Lennox ELKA Series Installation Instructions Manual

THIS MANUAL MUST BE LEFT WITH THE
BUILDING OWNER FOR FUTURE REFERENCE
WARNING
Horizontal application requires adjustment of the
Refrigerant Detection sensor, drain pan and drip pan.
Refer to instruction sections Horizontal Applications and
Installing Condensate Drain.
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, service agency, or the gas supplier.
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.
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.
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.
NOTE - The ELKA is a PARTIAL UNIT AIR HANDLER,
complying with PARTIAL UNIT requirements in this stan-
dard, 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
ELKA Series - 6 - 20 Tons
AIR HANDLERS
508670-01
1/2025

Table of Contents

Model Number Identification ..........................................6
EL072KA and EL090KA Unit Dimensions - Inches (mm) .7
EL120KA and EL150KA Dimensions - Inches (mm) ......8
EL180KA and EL240KA Dimensions - Inches (mm) ......9
Unit Parts Arrangement ................................................10
Unit Control Box Components Arrangement ............... 11
Typical Installation Support Method ............................. 11
Refrigerant Piping Connections ...................................13
Installation ...................................................................15
Horizontal Applications ................................................17
Upflow Applications .....................................................17
Sensor Installation / Relocation ...................................18
Installing Condensate Drain ........................................21
Freezestat Connections ..............................................22
Filter Rack Installation ................................................23
Duct Connections ........................................................25
Sealing the Unit ...........................................................26
Wiring .........................................................................26
Blower Motor Belt Tensioning Adjustment ...................29
Air Volume Adjustment ................................................30
Blower Data .................................................................30
Supply Air Inverter Startup............................................31
Thermostat Compatibility ..............................................31
Refrigerant Leak Detection System ..............................32
Normal System Operation ............................................33
Blower Drive Components ...........................................37
Blower Performance ....................................................38
Repairing or Replacing Cabinet Insulation ..................44
Preventive Maintenance / Repair ................................44
Sensor Maintenance ....................................................45
Decommissioning ........................................................45
Start-Up and Performance Checklist ............................46
General
This ELKA indoor air handler is designed for use with
R-454B refrigerant only and optional field-installed electric
heat. The air handler units are for indoor installation only
and are designed for upflow or horizontal applications. This
unit must be installed with an approved outdoor air con-
ditioner and line set as outlined in the ELKA Engineering
Handbook. These instructions are intended as a general
guide and do not supersede local codes in anyway. Consult
local authorities having jurisdiction before installation.
NOTE - Appliance intended only for indoor use (excluding
laundry rooms).
NOTE - For installation only in locations NOT accessible
to the general public, such as under a drop ceiling or with-
in a mechanical closet.
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