White-rodgers 24a34-001s1 Electric Heat Sequencer

Product Description

The WHITE-RODGERS 24a34-001s1 is a single-switch electric heat sequencer designed to stage electric heating elements and fan circuits in residential and light-commercial electric forced-air systems. It provides a controlled on-delay of 1 to 20 seconds and an off-delay of 40 to 110 seconds on switch M1-M2, preventing simultaneous element energization that would otherwise spike current draw and trip breakers. The unit is UL component recognized and is rated for ambient operating temperatures from -50 to 165 degrees F, making it suitable for both standard and harsh-environment installations. Licensed HVAC technicians are the primary installers of this component.

The 24a34-001s1 is used in electric furnaces, electric air handlers, and heat-strip assemblies where sequenced staging of resistance heating elements is required. It is rated at 14.0 amps FLA and 72.0 amps LRA at 120 Vac, and 7.0 amps FLA and 42.0 amps LRA at 240 Vac, covering the voltage ranges most common in residential electric heat applications. The 480 Vac rating at 12.5 amps also supports light-commercial heat-strip configurations. It serves as a direct replacement for most fan and heat sequencing functions in systems requiring a single-switch sequencer.

Key Features

• Single-switch (M1-M2) design with on-delay of 1 to 20 seconds and off-delay of 40 to 110 seconds
• Multi-voltage rating: 120 Vac, 240 Vac, and 480 Vac operation supported
• Resistive load ratings up to 3000W at 120 Vac and 6000W at 240 Vac or 480 Vac
• VA output of 125 VA at 120-240 Vac and 480 VA at 480 Vac
• Wide ambient operating range: -50 to 165 degrees F
• UL component recognized for code-compliant installations

Compatibility

Part of the 24A34 Series Electric Heat Sequencers product family. Designed as a direct OEM-style replacement for single-switch fan and heat sequencing applications in residential and light-commercial electric forced-air heating systems.

Installation Notes

Installation should be performed by a licensed HVAC technician. Always disconnect and lock out all electrical power to the air handler or electric furnace before removing or installing the sequencer. Verify that the replacement unit voltage and amperage ratings match the existing system requirements before wiring. Follow all applicable NEC guidelines for line-voltage component replacement in electric heating equipment.

Technical Specifications

• Switch Count: 1 (M1-M2)
• On Timing (M1-M2): 1 to 20 seconds
• Off Timing (M1-M2): 40 to 110 seconds
• Amperage at 120 Vac: 14.0 FLA, 72.0 LRA, 25.0 amps, 3000W Resistive
• Amperage at 240 Vac: 7.0 FLA, 42.0 LRA, 25.0 amps, 6000W Resistive
• Amperage at 480 Vac: 12.5 amps, 6000W Resistive
• VA Output: 125 VA at 120-240 Vac; 480 VA at 480 Vac
• Ambient Operating Temperature: -50 to 165 degrees F
• Length: 2.57 inches
• Height: 1.5 inches
• Width: 1.625 inches
• Approvals: UL Component Recognized
• Country of Origin: Mexico

Standard Information

• Brand: WHITE-RODGERS
• Manufacturer Part Number: 24a34-001s1