Name: Lennox CBX40UHV Series
Brand: Lennox
Rating: 4 (1 reviews)

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Page 53

CBX40UHV

ELECTRIC HEAT DIAGRAMS AND SEQUENCE OF OPERATIONS

ECB40-2.5, -4, -5 and ECB40-4CB, -5CB 208/230V Single-Phase - Sequence of Operation

1. W1 of the thermostat provides a W1 demand to the AHC. The AHC outputs a 22VDC signal to the K32 relay. K32-1 closes.

2. Assuming the N.C. primary (S15) and secondary (S20) limit switches are closed, electric heat element HE1 is energized.

Table of Contents1
Electrical Data2
Model Number Identification2
General Data2
Specifications / Electrical Data2
- Cbx40Uhv024 Blower Performance3
- 0 Through 0.80 In. W.g. External Static Pressure Range4
Parts Arrangement8
- CBX40UHV Control Box9
- Control Box9
Application9
Unit Components9
- Plastic Drain Pans10
- Coil10
- Air Handler Control (AHC)10
- Discharge Sensor (DAT)10
- Cbx40Uhv Air Handler Control11
- 9-Pin Connector11
- 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
- Delay Profile 317
- Delay Profile 117
- Push Button17
Air Handler Control Button, Display and Jumpers17
- 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
- Indoor Blower Motor (B3) Control Connections (Emerson)23
- Module Test (Emerson)23
- Additional Indoor Blower Motor (B3) Troubleshooting23
- J48 Test24
- J49 Test (Emerson)24
- Match-Ups and Ratings25
- Electric Heat Components25
- Circuit Breaker25
Optional Ecb40 Electric Heat25
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
- Turning DEHUMIDIFY on or off31
- BASIC Mode31
- AUX Mode31
- PRECISION Mode31
- 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
- Horizontal Right-Hand Discharge Application38
- CBX40UHV Cabinet38
- Down-Flow Application38
Application Configuration Modifications38
- 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
- Filters42
- Supply Air Blower42
- Electrical42
Maintenance42
Air Handler Control (AHC) Checkout43
Configuring Unit Flow Charts43
- 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
- Cbx40Uhv - 208/230V Single Phase - Sequence of Operation52
Unit Diagram52
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

Lennox CBX40UHV Series User Manual

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Brand	Lennox
Model	CBX40UHV Series
Category	Air Handlers
Language	English