Lennox ELA Series

Page 1
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.
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
Electric shock hazard! - Disconnect all power
supplies before servicing.
Replace all parts and panels before
operating.
Failure to do so can result in death or
electrical shock.
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.
Table of Contents
SPECIFICATIONS .......................................................... 2
BLOWER DATA ..............................................................4
I - UNIT COMPONENTS ..............................................19
II − REFRIGERATION SYSTEM ..................................20
III − BLOWER SPEED & BELT TENSION ....................20
IV − Electric Heat Components ....................................21
ELA Supply Air Inverter Startup .................................... 22
Verify Proper Operation ................................................ 23
V - Wiring Diagrams .....................................................24
ELA
6 – 20 TONS
Service Literature
UNIT INFORMATION
Corp. 1810-L3
February 15, 2019
ELA SERIES AIR HANDLER UNITS
Lennox ELA model blower−coil units are designed for
upow or horizontal air and indoor applications only.
ELA blower units are available in six models; 072, 090,
120, 150, 180 and 240. The units match up with Lennox
ELS condensing units and Lennox ELP heat pump units
charged with HFC−410A refrigerant.
Information and specications contained in this manual
are subject to change. Procedures outlined in this manual
are presented as a recommendation only and do not su-
persede or replace local or state codes.

Lennox ELA Series Specifications

General

Product Type	Air Handler
Series	ELA
Airflow	Up to 2000 CFM
Dimensions	Varies by model
Weight	Varies by model
Cooling Capacity	18, 000-60, 000 BTU/h
Motor Type	ECM
Cabinet	Galvanized steel
Voltage	208/230V
Filter Type	Standard 1" Filter

Summary

UNIT INFORMATION

ELA Series Air Handler Units

Overview of Lennox ELA series air handler units and their applications.

SPECIFICATIONS

General Unit Specifications

Details on model numbers, tonnage, blower type, and circuits.

Coil and Refrigerant Details

Evaporator coil specifications, including face area, split, and refrigerant.

Blower and Filter Specifications

Blower wheel size, filter type, and drive system specifications.

OPTIONS AND ACCESSORIES

Blower, Cabinet, and Control Options

Accessories for blower, cabinet features, and control system integration.

Indoor Air Quality and Refrigerant System Accessories

Air filters, CO2 sensors, and related system accessories.

BLOWER DATA

Blower Performance Tables

Performance data for ELA models by airflow and static pressure.

Blower Drive Specifications

RPM ranges and motor horsepower for blower drive selection.

OPTIONAL ELECTRIC HEAT DATA

Electric Heat Options and Ratings

Data on electric heat sizes, voltage, kW, and circuit requirements.

UNIT COMPONENTS

Variable Frequency Drive (VFD) System

Explanation of VFD, control board, and related components.

Safety and Control Components

Details on freezestats, overflow relays, and inverter protection.

REFRIGERATION SYSTEM

System Description

Overview of single or dual refrigerant circuits and distribution.

BLOWER SPEED AND BELT TENSION

Air Volume Adjustment Procedure

Steps for adjusting blower speed and belt tension for proper airflow.

ELECTRIC HEAT COMPONENTS

Heating Element and Contactor Details

Information on heating elements, contactors, and safety limits.

Sequencer Relays and Fuses

Role of sequencer relays, fuses, and transformer in electric heat.

ELA SUPPLY AIR INVERTER STARTUP

Inverter-Driven Blower Operation

How inverter-driven blowers operate for energy efficiency.

Setting Blower Speed and Damper Position

Procedures for setting minimum blower speeds and damper positions.

LVC2 BOARD TERMINAL DESIGNATIONS

LVC2 Board Outputs and Verification

Mapping of LVC2 board terminals and proper operation verification.

WIRING DIAGRAMS

Typical Unit Wiring Diagram

Schematic illustrating electrical connections for blower and VFD.

SEQUENCE OF OPERATION

Heat Call ELS ELP

Sequence for heating demand with ELS/ELP units.

Electric Heat Stage Operation

Operation of electric heat stages based on thermostat signals.