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Fujitsu FO14R Series Installation Instructions Manual

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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.
92-105074-13-01 (10/18) Printed in USA
R-410A HEAT PUMP
OUTDOOR UNITS
INSTALLATION INSTRUCTIONS
FO14R (14 SEER) AND FO15R (15 SEER)
ACCREDITED

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  Summary of Contents for Fujitsu FO14R Series

  • Page 1 WARNING: RECOGNIZE THIS SYMBOL AS AN INDICATION OF R-410A HEAT PUMP IMPORTANT SAFETY INFORMATION. OUTDOOR UNITS WARNING THESE INSTRUCTIONS ARE INTENDED AS AN AID TO QUALIFIED, LICENSED SERVICE PERSONNEL FOR INSTALLATION INSTRUCTIONS PROPER INSTALLATION, ADJUSTMENT, AND OPERATION OF THIS UNIT. READ THESE INSTRUCTIONS FO14R (14 SEER) AND FO15R (15 SEER) THOROUGHLY...
  • Page 2: Table Of Contents

    CONTENTS Important Start-Up ............. 25-26 Safety Information ..........3 Start-Up ..............25 Efficiency Testing Notice ..........3 Checking Airflow ............25 Evacuation Procedure ..........26 General Information ........4-7 Final Leak Testing .............26 Checking Product Received .........4 Application ..............4 Checking Electrical and Physical Data ........4-5 Refrigerant Charge ........
  • Page 3: Important Safety Information

    IMPORTANT SAFETY INFORMATION WARNINGS: CAUTIONS: • These instructions are intended as an aid to • R-410A systems operate at approximately 60% higher qualified, licensed service personnel for proper pressures (1.6 times) than R-22 systems. Do not use installation, adjustment, and operation of this unit. R-22 service equipment or components on R-410A Read these instructions thoroughly before attempting equipment.
  • Page 4: General Information

    GENERAL INFORMATION Application WARNING: Before specifying any heat pump equipment, Improper installation, or installation not a survey of the structure and a heat loss and made in accordance with these instructions, heat gain calculation must be made. A heat loss can result in unsatisfactory operation and/ calculation involves identifying all surfaces and or dangerous conditions and can cause the...
  • Page 5: Electrical And Physical Data

    GENERAL INFORMATION Electrical and Physical Data ELECTRICAL PHYSICAL Compressor Outdoor Coil Weight Fuse or HACRCircuit Breaker Rated Load Locked Rotor Minimum Circuit Model # Major Fan Motor Full Refrig. Per Circuit Minimum Maximum Amperes Amperes Capacity Series Voltage Phase Freq Load Amperes (FLA) Ampacity Amperes Face Area Sq.
  • Page 6 42 – 42,000 BTU 24 – 24,000 BTU 48 – 48,000 BTU 30 – 30,000 BTU 60 – 60,000 BTU 36 – 36,000 BTU BRAND FO – FUJITSU ALLOW 60” [1524mm] OF CLEARANCE “W” “L” “H” SERVICE PANELS/ INLET CONNECTIONS / HIGH & LOW VOLTAGE ACCESS ALLOW 24”...
  • Page 7: Specifications

    GENERAL INFORMATION Specifications Major Major Major Major Major Major Major Major Size Size Size Size Size Size Size Size Series Series Series Series Series Series Series Series 14 SEER Heat Pump Height “H” inches (mm) 25 (635) 31 (787) 27 (686) 35 (889) 39 (991) 45 (1143)
  • Page 8: Installation

    INSTALLATION Choosing a Location IMPORTANT: Corrosive Environment Consult local and national building codes and ordinances for special The metal parts of this unit may be subject to installation requirements. Following location rust or deterioration if exposed to a corrosive information will provide longer life and simplified environment.
  • Page 9: For Units With Space Limitations

    INSTALLATION Choosing a Location (cont.) For Units With Space • If elevating a unit on a flat roof, use 4" × 4" [10.2 cm × 10.2 cm] or equivalent stringers Limitations positioned to distribute unit weight evenly and In the event that a space limitation exists, we will prevent noise and vibration.
  • Page 10: Snow Depth Table

    INSTALLATION Choosing a Location (cont.) GROUND SNOW DEPTH – INCHES ALABAMA INDIANA MINNESOTA NEW MEXICO PENNSYLVANIA VIRGINIA Huntsville Evansville Duluth Albuquerque Allentown Dulles Airport ARIZONA Fort Wayne International Falls Clayton Erie Lynchburg Flagstaff Indianapolis Minneapolis/St. Paul 50 Roswell Harrisburg National Airport Prescott South Bend Rochester...
  • Page 11: Tools And Refrigerant

    INSTALLATION Tools and Refrigerant Tools Required for Installing Pressure: The pressure of R-410A is approximately 60% (1.6 times) greater than and Servicing R-410A Models R-22. Recovery and recycle equipment, pumps, Manifold Sets: hoses, and the like must have design pressure ratings appropriate for R-410A.
  • Page 12: Replacement Units

    INSTALLATION Replacement Units IMPORTANT: To prevent failure of a new unit, the existing line set When replacing an must be correctly sized and cleaned or replaced. R-22 unit with an R-410A unit, either replace Care must be exercised that the expansion device the line set or ensure that residual mineral oil is is not plugged.
  • Page 13: Interconnecting Tubing And Fitting Losses

    INSTALLATION Interconnecting Tubing (cont.) Interconnecting Tubing and Fitting Losses ent commonly used equivalent lengths. Refrigerant tubing is measured in terms of actual length and equivalent length. Actual length is used for refrigerant charge applications. Equivalent length takes into account pressure losses from tub- Table 1 Equivalent Length for Fi ngs ( ) 90°...
  • Page 14: Long Line Set Applications

    INSTALLATION Interconnecting Tubing (cont.) Example: line, and 4 90° LR elbows. application. The application is also considered to have a long line set. Reference the long line set sec- tion of the I&O for detail. • Liquid Line Size Liquid Line Elevation (Above or Below) Indoor Coil R-410A Size...
  • Page 15: Suction Line Selection

    INSTALLATION Interconnecting Tubing (cont.) • The total amount of suction line needed 15 SEER Single Stage Heat Pump • Add all of the equivalent lengths associated with Name Plate Factory ous page. Oil Charge Installed Model # Major Compressor (oz) Capacity Series Voltage...
  • Page 16 INSTALLATION Interconnecting Tubing (cont.) For applications that are considered to have a long • Insulated liquid and suction line in conditioned line set with the outdoor unit and indoor unit on the space only. same level the following is required: •...
  • Page 17 INSTALLATION Interconnecting Tubing (cont.) OUTDOOR UNIT ABOVE INDOOR SECTION LINE SET INSULATE LIQUID AND SUCTION LINE REFERENCE TABLE 2 FOR ELEVATION LIMITATIONS VERIFY SUB-COOLING PRIOR TO THROTTLING DEVICE TXV OR EEV AT INDOOR EVAPORATOR For applications that are considered to have a long •...
  • Page 18 INSTALLATION Interconnecting Tubing (cont.) Table 2A: Refrigerant Line Sizing Chart (English Units) 14 - 15 SEER Single-Stage Heat Pumps Outdoor Unit ABOVE or BELOW Indoor Unit Use Long Line Guidelines for Linear Equivalent Length (Feet) Line Lengths Greater Allowable Allowable Than Shown Below Unit Size Liquid Line...
  • Page 19 INSTALLATION Interconnecting Tubing (cont.) Table 2B: Refrigerant Line Sizing Chart (Metric Units) 14 - 15 SEER Single-Stage Heat Pumps Use Long Line Outdoor Unit ABOVE or BELOW Indoor Unit Guidelines for Linear Allowable Allowable Line Lengths Greater Equivalent Length (Meters) Liquid Line Vapor Line Than Shown Below...
  • Page 20: Tubing Installation

    INSTALLATION Interconnecting Tubing (cont.) Tubing Installation Observe the following when installing correctly sized type “L” refrigerant tubing between the condensing unit and evaporator coil: • Check the tables on page 12 for the correct suction line size and liquid line size. •...
  • Page 21: Tubing Connections

    INSTALLATION Interconnecting Tubing (cont.) • If tubing is to be run underground, it must be run in a sealed watertight chase. • Use care in routing tubing and do not kink or twist. Use a good tubing bender on the vapor line to prevent kinking.
  • Page 22: Leak Testing

    INSTALLATION Interconnecting Tubing (cont.) Leak Testing Indoor coils have only a holding charge of dry nitrogen. Keep all tube ends sealed until connections are to be made. WARNING: Do not use oxygen to purge lines or pressurize system for leak test. Oxygen reacts violently with oil, which can cause an explosion resulting in severe personal injury or death.
  • Page 23: Wiring

    WIRING Control Wiring Low voltage control wiring should be 18 Awg. WARNING: Turn off electric power color-coded. For lengths longer than 100 ft., 16 at the fuse box or service panel before making any Awg. wire should be used. electrical connections. Also, the ground connection must be completed before making line voltage connections.
  • Page 24: Power Wiring

    WIRING Control Wiring (cont.) TYPICAL 1-STAGE DUAL FUEL THERMOSTAT AND Power wiring must be run in a rain-tight conduit. DUAL-FUEL APPLICATION Conduit must be run through the connector panel below the access cover (see page 6) and attached to the bottom of the control box. Typical One-Stage Furnace...
  • Page 25: Start-Up

    START-UP Start-Up Even though the unit is factory-charged with Refrigerant-410A, the charge must be checked to the charge table attached to the service panel and adjusted, if required. Allow a minimum of 15 minutes of run time before analyzing charge. CAUTION: Single-pole contactors are used on all standard single-phase units...
  • Page 26: Evacuation Procedure

    START-UP Evacuation and Leak Testing Evacuation Procedure Evacuation is the most important part of the entire service procedure. The life and efficiency of the equipment is dependent upon the thoroughness exercised by the serviceman when evacuating air and moisture from the system. Air or nitrogen in the system causes high condensing temperatures and pressure, resulting in increased power input and nonverifiable...
  • Page 27: Refrigerant Charge

    START-UP Checking Refrigerant Charge Confirm ID Airflow and Coils Charge for all systems should be checked against the Charging Chart inside the access panel cover. Are Clean WARNING: The top of the scroll Confirm adequate indoor supply airflow prior to compressor shell is hot.
  • Page 28: Gross Charging By Pressures

    START-UP Checking Refrigerant Charge (cont.) 2. Note the Outdoor Dry Bulb Temperature, or volumetric charging device, adjust charge ODDB° = _____°F [_____°C]. Unit charging difference between that shown on the unit data is recommended under the following outdoor conditions ONLY: plate and that calculated for the new system installation.
  • Page 29: Finishing Up Installation

    START-UP Checking Refrigerant Charge (cont.) NOTICE: requirement for the given outdoor and indoor If the indoor temperature is conditions, add charge. If the measured subcool above or below the recommended range, run the is above the listed requirement for the given system to bring the temperature down or run the outdoor and indoor conditions, remove charge.
  • Page 30: Components And Controls

    COMPONENTS & CONTROLS Compressor Crankcase Heat (CCH) While scroll compressors usually do not require ll heaters are located on the lower half of the crankcase heaters, there are instances when a compressor shell. Its purpose is to drive refrigerant heater should be added. Refrigerant migration from the compressor shell during long cycles, thus during the off cycle can result in a noisy start up.
  • Page 31: High- And Low-Pressure Controls (Hpc And Lpc)

    COMPONENTS & CONTROLS High- and Low-Pressure Controls (HPC and LPC) Standard on RP14: These controls keep the CAUTION: The compressor has an compressor from operating in pressure ranges internal overload protector. Under some conditions, which can cause damage to the compressor. Both controls are in the low-voltage control circuit.
  • Page 32 COMPONENTS & CONTROLS Demand Defrost Control (cont.) High/Low Pressure Control Monitoring – will start again when the low side pressure rises Enhanced Defrost Control Only to approximately 40 psig when the low pressure control automatically resets. If the low pressure Status of high and low pressure controls is switch opens 3 times within a particular call for monitored by the enhanced feature demand defrost...
  • Page 33: Accessories

    ACCESSORIES Heat Pump Thermostat WARNING: Turn off electric power Warning Light Kit RXPX-D01 at the fuse box or service panel before making any electrical connections. Also, the ground connection This component senses a compressor lock out and must be completed before making line voltage tells the thermostat service light to come on.
  • Page 34: Diagnostics

    DIAGNOSTICS Cooling Mechanical Checks Flowchart Outdoor Unit Running? Go to Electrical Checks Flowchart Pressure Problems? High Head Low Liquid Low Suction Pressure Pressure Pressure Dirty Outdoor Low on Dirty Filters Coil Charge Inoperative Outdoor Open IPR Dirty Indoor Coil Valve Low Ambient Inadequate Indoor Overcharge...
  • Page 35: Heating Mechanical Checks Flowchart

    DIAGNOSTICS Heating Mechanical Checks Flowchart Outdoor Unit Running? Go to Electrical Checks Flowchart Pressure Problems? High Liquid Low Liquid Low Suction Pressure Pressure Pressure Dirty Indoor Low on Dirty Outdoor Coil Coil Charge Inoperative Indoor Open IRP Inadequate Outdoor Valve Airflow Low Indoor Inoperative Outdoor...
  • Page 36: Defrost Mechanical Checks Flowchart

    DIAGNOSTICS Defrost Mechanical Checks Flowchart Defrost System Incomplete Excessive Defrost Defrost Defrost Reversing Valve Poor Sensor Wrong Defrost Control Stuck Location Timer Setting No Defrost Timer Wrong Defrost Control Poor Sensor Control Power Timer Setting Location Failed Defrost Low System Failed Defrost Relay Control Charge...
  • Page 37: General Troubleshooting Chart

    DIAGNOSTICS General Troubleshooting shock resulting in personal injury or death. Chart WARNING: Disconnect all power to unit before servicing. Contactor may break only one side. Failure to shut off power can cause electrical SYMPTOM POSSIBLE CAUSE REMEDY Unit will not run •...
  • Page 38: Service Analyzer Charts

    DIAGNOSTICS 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, TEV (TXV) [-9°C] at coil) Power element superheat out of adjustment internally High internal load Hot air (attic) entering return Heat source on;...
  • Page 39 DIAGNOSTICS Service Analyzer Charts COMPRESSOR OVERHEATING (cont.) SYMPTOM POSSIBLE CAUSE CHECK OR REMEDIES Short cycling of Low charge Check system charge. compressor (cont.) Dirty coil Duct too small or restricted Faulty run capacitor Replace. Faulty internal overload Replace compressor. Faulty Compressor Fast equalization/Low pressure difference Replace compressor and examine system to Valves...
  • Page 40 DIAGNOSTICS Service Analyzer Charts 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 Unusual head and Wrong refrigerant or mixed refrigerants suction readings Foreign matter –...
  • Page 41 DIAGNOSTICS Service Analyzer Charts FLOODING SYMPTOM POSSIBLE CAUSE REMEDY Loose sensing bulb Secure the bulb and insulate. Bulb in wrong location Relocate bulb. Poor system control using a TEV Wrong size TEV Use correct replacement. Improper superheat setting (less than 5°F [-15°C]) Replace TEV.
  • Page 42 DIAGNOSTICS Service Analyzer Charts THERMOSTATIC EXPANSION VALVES (cont.) SYMPTOM POSSIBLE CAUSE REMEDY Install trap riser to the top of the evaporator coil. Inoperable crankcase heater or crankcase heater Replace or add crankcase heater. needed back upon start-up Any of the causes listed under symptoms of Elec- Any of the solutions listed under solutions of Electrical trical problems on page 45 problems on page 45...
  • Page 43: Cooling/Heating Tips

    DIAGNOSTICS COOLING MODE TROUBLESHOOTING TIPS INDICATORS DISCHARGE SUCTION SUPERHEAT COMPRESSOR SYSTEM SUBCOOLING PRESSURE PRESSURE Normal: AMPS PROBLEM Normal: See 5°–15°F Charging Chart [-15° – -9°C] Overcharge High High High High Undercharge High Liquid Restriction High High (Drier) Dirty Outdoor Coil High High High...
  • Page 44: Wiring Diagrams

    WIRING DIAGRAMS FOR SINGLE PHASE WITH PSC FAN MOTORS...
  • Page 45 WIRING DIAGRAMS 3 PHASE 208/230V MODELS...
  • Page 46 WIRING DIAGRAMS FOR 3 PHASE, 460/575V...
  • Page 47 WIRING DIAGRAMS...

This manual is also suitable for:

Fo15r series