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THIS MANUAL MUST BE LEFT WITH THE
BUILDING OWNER FOR FUTURE REFERENCE
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, or service agency.
IMPORTANT
The Clean Air Act of 1990 bans the intentional venting of
refrigerant (CFCs, HCFCs and HFCs) as of July 1, 1992.
Approved methods of recovery, recycling or reclaiming
must be followed. Fines and/or incarceration may be
levied for noncompliance.
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.
WARNING
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.
INSTALLATION
INSTRUCTIONS
ELKP Series
6, 7 .5 and 10 Ton
HEAT PUMPS
6, 7.5 AND 10 TONS
508669-01
4/2025
Table of Contents
Application Considerations ............................................4
Model Number Identification ..........................................5
and Centers of Gravity ...................................................6
Unit Plumbing Parts Arrangement ..................................7
Unit Control Box Component Arrangement ....................8
Rigging the Unit for Lifting .............................................8
Installation Clearances ..................................................9
Line Set .........................................................................9
Electrical Connections .................................................10
Refrigerant Charge ......................................................15
System Startup and Operation ....................................15
Defrost System ............................................................16
Defrost Control Board ..................................................17
Preventive Maintenance / Repair ................................17
Decommissioning ........................................................18
Shipping and Packing List
Check the unit for shipping damage. If damaged or parts
are missing, immediately contact the last shipping carrier.
1 - Assembled outdoor unit
1 - Installation instructions
General
This ELKP outdoor air conditioner is designed for use with
R-454B refrigerant only. This unit must be installed with an
approved indoor air handler or coil and line set as outlined
in the ELKP Engineering Handbook. These instructions
are intended as a general guide and do not supersede
local codes in anyway. Consult local authorities having ju-
risdiction before installation.
This outdoor unit is designed for use in thermal expansion
valve (TXV) systems only.
NOTE - The ELKP is a PARTIAL UNIT AIR CONDITION-
ER, complying with PARTIAL UNIT requirements of this
standard, and must only be connected to other units that
have been confirmed as complying to corresponding PAR-
TIAL UNIT requirements of this Standard, UL 60335-2-40/
CSA C22.2 No. 60335-2-40, or UL 1995/CSA C22.2 No
236.
Page 1
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Related Manuals for Lennox ELKP Series
Summary of Contents for Lennox ELKP Series
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Page 1: Table Of Contents
INSTALLATION INSTRUCTIONS ELKP Series 6, 7 .5 and 10 Ton HEAT PUMPS 6, 7.5 AND 10 TONS 508669-01 4/2025 Table of Contents THIS MANUAL MUST BE LEFT WITH THE Application Considerations ..........4 BUILDING OWNER FOR FUTURE REFERENCE Model Number Identification ..........5... - Page 2 WARNING CAUTION • The appliance shall be stored in a room without con- Under no circumstances shall potential sources of tinuously operating ignition sources (for example: ignition be used in the searching for or detection of open flames, an operating gas appliance, or an oper- refrigerant leaks.
- Page 3 IMPORTANT IMPORTANT When breaking into the refrigerant circuit to make When removing refrigerant from a system, either for repairs – or for any other purpose – conventional servicing or decommissioning, it is recommended good procedures shall be used. However, for flammable practice that all refrigerants are removed safely.
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Page 4: Application Considerations
Application Considerations R-454B is a A2L refrigerant. The system installation must meet the following parameters based upon total refrigerant charge (line set included). TAmin (Total minimum conditioned area) is the minimum allowable conditioned area based upon the total system charge at sea level. -
Page 5: Model Number Identification
Model Number Identification EL 120 K P S S T 1 Y Brand/Family Voltage Y = 208/230V-3 phase-60Hz G = 460V-3 phase-60Hz J = 575V-3 phase-60Hz Nominal Cooling Capacity − Tons 072 = 6 Tons 090 = 7.5 Tons 120 = 10 Tons Design Sequence 1 = 1st Revision Refrigerant Type... -
Page 6: Unit Dimensions, Corner Weights And Centers Of Gravity
Unit Dimensions, Corner Weights and Centers of Gravity CORNER WEIGHTS CENTER OF GRAVITY Model lbs. lbs. lbs. lbs. EL072KPSS 21-1/2 27-1/4 EL090KPSS 21-3/4 EL120KPSS 25-1/4 INLET AIR OUTDOOR FAN GUARDS 9-1/8 (232) CENTER OF GRAVITY LIQUID LINE 1-1/8 (29) SUCTION LINE 1-1/8 (127) -
Page 7: Unit Plumbing Parts Arrangement
Unit Plumbing Parts Arrangement EL072KPSS / EL090KPSS EL120KPSS Page 7... -
Page 8: Unit Control Box Component Arrangement
Unit Control Box Component Arrangement Rigging the Unit for Lifting Lifting point should be directly above the center of gravity. Important - all panels Rig the unit for lifting by attaching four cables to the holes Caution - do not must be in place for in the base rail of the unit. -
Page 9: Installation Clearances
IMPORTANT Line Set Field refrigerant piping consists of liquid and suction lines This unit must be matched with an indoor coil as specified connecting the condensing unit and the indoor unit. Liquid with AHRI. For AHRI Certified system match-ups, see and suction service valves are located in a compartment ELKP Engineering Handbook. -
Page 10: Electrical Connections
LennoxPros.com Take care to empty all existing traps. Polyolester (POE) Electrical Connections oils are used in Lennox units charged with R-454B refrigerant. Residual mineral oil can act as an insulator, WARNING preventing proper heat transfer. It can also clog the expansion device and reduce system performance and Electric Shock Hazard. - Page 11 SIZE CIRCUIT AND INSTALL SERVICE INSTALL THERMOSTAT DISCONNECT SWITCH MAIN FUSE BOX/BREAKER PANEL DISCONNECT SWITCH THERMOSTAT 5 FEET (1.5M) Install room thermostat (ordered separately) on an inside wall approximately in the center of the conditioned area and 5 feet (1.5m) from the floor.
- Page 12 TYPICAL CONTROL WIRING Low Voltage Control Wires TB14 TB14 OUTDOOR HEAT PUMP A194 INDOOR THERMOSTAT AIR HANDLER (Field Provided) WIRING DIAGRAM KEY NUMBERS WIRING DIAGRAM 11/24 THERMOSTAT SUPPLIED BY USER CS7500 COMMERCIAL MODEL SPLIT SYSTEMS - HEAT PUMP LABEL-WIRING DIAGRAM 24V OUTPUT FOR AUX.
- Page 13 TYPICAL UNIT CONTROL WIRE CONNECTIONS WIRE RUN LENGTH AWG# INSULATION TYPE LESS THAN 100’ (30M) TEMPERATURE RATING MORE THAN 100’ (30M) 35°C MINIMUM CONTROL BOX CONTACTOR RUN CONTROL WIRES THROUGH RIGHT CUTOUT. RUN CONTROL WIRES THROUGH WIRE TIES. TIGHTEN WIRE TIE TO SECURE 24VDC CONTROL WIRING. ROUTE THROUGH WIRE TIES NOTE - FOR PROPER VOLTAGES, SELECT THERMOSTAT WIRE (CONTROL...
- Page 14 FIGURE 3. Typical Wiring Diagram – ELKP Heat Pumps Page 14...
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Page 15: Refrigerant Charge
Torque Requirements Refrigerant Charge When servicing or repairing heating, ventilating and air The ELKP units have a factory holding charge of 2 pounds conditioning components, ensure the fasteners are appro- of R-454B in each circuit. Additional refrigerant will need priately tightened. TABLE 2 lists torque values for fasten- to be added during installation. -
Page 16: Defrost System
The control provides automatic switching from normal heat- Defrost System ing operation to defrost mode and back. During compressor cycle (defrost thermostat is closed, calling for defrost), the The defrost system includes a defrost thermostat and a control accumulates compressor run times at 30, 60, or 90 defrost control. -
Page 17: Defrost Control Board
switch (S87). Defrost Control Board During a single thermostat cycle, the defrost control will DEFROST CONTROL TIMING PINS lock out the unit after the fifth time that the circuit is inter- rupted by any pressure switch that is wired to the control board. -
Page 18: Decommissioning
The area shall be checked with an appropriate refriger- IMPORTANT ant detector prior to and during work, to ensure the tech- nician is aware of potentially toxic or flammable atmo- Sprinklers and soaker hoses should not be installed spheres. Ensure that the leak detection equipment being where they could cause prolonged exposure to the used is suitable for use with all applicable refrigerants, i.e. -
Page 19: Start-Up And Performance Checklist
d) Pump down refrigerant system, if possible. k) Recovered refrigerant shall not be charged into an- other REFRIGERATING SYSTEM unless it has been e) If a vacuum is not possible, make a manifold so that cleaned and checked. refrigerant can be removed from various parts of the system.
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