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©2024 Lennox Industries Inc.
Dallas, Texas, USA
THIS MANUAL MUST BE LEFT WITH THE
HOMEOWNER 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.
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.
IMPORTANT: Special procedures are required for clean-
ing the all-aluminum coil in this unit. See page 20 in this
instruction for information.
STEP 1 – SETTING THE UNIT – Clearances
See
NOTES
NOTICE: Specific applications may require adjustment of the listed installation clearances to provide protection for
the unit from physical damage or to avoid conditions which limit operating efficiency. (Example: Clearances may
have to be increased to prevent snow or ice from falling on the top of the unit. Additional clearances may also be
required to prevent air recirculation when the unit is installed under a deck or in another tight space.)
See NOTES
See
NOTES
Control
See NOTES
Box
INSTALLATION
INSTRUCTIONS
Elite
Series EL16KP1 Units
®
HEAT PUMP
508406-01
7/2024
General
This EL16KP1 outdoor heat pump with all-aluminum coil
is designed for use with R-454B refrigerant only. This unit
must be installed with an approved indoor air handler or
coil. For AHRI Certified system match-ups and expand-
ed ratings, visit www.LennoxPros.com. These instructions
are intended as a general guide and do not supersede
local codes in any way. Consult authorities having jurisdic-
tion before installation.
Charging information is given on the charging
procedure sticker on the unit access panel. For
more in-depth information, consult the Installation
and Service Procedures manual, available on
LennoxPros.com or through the Technical Support
department at 800-453-6669.
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.
NOTE – This unit EL16KP1 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 corre-
sponding 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.
NOTES:
Service clearance of 30 in. 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.
Clearance to one of the remaining two sides may be 12 in. and the
final side may be 6 in.
A clearance of 24 in. must be maintained between two units.
48 in. clearance required on top of unit.
Page 1
NOTICE!
CAUTION
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Related Manuals for Lennox Elite EL16KP1
Summary of Contents for Lennox Elite EL16KP1
- Page 1 INSTALLATION INSTRUCTIONS ©2024 Lennox Industries Inc. Dallas, Texas, USA Elite Series EL16KP1 Units ® HEAT PUMP 508406-01 7/2024 General This EL16KP1 outdoor heat pump with all-aluminum coil is designed for use with R-454B refrigerant only. This unit must be installed with an approved indoor air handler or coil.
- Page 2 WARNING CAUTION • Do not use means to accelerate the defrosting pro- Under no circumstances shall potential sources of cess or to clean, other than those recommended by ignition be used in the searching for or detection of the manufacturer. 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: Unit Dimensions - Inches (Mm)
NOTE – 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. Values must be multiplied by altitude adjustment factor at installed altitude. Qmin table refers to minimum airflow requirements during refrigerant leak mitigation by the refrigerant detection system, based upon total system charge. -
Page 5: Step 2 - Refrigerant Piping
Take care to empty all existing traps. Polyolester (POE) FIGURE 2 oils are used in Lennox units charged with R-454B refrigerant. Residual mineral oil can act as an insulator, preventing proper heat transfer. It can also clog the expansion device and reduce system performance and capacity. - Page 6 Flush the existing line set per the following instructions. Downflow Applications: Mounted on one side of the evap- For more information, refer to the Installation and Service orator coil 9 inches above the floor and within 9 inches Procedures manual available on LennoxPros.com. CAU- from front of coil.
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Page 7: Installation
LINE SET IMPORTANT — Refrigerant lines must not contact structure. INSTALLATION REFRIGERANT LINE SET — INSTALLING Line Set Isolation - The following illustrations are VERTICAL RUNS (NEW CONSTRUCTION SHOWN) examples of proper refrigerant line set isolation: NOTE - Insulate liquid line when it is routed through areas where the surrounding ambient temperature could become higher than the REFRIGERANT LINE SET —... - Page 8 STEP 2 – REFRIGERANT PIPING – (Continued) 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 VALVE...
- Page 9 STEP 2 – REFRIGERANT PIPING – Brazing Procedures CAP AND CORE REMOVAL CUT AND DEBUR Cut ends of the refrigerant lines square (free from nicks or dents) Remove service cap and core from and debur the ends. The pipe must remain round. Do not crimp end both the vapor and liquid line service of the line.
- Page 10 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 underneath the valve body to protect the base paint. FLOW NITROGEN Flow regulated nitrogen (at 1 to 2 psig) through the refrigeration gauge set into the valve stem port connection on the liquid service valve and out of the vapor valve stem port.
- Page 11 STEP 2 – 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 EL16KP1 Product Specifications bulletin (EHB) for approved expansion valve kit match-ups and application information.
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Page 12: Step 3 - Leak Test And Evacuation
STEP 3 – LEAK TEST AND EVACUATION LEAK TEST HIGH MANIFOLD GAUGE SET OUTDOOR UNIT TO VAPOR SERVICE VALVE NOTE - Position canister to deliver liquid refrigerant. NITROGEN R-454B CONNECT GAUGE SET A - Connect the high pressure hose of an R-454B manifold gauge set to the vapor valve service port. NOTE - Normally, the high pressure hose is connected to the liquid line port. - Page 13 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...
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Page 14: Electrostatic Discharge
Electrostatic discharge can affect electronic components. Take care REFRIGERANT DETECTION SYSTEM during unit installation and service to Unit must be installed with Lennox Approved Refrigerant protect the unit’s electronic controls. detection system (RDS) and sensor. ELECTROSTATIC Precautions will help to avoid control... -
Page 15: Step 5 - Unit Start-Up
STEP 4 – ELECTRICAL – (Continued) – High Voltage and Field Control Wiring The following illustration provides an example of control wiring connections when using a standard thermostat. Single-Stage Heat Pump with Air Handler RDS Sensor Thermostat Air Handler SENSOR #1 RDS Blower Control Board –... - Page 16 Torque Requirements When servicing or repairing heating, ventilating and air conditioning components, ensure the fasteners are appro- priately tightened. Table 2 lists torque values for fasteners. TABLE 2 TORQUE REQUIREMENTS Parts Recommended Torque Service valve cap 8 ft.-lb. 11 NM Sheet-metal screws 16 in.-lb.
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Page 17: Defrost System
EL16KP1 unit is factory-charged with enough R454B re- Charging frigerant to accommodate a 15-foot length of refrigerant piping. For line lengths over 15 feet, add 3 oz of refrigerant Verify the unit is electrically grounded before charging the for every 5 feet of piping beyond 15 feet. system. - Page 18 DEFROST SYSTEM OVERVIEW Position Definitions for P3 Header: The control monitors ambient temperature, outdoor coil • Connecting P3-1 and P3-2 will set the nominal defrost temperature, and total run time to determine when a de- time to 140 seconds. frost cycle is required. The coil temperature probe is de- •...
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Page 19: Homeowners Information
• Have your Lennox dealer show you where your indoor nace which deliver lower volumes of considerably hotter unit filter is located. It will be either at the indoor unit air to heat the space. -
Page 20: Professional Maintenance
In coastal areas, the coil should be cleaned with any time the unit is in operation. If you are unsure about potable water several times per year to avoid corro- the filter required for your system, call your Lennox dealer sive buildup (salt). for assistance. - Page 21 4 - Inspect the indoor coil drain pans and condensate Decommissioning drains for rust, debris, obstructions, leaks or cracks. Pour water in pans to confirm proper drainage from Before carrying out this procedure, it is essential that the technician is completely familiar with the equipment and the pan through to the outlet of the pipe.
- Page 22 R‐454B Refrigerant Pressure‐Temperature Chart Saturated Saturated Saturated Saturated Saturated Saturated Saturated Saturated Pressure Pressure Pressure Pressure Liquid Vapor Liquid Vapor Liquid Vapor Liquid Vapor (psig) (psig) (psig) (psig) Temp (°F) Temp (°F) Temp (°F) Temp (°F) Temp (°F) Temp (°F) Temp (°F) Temp (°F) ‐58.9 ‐57.1 58.9 61.3 93.0 95.4 113.4 115.6 ‐19.2 ‐17.2...
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Page 23: Start Up Checks
EL16KP1 Start-Up and Performance Checklist Customer Address Indoor Unit Model Serial Outdoor Unit Model Serial Notes: START UP CHECKS Refrigerant Type: Rated Load 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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