SEER up to 18.50 Heating Capacity - 21,200 to 55,500 Btuh

1 SEER up to to 5 TonsCooling Capacity - 23,200 to 57,000 BtuhHeating Capacity - 21,200 to 55,500 BtuhMODEL NUMBER IDENTIFICATIONHEAT PUMP OUTDOOR UNITSSL18XP1 DAVE LENNOX SIGNATURE COLLECTIONR-410A - SilentComfort TechnologyBulletin No. 210731 October 2017 Supersedes August 2017 PRODUCT SPECIFICATIONSN ominal Cooling Capacity 024 = 2 tons 030 = tons 036 = 3 tons 042 = tons 048 = 4 tons 060 = 5 tonsSL 18 X P 1 - 036 - 230 A 01 Nominal SEER 18 = 18 SEERR efrigerant Type X = R-410 ARevision LevelVoltage 230 = 208/230V-1 phase-60hzProduct Tier SL = Dave Lennox Signature CollectionUnit Type P = Heat Pump Outdoor UnitCooling Stages 1 = Single Stage CompressorRatings Revision LevelSL18XP1 2-5 TON HEAT PUMPSSL18XP1 - 2 to 5 Ton Heat Pump / Page 2 FEATURESWARRANTYC ompressor - Limited warranty for ten years in residential installations and

2 Five years in non-residential other covered components - Limited warranty for ten years in residential installations and one year in non-residential to Lennox Equipment Limited Warranty certificate included with unit for specific Certified to AHRI Standard 210 in the Lennox Research Laboratory environmental test according to Department of Energy (DOE) test Pump units and components within bonded for grounding to meet safety standards for servicing required by ETL, NEC and are ETL certified for the and 9001 Registered Manufacturing Quality expanded ratings, see Star certified units are designed to use less energy, help save money on utility bills, and help protect the environment.

3 Many Lennox home comfort systems meet EnErgy Star requirements when used with matching up to (Region IV) up to through 5 phase power levels as low as 67 air discharge allows concealment behind shrubs at grade level or out of sight on a for applications with remotely located indoor air handler units or gas furnaces with indoor add-on heat pumps are used with gas furnaces, a dual-fuel compatible thermostat or a zone control system with dual-fuel capabilities must be used (order separately).See Indoor Coils and Air Handlers sections for indoor unit shipped completely factory assembled, piped, and wired.

4 Each unit is test operated at the factory insuring proper must set outdoor unit, connect refrigerant lines, and make electrical connections to complete System Matches - All Regions ..16 Controls ..12 Dimensions ..14 Electrical Wiring ..13 Installation Clearances ..13 Model Number Identification ..1 Optional Accessories ..12 Sound Data ..13 Specifications ..12 Sunsource Home Energy System - Components ..8SL18XP1 - 2 to 5 Ton Heat Pump / Page 3 FEATURESREFRIGERATION SYSTEMR-410A RefrigerantNon-chlorine, ozone friendly, is factory pre-charged with refrigerant . Total system refrigerant charge is dependant on outdoor unit size, indoor unit size and refrigerant line to the unit-mounted charging sticker to determine correct amount of charge Coil Fan with SilentComfort TechnologySpecially-designed, SilentComfort fan guard uses Passive Vortex Suppression to reduce air PVC (polyvinyl chloride) coated steel designed fan blades reduce operating sound levels.

5 Direct drive fan moves large air volumes uniformly through entire condenser coil for high refrigerant cooling air discharge minimizes operating sounds and eliminates damage to lawn and motor is inherently totally enclosed for maximum protection from weather, dust and service access accomplished by removal of fan Quantum CoilEnhanced aluminum alloy tube/enhanced fin coil for superior corrosion designed and fabricated aluminum tube fins provide maximum exposure of fin surface to air stream resulting in excellent heat collars grip tubing for maximum contact shoulder tubing is factory tested under high pressure to insure leakproof coil is accessible for Pressure SwitchShuts off unit if abnormal operating conditions cause the discharge pressure to rise above compressor from excessive condensing Pressure SwitchShuts off unit if suction

6 Pressure falls below loss of charge and freeze-up Valve - Outdoor UnitDesigned and sized specifically for use in heat pump bulb is located on the suction line between the coil and the reversing valve thus sensing evaporator out temperature in the heat installed and Valve4-way interchange reversing valve effects a rapid change in direction of refrigerant flow resulting in quick changeover from cooling to Heating and vice operates on pressure differential between outdoor unit and indoor unit of the system. Factory Liquid Line DrierFactory installed in the liquid line, the drier traps moisture or dirt that could contaminate the refrigerant molecular-sieve bead type AccessoriesCheck/Expansion Valve KitsMust be ordered extra and field installed on certain evaporator units.

7 See TXV Usage style on or near the discharge line of the evaporator or on the suction suction line temperature and cycles the compressor off when suction line temperature falls below it s at 29 F and closes at 58 Weather KitFor heat pump Heating operation in mild weather climates. A pressure switch automatically cycles the outdoor fan motor when the head pressure rises above normal operating Line KitsRefrigerant lines (suction & liquid) are shipped refrigeration clean. Lines are cleaned, dried, pressurized, and sealed at line fully lines are stubbed at both Optional Accessories table for available for -060 model and must be field - 2 to 5 Ton Heat Pump / Page 4 COMPRESSORS croll CompressorCompressor features high efficiency with uniform suction flow, constant discharge flow, high volumetric efficiency and quiet consists of two involute spiral scrolls matched together to generate a series of crescent shaped gas pockets between them.

8 During compression, one scroll remains stationary while the other scroll orbits around it. Gas is drawn into the outer pocket, the pocket is sealed as the scroll rotates. As the spiral movement continues, gas pockets are pushed to the center of the scrolls. Volume between the pockets is simultaneously the pocket reaches the center, gas is now at high pressure and is forced out of a port located in the center of the fixed compression, several pockets are compressed simultaneously resulting in a smooth continuous compression flank contact, maintained by centrifugal force, minimizes gas leakage and maximizes compressor is tolerant to the effects of slugging and contaminants.

9 If this occurs, scrolls separate, allowing liquid or contaminants to be worked toward the center and gas pulses during compression reduces operational sound motor is internally protected from excessive current and is installed in the unit on resilient rubber mounts for vibration free installed crankcase HeaterCrankcase heater prevents migration of liquid refrigerant into compressor and ensures proper compressor Sound Dampening SystemA polyethylene compressor cover containing a 2-inch thick batt of fiberglass insulation for better sound open edges are sealed with a one-inch wide hook and loop fastening Communicating

10 ControlAdvanced control communicates information about various operating parameters in the heat pump outdoor unit to the optional iComfort Communicating Thermostat to constantly maintain the highest level of comfort, performance and efficiency for connecting a conventional heat pump thermostat are also Configuration - On start-up the control automatically sends a description of the unit to the optional iComfort Communicating Thermostat to automatically configure the number of stages and features DisplaySeven-segment display shows information about outdoor unit type and Capacity and also displays alerts for common fault conditions (electrical and mechanical).