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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.
92-104921-12-00 (12/15) Printed in USA
VARIABLE SPEED R-410A
AIR CONDITIONING
OUTDOOR UNITS
(-)A20 (20 SEER) EQUIPPED WITH
ECONET™ COMMUNICATIONS
Enabled
ST-A1226-01-00
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Summary of Contents for EcoNet A2024
- Page 1 ADJUSTMENT, AND OPERATION OF THIS UNIT. READ THESE INSTRUCTIONS THOROUGHLY BEFORE (-)A20 (20 SEER) EQUIPPED WITH ATTEMPTING INSTALLATION OR OPERATION. FAILURE ECONET™ COMMUNICATIONS TO FOLLOW THESE INSTRUCTIONS MAY RESULT IN IMPROPER INSTALLATION, ADJUSTMENT, SERVICE, OR MAINTENANCE POSSIBLY RESULTING IN FIRE, ELECTRICAL SHOCK,...
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Page 2: Table Of Contents
Tubing Connections ���������������������������������������������������21 Communicating 2 Wire Kit ���������������������������������������� 52 Leak Testing ���������������������������������������������������������������22 Diagnostics ������������������������������������������������ 53-73 Wiring ��������������������������������������������������������� 23-26 Replacement of EcoNet™ Variable Speed EcoNet™ Control Communications ���������������������������23 Unitary Control Board ����������������������������������������������� 53 Control Wiring ������������������������������������������������������������23 ICC Diagnostic Codes ������������������������������������������ 54-57 EcoNet™... -
Page 3: 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 conditioner equipment, Improper installation, or installation not made in a survey of the structure and a heat loss and accordance with these instructions, can result heat gain calculation must be made� A heat loss in unsatisfactory operation and/or dangerous calculation involves identifying all surfaces and conditions and can cause the related warranty... -
Page 5: Electrical And Physical Data
Front P age Change the title to align with the title above. Change “(-‐)P17 (17 SEER)” to (-‐)A20 (20 SEER) GENERAL INFORMATION Contents p g 2 Update as needed. Electrical and Physical Data Electrical ... - Page 6 GENERAL INFORMATION R A 20 36 A J V C A MINOR SERIES CONTROLS C - COMMUNICATING TYPE V - INVERTER VOLTAGE J = 1 PH, 208-230/60 MAJOR SERIES CAPACITY 24 = 24000 BTU/HR [7.03 kW] 36 = 36000 BTU/HR [10.55 kW] 48 = 48000 BTU/HR [14.07 kW] 60 = 60000 BTU/HR [17.58 kW] 20 SEER...
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Page 7: Specifications
Nameplate Oil • OUTDOOR UNIT information in this Installation Instruction Manual Charge (oz) • INDOOR COIL and reference the applicable manufacturer’s (-‐)A2024 specification sheet when installing this product� • INDOOR AIR HANDLER/FURNACE ZPV0212E-‐ZE9-‐130 40 (-‐)A2036 ... -
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
INSTALLATION Choosing a Location (cont�) For Units With Space • If elevating 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 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 Fort Wayne International Falls Clayton Erie Lynchburg ARIZONA 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 tubing length, fittings, vertical separation, acces- sories, and filter dryers. The table below references Fitting Losses different 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 14: Long Line Set Applications
Long line set applications are defined as applica- Charge (oz) tions that require accessories or alternate construc- tion methods� The following are special consider- (-‐)A2024 ations that need to be addressed when installing a ZPV0212E-‐ZE9-‐130 40 ... -
Page 15: 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- in cooling mode� While in heating mode the suction able amount of additional refrigerant�... - Page 16 INSTALLATION Interconnecting Tubing (cont�) For applications that are considered to have a long • Vapor line should slope toward the indoor unit line set with the outdoor unit and indoor unit on the • Follow the proper line sizing, equivalent length, same level the following is required: charging requirements, and oil level adjustments spelled out in this document and the outdoor...
- Page 17 INSTALLATION Interconnecting Tubing (cont�) Outdoor Unit Above Indoor Unit Outdoor Unit Above Indoor Unit Insulated liquid and Reference Table 2 suc on line for eleva on limita ons Verify sub-cooling prior to thro ling device TXV or EEV at indoor evaporator Figure 5 For applications that are considered to have a long...
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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 pages 18 and 19 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�) The three stage inverter driven air conditioners are equipped with OD EXVs and matched to ID units that are also equipped with EXVs� During shipment, vibration has been found to move the EXV stem valve to a near closed position despite being set to a fully open position in the factory�... -
Page 23: Wiring
• EcoNet™ communicating air conditioner or EcoNet™ Control EcoNet™ communicating condensing unit� Communications • EcoNet™ communicating air handler or The EcoNet™ enabled (-)A20 series of air EcoNet™ communicating furnace� conditioners are designed to operate with • EcoNet™ control center� conventional 24VAC Thermostat or an EcoNet™... -
Page 24: Conventional 24Vac Thermostat Control Wiring
IMPORTANT: The preferred method BK – BLACK GY – GRAY W – WHITE of unit installation and operation is by the EcoNet™ BR – BROWN O – ORANGE Y – YELLOW Communicating System, which allows access to BL – BLUE PR –... -
Page 25: Power Wiring
WIRING Control Wiring (cont�) TYPICAL 2-STAGE THERMOSTAT: AIR CONDITIONER TYPICAL 2-STAGE THERMOSTAT: AIR CONDITIONER WITH ELECTRIC HEAT AND FURNACE Typical Two-Stage Thermostat Typical (-)A20 Two-Stage Y1 Y2 W2 C R DHM (-)HMV Air Conditioner Furnace Thermostat Outdoor Unit Air Handler Control w/vs Blower Motor (-)A20... -
Page 26: Grounding
WIRING Control Wiring (cont�) Grounding Power wiring must be run in a rain-tight conduit� WARNING: The unit must be Conduit must be run through the connector panel permanently grounded� Failure to do so can cause below the access cover (see page 6) and attached electrical shock resulting in severe personal injury or to the bottom of the control box�... -
Page 27: Start-Up
START-UP Start-Up low voltage to the system� When all devices are powered, the thermostat should detect the indoor and outdoor units within 45 seconds� 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�... -
Page 28: Evacuation Procedure
START-UP Evacuation and Leak Testing SENSIBLE HEAT SENSIBLE HEAT ALTITUDE ALTITUDE CONSTANT CONSTANT (FEET) (FEET) (SHC) (SHC) Sea Level 1�08 6000 0�87 1�07 7000 0�84 1�05 8000 0�81 1000 2000 1�01 9000 0�78 3000 0�97 10000 0�75 • After adequate evacuation, open both service 4000 0�94 15000... -
Page 29: Checking Refrigerant Charge
START-UP Checking Refrigerant Charge Charge for all systems should be checked against Confirm ID Airflow and Coils 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 30: Setting Compressor Speed
START-UP Checking Refrigerant Charge (cont�) With an accurate scale (+/– 1 oz. [28.3 g]) or IMPORTANT: volumetric charging device, adjust charge It is necessary to make difference between that shown on the unit data sure the ID unit is receiving a high stage operation plate and that calculated for the new system call (Y + Y2) from the thermostat before entering installation�... -
Page 31: Final Charge By Subcooling
START-UP Checking Refrigerant Charge (cont�) to bring the temperature within this range� System Cooling Mode ONLY: 55°F [12.8°C] outdoor dry pressure values provided in the Charging Chart for bulb and above outdoor dry bulbs corresponding to conditions outside NOTICE: If the indoor temperature is of these ranges are provided as reference ONLY�... - Page 32 START-UP Checking Refrigerant Charge (cont�) IMPORTANT: • Configure indoor thermostat per the thermostat Excessive use of installation instructions and set thermostat to elbows in the refrigerant line set can produce desired mode and temperature� excessive pressure drop� Follow industry NOTICE: best practices for installation�...
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Page 33: Components And Controls
Display the appropriate error code on the dual 420 PSIG� seven segment LED and send an error status The (-)A20 EcoNet™ enabled variable speed to the control center when operating with the air conditioners are equipped with a pressure EcoNet™ control center�... -
Page 34: Accumulator
COMPONENTS AND CONTROLS High- and Low-Pressure Controls (HPC and LPC) (cont�) • If a demand persists after the delay but the communicate the lockout fault to the EcoNet™ suction pressure has not recovered, the control center when used in communicating outdoor fan will be turned off�... -
Page 35: Alternate Suction Line Thermistor
COMPONENTS AND CONTROLS Alternate Section Line Thermistor (OST) IMPORTANT: The EcoNet™ enabled (-)A20 variable speed air The clamp on the vapor conditioners are equipped with a suction line line thermistor securely attaches to the alternate thermistor for the purposes of measuring suction suction line at the 10 to 2 o’clock position with a... -
Page 36: Suction Pressure Transducer (Spt)
COMPONENTS AND CONTROLS Suction Pressure Transducer (SPT) The EcoNet™ enabled (-)A20 variable speed air conditioners are equipped with a 5vdc powered suction line pressure transducer� This device has an internal diaphragm that changes the resistance in line with the input voltage to return a modified voltage that is scalled from 0�5 to 4�5vdc�... -
Page 37: Choke/Inductor
COMPONENTS AND CONTROLS Power Inverter Compressor Controls (cont�) the power inverter will continually attempt to raise 4� High Pressure control connection (HPS) – with the compressor speed to maximize performance automatic reset and conditioned space comfort� 5� Discharge line thermistor connection (Sensor) 1. -
Page 38: Unitary Control
COMPONENTS AND CONTROLS EcoNet™ Variable Speed Unitary Control The EcoNet™ system is the next generation of 17� Dual seven segment LED – Displays status, the integrated compressor control (ICC) and is diagnostic codes, fault recall, compressor an integral part of the EcoNet™ communication speed, superheat, and defrost menus network�... -
Page 39: Memory Card
COMPONENTS AND CONTROLS EcoNet™ Variable Speed Unitary Control (cont�) Memory Card • The memory card stores all unit information. • The unit information is called model data. • The model data is all the information needed for proper unit operation�... -
Page 40: Compressor Operation
2) High-Stage Cooling Operation – When the Compressor Operation ICC receives a call for second-stage cooling The (-)A20 series of EcoNet™ compatible outdoor operation, an upper-case “C” is displayed on air conditioners are equipped with legacy and the dual 7-segment LEDs�... - Page 41 COMPONENTS AND CONTROLS EcoNet™ Variable Speed Unitary Control (cont�) unit model data� The magnitude of instantaneous to utilize a pulse width modulated signal from the compressor speed change will depend on PWM terminal to control the outdoor fan motor� the change in building load measured by the This output is a 80Hz pulse-width-modulated control center�...
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Page 42: Active Compressor Protection Mode
COMPONENTS AND CONTROLS EcoNet™ Variable Speed Unitary Control (cont�) the outdoor temperature is below 55°F� When fault� Depressing the TEST button will force the necessary, the outdoor fan is cycled off to control back to the main menu� maintain condensing pressure and temperature in CS = Compressor Speed –... - Page 43 COMPONENTS AND CONTROLS EcoNet™ Variable Speed Unitary Control (cont�) fault occurs 3 times in one hour the ICC will lock 15- Compressor Overcurrent– T901_O Inverter out the compressor to keep it from continuing to Fault operate for one hour and flash an ”L” on the dual If the inverter detects an output overcurrent 7-segment LEDs followed by a 15�...
- Page 44 COMPONENTS AND CONTROLS EcoNet™ Variable Speed Unitary Control (cont�) delay after this fault occurs before ICC will restart the compressor� If this fault occurs 3 times during a single call for operation the ICC will lock out the compressor to keep it from continuing to operate and flash an ”L”...
- Page 45 COMPONENTS AND CONTROLS EcoNet™ Variable Speed Unitary Control (cont�) L15 – PFC & IGBT Temperature High – T918_O Inverter Fault If the inverter identifies a high insulated-gate bipolar transistor (IGBT) temperature or power factor correction (PFC)circuit temperature reading the inverter will automatically shut the compressor off and keep it from operation�...
- Page 46 COMPONENTS AND CONTROLS EcoNet™ Variable Speed Unitary Control (cont�) compressor to keep it from continuing to operate L16 – Discharge Temperature – T916_O Inverter and flash an ”L” on the dual 7-segment LEDs Fault followed by a 16� If the ICC detects the compressor discharge temperature is greater 235°F the ICC will...
- Page 47 COMPONENTS AND CONTROLS EcoNet™ Variable Speed Unitary Control (cont�) IMPORTANT: L21 – Low Pressure Refrigerant – A/T 021_0 This mode of active Low Refrigerant Pressure protection is automatically reset� • The ICC will display a flashing “21” followed by a flashing “L”...
- Page 48 COMPONENTS AND CONTROLS EcoNet™ Variable Speed Unitary Control (cont�) 35- Suction Temperature Thermistor Failure – A102_O If the ICC identifies an issue with Outdoor Suction Thermistor (OST) sensor the ICC will flash a 35 on the dual 7-segment LEDs� IMPORTANT:...
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Page 49: Default Operations Upon Component Failure
COMPONENTS AND CONTROLS EcoNet™ Variable Speed Unitary Control (cont�) Test and Fault Recall Modes Test Mode (Test Button on the ICC) • Enter TEST mode by pressing the TEST button with an insulated probe for one (1) second and Exiting Active Compressor Protection Lockout release�... -
Page 50: Agency Test Mode Instructions
COMPONENTS AND CONTROLS EcoNet™ Variable Speed Unitary Control (cont�) 3� Once the compressor has started depress the SW2 and TEST buttons together for 5-8 2) The compressor will start and the outdoor fan seconds� will operate� 4� After this time the dual seven segment LEDs 3) The display will change to a steady “c”... - Page 51 COMPONENTS AND CONTROLS EcoNet™ Variable Speed Unitary Control (cont�) 6� To enter this menu, depress the SW2 button 2� Allow the 5min delay to expire and for the once� compressor to start� 7� The LED display should now show a value of 3�...
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Page 52: Accessories
ACCESSORIES Communicating 2-Wire Kit WARNING: Turn off electric power (Part No. RXME-A02) at the fuse box or service panel for at least 1 minute before making any electrical connections� This kit allows the outdoor unit to operate with Also, the ground connection must be completed only 2 control wires�... -
Page 53: Diagnostics
ICC (Integrated Compressor Control) provide status and diagnostic information that Control Board greatly enhances the ability to quickly diagnose Each control board in the EcoNet™ system faults� Use the following troubleshooting Communication Network needs information guides as another tool in system diagnostics�... -
Page 54: Icc Diagnostic Codes
DIAGNOSTICS ICC Diagnostic Codes Descriptions of the ICC diagnostic codes are provided below: NOTE: Codes must be read from correct side to avoid an error in reading codes� Dual 7-Segment Status/Possible Cause – LEDs Display Diagnostic Description Troubleshooting Information Code c –... - Page 55 DIAGNOSTICS Dual 7-Segment Status/Possible Cause – LEDs Display Diagnostic Description Troubleshooting Information Code • Power cycle the system. Verify all lights on the L16 – A912, A913, A919, A920, A921, & A929 • inverter are out prior to returning power to the Inverter Fault •...
- Page 56 DIAGNOSTICS Dual 7-Segment Status/Possible Cause – LEDs Display Diagnostic Description Troubleshooting Information Code 27 – AC Input Under Voltage – • Check incoming line voltage to the disconnect and unit. A907 Inverter Fault • Check wiring connections. 28 – AC Input Over Voltage – •...
- Page 57 DIAGNOSTICS Dual 7-Segment Status/Possible Cause – LEDs Display Diagnostic Description Troubleshooting Information Code L36 – Suction Pressure Sensor Failure – • Check pressure transducer wiring harness for • continuity while attached to sensor. A956 • Check 5Vdc is constant between black and red •...
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Page 58: Electrical, Mechanical Checks Flowcharts
DIAGNOSTICS Electrical Checks Flowchart THERMOSTAT CALL FOR COOLING, NO COOLING Refer to the ICC Diagnostics Codes section from this Outdoor Unit manual for fault code troubleshooting. Running Check fault history for other faults. 7-Segment Check control voltage (R and C) to control. Check transformer Display Lit? Check 3A fuse on... - Page 59 DIAGNOSTICS Cooling Mechanical Checks Flowchart Outdoor Unit Running? Go to Electrical Checks Flowchart Pressure Problems? High Head Pressure or Low Liquid Low Suction Compressor Envelope Pressure Pressure Protection Low on Dirty Filters Charge Dirty Outdoor Coil Low Ambient Dirty Indoor Coil Inoperative Outdoor Temperature Inadequate Indoor...
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Page 60: General Troubleshooting Chart
DIAGNOSTICS General Troubleshooting Chart WARNING: Disconnect all power to side� Failure to shut off power can cause electrical unit before servicing� Contactor may break only one shock resulting in personal injury or death� SYMPTOM POSSIBLE CAUSE REMEDY Unit will not run •... -
Page 61: Service Analyzer Charts
DIAGNOSTICS Service Analyzer Charts COMPRESSOR OVERHEATING – HIGH DISCHARGE TEMP SYMPTOM POSSIBLE CAUSE CHECK/REMEDY High superheat Low charge Check system charge. (greater than 15°F [-9°C] at coil) Verify suction thermistor operation (10k thermistor) Replace thermistor. Verify pressure transducer operation input and Replace thermistor and/or harness and/or control output voltage board. - Page 62 DIAGNOSTICS Service Analyzer Charts COMPRESSOR OVERHEATING – HIGH DISCHARGE TEMP (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 internal overload Replace compressor. ELECTRICAL SYMPTOM POSSIBLE CAUSE CHECK OR REMEDIES...
- Page 63 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 64 DIAGNOSTICS Service Analyzer Charts FLOODING SYMPTOM POSSIBLE CAUSE REMEDY Bad pressure reading Check transducer wiring. Suction thermistor in wrong location Relocate thermistor. Poor system control using an EXV Bad suction thermistor Replace thermistor. Improper superheat setting (less than 5°F [-15°C]) Adjust EXV SH setpoint dipswitches and validate valve operation.
- Page 65 DIAGNOSTICS Service Analyzer Charts ELECTRONIC EXPANSION VALVES (INDOOR VALVE) (cont.) SYMPTOM POSSIBLE CAUSE REMEDY EXV control dc circuit failed Verify 5Vdc to pressure transducer is present. If not, replace EXV controller. High superheat adjustment Change the superheat offset dip switches to increase superheat.
- Page 66 DIAGNOSTICS Service Analyzer Charts ELECTRONIC EXPANSION VALVES (INDOOR VALVE) (cont.) SYMPTOM POSSIBLE CAUSE REMEDY Unequal evaporator circuit loading Ensure airflow is equally distributed through Superheat is low evaporator. to normal with low suction pressure Check for blocked distributor tubes. Low load or airflow entering evaporator coil Ensure blower is moving proper air CFM.
- Page 67 DIAGNOSTICS COOLING MODE TROUBLESHOOTING TIPS INDICATORS SYSTEM DISCHARGE SUCTION SUPERHEAT SUBCOOLING COMPRESSOR PROBLEM Normal: 5°–15°F Normal: See PRESSURE PRESSURE AMPS [-15° – -9°C] Charging Chart High High High High Overcharge High Undercharge Liquid Restriction High High (Drier) Low Indoor Airflow High High High...
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Page 68: Wiring Diagram
WIRING DIAGRAM UTIL UTIL 2 CM 1215...
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