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©2024 Lennox Industries Inc.
Dallas, Texas, USA
THIS MANUAL MUST BE LEFT WITH THE
HOMEOWNER FOR FUTURE REFERENCE
General
This EL22KCV outdoor air conditioner with all-aluminum
coil is designed for use with R454B refrigerant only.
This unit must be installed with an approved indoor air
handler or coil. For AHRI Certified system match-ups and
expanded ratings, visit www.LennoxPros.com.
The EL22KCV variable capacity unit may be installed with
an S40 communicating thermostat or a standard 24VAC
non-communicating thermostat. See field wiring diagrams
for wiring details.
These instructions are intended as a general guide and do
not supersede local codes in any way. Consult authorities
having jurisdiction before installation.
NOTE – This unit EL22KCV is a PARTIAL UNIT AIR CON-
DITIONER, complying with PARTIAL UNIT requirements
of this Standard, and must only be connected to other units
that have been confirmed as complying to corresponding
PARTIAL UNIT requirements of this Standard, UL 60335-
2-40/CSA C22.2 No. 60335-2-40, or UL 1995/CSA C22.2
No 236.
INSTALLATION
INSTRUCTIONS
Elite
Series EL22KCV Units
®
AIR CONDITIONER
508484-01
7/2024
PACKING LIST
OUTDOOR UNIT
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, or service agency.
IMPORTANT: Special procedures are required for clean-
ing the all-aluminum coil in this unit. See page 25 in this
instruction for information.
This unit must be installed with an approved indoor air
handler or coil. For AHRI Certified system match-ups and
expanded ratings, visit www.LennoxPros.com.
To prevent serious injury or death:
1. Lock-out/tag-out before performing maintenance.
2. If system power is required (e.g., smoke detector
maintenance), disable power to blower, remove fan
belt where applicable, and ensure all controllers
and thermostats are set to the "OFF" position before
performing maintenance.
3. Always keep hands, hair, clothing, jewelry, tools, etc.
away from moving parts.
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.
Page 1
WARRANTY
CERTIFICATE
RAST 6-PIN
CONNECTORS (2)
WARNING
WARNING
CAUTION

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Summary of Contents for Lennox Elite EL22KCV Series

  • Page 1 INSTALLATION INSTRUCTIONS ©2024 Lennox Industries Inc. Dallas, Texas, USA Elite Series EL22KCV Units ® AIR CONDITIONER 508484-01 7/2024 PACKING LIST WARRANTY THIS MANUAL MUST BE LEFT WITH THE CERTIFICATE RAST 6-PIN HOMEOWNER FOR FUTURE REFERENCE OUTDOOR UNIT CONNECTORS (2) General...
  • Page 2 SETTING THE UNIT – Clearances See NOTES NOTES - Service clearance of 30 in. (762 mm) must be maintained on one of the sides adjacent to the control box. Clearance to one of the other three sides must be 36 in. (914 mm). Clearance to one of the remaining two sides may be 12 in.
  • Page 3: Refrigerating System

    WARNING TAmin Table Charge (lb) 10.0 15.0 20.0 25.0 30.0 If this appliance is conditioning a space with an area Charge (kg) 11.3 13.6 smaller than TAmin or stored in a space with an area Minimum Conditioned smaller than Amin as defined by this instruction, then 150.9 226.4 301.9 377.4 452.8 Area (ft2) that space must be without continuously operating open...
  • Page 4 IMPORTANT IMPORTANT When removing refrigerant from a system, either for When breaking into the refrigerant circuit to make servicing or decommissioning, it is recommended good repairs – or for any other purpose – conventional practice that all refrigerants are removed safely. procedures shall be used.
  • Page 5 DETAIL A DETAIL B INSTALL UNIT LEVEL OR, IF ON A SLOPE, MAINTAIN SLOPE TOLERANCE OF 2 DEGREES (OR 2 INCHES PER 5 FEET [50 MM PER 1.5 M]) AWAY INSTALL UNIT AWAY FROM WINDOWS FROM BUILDING STRUCTURE. BUILDING STRUCTURE MOUNTING SLAB TWO 90°...
  • Page 6: Unit Dimensions - Inches (Mm)

    UNIT DIMENSIONS – INCHES (MM) INLET 4 (102) 4 (102) INLET INLET (660) (737) LIQUID LINE 6-1/4 CONNECTION (159) 4 (102) SUCTION LINE CONNECTION INLET 6-1/8 30-1/2 (156) (775) TOP VIEW (102) BOTTOM VIEW BASE SECTION (With Optional Standoff Kit) 39-3/4 (1010) 35-3/4 (908) (depth)
  • Page 7 Polyvinyl ether (PVE) oils are used in damage, personal injury or death. Lennox units charged with R454B refrigerant. Residual WARNING mineral oil can act as an insulator, preventing proper heat transfer.
  • Page 8 The EL22KCV is a variable-capacity cooling system uti- • Maximum length vapor riser = 60 feet. lizing variable speed compressor technology. With the • Up to 50 Linear Feet: Use rated line sizes listed in table 1. variable speed compressor and variable pumping capac- •...
  • Page 9 TABLE 1. Standard Refrigerant Line Set – Up to 50 Linear Feet Inches (mm) Valve Size Connections Recommended Line Sets Liquid Line Suction Line L15 Line Set Model Line Set Length Catalog Number EL22KCV* -024 3/8” (10 mm) 3/4” (19 mm) L15-41-20 20 feet (6.1 m) 89J56...
  • Page 10 REFRIGERANT PIPING – Removing Existing Indoor Metering Device TYPICAL EXISTING FIXED ORIFICE TYPICAL EXISTING EXPANSION VALVE REMOVAL REMOVAL PROCEDURE PROCEDURE (UNCASED COIL SHOWN) (UNCASED COIL SHOWN) STUB END TWO-PIECE PATCH PLATE LIQUID LINE CHECK DISTRIBUTOR TUBES (UNCASED COIL ONLY) ORIFICE EXPANSION LIQUID LINE ORIFICE HOUSING HOUSING...
  • Page 11: Cap And Core Removal

    REFRIGERANT PIPING – Brazing Procedures CAP AND CORE REMOVAL PIPING PANEL REMOVAL / PREPARING LINE SET Remove service cap and core from both the suction / Remove piping panel to access service valves. Cut vapor and liquid line service ports. ends of the refrigerant lines square (free from nicks or dents) and debur the ends.
  • Page 12 alloys and flux. WRAP SERVICE VALVES To help protect service valve seals during brazing, wrap water-saturated cloths around service valve bodies and copper tube stubs. Use additional water-saturated cloths under the valve body to protect the base paint. FLOW NITROGEN WARNING Flow regulated nitrogen (at 1 to 2 psig) through the refrigeration FIRE, PERSONAL INJURY, OR PROPERTY DAMAGE...
  • Page 13 REFRIGERANT PIPING – Install Indoor Expansion Valve This outdoor unit is designed for use in systems that include an expansion valve metering device (purchased separately) at the indoor coil. See the EL22KCV Product Specifications bulletin (EHB) for approved expansion valve kit match-ups and application information.
  • Page 14: Leak Test And Evacuation

    LEAK TEST AND EVACUATION LEAK TEST HIGH MANIFOLD GAUGE SET OUTDOOR UNIT TO VAPOR SERVICE VALVE NOTE - Position canister to deliver liquid refrigerant. NITROGEN R454B CONNECT GAUGE SET A - Connect the high pressure hose of an R454B manifold gauge set to the vapor valve service port. NOTE - Normally, the high pressure hose is connected to the liquid line port.
  • Page 15: Evacuate The System

    EVACUATION HIGH CONNECT GAUGE SET NOTE - Remove cores from service valves (if not already done). A - Connect low side of manifold gauge set with 1/4 SAE in-line tee to vapor line service valve B - Connect high side of manifold gauge set to OUTDOOR MANIFOLD liquid line service valve...
  • Page 16 The Lennox M30, CS7500, CS3000 and many other commer- cially available electronic thermostats provide this feature. The EL22KCV unit will provide full variable capacity oper-...
  • Page 17: Install Thermostat

    INSTALL THERMOSTAT SIZE CIRCUIT AND INSTALL SERVICE DISCONNECT SWITCH Install room thermostat (ordered separately) on an inside Refer to the unit nameplate for minimum circuit ampacity, wall approximately in the center of the conditioned area and maximum fuse or circuit breaker (HACR per NEC). and 5 feet (1.5m) from the floor.
  • Page 18 when charging the system with refrigerant, checking the Outdoor Control 7 Segment Display and refrigerant charge, pumping down the system and per- Push Button forming other service procedures that requires outdoor unit operation at 100% capacity. Information concerning the outdoor control 7-segment dis- EL22KCV Charge Mode Operation with a S40 Commu- play and push button operations are available on the unit access panel.
  • Page 19 FIGURE 11. Typical Factory Wiring Page 19...
  • Page 20 Communicating Thermostat with Indoor and Outdoor Units FIGURE 12. EL22KCV with S40 Communicating Thermostat – Field Wiring Diagram with RDS Controller. Page 20...
  • Page 21 FIGURE 13. Conventional 24VAC Cooling Non-Communicating Thermostat Wiring with RDS Controller Page 21...
  • Page 22: Unit Start-Up

    6 - Connect manifold gauge set for testing and charging ty to maximum capacity based upon thermostat demand. or use the Lennox Dealer Setup App to monitor the The indoor air volume will be controlled to match cooling pressures and temperatures of the refrigeration capacity throughout the capacity range.
  • Page 23: Operating Angle-Type Service Valve

    When service valve is OPEN, the service port is open to line set, indoor and outdoor unit. capacity by entering the test mode at the S40 thermostat or using the Lennox Dealer Setup App. The S40 Test Mode can be selected by going to (VALVE STEM SHOWN CLOSED) Menu>...
  • Page 24 OUNCES PER 5 FEET (G PER 1.5 M) ADJUST LIQUID LINE DIA. • Have your Lennox dealer show you where your indoor FROM 15 FEET (4.6 M) LINE SET* unit filter is located. It will be either at the indoor unit 3/8"...
  • Page 25 (less than 50psi). If the 4 - Inspect the indoor coil drain pans and condensate coil cannot be cleaned using water alone, Lennox drains for rust, debris, obstructions, leaks or cracks. recommends use of a coil cleaner with a pH in the Pour water in pans to confirm proper drainage from range of 5 to 9.
  • Page 26: Start Up Checks

    EL22KCV Start-Up and Performance Checklist Customer Address Indoor Unit Model Serial Outdoor Unit Model Serial Notes: START UP CHECKS Refrigerant Type: Input Amps: Actual Amps Rated Volts Actual Volts Condenser Fan Full Load Amps Actual Amps: COOLING MODE Suction Pressure: Liquid Pressure: Supply Air Temperature: Ambient Temperature: Return Air: Temperature:...

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