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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.
92-104921-07-06 (4/18) Printed in USA
AIR COOLED
CONDENSING UNITS
INSTALLATION INSTRUCTIONS
RA17 MODEL SERIES – 17 SEER
FEATURING INDUSTRY STANDARD
R-410A REFRIGERANT
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Table of Contents
Troubleshooting
Related Manuals for Rheem RA17 Series
Summary of Contents for Rheem RA17 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 INSTALLATION INSTRUCTIONS TO QUALIFIED, LICENSED SERVICE PERSONNEL FOR PROPER INSTALLATION, ADJUSTMENT, AND OPERATION OF THIS RA17 MODEL SERIES – 17 SEER UNIT.
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Page 2: Table Of Contents
CONTENTS Important Condensing Units ..........23 Safety Information ..........3 Active Compressor Protection Mode ....24 Efficiency Testing Notice ..........3 Test and Fault Recall Modes ........25 General Information ........... 4 Conventional Thermostat Wiring .....30 Checking Product Received ........4 Thermostat Wiring Diagrams ......31 Application ..............4 Electrical and Physical Data .........5 ICC Control Operation ........32... -
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% qualified, licensed service personnel for proper higher pressures (1.6 times) than R-22 systems. Do installation, adjustment, and operation of this not use R-22 service equipment or components on unit. -
Page 4: General Information
GENERAL INFORMATION WARNING: Application Before specifying any air conditioning equipment, Improper installation, or installation not made in a survey of the structure and a heat gain accordance with these instructions, can result calculation must be made. A cooling heat gain calculation determines the amount of heat needed conditions and can cause the related warranty to be removed. -
Page 5: Electrical And Physical Data
GENERAL INFORMATION Electrical and Physical Data - cont. RA17 ELECTRICAL PHYSICAL Fuse or HACR Compressor Outdoor Coil Weight Refrig . Minimum Model Motor Circuit Breaker Circuit Full Face Number Freq Rated Load Locked Roto r Voltage Phase Circuit Shipping Load Area Ampacity Maximum... -
Page 6: Specifications
GENERAL INFORMATION Specifications Proper Installation ALLOW 60" [1524mm] OF ALLOW 60” [1524mm] Proper sizing and installation of this equipment is CLEARANCE OF CLEARANCE critical to achieve optimal performance. Use the information in this Installation Instruction Manual “W” and reference the applicable manufacturer’s specification sheet when installing this product. -
Page 7: 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 8: For Units With Space Limitations
INSTALLATION Choosing a Location (cont.) For Units With Space • If installing a unit on a flat roof, use 4" x 4" [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 9: 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 10: 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 11: Interconnecting Tubing And Fitting Losses
INSTALLATION Interconnecting Tubing (cont.) Interconnecting Tubing and tubing length, ttings, vertical separation, acces- sories, and lter dryers. The table below references Fitting Losses di 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 12: Long Line Set Applications
INSTALLATION Interconnecting Tubing (cont.) A 3-Ton condensing unit is installed 50’ below the ID unit, requires a 5 of 1 2 diameter liquid line, and 4 90° LR elbows. • itting Equivalent Length (ft.) = 4 x .9 = 3.6’ •... -
Page 13: Suction Line Selection
INSTALLATION Interconnecting Tubing (cont.) Suction Line Selection Refrigerant Migration During Off Cycle Purpose of the suction line is to return superheated vapor to the condensing unit from the evaporator. Long line set applications can require a consider- Proper suction line sizing is important because it able amount of additional refrigerant. - Page 14 INSTALLATION Interconnecting Tubing (cont.) For applications that are considered to have a long • apor line should slope toward the indoor unit line set with the outdoor unit and indoor unit on the • ollow the proper line si ing, equivalent length, same level the following is required: charging requirements, and oil level adjustments spelled out in this document and the outdoor...
- Page 15 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 Figure 2 For applications that are considered to have a long •...
- Page 16 Table 2...
- Page 17 Table 3...
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Page 18: Tubing Installation
INSTALLATION Interconnecting Tubing (cont.) Tubing Installation lineset. Commercially available flush kits are not recommended due to the risk of residual Observe the following when installing correctly flushing agent being incompatible with POE oils si ed type refrigerant tubing between the or internal components. -
Page 19: 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 in or twist. Use a good tubing bender on the vapor line to prevent kinking. -
Page 20: 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 21: Condensing Units
INSTALLATION Condensing Units Condensing Units Equipped CAUTION: UNIT MAY START with the EcoNet™ Enabled SUDDENLY AND WITHOUT WARNING. Solid red 2-Stage Control System light indicates a thermostat call for unit operation is present at the ICC control. ICC control will attempt EcoNet™... -
Page 22: Low Volt Fuse
INSTALLATION Condensing Units IMPORTANT: • C – 24VAC Common from the indoor unit 24VAC If the installed system does transformer not meet these requirements, the system must be wired • E – 1-Data: System Communications Line 1 using traditional control wiriing, reference Section 11.7 Conventional 24VAC Thermostat Control Wiring. -
Page 23: Condensing Units
INSTALLATION Condensing Units FIGURE 2 2) Second Stage Cooling Operation – When the TYPICAL ECONET COMMUNICATING SYSTEM™ WIRING DIAGRAM ICC receives a command for second stage cooling operation, an upper case is displayed Communicating Thermostat on the dual 7-segment LEDs. E1 E2 Outdoor Unit Indoor Unit... -
Page 24: Active Compressor Protection Mode
INSTALLATION Active Compressor Protection Mode • The I actively protects the compressor from harmful operation during a fault condition. • hen the I detects a condition that could damage the compressor, the ICC will enter active protection mode and lockout compressor operation. •... -
Page 25: Test And Fault Recall Modes
INSTALLATION Active Compressor Protection Mode command for unit operation is present, TEST mode causes: Active Protection – Code 7 – Compressor open run circuit display If the ICC detects current in the start circuit operate without current present in the run circuit, the ICC will lockout the compressor to keep it from continuing to operate and flash an on the... - Page 26 INSTALLATION Active Compressor Protection Mode Clear Fault History (UP and SELECT Buttons) probes and release. LEDs flash to indicate the history has been cleared. NOTE: The memory card for the system has specific model data for this system. The memory card is attached to the control box with a tether.
- Page 27 INSTALLATION ECONET COMMUNICATION SYSTEM™ CONTROL WIRING CONVENTIONAL THERMOSTAT WIRING ICC DIAGNOSTIC CODES ICC Diagnostic Codes Descriptions of the ICC diagnostic codes are provided below: Dual 7-Segment Status/Possible Cause – Troubleshooting LEDs Display Diagnostic Description Information Code 0 – Standby Normal operation No command for unit operation c - First Stage Cooling Normal operation...
- Page 28 INSTALLATION Dual 7-Segment Status/Possible Cause – Troubleshooting LEDs Display Diagnostic Description Information Code 05 – Open circuit (Compressor will not • Check for damaged, miswired, or wrong run Run) capacitor • The ICC has had a protector trip for longer •...
- Page 29 INSTALLATION Dual 7-Segment Status/Possible Cause – Troubleshooting LEDs Display Diagnostic Description Information Code 29 – High Pressure Control Open • Outdoor coil is dirty (cooling mode) • Outdoor fan is not running (cooling mode) The ICC detects the HPC is open •...
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Page 30: Conventional Thermostat Wiring
INSTALLATION Conventional Thermostat Wiring fault history of the system. This diagnostic information is not available when the unit is using a conventional thermostat. Reference section EcoNet Communication System™ Control Wiring. wires for proper unit operation: R – 24VAC C – 24VAC common TABLE 4 FIELD WIRE SIZE FOR 24 VOLT THERMOSTAT CIRCUITS SOLID COPPER WIRE - AWG. -
Page 31: Thermostat Wiring Diagrams
INSTALLATION Non-communicating Thermostat Wiring Diagrams The following figures show the typical wiring diagrams with (-)HPN air handler and (-)ARL con- WIRE COLOR CODE densing unit. Cooling and heat pump airflows may need to be adjusted for homeowner comfort BK – BLACK G –... -
Page 32: Icc Control Operation
INSTALLATION ICC Control Operation ICC Control Operation with Conventional against short cycling. The dual 7-segment LEDs will flash “c” or “C” while the short cycle timer is active and a Thermostat Wiring call for unit operation is received. Installation Verification Flashing lower case c V AC power on R&C must be present at the ICC for it A call for first stage cooling has been received... - Page 33 INSTALLATION ICC Control Operation IMPORTANT: This mode of active protection must be manually reset. 4) Open Start Circuit Lockout flashing “06” when an open start circ uit condition occurs. Active Protection – Code 21L – Open low pressure control Active Protection – Code 6L – Compressor open start circuit Cooling Mode If the ICC detects current in the run circuit without current present in the start circuit, , the ICC will lockout...
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Page 34: Test And Fault Recall Modes
INSTALLATION Test and Fault Recall Modes Fault Recall Mode (UP and Select Buttons) FAULT RECALL mode by pressing the UP and Select buttons at the same time with insulated probes mode FC will be displayed. FAULT RECALL mode, the ICC will automatically scroll through stored faults on the dual 7-segment LEDs. -
Page 35: Electrical Wiring
INSTALLATION Electrical Wiring Grounding Field wiring must comply with the National Electric Code A grounding lug is provided near the contactor for a ground Power Wiring wire. WARNING: It is important that proper electrical power from a commercial The unit must be permanently utility is available at the condensing unit contactor. -
Page 36: Wiring Diagrams
WIRING Control Wiring WARNING: Turn o 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 37: 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 38: 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 39: 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 40: Checking 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 41: Gross Charging By Pressure
START-UP Checking Refrigerant Charge (cont.) ith an accurate scale 1 o . [2 .3 g] or 2. Note the Outdoor Dry Bulb Temperature, volumetric charging device, adjust charge ODDB° = _____°F [_____ ]. Unit charging is recommended under the following outdoor difference between that shown on the unit data conditions ONLY: plate and that calculated for the new system... -
Page 42: Finishing Up Installation
START-UP Checking Refrigerant Charge (cont.) NOTICE: conditions, add charge. If the measured subcool 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 43: Components And Controls
COMPONENTS AND CONTROLS Compressor Crankcase Heat (CCH) While scroll compressors usually do not require • hen 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 44: Accessories
ACCESSORIES Low Ambient Control (LAC) WARNING: Turn o electric power (Part No. RXAD-A08) at the fuse box or service panel before making any electrical connections. Also, the ground This component senses compressor head connection must be completed before making line pressure and shuts the heat pump fan off when voltage connections. -
Page 45: 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 46: Cooling Mechanical Check 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 47: 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 48: Service Analyzer Charts
DIAGNOSTICS Service Analyzer Charts COMPRESSOR OVERHEATING SYMPTOM POSSIBLE CAUSE High superheat Low charge Check system charge. (greater than 15°F ] at coil Verify suction thermister operation Replace thermistor Verify pressure transducer operation input Replace transducer and/or harness and/or control board and output voltage Faulty metering device (EEV) oreign matter stopping ow. - Page 49 DIAGNOSTICS Service Analyzer Charts COMPRESSOR OVERHEATING (cont.) SYMPTOM POSSIBLE CAUSE CHECK OR REMEDIES Short cycling of Distributor tube Restricted with foreign matter compressor (cont.) Kinked I.D. reduced from previous compressor failure Low charge Check system charge. ow evaporator air ow Dirty coil Dirty lter Duct too small or restricted...
- Page 50 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 lter drier, evacuate, and recharge. High head pressure Noncondensibles air Unusual head and Wrong refrigerant or mixed refrigerants suction readings Foreign matter –...
- Page 51 DIAGNOSTICS Service Analyzer Charts FLOODING SYMPTOM POSSIBLE CAUSE REMEDY Bad pressure reading Check transducer wiring Suction thermistor in wrong location Replace thermistor Poor system control Bad suction thermistor Replace thermistor using an EEV Improper superheat setting less than 5 [-15 Adjust EEV SH setpoint dipswitches and validate valve operation.
- Page 52 DIAGNOSTICS Service Analyzer Charts ELECTRONIC EXPANSION VALVES (cont.) SYMPTOM POSSIBLE CAUSE REMEDY EEV control dc circuit failed Verify 5Vdc to pressure transducer is present, if not, replace EEV controller. High superheat adjustment hange the superheat o set dip switches to increase superheat.
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Page 53: Cooling Troubleshooting Tips
DIAGNOSTICS Service Analyzer Charts ELECTRONIC EXPANSION VALVES (cont.) SYMPTOM POSSIBLE CAUSE REMEDY Oversized EEV Install correct EEV Superheat and Unequal refrigerant ow through evaporator Ensure suction line thermistor is in correct location in a suction pressure circuit clean section of copper pipe. uctuate valve is hunting) Moisture freezing and partially blocking EEV... - Page 54 WIRING DIAGRAMS For Single-Phase Models...
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Page 55: Wiring Diagrams
WIRING DIAGRAMS... - Page 56 NOTES...