Table Of Contents - Lennox CBX40UHV Series Installation And Service Procedure

Table of Contents

Table Of Contents1
Model Number Identification2
Specifications / Electrical Data2
General Data2
Electrical Data2
Cbx40Uhv­024 Blower Performance3
0 Through 0.80 In. W.g. External Static Pressure Range4
Parts Arrangement8
Application9
Unit Components9
Cbx40Uhv Control Box9
Control Box9
Plastic Drain Pans10
Coil10
Air Handler Control (Ahc)10
Discharge Sensor (Dat)10
9-Pin Connector11
Cbx40Uhv Air Handler Control11
Component Connections12
Field Wiring — Cooling Application13
Field Wiring — Heat Pump13
Cooling Application14
Heat Pump Application14
Thermostat Connections15
Air Handler Control Connections16
Thermostat Wire Length16
Run Length — Communicating16
Run Length — Non-Communicating16
Air Handler Control Button, Display And Jumpers17
Push Button17
Delay Profile 117
Delay Profile 317
Cbx40Uhv Jumper & Link Guide18
Jumper & Link Guide19
Internal Operation20
Blower Motor Components20
Initial Power Up20
Variable Speed Ecm Blower Motor20
Check Power To Motor21
Regal-Beloit — Blower B3 Harness21
Indoor Blower Motor (B3) Control Troubleshooting (Emerson)22
Regal-Beloit — Troubleshooting22
Typical Digital Multimeter22
Additional Indoor Blower Motor (B3) Troubleshooting23
Module Test (Emerson)23
Indoor Blower Motor (B3) Control Connections (Emerson)23
J48 Test24
J49 Test (Emerson)24
Optional Ecb40 Electric Heat25
Match-Ups And Ratings25
Electric Heat Components25
Circuit Breaker25
Optional Humidity Control25
Ecb40-9Cb P Voltage Shown26
Electric Heat26
Electric Heat Data - Cbx40Uhv-024 And Cbx40Uhv-03027
Electric Heat Data - Cbx40Uhv-03628
Electric Heat Data - Cbx40Uhv-042, Cbx40Uhv-048, And Cbx40Uhv-06029
Optional Humidity Control (A20)30
Principles Of Cooling With Drier Air30
Basic Mode31
Precision Mode31
Aux Mode31
Turning Dehumidify On Or Off31
Setting Humidity Offset32
User Control Of Humidification / Dehumidification32
User Control Of Humidification32
User Control Of Dehumidification32
Unit Sequence Of Operations33
Ahc System Status Codes35
Ahc Configuration, Test And Error Recall (Fault And Lockout) Function35
Configuring Electric Heat Sections35
Indoor Blower Test35
Unit Status And Alarm Codes35
Ahc Single Character Display — Error Codes36
Application Configuration Modifications38
Cbx40Uhv Cabinet38
Down-Flow Application38
Horizontal Right-Hand Discharge Application38
Horizontal Left-Hand Discharge Application39
Suspending Horizontal Unit39
Left-Hand Discharge Configuration39
Overflow Drain40
Condensate Drain40
Best Practices40
Main Drain40
Preliminary And Seasonal Checks41
Cooling Start‐Up41
External Static Pressure41
Heating Start‐Up41
Start-Up Operation41
Operating Characteristics41
Maintenance42
Filters42
Supply Air Blower42
Electrical42
Configuring Unit Flow Charts43
Air Handler Control (Ahc) Checkout43
Configuring Unit Size Codes (Model Number)44
Configuring/Detecting Electric Heat Sections45
Evenheater Operation46
Evenheat Operation47
Heat Pump Operation48
Air Handler Control Ahc) Indoor Blower Mode Speed/Profiles Settings48
Single Or Two-Stage Unit48
Cooling Operation49
Error Code / Recall Mode50
Blower Test Mode51
Unit Diagram52
Cbx40Uhv - 208/230V Single Phase - Sequence Of Operation52
Electric Heat Diagrams And Sequence Of Operations53
Ecb40-6 And Ecb40-6Cb 208/230V Single-Phase Sequence Of Operation54
Ecb40‐8 And Ecb40-8Cb - 208/230V Single-Phase Sequence Of Operation55
Ecb40‐9Cb - 208/230V Single-Phase Sequence Of Operation56
First-Stage Heat56
Second-Stage Heat56
Ecb40-12.5Cb, ‐15Cb - 208/230V Single-Phase Sequence Of Operation57
Ecb40‐20Cb - 208/230V Single-Phase Sequence Of Operation58
Ecb40‐25Cb - 208/230V Single-Phase Sequence Of Operation59
Three-Phase Sequence Of Operation61