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©2017 Lennox Industries Inc.
Dallas, Texas, USA
THIS MANUAL MUST BE LEFT WITH THE
HOMEOWNER FOR FUTURE REFERENCE
WARNING
Electric Shock Hazard.
Can cause injury or death.
Foil-faced
insulation
characteristics similar to metal. Be sure there
are no electrical connections within 1/2ʺ
of the insulation. If the foil-faced insulation
comes in contact with electrical voltage, the
foil could provide a path for current to pass
through to the outer metal cabinet. While
the current produced may not be enough to
trip existing electrical safety devices (e.g.,
fuses or circuit breakers), the current can be
enough to cause an electrical shock hazard
that could cause personal injury or death.
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 INFORMATION FOR INSTALLER
CONFIGURE ELECTRIC HEAT
H
SETUP, ELECTRIC HEAT MUST BE MANUALLY CONFIGURED.
has
conductive
ECB38
H
INSTALLATION
INSTRUCTIONS
ECB38 Series Units
ELECTRIC HEAT SECTIONS
507805-01
12/2017
Shipping and Packing List
Package 1 of 1 contains:
1 – Assembled electric heat section
1 – Bag assembly containing the following:
Screws - 6 each
Wiring diagram - 1 each
Circuit breaker cover - 1 each
2 – Adhesive-backed foam seals
Check equipment for shipping damage; if found, immedi-
ately contact the last carrier.
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 WILL NOT OPERATE
IF IT IS NOT CONFIGURED (SET UP)
THROUGH THE AIR HANDLER
CONTROL (AHC).
SEE CONFIGURATION PROCEDURE,
FIGURE 12 ON PAGE 9.
®
OR iComfort
Page 1
WARNING
®
S30 INSTALLER
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Table of Contents
Related Manuals for Lennox ECB38 Series
Summary of Contents for Lennox ECB38 Series
- Page 1 INSTALLATION INSTRUCTIONS ©2017 Lennox Industries Inc. ECB38 Series Units Dallas, Texas, USA THIS MANUAL MUST BE LEFT WITH THE ELECTRIC HEAT SECTIONS HOMEOWNER FOR FUTURE REFERENCE 507805-01 WARNING 12/2017 Electric Shock Hazard. Shipping and Packing List Can cause injury or death.
- Page 2 L-BRACKET MOUNTING PLATE 9-PIN CONNECTOR CBA38MV AIR HANDLER CONTROL 30 AMP CONTACT RATING LENNOX CATALOG # 16B27 9-PIN CONNECTOR DETAIL B CONNECT WIRES TO DISCHARGE AIR SENSOR NOTE - EVENHEAT MODE CANNOT BE ENABLED WITH TERMINAL ON AIR HANDLER CONTROL.
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Page 3: General Information
The ECB38 series electric heat sections provide field-in- stalled electric heat for the CBA38MV series air handler unit. ECB38 electric heat sections are available in sin- gle-phase and three-phase voltages. -
Page 4: Circuit Breaker Installation
Circuit Breaker Installation CIRCUIT BREAKERS BLOWER ACCESS PANEL PATCH PLATE DISCARD CIRCUIT BREAKER SEAL PATCH PLATE BLOWER DECK CIRCUIT BREAKER BRACKET BREAK AT THIS POINT FIGURE 4. Circuit Breaker Seal and Patch Plate Installation PATCH PLATE ECB38-4CB, ECB38 5CB, ECB38 12.5CB ECB38-6CB, ECB38 8CB, (SHIPPED INSTALLED ON CB UNIT) ECB38 15CB, ECB38 20CB... -
Page 5: Discharge Air Temperature Sensor
The Air Handler Control (AHC) has two screw terminals marked Discharge Air Sensor. The sensor is REQUIRED for EVENHEAT operation, is field-mounted and must be ordered separately (Lennox Catalog # 88K38). The air handler control reads the discharge air tempera- FIGURE 7. Circuit Breaker Location... -
Page 6: Electrical Connections
TABLE 2. Recommended Blower Speed Tap Selection • Sends discharge temperature status message when operating in EVENHEAT mode. SPEED TAP SELECTION • Sends discharge air sensor temperatures to be dis- COOL HEAT played on the Air Handler Control when operating in BLOWER AC WITH HP WITH... -
Page 7: Configuring Unit
Configuring Unit This section identifies the requirements for configuring the air handler unit for unit size, heat mode selection, EVENHEAT operation and Heat Pump/Cooling Operations. Air Handler AIR HANDLER CONTROL (AHC) Control Checkout Power-up- Unit Size Code (Number or letter) displayed PUSH represents unit size code (air handler model size and capacity). - Page 8 AIR HANDLER CONTROL (AHC) Configuring Unit Size Codes (Model Number) PUSH Power-up - Unit Size Code (number or letter) BUTTON displayed represents unit size code (air handler model size and capacity). If three horizontal bars display, Air Handler Control (AHC) does not recognize unit size code (air handler model size and capacity).
- Page 9 Heat Mode Selection - AIR HANDLER CONTROL (AHC) Configuring / Detecting Electric Heat Sections PUSH BUTTON IMPORTANT: All electric heat installations require the Air Handler Control (AHC) to be manually configured to detect number of heat sections. NOTE - All field replacement AHC will require SINGLE CHARACTER configuring/detecting electric heat sections.
- Page 10 EVENHEAT Operation INPUTS OUTPUTS Target Discharge Air Target Discharge Air Target Discharge Air Room Thermostat Demand Temperature Set at 85ºF Temperature Set at 100ºF Temperature Set at 115ºF/130ºF Heat Pump First + First Electric Heat Pump First Stage Heat Pump First Stage Heat Section (H1) Heat Pump First and Second Stage + First Electric Heat Section (H1) +...
- Page 11 EVENHEAT Operation Note 1 Activation delay 120 seconds if one heat stage is activated or deactivated 150 seconds if more than one stage is activated Start Timer Delay or deactivated. (Note 1) Change in Heat Activate Y2 demand from room thermostat? Delay Timer Delay Timer Finished or last...
- Page 12 Electric Heat Wiring Diagram Cross Reference The following table provides a cross-reference for diagrams for specific electric heat models. TABLE 4 Electric Heat Section Model Wiring Diagram # ECB38-4-5-6-4CB-5CB-6CB-P 537951-01 ECB38-8-9-8CB-9CB-P 537955-01 ECB38-12.5CB-15CB-P 537960-01 ECB38-20CB-P 537962-01 ECB38-25CB-P 537963-01 ECB38-8-10-15CB-Y 537964-01 ECB38-20CB25CB-Y 537957-01 Page 12...