Lennox ECB45 Installation Instructions Manual
Lennox ECB45 Installation Instructions Manual

Lennox ECB45 Installation Instructions Manual

Electric heat sections used with air handler units

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THIS MANUAL MUST BE LEFT WITH THE
HOMEOWNER FOR FUTURE REFERENCE
Shipping and Packing List
Package 1 of 1 contains:
1 – Assembled electric heat section
1 – Circuit breaker cover
3 – Accessory kit labels
Check equipment for shipping damage. If you find any
damage, immediately contact the last carrier.
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.
WARNING
Every working procedure that affects safety means shall
only be carried out by competent persons. This appliance
is not to be used by persons (including children) with
reduced physical, sensory or mental capabilities, or
lack of experience and knowledge, unless they have
been given supervision or instruction concerning use of
the appliance by a person responsible for their safety.
Children should be supervised to ensure they do not
play with the appliance.
WARNING
Maximum Altitude of application is 3200m above sea
level.
NOTE – Partial units shall only be connected to an appli-
ance suitable for the same refrigerant.
INSTALLATION
INSTRUCTIONS
ECB45 Electric Heat Sections
Used with Air Handler Units
ELECTRIC HEAT SECTIONS
508507-02
05/2024
General Information
These instructions are intended to be a general guide and
do not supersede any local or national codes. Installation
must conform with the local building codes and with the
latest editions of the National Electric Code.
Be sure to disconnect all power to the unit while you install
and service this equipment. Use proper tools and protec-
tive equipment during installation and service.
Installation of air handler with or without optional electric
heat must conform with standards in the National Fire Pro-
tection Association (NFPA) "Standard for Installation of Air
Conditioning and Ventilation Systems NFPA No. 90A,"
and "Standard for Installation of Resident Type Warm Air
Heating and Air Conditioning System, No. 90B," the man-
ufacturer's installation instructions, and local municipal
building codes.
Electric Heat Sections
The electric heat sections provide field-installed electric
heat for air handler units.
The ECB45 electric heat section is available with 4, 5, 7.5,
10, 12.5, 15 and 20 KW elements.
Refer to the applicable indoor unit product specifications
bulletin (EHB) for heat section applications or unit Electric
Heat Accessory Kit label.
Heat Section Installation
Before installing or servicing unit, be sure
ALL power to the unit is OFF. More than one
disconnect switch may be present. Electrical
shock can cause personal injury or death!
Before installing the unit, check information on the unit
rating plate to ensure that the unit meets the job specifica-
tion, proper electrical power is available, and that proper
duct clearances are maintained.
NOTE – If installing heat sections at the same time as the
air handler unit, install the electric heat section in the air
handler unit before setting the air handler unit and attach-
ing the plenum.
Page 1
WARNING

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Summary of Contents for Lennox ECB45

  • Page 1 The electric heat sections provide field-installed electric CAUTION heat for air handler units. The ECB45 electric heat section is available with 4, 5, 7.5, As with any mechanical equipment, contact with sharp 10, 12.5, 15 and 20 KW elements. sheet metal edges can result in personal injury. Take...
  • Page 2 1 - Shut off all power to the air handler unit. More than one disconnect may be required. 2 - Remove air handler access panel and keep the screws to reattach access panel after installing heat elements. 3 - Disconnect any existing field supply wires and pull them out of the air handler.
  • Page 3: Electrical Connections

    NOTE – Refer to the nameplate on the air handler unit NOTE - There may be only one clip securing for minimum circuit ampacity and maximum overcurrent each circuit breaker. protection size. BREAKER(S) MOUNTING The air handler units are provided with openings to be CIRCUIT BRACKET BREAKER...
  • Page 4: Label Installation

    CIRCUIT BREAKER COVER (BACKSIDE) 1 - Verify that current Unit Accessory Kit label is marked with ECB45. 2 - If not, determine, per table 1 below, the applicable replacement Accessory Kit Label. 3 - Peel label backing and apply correct Accessory Kit Label over current unit label.
  • Page 5: Wiring Diagrams

    Wiring Diagrams PART NO. 537980-03 WIRING DIAGRAM - ELECTRIC HEAT HTR 2 HTR 2 PRI LS PRI LS 20KW HTR 4 HTR 3 HTR 2 HTR 1 SEC L SEC L SEC L SEC L HTR 4 HTR 3 HTR 2 HTR 1 PRI LS PRI LS...
  • Page 6 Cut size: 7" Wide x 9-1/2" Tall PART NO. 537981-04 WIRING DIAGRAM - ELECTRIC HEAT 20KW HTR 1 HTR 4 HTR 3 HTR 2 SEC L SEC L SEC L SEC L HTR 4 HTR 3 HTR 2 HTR 1 PRI LS PRI LS PRI LS...
  • Page 7 SYSTEM FIELD JUMPERS WARNING SINGLE STAGE AIR CONDITIONER NEED ALL TWO-STAGE AIR CONDITIONER REMOVE Y1 TO Y2 SINGLE STAGE HEAT PUMP REMOVE R TO O USE COPPER CONDUCTORS REMOVE Y1 TO Y2 AND R TWO-STAGE HEAT PUMP TO O ONLY TWO-STAGE ELECTRIC HEAT REMOVE W1 TO W2 TO ACTIVATE DEHUMIDIFICATION...
  • Page 8: Electric Heat

    PART NO. 538437-01 WIRING DIAGRAM - ELECTRIC HEAT 20KW HTR 4 HTR 3 HTR 2 HTR 1 SEC L SEC L SEC L SEC L HTR 4 HTR 3 HTR 2 HTR 1 PRI LS PRI LS PRI LS PRI LS 12.5KW &...
  • Page 9 Cut size: 7" Wide x 9-1/2" Tall PART NO. 538348-01 WIRING DIAGRAM - ELECTRIC HEAT 20KW HTR 3 HTR 2 HTR 1 HTR 4 SEC L SEC L SEC L SEC L HTR 3 HTR 2 HTR 4 HTR 1 PRI LS PRI LS PRI LS...
  • Page 10 SYSTEM FIELD JUMPERS SINGLE STAGE AIR CONDITIONER NEED ALL WARNING TWO-STAGE AIR CONDITIONER REMOVE Y1 TO Y2 SINGLE STAGE HEAT PUMP REMOVE R TO O USE COPPER CONDUCTORS REMOVE Y1 TO Y2 AND R TWO-STAGE HEAT PUMP TO O ONLY TWO-STAGE ELECTRIC HEAT REMOVE W1 TO W2 TO ACTIVATE DEHUMIDIFICATION...

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