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Table of Contents
Dimensions .......................................................2
Parts Arrangement............................................2
Shipping And Packing List ................................3
General .............................................................3
Requirements ...................................................3
Unit Support......................................................6
Duct Connection ...............................................6
Rigging Unit For Lifting .....................................7
Unpacking.........................................................7
Downflow Air Discharge....................................7
Horizontal Air Discharge ...................................8
Condensate Drains ...........................................8
Electrical Connections ......................................9
Blower Operation And Adjustments ................10
Heater Kit Accessory (If Used) .......................12
Start-Up ..........................................................12
Service............................................................17
Refrigerant Detection System.........................21
Decommissioning ...........................................27
Equipment Checks .........................................28
RETAIN THESE INSTRUCTIONS FOR FUTURE REFERENCE
INSTALLATION
INSTRUCTIONS
LRP14AC/HP36
LRP14AC/HP48
LRP14AC/HP60
COOLING AND HEAT PUMP PACKAGED UNITS
508717-01
5/2025
WARNING
Improper installation, adjustment, alteration, service or
maintenance can cause property damage, personal
injury or loss of life. Installation and service must be
performed by a licensed professional HVAC installer or
equivalent, service agency, or the gas supplier.
CAUTION
As with any mechanical equipment, contact with sharp
sheet metal edges can result in personal injury. Take
care while handling this equipment and wear gloves and
protective clothing.
3-Ton
4-Ton
5-Ton
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Related Manuals for Lennox LRP14AC/HP36
Summary of Contents for Lennox LRP14AC/HP36
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Page 1: Table Of Contents
INSTALLATION INSTRUCTIONS Table of Contents LRP14AC/HP36 3-Ton LRP14AC/HP48 Dimensions ............2 4-Ton Parts Arrangement..........2 LRP14AC/HP60 Shipping And Packing List ........3 5-Ton General .............3 Requirements ...........3 COOLING AND HEAT PUMP PACKAGED UNITS 508717-01 Unit Support............6 5/2025 Duct Connection ..........6 Rigging Unit For Lifting ........7 WARNING Unpacking............7... -
Page 2: Dimensions
DIMENSIONS in. (mm) - LRP14AC/HP36, 48, 60 2-1/8 (54) 2-3/8 (60) 19-1/2 19-1/2 (495) (495) 2-3/8 (60) DOWNFLOW DOWNFLOW 16-1/8 18-1/2 11-1/2 RETURN AIR SUPPLY AIR (410) (470) (292) OPENING OPENING BOTTOM POWER ENTRY ALTERNATE BOTTOM POWER ENTRY (178) 3-1/4 (83) Typ. -
Page 3: Shipping And Packing List
WARNING Shipping and Packing List Package 1 of 1 contains: Every working procedure that affects safety means shall only be carried out by competent persons. This appliance 1 - Assembled unit is not to be used by persons (including children) with Check unit for shipping damage. -
Page 4: Refrigerating System
Prior to recharging the system, it shall be pressure- tested with the appropriate purging gas. The system shall be leak tested on completion of charging, but prior to commissioning. A follow up leak test shall be carried out prior to leaving the site.. LRP14AC/HP36, 48, 60 Page 4... -
Page 5: Unit Clearances
IMPORTANT UNIT CLEARANCES When breaking into the refrigerant circuit to make repairs – or for any other purpose – conventional procedures shall be used. However, for flammable refrigerants it is important that best practice be followed and, since flammability is a consideration, procedures such as safely remove refrigerant following local and national regulations, purging the circuit with inert gas, evacuating (optional for A2L), purging with inert gas... -
Page 6: Unit Support
The unit is shipped capable of either horizontal flow (side duct connections) or down flow (bottom duct connections). Duct attachment screws are intended to go into the duct panel. Duct to unit connections must be sealed and weather-proofed. LRP14AC/HP36, 48, 60 Page 6... -
Page 7: Rigging Unit For Lifting
CAUTION Downflow Air Discharge Unit is shipped with panels covering the horizontal and In downflow applications, do not drill or punch holes in downflow supply and return air openings (four covers). base of unit. Leaking in roof may occur if unit base is punctured. -
Page 8: Horizontal Air Discharge
CAUTION - Drain lines should be hand-tightened only. 4 - Remove the lower (relief) hood from the economizer. Do not use tools to tighten fitting into drain. LRP14AC/HP36, 48, 60 Page 8... -
Page 9: Electrical Connections
THERMOSTAT WIRING CONDENSATE SIDE DRAIN CONNECTION A - Thermostat Location NOTE - Allow clearance to Room thermostat mounts vertically on a standard 2” X 4” open doors when installing condensate piping. handy box or on any non-conductive flat surface. UNIT Locate thermostat approximately 5 feet (1524mm) above the floor in an area with good air circulation at average Minimum Pitch... -
Page 10: Blower Operation And Adjustments
NOTE - All air data is measured external to unit with dry coil and without air filters. Taps 4 and 5 are used with Optional Electric Heat. Refer to Electric Heat nameplate for proper heat tap selection. LRP14AC/HP36, 48, 60 Page 10... - Page 11 LRP14AC/HP48 External Static (in.w.g.) Blower Tap 1301 1175 1053 Tap 1 (Fan Only) Watts 1875 1830 1782 1734 1686 1638 1588 1536 1482 1426 Tap 2 (Low 1011 Cooling) Watts 1961 1919 1877 1838 1800 1759 1716 1676 1635 1595 Tap 3 (High 1020...
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Page 12: Heater Kit Accessory (If Used)
• If the unit is equipped with a delay timer, the blower will continue to operate for 60 to 90 seconds, which improves system efficiency. LRP14AC/HP36, 48, 60 Page 12... - Page 13 Heating - Heat Pump Stage The control provides automatic switching from normal heating operation to defrost mode and back. During the • Upon heating demand, the thermostat closes circuit compressor cycle (call for defrost), the control accumulates R to Y, which closes the unit contactor, starting the compressor run time at 30, 60, 90 minute field-adjustable compressor and outdoor fan.
- Page 14 Low Pressure Switch Lockout The delay is bypassed by placing the timer select jumper High Pressure Switch across the TEST pins for 0.5 seconds. Slow FLASH Fault High Pressure Switch Lockout LRP14AC/HP36, 48, 60 Page 14...
- Page 15 C - Three-Phase Scroll Compressor Voltage Phasing TABLE 3 A/C COOLING SYSTEM PERFORMANCE VALUES Three phase scroll compressors must be phased sequentially to ensure correct compressor and blower Model Suction Superheat +/- 1 rotation and operation. Compressor and blower are wired 3 Ton in phase at the factory.
- Page 16 +/-2 PSIG LIQUID +/- 4 PSIG 24.5 27.5 COOLING +/- 1 DEG TABLE 9 Minimum Circulation Airflow Charge (oz) 60 - 80 80 - 100 100 - 120 120 - 140 140 - 160 Qmin (CFM) LRP14AC/HP36, 48, 60 Page 16...
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Page 17: Service
• Where electrical components are being changed, Service they shall be fit for the purpose and to the correct The unit should be inspected once a year by a qualified specification. At all times the manufacturer’s service technician. maintenance and service guidelines shall be followed. - Page 18 Turn off power before attempting to remove 1” (508 X 508 X 51mm) filters. Refer to local codes or blower access panel or to clean blower wheel. appropriate jurisdiction for approved filters. LRP14AC/HP36, 48, 60 Page 18...
- Page 19 Approved Auxiliary Devices DESCRIPTION WHERE USED KIT NUMBER Compressor Crankcase Heater All Tonnages 21D21 3-ph Compressor Crankcase Heater All Tonnages 11X27 230V 1-ph or 3-ph Compressor Timed-Off Control All Tonnages 47J27 Freezestat All Tonnages 21D23 Low Ambient Kit (0°F) All Tonnages 21D20 Base Rail Openings Closure Kit All Tonnages...
- Page 20 14 in Clip Curbs All Tonnages 21J19 18 in Clip Curbs All Tonnages 21J20 24 in Clip Curbs All Tonnages 21J25 14 in Adjustable Pitch Roof Curb All Tonnages 21J26 Strapping Kit - Hurricane All Tonnages 21J74 LRP14AC/HP36, 48, 60 Page 20...
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Page 21: Refrigerant Detection System
1 - The RDS Non-Communicating Blower Control Board Refrigerant Detection System shuts off the (R) input (24VAC power) to the thermo- stat, which de-energizes the outdoor unit compressor and heat sources, such as gas and/or electric strip heat. No heating or cooling demands will be met. 2 - The RDS Non-Communicating Blower Control Board activates the blower (high speed). - Page 22 RDSC with the RDS Non-Communicating Blower Control Board. Recommend replacing with a compatible thermostat. Initializing Long Reset control Monitoring Short Clear purge-counter if prior mitigation has occurred; Test mitigation Monitoring Long Reset control LRP14AC/HP36, 48, 60 Page 22...
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Page 23: Additional Applications
Heating Demand Additional Applications 1 - Prompt a heating demand at the thermostat. In zoned applications, all dampers will remain open when 2 - Press the Test button on the RDS Non-Communicating Blower Control Board. the RDS Non-Communicating Blower Control Board is in Fault or Leak Detected mode. - Page 24 FIGURE 11 LRP14AC/HP36, 48, 60 Page 24...
- Page 25 FIGURE 12 Page 25 508717-01 5/2025...
- Page 26 FIGURE 13 LRP14AC/HP36, 48, 60 Page 26...
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Page 27: Decommissioning
Decommissioning Before carrying out this procedure, it is essential that the technician is completely familiar with the equipment and all its detail. It is recommended good practice that all refrigerants are recovered safely. Prior to the task being carried out, an oil and refrigerant sample shall be taken in case analysis is required prior to re-use of recovered refrigerant. -
Page 28: Equipment Checks
Belt Tension Amps Nameplate Amps: ________ Volts: ________________ Motor Amps Volts _____________L1 ___________ L1-L2 ___________ _____________L1 ___________ L1-L2 ___________ _____________L1 ___________ L1-L2 ___________ Control Type Accessory Checks Economizer Operation Min. Pos. Motor Travel full open/close LRP14AC/HP36, 48, 60 Page 28...
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