Lennox Integrated Control Replacement Kit 23C48

Important Safety Information

[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] Disconnect power before servicing unit. Shut off main gas supplies to appliance until installation is complete.

[Warning] Protect the control from direct contact with water. If the control has been in direct contact with water, replace control.

[Warning] WHEN SERVICING CONTROLS, label all wires prior to disconnecting. Wiring errors can cause improper and dangerous operation. VERIFY proper operation after servicing.

Shipping and Packing List

Package 1 of 1 contains:

• 1 - Integrated control 107163-01
• 1 - Diagnostic label

Application

Use replacement kit 23C48 with furnaces equipped with constant torque indoor blower motors. This control is designed for use with a 120V ignitor only. Do not install this integrated control in a furnace equipped with a 70V or 95V ignitor.

Electrostatic Discharge (ESD) Precautions and Procedures

[Caution] Electrostatic discharge can affect electronic components. Take precautions to neutralize electrostatic charge by touching your hand and tools to metal prior to handling the control.

Installation Steps

1. Turn off electrical and gas supplies to the furnace.
2. Remove the access panel(s) to the blower compartment.
3. Label the wires before disconnecting the existing control.
4. Disconnect the wires and harness connectors from the existing control.
5. Remove the existing control from the control box.
6. Position the replacement control over the mounting holes and carefully snap control in place.
7. Reconnect the wires and harness connectors to the replacement control.
8. Affix the new label over the old label on the access panel.
9. Install access panel back to the blower compartment.
10. Restore electrical power and gas supplies to the furnace. Refer to the furnace installation instructions or sticker on the unit for start-up.

Wiring Diagrams

Typical 80% Efficient Furnace Wiring Diagram

This diagram illustrates the typical wiring for an 80% efficient furnace. Key components connect to the Integrated Control (A92) and other parts of the system:

• Room Thermostat (connects to R, W, Y, G, C terminals)
• Outdoor Unit
• Combustion Air Inducer Motor
• Gas Valve (GV1)
• Transformer (T1)
• Indoor Blower Motor (B3)
• Flame Sensor
• Ignitor (R33)
• Limit Switches: Primary Gas Limit (S10), Combustion Air Proving Switch (S18), Flame Rollout Switch (S47), Secondary Gas Limit (S21)
• Door Interlock (S51)

Jack/Plug Chart:

• J.P48: JACK/PLUG-INDOOR BLOWER-POWER
• J.P49: JACK/PLUG-INDOOR BLOWER-SPD TAP
• J.P58: JACK/PLUG-BURNER CONTROL
• J.P84: JACK/PLUG-COMB AIR INDUCER
• J.P135: JACK/PLUG-SECONDARY LIMIT (S)
• J.P156: JACK/PLUG-INDUCER/IGNITER
• J.P159: JACK/PLUG-IGNITION

Important Notes:

• If any wire in this appliance is replaced, it must be replaced with wire of like size, rating, insulation thickness and termination.
• 'R' required on some outdoor units.
• Park terminals are unpowered terminals. All unused motor leads must be wired to a park terminal.
• Do not use red (low speed) motor lead for heating speed on 045(X)E36A, 070(X)E36B, 110(X)E60C and 135E60D units, as resulting temperature rise will be outside of the rise range.
• L13 Power Choke used on 1 HP and higher only.
• Use copper conductors only.

Typical 90% Efficient Furnace Wiring Diagram

This diagram illustrates the typical wiring for a 90% efficient furnace. It includes components similar to the 80% efficient model, with the addition of:

• Circuit Breaker (CB8)
• Low Gas Pressure Switch (S145)

General notes regarding wire replacement, park terminals, motor leads, power chokes, and conductor types are also applicable. The S145 switch is used with Honeywell Gas Valves when applied in LP gas units.