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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, 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.
Shipping and Packing List
Package 1 of 1 contains:
1 – Assembled electric heat section
1 – Bag assembly containing the following:
6 – Screws
1 – Heater Wiring diagram
1 – Accessory Kit Label
Circuit breaker cover - 1 each
1 – Transformer (575V, 3-phase, 60Hz only)
Check equipment for shipping damage; if found, immedi-
ately contact the last carrier.
INSTALLATION
INSTRUCTIONS
ECB47 Series Units
ELECTRIC HEAT SECTIONS
508508-01
5/2024
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.
Electric Heat Section
The ECB47 series electric heat section provides field-in-
stalled electric heat for various air handler units. These
electric heat sections are available in either single- or
three-phase. Single-phase heat sections are equipped
with either terminal blocks or circuit breakers.
Refer to the model-specific air handler product specifica-
tion bulletin for heat section applications.
General Information
These instructions are a general guide and do not su-
persede local codes. Local authorities having jurisdiction
should be consulted before installation. Read these in-
structions thoroughly before starting installation.
Be sure to disconnect all power to the unit before you in-
stall and service this equipment. Use proper tools and pro-
tective equipment during installation and service.
Installation of air handler with or without optional electric
heat must conform with standards in the National Fire
Protection 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.
Page 1
WARNING
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Table of Contents
Related Manuals for Lennox ECB47 Series
Summary of Contents for Lennox ECB47 Series
- Page 1 WARNING Electric Heat Section Improper installation, adjustment, alteration, service The ECB47 series electric heat section provides field-in- or maintenance can cause property damage, personal stalled electric heat for various air handler units. These injury or loss of life. Installation and service must be...
-
Page 2: Circuit Breaker Installation
1 - Shut off all power to the air handler. More than one Heat Section Installation disconnect may be required. Before installing the electric heat section, check the unit 2 - Remove air handler access panel. rating plate to ensure that the unit meets the job require- 3 - Remove the electric heat knockout from the air ments, that proper electrical power is available, and that handler vestibule panel to accommodate the heater... - Page 3 C - Rotate the circuit breaker 180 degrees. IN DOWNFLOW APPLICATIONS, CIRCUIT BREAKERS MUST BE ROTATED 180º TO THE UP POSITION. D - Slide the circuit breaker back on the rail and secure in place with previously removed screw. 2 - The air handler access panels are factory supplied. There is a patch plate over the circuit breaker opening.
- Page 4 ECB47 12.5CB ECB47-4CB, ECB47 5CB, ECB47-6CB, PATCH PLATE ECB47 15CB ECB47 8CB, ECB47-9CB (SHIPPED INSTALLED ON AIR HANDLER) SIDE OF UNIT SIDE OF UNIT LONG SECTION PATCH PLATE SHOWN WITH LONGEST SECTION ON THE RIGHT SIDE. PATCH PLATE MAY BE FACTORY INSTALLED WITH LONG SECTION ON THE LEFT SIDE.
-
Page 5: Circuit Breaker Cover Installation
IMPORTANT Circuit Breaker Cover Installation If the air handler is installed in an unconditioned space the Confirm airtight seal between breaker cover and air provided circuit breaker cover must be installed. handler access panel. Apply a thin silicone bead to the adhesive back seat to ensure airtight seal. -
Page 6: Unit Start-Up
4 - Make wiring connections as follows: • Heaters equipped with fuses (460V, 3-Phase, 60Hz and 575V, 3-Phase, 60Hz) – Connect field • Heaters equipped with circuit breakers – Connect power supply wiring to fuse block. field power supply wiring to circuit breaker(s). •... - Page 7 Unit Field Wiring Diagrams FIGURE 11. Typical Unit Diagram – Air Handlers with Constant Torque Motors (P Voltage – 208-230V, 1-Phase, 60Hz) Page 7...
- Page 8 FIGURE 12. Typical Unit Diagram – Air Handlers with Constant Torque Motors – RDS Controller (P Voltage – 208-230V, 1-Phase, 60Hz) Page 8...
- Page 9 FIELD WIRING FOR UNITS FIELD WIRING FOR WITHOUT CIRCUIT BREAKERS UNITS WITH CIRCUIT BREAKERS CIRCUIT 2 CIRCUIT 4 CIRCUIT 3 CIRCUIT 2 EQUIPMENT GROUND EQUIPMENT EQUIPMENT EQUIPMENT GROUND GROUND GROUND CONNECT POWER WIRES FROM HEATER LABELED L1, L2, L3 ON G VOLTAGE UNITS TO TB2 THE NUMBER OF CIRCUITS VARY ACCORDING TERMINAL STRIP IN INDOOR UNIT TO HEATER MODEL.
- Page 10 FIELD WIRING FOR UNITS FIELD WIRING FOR WITHOUT CIRCUIT BREAKERS UNITS WITH CIRCUIT BREAKERS CIRCUIT 2 CIRCUIT 4 CIRCUIT 3 CIRCUIT 2 EQUIPMENT GROUND EQUIPMENT EQUIPMENT EQUIPMENT GROUND GROUND GROUND CONNECT POWER WIRES FROM HEATER LABELED L1, L2, L3 ON G VOLTAGE UNITS TO TB2 THE NUMBER OF CIRCUITS VARY ACCORDING TERMINAL STRIP IN INDOOR UNIT TO HEATER MODEL.
- Page 11 Electric Heat Wiring Diagram Cross Reference The following table provides a cross-reference for diagrams for specific electric heat models. TABLE 2 Electric Heat Section Model Wiring Diagram # ECB47-4(CB)-P 538453-01 ECB47-5(CB)-P 538453-01 ECB47-6(CB)-P 538453-01 ECB47-8(CB)-P 538454-01 ECB47-9CB-P 538455-01 ECB47-12.5CB-P 538456-01 ECB47-15CB-P 538456-01 ECB47-20CB-P...
- Page 12 Electric Heat Circuit Breaker/Fuse Ratings Single Phase Circuit Breaker Heat Size Voltage Breaker Size 4 kW 208/240V - 1 Phase 5 kW 208/240V - 1 Phase 6 KW 208/240V - 1 Phase 8 kW 208/240V - 1 Phase 9 KW 208/240V - 1 Phase 12.5 kW 208/240V - 1 Phase...
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