/25 40/40 30/30 550 (3792) 250 (1723) COPELAND 55-23156-36 9196 None FO4816RTJNAA 196 (5557) 208/230 23.6/23.6...

  • Page 8: Installation

    4.0 INSTALLATION 4.1 Tools and Refrigerant 4.1.1 Tools Required for Pressure: The pressure of R-410A is approximately 60% (1.6 times) greater than Installing and Servicing R-22. Recovery and recycle equipment, pumps, R-410A Models ratings appropriate for R-410A. Manifold sets need Manifold Sets: to range up to 800 psig [5,516 kPa] high-side and 250 psig [1,724 kPa] low-side with a 550 psig...
  • Page 9 4.0 INSTALLATION 4.2 Choosing a Location 4.2.1 Allowable Clearances 4.2.2 Operational Issues Related to Unit Location 24" to service access panels IMPORTANT: 60" vertical for fan discharge Locate the unit in a the performance of other equipment installed and are permitted: in proximity to the unit.
  • Page 10 4.0 INSTALLATION 4.2 Choosing a Location (cont.) 4.2.3 Corrosive Environment WARNING: The metal parts of this unit may be subject to to unit before starting maintenance. Failure to do rust or deterioration if exposed to a corrosive environment. This oxidation could shorten the personal injury or death.
  • Page 11 4.0 INSTALLATION 4.3.3 Elevating Unit NOTICE: of unit. WARNING: Secure an elevated unit and its elevating stand in order to prevent tipping. Failure to do so may secure unit and elevating stand such that unit and/or stand result in severe personal injury or death. try to climb on unit.
  • Page 12 4.0 INSTALLATION 4.4 Refrigerant Line Set Selection 4.4.1 Replacing Existing Systems IMPORTANT: When replacing an the line set or ensure that residual mineral oil is drained from existing lines including oil trapped in replacement units, a liquid line filter drier must be installed and the line set must be properly sized.
  • Page 13 4.0 INSTALLATION 4.4 Refrigerant Line Set Selection (cont.)
  • Page 14 4.0 INSTALLATION 4.4 Refrigerant Line Set Selection (cont.) Example: This application is acceptable because the 25' the Indoor unit, requires a 75' of 3/8" diameter liquid vertical rise is less than the maximum rise of 50' for this application. The application is also considered to have a long line set since 75 linear feet exceeds the limit of 0 feet.
  • Page 15 4.0 INSTALLATION 4.4 Refrigerant Line Set Selection (cont.) 4.4.4 Vapor Line Selection moving refrigerant and is circulated through the Purpose of the vapor line is to return superheated vapor to the condensing unit from the evaporator the compressor for the oil to be able to return to the in the cooling mode and hot discharge gas to the compressor to maintain an adequate level of oil in indoor coil in the heating mode.
  • Page 16 4.0 INSTALLATION 4.4 Refrigerant Line Set Selection (cont.) 4.4.5.6 Oil Level Adjustment for 4.4.5.7 Capacity Losses Long Line Set Applications Long line lengths can result in a reduction in capacity due to vapor line pressure drop and heat gain or loss. Refer to Table 2 for capacity loss multipliers for vari- ous vapor line diameters and lengths.
  • Page 17 4.0 INSTALLATION 4.5 Line Set Installation • If tubing is to be run underground, it must be run in structure. Use a good quality tubing bender on the vapor line before connecting to the outdoor unit and indoor coil to remove debris that can plug the expansion device.
  • Page 18 4.0 INSTALLATION 4.5 Line Set Installation (cont.) 4.5.2 Relative Location of Indoor and Outdoor Units 4.5.2.1 Indoor and Outdoor Unit Near Same Level REFERENCE TABLE 2 FOR IDEALLY, LINE SET SLOPES AWAY SUB-COOLING PRIOR TO FOR LONG LINE APPLICATIONS. INSULATE APPLICATIONS.
  • Page 19 4.0 INSTALLATION 4.5 Line Set Installation (cont.) 4.5.2.2 Outdoor Unit Below Indoor Unit ROUTE REFRIGERANT LINES COIL OR INSTALL INSULATE UNCONDITIONED SPACE FOR LONG LINE LINE FULL LENGTH APPLICATIONS FOR ALL APPLICATIONS REFERENCE TABLE 2 FOR LIMITATIONS Figure 4 For applications that are considered to have a long •...
  • Page 20 4.0 INSTALLATION 4.5 Line Set Installation (cont.) 4.5.2.3 Outdoor Unit Above Indoor Unit LINE FULL LENGTH FOR ALL APPLICATIONS LINE IN UNCONDITIONED SPACE FOR LONG LINE APPLICATIONS REFERENCE TABLE 2 FOR LIMITATIONS SUB-COOLING PRIOR TO METERING COIL For applications that are considered to have a long •...
  • Page 21 4.0 INSTALLATION 4.5 Line Set Installation (cont.) 4.5.3 Tubing Connections Indoor coils have only a holding charge of connections are to be made. • Use type “L” copper refrigeration tubing. Braze – copper to copper, 5% silver minimum • – copper to steel or brass, 15% silver minimum compound before applying heat.
  • Page 22 4.0 INSTALLATION 4.6 Initial Leak Testing 4.7 Evacuation Indoor coils have only a holding charge of dry Evacuation is one of the most important parts of the entire installation and service procedure. The life are to be made. and efficiency of the equipment is dependent upon WARNING: Do not use oxygen evacuating air and moisture from the system.
  • Page 23 4.0 INSTALLATION 4.9 Control Wiring WARNING: Do not use phone cord to connect indoor and outdoor units and thermostat. This could damage electrical connections. Also, the ground connection the controls and may not be adequately sized for connections. Failure to do so can result in electrical FIELD WIRE SIZE FOR 24-VOLT THERMOSTAT CIRCUITS: Runs up to 100 ft [30.5 m]: 18 AWG...
  • Page 24 4.0 INSTALLATION 4.10 Typical Control Wiring Connections (Cont.) 2-STAGE HEAT PUMP WITH ELECTRIC HEAT USING A TYPICAL 2-STAGE HEAT PUMP WITH ELECTRIC HEAT USING A TYPICAL 2-STAGE THERMOSTAT WITH DEHUMIDIFICATION 2-STAGE THERMOSTAT WITH DEHUMIDIFICATION AND A MAL- FUNCTION LIGHT Typical Two-Stage Thermostat Typical Two-Stage Thermostat Y2 G E/W1...
  • Page 25 4.0 INSTALLATION 4.11 Power Wiring 4.12 Grounding commercial utility is available at the outdoor unit WARNING: The unit must be permanently grounded. Failure to do so can cause VOLTAGE RANGES Operating Voltage Range at Maximum or death. Nameplate Voltage Load Design Conditions for Compressors Copeland 208/230 (1 Phase) 187 - 253...
  • Page 26 5.0 SYSTEM START-UP & REFRIGERANT CHARGING 5.1 System Start-Up Air supply diffusers must be selected and located Overview carefully. They must be sized and positioned to deliver treated air along the perimeter of the space. Once the system hardware and wiring has been properly installed, the next step is to start the become noisy.

  • Page 27: System Start-Up And Refrigerant Charging

    5.0 SYSTEM START-UP & REFRIGERANT CHARGING 5.4 Refrigerant Charging 5.4.1 Measurement Device Set-Up The refrigerant charge for all systems should be 1. With an R-410A gauge set, attach the high- the access panel cover. pressure hose to the access fitting on the liquid line (small) service valve at the OD unit.
  • Page 28 5.0 SYSTEM START-UP & REFRIGERANT CHARGING Charge Adjustment = (1.2 oz. × conditions ONLY: Cooling Mode ONLY: 55°F [12.8°C] outdoor dry bulb and above volumetric charging device, adjust the refrigerant charge based on the actual line set length. If the 60°F [15.6°C] outdoor dry bulb entire system has been evacuated, add the total 3.
  • Page 29 5.0 SYSTEM START-UP & REFRIGERANT CHARGING NOTICE: 5.4.5 R-410A Temperature If the indoor temperature is Pressure Chart SATURATION R-410A SATURATION R-410A SATURATION R-410A SATURATION R-410A electric heat/furnace to bring the temperature up. TEMP TEMP TEMP TEMP PSIG PSIG PSIG PSIG (Deg.

  • Page 30: Sequence Of Operation

    6.0 SEQUENCE OF OPERATION 6.1 Cooling Mode 6.3 Supplemental Electric Heat in Heating Mode When the 2-stage thermostat calls for the 1st stage of cooling, the outdoor fan motor is energized and If the building load should exceed the heating capacity motor is energized.
  • Page 31 6.0 SEQUENCE OF OPERATION 6.5 Demand Defrost Defrosting of the outdoor coil in the heating mode continue until the coil temperature has reached is controlled by the defrost control located in the outdoor unit. TZPLD16 heat pumps feature “de- the termination temperature or 14 minutes mand defrost”...

  • Page 32: Components And Controls

    7.0 COMPONENTS & CONTROLS 7.1 Demand Defrost The test mode is initiated by momentarily shorting Control heat pump heating call to enter the test mode. In this mode of operation, the enable temperature is ignored and all timers are sped up. To initiate When the thermostat calls for cooling, the demand a manual defrost, short and hold the TEST pins.
  • Page 33 7.0 COMPONENTS & CONTROLS 7.4 Outdoor Fan control is an automatic reset type and opens at All models utilize a standard paddle 2 or 3 blade fan made from either aluminum or coated steel. 7.5 Compressor modes. Cooling Mode: The compressor and fan motor Contractor nected directly to the terminal lugs on the line side of the contactor.
  • Page 34 7.0 COMPONENTS & CONTROLS 7.10 Thermal Expansion Valve (TXV) to help eliminate “hammering” in the off cycle that on both the indoor coil and outdoor heat pump unit. valve that opens in the cooling mode to provide 7.11 Compressor Crankcase Heater (CCH) While scroll compressors usually do not require bottom of the compressor shell.

  • Page 35: Accessories

    8.0 ACCESSORIES 8.4 Compressor WARNING: Crankcase Heater 2 Ton Model: Part No. 44-101884-08 severe personal injury, or death. temp. thermostat) or 44-17402-44 CAUTION: temp. thermostat) NOTE: 3 – 5 ton models have factory installed SINGLE POLE COMPRESSOR CONTACTOR (CC): 8.5 Heat Pump Single pole contactors are used on all single-phase units up through 5 tons.

  • Page 36: Diagnostics And Troubleshooting

    9.0 DIAGNOSTICS & TROUBLESHOOTING 9.1 Defrost Control Diagnostic Codes LED 1 LED 2 Control Board Status No Power Coil Sensor Failure Ambient Sensor Failure FLASH FLASH Normal FLASH Low Pressure Lockout (short test pins to reset) FLASH High Pressure Lockout (short test pins to reset) FLASH Low Pressure Control Open FLASH...
  • Page 37 9.0 DIAGNOSTICS & TROUBLESHOOTING 9.3 Electrical Checks Flowchart THERMOSTAT CALL FOR OPERATION, NO OPERATION...
  • Page 38 9.0 DIAGNOSTICS & TROUBLESHOOTING 9.4 Cooling Mechanical Checks Flowchart...
  • Page 39 9.0 DIAGNOSTICS & TROUBLESHOOTING 9.5 Heating Mechanical Checks Flowchart...
  • Page 40 9.0 DIAGNOSTICS & TROUBLESHOOTING 9.6 Defrost Mechanical Checks Flowchart 9.7 Defrost Test Mode (See Section 7.1)
  • Page 41 9.0 DIAGNOSTICS & TROUBLESHOOTING 9.8 General Troubleshooting Guide WARNING: SYMPTOM POSSIBLE CAUSE REMEDY condensing unit. high • Reset. • Defective control board • Transformer defective Outdoor fan runs, • Run or start capacitor defective • Replace. compressor doesn't • Start relay defective •...
  • Page 42 9.0 DIAGNOSTICS & TROUBLESHOOTING 9.9 Service Analyzer Charts COMPRESSOR OVERHEATING SYMPTOM POSSIBLE CAUSE CHECK/REMEDY High superheat Low charge Check system charge. (greater than 15°F Faulty metering device Restricted cap tube, TXV [8.3°C] at coil) Power element superheat out of adjustment internally High internal load Hot air (attic) entering return Heat source on;...
  • Page 43 9.0 DIAGNOSTICS & TROUBLESHOOTING 9.9 Service Analyzer Charts (cont.) COMPRESSOR OVERHEATING (cont.) SYMPTOM POSSIBLE CAUSE CHECK OR REMEDIES Short cycling of compressor (cont.) Dirty coil Duct too small or restricted Faulty run capacitor Replace. Faulty internal overload Replace compressor. Faulty Compressor Replace compressor and examine system to locate reason.
  • Page 44 9.0 DIAGNOSTICS & TROUBLESHOOTING 9.9 Service Analyzer Charts (cont.) CONTAMINATION SYMPTOM POSSIBLE CAUSE REMEDY Moisture Poor evacuation on installation or during service In each case, the cure is the same. Recover refrigerant. High head pressure Noncondensibles air Reclaim refrigerant, evacuate, and recharge. Unusual head and Wrong refrigerant or mixed refrigerants Reclaim refrigerant, evacuate, and recharge.
  • Page 45 9.0 DIAGNOSTICS & TROUBLESHOOTING 9.9 Service Analyzer Charts (cont.) FLOODING SYMPTOM POSSIBLE CAUSE REMEDY Loose sensing bulb Secure the bulb and insulate. Relocate bulb. Poor system control Use correct replacement. Improper superheat setting (less than 5°F [2.8°C]) THERMOSTATIC EXPANSION VALVE (TXV) SYMPTOM POSSIBLE CAUSE REMEDY...
  • Page 46 9.0 DIAGNOSTICS & TROUBLESHOOTING 9.9 Service Analyzer Charts (cont.) THERMOSTATIC EXPANSION VALVES (cont.) SYMPTOM POSSIBLE CAUSE REMEDY Install trap riser to the top of the evaporator coil. needed Unequal evaporator circuit loading suction pressure Sensing bulb is affected by liquid refrigerant or Relocate sensing bulb in another position around the circumference of the suction line.
  • Page 47 9.0 DIAGNOSTICS & TROUBLESHOOTING 9.10 Troubleshooting Tips COOLING MODE TROUBLESHOOTING TIPS INDICATORS DISCHARGE SUCTION SUPERHEAT COMPRESSOR SYSTEM SUBCOOLING PRESSURE PRESSURE Normal: AMPS PROBLEM Normal: See 5°–15°F Charging Chart [2.8° – 8.3°C] Overcharge High High High High Undercharge High Liquid Restriction High High (Filter Drier)

  • Page 48: Outdoor Unit Maintenance

    10.0 OUTDOOR UNIT MAINTENANCE 10.1 Outdoor Coil Cleaning from the inside out is the most effective method of cleaning the coil. The exterior louver panels and unit top are easily removable to facilitate the coil resulting in reduced capacity and efficiency and increases the temperature of the components that can reduce their life.

  • Page 49: Wiring Diagram

    11.0 WIRING DIAGRAMS 11.1: 2 and 3 Ton Models with ECM Fan Motor...
  • Page 50 11.0 WIRING DIAGRAMS 11.2: 4 and 5 Ton Models with PSC Fan Motor...

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