Diversitech HS24A345 Dpst Spst Solid State Heat Sequencer

Product Description

The DIVERSITECH HS24A345 is a solid-state DPST/SPST heat sequencer designed to stage electric heating elements in residential and light commercial heating equipment. It replaces conventional bimetal sequencers with a shock- and vibration-resistant solid-state design that delivers consistent on and off timing across a wide range of ambient conditions. Contact ratings reach up to 25 amps at 120 or 240 volts, and 12.5 amps at 480 volts. Full-load rated auxiliary contacts are included. The unit mounts in any position and uses quick-connect terminals for straightforward field installation.

The HS24A345 is suited for electric furnaces, air handlers, and packaged heating equipment where staged element sequencing is required. The on and off timing range of 1 to 110 seconds (M1-M6) provides flexible staging across multiple heating elements. It performs reliably across an operating ambient range of -50 degrees F to 165 degrees F, making it appropriate for both conditioned mechanical rooms and unconditioned utility spaces. HVAC technicians working on staged electric heat systems will find this a direct-fit solid-state replacement for worn or failed bimetal units.

Key Features

• Solid-state construction eliminates bimetal contact wear and improves long-term reliability
• Contact rating up to 25 amps at 120 or 240 volts and 12.5 amps at 480 volts
• Adjustable on/off timing of 1 to 110 seconds across M1-M6 contacts
• Full-load rated auxiliary contacts included
• Quick-connect terminals reduce field wiring time
• Mounts in any position for flexible installation
• Wide operating ambient range: -50 degrees F to 165 degrees F

Compatibility

Designed as an OEM-style solid-state replacement heat sequencer for electric furnaces, air handlers, and packaged heating equipment that use DPST or SPST staged sequencer controls.

Installation Notes

Installation should be performed by a licensed HVAC technician. Disconnect and lock out all electrical power to the unit before removing the existing sequencer or making any wiring connections. Quick-connect terminals should be fully seated and inspected for secure engagement before restoring power. Local electrical codes and NEC requirements apply to all wiring and overcurrent protection associated with electric heating equipment.