Lennox Elite EL21KLV Installation Instructions Manual

©2024 Lennox Industries Inc.
Dallas, Texas, USA
THIS MANUAL MUST BE LEFT WITH THE
HOMEOWNER FOR FUTURE REFERENCE
General
This EL21KLV outdoor heat pump 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 EL21KLV 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 EL21KLV is a PARTIAL UNIT HEAT
PUMP, 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.
NOTE – Carefully transport the unit from the truck to the
installation site using a dolly.
Once at the installation site, the unit can be handled with
or without a dolly to place it at the desired location.
INSTALLATION
INSTRUCTIONS
Elite Series EL21KLV Units
®
HEAT PUMP
508493-01
8/2024
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 27 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