Table of Contents
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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.
92-104921-01-01 (11/14) Printed in USA
AIR COOLED
CONDENSING UNITS
INSTALLATION INSTRUCTIONS
RA14 MODEL SERIES – 14 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 i
e n
d l
d l y
y r
ST-A1226-01-00
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Table of Contents
Related Manuals for Rheem RA1460AJ1NA
Summary of Contents for Rheem RA1460AJ1NA
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Page 1: Condensing Units
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 UNIT. READ THESE INSTRUCTIONS RA14 MODEL SERIES –... -
Page 2: Table Of Contents
CONTENTS Important Start-Up ������������������������������������������������������23–27 Start-Up ����������������������������������������������������������������������23 Safety Information ��������������������������������������������� 3 Checking Airflow ��������������������������������������������������������23 General Information ���������������������������������������� 4-6 Evacuation Procedure ����������������������������������������������� 24 Checking Product Received ����������������������������������������4 Final Leak Testing �������������������������������������������������������24 Application �������������������������������������������������������������������4 Electrical and Physical Data �����������������������������������������5 Checking Specifications ���������������������������������������������������������������6 Refrigerant Charge �������������������������������������� 25-27 Proper Installation ��������������������������������������������������������6 Charging Units With R-410A Refrigerant ��������������������������������������������... -
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 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 in unsatisfactory operation and/or dangerous calculation determines the amount of heat needed conditions and can cause the related warranty... -
Page 5: Electrical And Physical Data
196 [88.9] RA1448AJ1NA 208-230 19.9/19.9 109.0 1.00 35/35 45/45 18.84 [1.75] 4264 [2012] 135 [3827] 192 [87.1] 199 [90.3] RA1460AJ1NA 208-230 23.7/23.7 152.5 1.00 40/40 50/50 21.54 [2.00] 4139 [1953] 168 [4762] 202 [91.6] 209 [94.8] UNIT MODEL NUMBER EXPLANATION... -
Page 6: Specifications
GENERAL INFORMATION Specifications ALLOW 60" [1524mm] OF ALLOW 60” [1524mm] CLEARANCE OF CLEARANCE “W” “L” “H” SERVICE PANELS/ INLET CONNECTIONS / HIGH & LOW VOLTAGE SERVICE PANELS/ INLET CONNECTIONS / HIGH & LOW ACCESS ALLOW VOLTAGE ACCESS 24" [610 mm] OF ALLOW 24”... -
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: Space Limitations ���������������������������������������������������������8 Final Charge By Subcooling
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 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 12 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’ •...
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Page 13: Above Or Below Indoor Coil
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 • 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 15 INSTALLATION Interconnecting Tubing (cont�) 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 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 sized type “L” 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 kink 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: 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 any electrical connections� Also, the ground TYPICAL THERMOSTAT SUBBASE connection must be completed before making line FOR TYPICAL GAS OR OIL HEAT voltage connections�... -
Page 22: 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 23: Start
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 24: 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 25: 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 26: For Units With 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 recommended under the following outdoor difference between that shown on the unit data conditions ONLY: plate and that calculated for the new system installation�... -
Page 27: 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 28: Components And Controls
COMPONENTS AND CONTROLS Compressor Crankcase Heat (CCH) While scroll compressors usually do not require All 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 off cycles, during the off cycle can result in a noisy start up�... -
Page 29: Accessories
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 30: Checks Flowchart
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 31: Cooling Mechanical
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 32: 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 33: Service Analyzer Charts
DIAGNOSTICS Service Analyzer Charts COMPRESSOR OVERHEATING CHECK/REMEDY SYMPTOM POSSIBLE CAUSE 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 flow High internal load Hot air (attic) entering return Heat source on;... - Page 34 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 airflow Dirty coil Dirty filter Duct too small or restricted Faulty run capacitor Replace� Faulty internal overload Replace compressor�...
- Page 35 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 filter drier, evacuate, and recharge. High head pressure Noncondensibles air Unusual head and Wrong refrigerant or mixed refrigerants suction readings Foreign matter –...
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Page 36: Thermostatic Expansion Valves
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 37 DIAGNOSTICS Service Analyzer Charts THERMOSTATIC EXPANSION VALVES (cont.) SYMPTOM POSSIBLE CAUSE REMEDY Refrigerant drainage from flooded evaporator Install trap riser to the top of the evaporator coil� Inoperable crankcase heater or crankcase heater Replace or add crankcase heater� Compressor flood needed back upon start-up Any of the causes listed under symptoms of...
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Page 38: Cooling/Heating Tips
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... -
Page 39: Wiring Diagrams
WIRING DIAGRAMS For Single-Phase Models... -
Page 40: Wiring Diagrams
WIRING DIAGRAMS For Three-Phase Models... - Page 41 NOTES...
- Page 42 NOTES...
- Page 43 NOTES...