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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.
92-104921-07-11 ( /
) Printed in USA
AIR COOLED
CONDENSING UNITS
INSTALLATION INSTRUCTIONS
(-)A17 MODEL SERIES - 17 SEER
EQUIPPED WITH ECONET
FEATURING INDUSTRY STANDARD
R410-A REFRIGERANT
COMMUNICATIONS
TM
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Related Manuals for Rheem A17 Series
Summary of Contents for Rheem A17 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 UNIT. (-)A17 MODEL SERIES - 17 SEER READ THESE INSTRUCTIONS THOROUGHLY BEFORE EQUIPPED WITH ECONET...
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Page 2: Table Of Contents
CONTENTS 1.0 IMPORTANT SAFETY INFORMATION ............3 5.0 SYSTEM START-UP AND REFRIGERANT CHARGING ......25-28 2.0 GENERAL INFORMATION ..............4-5 5.1 System Start-Up Overview ..............25 5.2 Initial Power Up and EcoNet Communication Verification ......25 2.1 Introduction ..................4 2.2 Agency Performance Audit Testing Notice ..........4 5.3 EcoNet Control Center Set-Up ............25 2.3 Importance of a Quality Installation ............4... -
Page 3: Important Safety Information
1.0 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 not use R-22 service equipment or components on installation, adjustment, and operation of this R-410A equipment. -
Page 4: General Information
2.1 Introduction unit installation manual, and the thermostat installation manual are key to a quality installation. The (-)A17 series condensing units are specifically Read the entire instruction manuals before starting designed to operate with matching communicating the installation. -
Page 5: Importance Of Proper Indoor/Outdoor Match-Ups
2.0 GENERAL INFORMATION These factors must be considered before selecting an To assure many years of reliable operation and air conditioning system. The Air Conditioning optimum customer comfort and to assure the Contractors of America (ACCA) Manual J method of outdoor unit warranty remains valid, an air-handler load calculation is one recognized procedure for model or indoor coil/furnace combination should... -
Page 6: Electrical And Physical Data
3.0 UNIT SPECIFICATIONS 3.2 Electrical and Physical Data (-)A17 ELECTRICAL PHYSICAL Fuse or HACR Compressor Outdoor Coil Weight Circuit Breaker Refrig. Model Minimum Motor Circuit Number Voltage Phase Freq Rated Locked Full Load Circuit Face Area Ampacity Load Rotor Amperes Maximum Minimum (oz.) -
Page 7: 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 hoses, and the like must have design pressure ratings appropriate for R-410A. -
Page 8: Choosing A Location
4.0 INSTALLATION 4.2 Choosing a Location 4.2.1 Allowable Clearances 4.2.2 Operational Issues Related to Unit Location 12” to side intake louvers 24” to service access panels IMPORTANT: 60” vertical for fan discharge Locate the unit in a manner that will not prevent, impair, or If space limitations exist, the following clearances compromise the performance of other equipment will have minimal impact to capacity and efficiency... -
Page 9: Corrosive Environments
4.0 INSTALLATION 4.2 Choosing a Location (cont.) 4.3 Unit Mounting 4.2.3 Corrosive Environment The metal parts of this unit may be subject to 4.3.1 Unit Mounting Methods rust or deterioration if exposed to a corrosive environment. This oxidation could shorten the The outdoor unit may be mounted in a number of equipment’s useful life. -
Page 10: Elevating Unit
4.0 INSTALLATION NOTICE: 4.3.3 Elevating Unit DO NOT block drain openings on bottom of unit. WARNING: Secure an elevated unit and If unit must be elevated, secure unit and elevating its elevating stand in order to prevent tipping. Failure to stand such that unit and/or stand will not tip over do so may result in severe personal injury or death. -
Page 11: Liquid Line Selection
4.0 INSTALLATION 4.4.3 Liquid Line Selection The purpose of the liquid line is to transport warm • Measure the total amount of vertical separation be- sub-cooled liquid refrigerant between the outdoor tween the outdoor unit and indoor coil. unit to the indoor unit. It is important not to allow the •... - Page 12 4.0 INSTALLATION Table 2A: Refrigerant Line Sizing Chart (English Units) 17 SEER 2-Stage Air-Conditioners Use Long Line Outdoor Unit ABOVE or BELOW Indoor Unit Guidelines for Allowable Allowable Linear Line Equivalent Length (Feet) Unit Size Liquid Line Vapor Line Lengths <...
- Page 13 4.0 INSTALLATION Table 2B: Refrigerant Line Sizing Chart (Metric Units) 17 SEER 2-Stage Air-Conditioners Use Long Line Outdoor Unit ABOVE or BELOW Indoor Unit Guidelines for Allowable Allowable Linear Line Equivalent Length (Meters) Liquid Line Vapor Line Unit Size Lengths Size Size <...
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Page 14: Long Line Length Considerations
4.0 INSTALLATION 4.4 Refrigerant Line Set Selection (cont.) 4.4.5 Long Line Set 4.5.5.3 Refrigerant Migration During Off Cycle Considerations Long line set applications are defined as Long line set applications can require a consider- applications that require accessories or alternate able amount of additional refrigerant. -
Page 15: Compressor Oil Level Adjustment
4.0 INSTALLATION 4.4 Refrigerant Line Set Selection (cont.) 4.4.5.6 Compressor Oil Level 4.4.5.7 Capacity Losses Adjustment for Long Line Set Long line lengths can result in a reduction in capacity Applications due to vapor line pressure drop and heat gain or loss. Refer to Table 2 for capacity loss multipliers for vari- Additional oil may need to be added for long line set ous vapor line diameters and lengths. -
Page 16: Line Set Installation
4.0 INSTALLATION 4.5 Line Set Installation • Blow out the liquid and suction lines with dry nitro- • If tubing is to be run underground, it must be run in a sealed watertight chase. gen before connecting to the outdoor unit and indoor •... -
Page 17: Relative Location Of Indoor And Outdoor Units
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 OUTDOOR UNIT LEVEL OR NEAR LEVEL TO INDOOR SECTION LINE SET REFERENCE TABLE 2 FOR MAXIMUM LENGTH LIMITATIONS IDEALLY, LINE SET SLOPES AWAY FROM OUTDOOR. -
Page 18: Outdoor Unit Below Indoor Unit
4.0 INSTALLATION 4.5 Line Set Installation (cont.) 4.5.2.2 Outdoor Unit Below Indoor Unit OUTDOOR UNIT BELOW INDOOR SECTION LINE SET Figure 4 For applications that are considered to have a long • Insulated liquid line in unconditioned space only. line set with the outdoor unit below the indoor unit •... -
Page 19: Outdoor Unit Above Indoor Unit
4.0 INSTALLATION 4.5 Line Set Installation (cont.) 4.5.2.3 Outdoor Unit Above Indoor Unit OUTDOOR UNIT ABOVE INDOOR SECTION LINE SET For applications that are considered to have a long • Insulated liquid line in unconditioned space only. line set with the outdoor unit above the indoor unit •... -
Page 20: Tubing Connections
4.0 INSTALLATION 4.5.3 Tubing Connections Indoor coils have only a holding charge of dry nitrogen. Keep all tube ends sealed until connections are to be made. • Use type “L” copper refrigeration tubing. Braze the connections with the following alloys: –... -
Page 21: Initial Leak Testing
4.0 INSTALLATION 4.6 Initial Leak testing • The suction line must be insulated for its entire length to prevent dripping (sweating) and prevent performance losses. Closed-cell foam insulation Indoor coils have only a holding charge of dry such as Armaflex and Rubatex are satisfactory nitrogen. -
Page 22: Final Leak Testing
4.0 INSTALLATION 4.9.1EcoNet Communications ™ The EcoNet enabled (-)A17 Series condensing units ™ are specifically designed to be matched with and EcoNet enabled air-handler or gas furnace and the ™ EcoNet Control Center. While they are also designed ™ to be controlled by a conventional 24VAC 2-stage ther- mostat, many features and benefits are lost. -
Page 23: Conventional 24Vac Thermostat Control Wiring Connections
DO NOT use phone cord to connect indoor Connections and outdoor units. This will damage the controls. The (-)A17 series condensing units allow the installer The EcoNet™ control system requires four (4) control to use conventional 24 VAC control wiring and a wires for unit operation: conventional 2-stage thermostat. -
Page 24: Power Wiring
4.0 INSTALLATION 4.9 Control Wiring (cont.) 4.10 Power Wiring 4.10 Power Wiring TYPICAL 2-STAGE THERMOSTAT: AIR CONDITIONER WITH ELECTRIC HEAT It is important that proper electrical power from a Typical Two-Stage Thermostat with Dehumidification commercial utility is available at the outdoor unit Y1 Y2 W2 C R DHM... -
Page 25: Grounding
4.11 Grounding WARNING: The unit must be permanently grounded. Failure to do so can cause electrical shock resulting in severe personal injury or death. A grounding lug is provided near the line-voltage power entrance for a ground wire as shown in the above illustration. -
Page 26: Indoor Air-Flow Verification
5.0 SYSTEM START-UP AND REFRIGERANT CHARGING 5.5 Indoor Air-Flow 5.6 Refrigerant Charging Verification The refrigerant charge for all systems should be Correct indoor air-flow and proper supply air distri- checked against the Charging Chart located inside the bution is critical to system comfort, efficiency and access panel cover. -
Page 27: Measurement Device Set-Up
5.0 SYSTEM START-UP AND REFRIGERANT CHARGING 5.6.1 Measurement Device IMPORTANT: Charging by weight is Set-Up not always accurate since the application can affect the optimum refrigerant charge. Charging by weight is considered a starting point ONLY. Always check 1. With an R-410A gauge set, attach the high- the charge by using the Charging Chart and adjust as pressure hose to the access fitting on the liquid necessary. -
Page 28: Final Charging By Liquid Subcooling
5.0 SYSTEM START-UP AND REFRIGERANT CHARGING NOTICE: NOTICE: The refrigerant pressures If the indoor temperature is provided are for preliminary charge check ONLY. above or below the recommended range, run the These pressure values are typical, but may vary due system to bring the temperature down or run the to application. -
Page 29: Sequence Of Operation
6.0 SEQUENCE OF OPERATION 6.1 Cooling Mode 6.2 On-Demand Cooling Dehumidification When the EcoNet Control Center or 2-stage conventional 24VAC thermostat calls for the 1st stage The EcoNet Control Center can be configured for of cooling, the outdoor fan motor is energized and the On-Demand Dehumidification for applications with an 1st stage of the compressor and indoor blower mo- EcoNet... -
Page 30: Econet Tm 2-Stage Outdoor Control (Tsodc)
7.5 EcoNet 2-Stage Outdoor Control (TSODC) 7.5 EcoNet 2-Stage Out- • Displays status and diagnostic codes (see Status and Diagnostic Description) door Control • Displays diagnostic/fault recall (see section 10.1) All models are equipped with a EcoNet enabled CAUTION: UNIT MAY START 2-Stage Outdoor Control (TSODC) that interfaces with SUDDENLY AND WITHOUT WARNING. -
Page 31: Overview Of Tsodc Operation
7.0 COMPONENTS & CONTROLS 7.5 EcoNet 2-Stage Outdoor Control (TSODC) (cont.) • C- 24VAC Common from the indoor unit 24VAC Command for Compressor Operation transformer • The control has an on/off fan delay of one (1) second • E- 1 Data: System Communications Line 1 for each stage of cooling. -
Page 32: Control Board Replacement
7.0 COMPONENTS & CONTROLS 7.5 EcoNet 2-Stage Outdoor Control (TSODC) (cont.) 7.5.3 Control Board 30 Second Minimum Run Time • The control has a built in minimum unit run time. If Replacement a command for compressor operation is received and the command is removed within 30 seconds, Each control board in the EcoNet™... -
Page 33: Outdoor Ambient Temperature Thermistor
7.0 COMPONENTS & CONTROLS 7.7 Outdoor Ambient 7.9 Outdoor Fan Motor Temperature Sensor 2, 4, and 5 ton models feature single speed ECM outdoor fan motors that operates at a speed deter- The outdoor ambient temperature is sensed by a mined by a PWM signal from the 2-stage outdoor thermistor located directly underneath the control control. -
Page 34: Accessories
9.0 ACCESSORIES 9.2 Hard Start Kit WARNING: Turn off electric power (Part. No. SK-A1) at the fuse box or service panel before making any electrical connections while installing accessories. Start components are not usually required with the Failure to do so can result in electrical shock, severe scroll compressor used in (-)A17 condensing units, personal injury, or death. -
Page 35: Diagnostics And Troubleshooting
10.0 DIAGNOSTICS AND TROUBLESHOOTING 10.1.2 Fault Recall Mode 10.1 Test and Fault • Enter FAULT RECALL mode by pressing the UP Recall Modes and SELECT buttons at the same time with insulated probes for five (5) seconds and release. 10.1.1 Test Mode (Test Button on •... -
Page 36: Status And Diagnostic Codes
10.0 DIAGNOSTICS AND TROUBLESHOOTING 10.2 Status and Diagnostic Codes Descriptions of the EcoNet 2-Stage Control diagnostic codes are provided below: Dual 7-Segment Status/Possible Cause - Trouble- LEDs Display Diagnostic Description shooting Information Code 0 - Standby Normal Operation No command for unit operation c - First Stage Cooling Normal Operation Unit has received a command for first stage cool-... - Page 37 10.0 DIAGNOSTICS AND TROUBLESHOOTING 10.2 Status and Diagnostic Codes (cont.) Descriptions of the EcoNet 2-Stage Control diagnostic codes are provided below: Dual 7-Segment Status/Possible Cause - Trouble- LEDs Display Diagnostic Description shooting Information Code 5L - Active Protection Protector Trip •...
- Page 38 10.0 DIAGNOSTICS AND TROUBLESHOOTING 10.2 Status and Diagnostic Codes Descriptions of the EcoNet 2-Stage Control diagnostic codes are provided below: Dual 7-Segment Status/Possible Cause - Trouble- LEDs Display Diagnostic Description shooting Information Code 29 - High Pressure Control Open • Outdoor coil is dirty (cooling mode) The Outdoor Control detects the HPC is open •...
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Page 39: Electrical Checks Flowchart
10.0 DIAGNOSTICS AND TROUBLESHOOTING 10.3 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... -
Page 40: Cooling Mechanical Checks Flowchart
10.0 DIAGNOSTICS AND TROUBLESHOOTING 10.4 Cooling Mechanical Checks Flowchart Outdoor Unit Running? Goto 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... -
Page 41: Checking Temperature Sensors
9.0 DIAGNOSTICS & TROUBLESHOOTING 10.5 Checking Temperature Sensors TEMPERATURE SENSORS: The outdoor temperature sensor/thermistor uses a Apply resistance measurements to the chart found scale of 10,000 Ohms at 77ºF (25ºC). This means, below and compare to the control. a sensor exposed to 77ºF will show a resistance 32º... -
Page 42: General Troubleshooting Guide
10.0 DIAGNOSTICS AND TROUBLESHOOTING 10.6 General Troubleshooting Guide 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 per- sonal injury or death. SYMPTOM POSSIBLE CAUSE REMEDY •... -
Page 43: Service Analyzer Charts
10.0 DIAGNOSTICS AND TROUBLESHOOTING 10.7 Service Analyzer Chart (cont.) COMPRESSOR OVERHEATING SYMPTOM POSSIBLE CAUSE CHECK/REMEDY Low charge Check system charge Verify suction thermistor operation Replace thermistor Verify pressure transducer operation input and Replace transducer and/or harness and/or control board output voltage Faulty metering device (EXV or TXV) Foreign matter stopping flow. - Page 44 10.0 DIAGNOSTICS AND TROUBLESHOOTING 10.7 Service Analyzer Chart (cont.) COMPRESSOR OVERHEATING (Cont.) SYMPTOM POSSIBLE CAUSE CHECK OR REMEDIES Distributor tube Restricted with foreign matter Kinked I.D. reduced from previous compressor failure Low charge Check system charge Short cycling of Low evaporator airflow Dirty coil compressor (cont.) Dirty filter...
- Page 45 10.0 DIAGNOSTICS & TROUBLESHOOTING 10.7 Service Analyzer Chart (cont.) CONTAMINATION SYMPTOM POSSIBLE CAUSE CHECK/REMEDY Moisture Poor evacuation on installation or during service High head pressure Noncondensibles air Unusual head and Wrong refrigerant or mixed refrigerants suction readings Foreign matter - copper Copper tubing cuttings In each case, the cure is the same.
- Page 46 10.0 DIAGNOSTICS AND TROUBLESHOOTING 10.7 Service Analyzer Chart (cont.) FLOODING SYMPTOM POSSIBLE CAUSE CHECK OR REMEDIES Bad pressure reading Check pressure transducer wiring. Replace bad trans- ducer or wire harness Suction thermistor in wrong location Relocate thermistor Poor system con- trol using an EXV Bad suction thermistor Replace thermistor...
- Page 47 10.0 DIAGNOSTICS AND TROUBLESHOOTING 10.7 Service Analyzer Chart (cont.) ELECTRONIC EXPANSION VALVES SYMPTOM POSSIBLE CAUSE CHECK OR REMEDIES 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 Moisture causing valve to stick open Recover refrigerant, replace filter-drier, evacuate system...
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Page 48: Troubleshooting Tips
10.0 DIAGNOSTICS AND TROUBLESHOOTING 10.7 Service Analyzer Chart (cont.) FLOODING SYMPTOM POSSIBLE CAUSE CHECK OR REMEDIES Oversized EXV Install correct EXV Superheat and Unequal refrigerant flow through evaporator circuit Ensure suction line thermistor is in correct location in a suction pressure clean section of copper pipe fluctuate (EXV is Moisture freezing and partially blocking EXV... -
Page 49: Outdoor Unit Maintenance
11.0 OUTDOOR UNIT MAINTENANCE 11.1 Outdoor Coil Cleaning The outdoor fan draws air across the coil during an angle. Washing from the top of the coil down operation which results in contaminants collecting from the inside out is the most effective method of on and between the aluminum fins. -
Page 50: Wiring Diagrams
12.0 WIRING DIAGRAM 12.1: 2, 4 and 5 Ton Models - ECM Fan Motor... -
Page 51: Ton Model - Psc Fan Motor
12.0 WIRING DIAGRAM 12.2: 3 Ton Models - PSC Fan Motor...
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