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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.
Printed in USA
92-104921-18-00 (3/17)
AIR COOLED
CONDENSING UNITS
INSTALLATION INSTRUCTIONS
FO13C, FO14C & FO16C MODEL SERIES –
13, 14 & 16 SEER
FEATURING INDUSTRY STANDARD
R-410A REFRIGERANT
e a r t h
e a r t h f r i e n d l y r e f r i g e r a n t
r
h
f r
r i e
e n
d l y
y r
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Table of Contents
Troubleshooting
Related Manuals for Rheem FO13C Series
Summary of Contents for Rheem FO13C Series
- Page 1 WARNING: RECOGNIZE THIS SYMBOL AS AN INDICATION OF IMPORTANT SAFETY INFORMATION AIR COOLED WARNING CONDENSING UNITS THESE INSTRUCTIONS ARE INTENDED AS AN AID TO QUALIFIED, LICENSED INSTALLATION INSTRUCTIONS SERVICE PERSONNEL FOR PROPER INSTALLATION, ADJUSTMENT, AND OPERATION OF THIS FO13C, FO14C & FO16C MODEL SERIES – UNIT.
-
Page 2: Table Of Contents
CONTENTS Important Start-Up ............30–32 Start-Up ..............30 Safety Information ..........3 Efficiency Testing Notice ..........3 Checking Airflow ............30 Evacuation Procedure ..........31 General Information ........4-7 Final Leak Testing ............31 Checking Product Received ........4 Application ..............4 Checking Electrical and Physical Data ........5-6 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 pressures (1.6 times) than R-22 systems. Do qualified, licensed service personnel for proper not use R-22 service equipment or components on installation, adjustment, and operation of this R-410A equipment. -
Page 4: General Information
GENERAL INFORMATION Application WARNING: Before specifying any air conditioning equipment, Improper installation, or installation not a survey of the structure and a heat gain made in accordance with these instructions, calculation must be made. A cooling heat gain can result in unsatisfactory operation and/ calculation determines the amount of heat needed or dangerous conditions and can cause the to be removed. -
Page 5: Electrical And Physical Data
GENERAL INFORMATION Electrical and Physical Data 13 SEER R-410A Single Stage Air Conditioner ELECTRICAL PHYSICAL Compressor Outdoor Coil Weight Minimum Fuse or HACR Rated Load Locked Rotor Circuit Rows [L/s] Lbs. Circuit Breaker Amperes Amperes Fan Motor Full Load Ampacity (FLA) [kg] Refrig. -
Page 6: Unit Model Number
GENERAL INFORMATION Electrical and Physical Data - cont. 14 SEER R-410A Single Stage Air Conditioner - Design Series "W" Southwest Regional ELECTRICAL PHYSICAL Compressor Fuse or HACR Outdoor Coil Weight Refrig. Motor Rated Load Locked Rotor Full Minimum Circuit Circuit Breaker Amperes Amperes Load... -
Page 7: Specifications
GENERAL INFORMATION Specifi cations 18, 36 24, 30 Height “H” inches [mm] 27 [686] 25 [635] 31 [787] 27 [686] 31 [787] Length “L” inches [mm] 29.75 [756] 29.75 [756] 29.75 [756] 33.75 [857] 35.75 [908] Width “W” inches [mm] 29.75 [756] 29.75 [756] 29.75 [756]... -
Page 8: Installation
INSTALLATION Choosing a Location Corrosive Environment IMPORTANT: 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 environment. This oxidation could shorten the information will provide longer life and simplified servicing of the outdoor unit. -
Page 9: For Units With Space Limitations
INSTALLATION Choosing a Location (cont.) • If installing a unit on a flat roof, use 4" x 4" For Units With Space [10.2 cm x 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: 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 11: Replacement Units
INSTALLATION Replacement Units To prevent failure of a new unit, the existing line set IMPORTANT: 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 12: Fitting Losses
INSTALLATION Interconnecting Tubing (cont.) tubing length, fi ttings, vertical separation, acces- Interconnecting Tubing and sories, and fi lter dryers. The table below references Fitting Losses diff erent commonly used equivalent lengths. Refrigerant tubing is measured in terms of actual length and equivalent length. Actual length is used for refrigerant charge applications. -
Page 13: Long Line Set Applications
INSTALLATION Interconnecting Tubing (cont.) Example: A 3-Ton condensing unit is installed 50’ below the ID unit, requires a 75’ of 1/2” diameter liquid line, and 4 90° LR elbows. • Fitting Equivalent Length (ft.) = 4 x .9 = 3.6’ •... -
Page 14: Suction Line Selection
INSTALLATION Interconnecting Tubing (cont.) and performance of the system. The procedure for Major Series selecting the proper suction line is as follows: Name Plate Factory Oil Charge Installed • The total amount of suction line needed Model # Compressor (oz) Capacity Voltage/Hz Phase... -
Page 15: Installation
INSTALLATION Interconnecting Tubing (cont.) For applications that are considered to have a long • Insulated liquid and suction line in unconditioned line set with the outdoor unit and indoor unit on the space only. same level the following is required: •... - Page 16 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 17 Table 2...
- Page 18 Table 2 cont.
- Page 20 Table 2 cont.
- Page 21 Table 3...
- Page 22 Table 3 cont.
- Page 24 Table 3 cont.
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Page 25: Tubing Installation
INSTALLATION Interconnecting Tubing (cont.) lineset. Commercially available flush kits are Tubing Installation not recommended due to the risk of residual Observe the following when installing correctly flushing agent being incompatible with POE oils sized type “L” refrigerant tubing between the or internal components. -
Page 26: 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 27: 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 28: Wiring
WIRING Control Wiring WARNING: Turn off electric power CONTROL WIRING FOR GAS OR OIL FURNACE at the fuse box or service panel before making TYPICAL THERMOSTAT any electrical connections. Also, the ground SUBBASE FOR TYPICAL GAS OR OIL HEAT connection must be completed before making line voltage connections. -
Page 29: Power Wiring
WIRING Control Wiring (cont.) Field wiring must comply with the National Electric Connect power wiring to line-voltage lugs located Code (C.E.C. in Canada) and any applicable local in the outdoor unit electrical box. (See wiring code. diagram attached to unit access panel.) Check all electrical connections, including Power Wiring factory wiring within the unit and make sure all... -
Page 30: 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 31: 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 32: Refrigerant Charge
START-UP Checking Refrigerant Charge Charge for all systems should be checked against Supply airflow must be between 320 and 450 cfm per rated cooling ton prior to adjusting system the Charging Chart inside the access panel cover. charge. If a humidification system is installed, WARNING: The top of the scroll disengage it from operation prior to charge... -
Page 33: Gross Charging By Pressures
START-UP Checking Refrigerant Charge (cont.) With an accurate scale (+/– 1 oz. [28.3 g]) or 2. Note the Outdoor Dry Bulb Temperature, volumetric charging device, adjust charge ODDB° = _____°F [_____°C]. Unit charging is difference between that shown on the unit data recommended under the following outdoor conditions ONLY: plate and that calculated for the new system... -
Page 34: Finishing Up Installation
START-UP Checking Refrigerant Charge (cont.) conditions, add charge. If the measured subcool NOTICE: If the indoor temperature is is above the listed requirement for the given above or below the recommended range, run the outdoor and indoor conditions, remove charge. system to bring the temperature down or run the electric heat/furnace to bring the temperature Finishing Up Installation... -
Page 35: Components And Controls
COMPONENTS AND CONTROLS Compressor Crankcase Heat (CCH)* While scroll compressors usually do not require • When a low ambient control is used for system crankcase heaters, there are instances when a operation below 55°F. heater should be added. Refrigerant migration All heaters are located on the lower half of the during the off cycle can result in a noisy start up. -
Page 36: High- And Low-Pressure Controls (Hpc And Lpc)
COMPONENTS AND CONTROLS High- and Low-Pressure Controls (HPC and LPC) HPC and LPC are not installed on FO****C***A, CAUTION: The compressor has but can be field installed using the followiing an internal overload protector. Under some kit numbers: RXAB-A0z (high pressure control) conditions, it can take up to 2 hours for this and RXAC-A0Z (low pressure control). -
Page 37: Hard-Start Components
ACCESSORIES Time Delay Control WARNING: Turn off electric power at the fuse box or service panel before making (Part No. RXMD-B01) any electrical connections. Also, the ground The time delay control is in the low voltage control connection must be completed before making line circuit. -
Page 38: Diagnostics
DIAGNOSTICS Electrical Checks Flowchart Unit Running? Go to Mechanical Checks for Cooling or Heating Thermostat Problem? Repair and Recheck Transformer Problem? Repair and Recheck Voltage on Compressor Side of Contactor? Voltage on Line Run Capacitor Side of Contactor? Start Capacitor Circuit Breakers or Fuses Open Compressor... -
Page 39: Cooling Mechanical Checks Flowchart
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 40: General Troubleshooting Chart
DIAGNOSTICS General Troubleshooting Chart WARNING: Disconnect all power to unit before servicing. Contactor may break only one side. Failure to shut off power can cause electrical shock resulting in personal injury or death. SYMPTOM POSSIBLE CAUSE REMEDY Unit will not run •... -
Page 41: 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 Foreign matter stopping fl ow High internal load Hot air (attic) entering return Heat source on;... - Page 42 DIAGNOSTICS Service Analyzer Charts COMPRESSOR OVERHEATING (cont.) SYMPTOM POSSIBLE CAUSE CHECK OR REMEDIES Short cycling of Low charge Check system charge. compressor (cont.) Low evaporator airfl ow Dirty coil Dirty fi lter Duct too small or restricted Faulty run capacitor Replace.
- Page 43 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. Add fi lter drier, evacuate, and recharge. High head pressure Noncondensibles air Unusual head and Wrong refrigerant or mixed refrigerants suction readings Foreign matter –...
- Page 44 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 45 DIAGNOSTICS Service Analyzer Charts THERMOSTATIC EXPANSION VALVES (cont.) SYMPTOM POSSIBLE CAUSE REMEDY Refrigerant drainage from fl ooded evaporator Install trap riser to the top of the evaporator coil. Inoperable crankcase heater or crankcase heater Replace or add crankcase heater. Compressor fl ood needed back upon start-up Any of the causes listed under symptoms of...
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Page 46: Cooling Troubleshooting 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] High High High High Overcharge High Undercharge Liquid Restriction High High (Drier) Low Indoor Airfl ow High High High... -
Page 47: Wiring Diagrams
WIRING DIAGRAMS For Single-Phase Models... - Page 48 WIRING DIAGRAMS For Three-Phase Models...