Firstco E143 Heat Sequencer 24V HVAC Electric Heating Control

The Firstco E143 is an OEM heat sequencer designed for electric heating systems in HVAC applications. This 24-volt sequencer controls the staged operation of heating elements, ensuring efficient and safe system performance by bringing heating components online in a controlled sequence.

Key Features:

• Model designation: 12SH22
• 24-volt control circuit voltage
• Delay on timing: 30-90 seconds
• Delay off timing: 1-35 seconds
• Controls heating element staging and blower motor operation
• Direct OEM replacement for Firstco HVAC systems
• Prevents system overload through timed sequencing

Heat sequencers are critical components in electric furnaces and air handlers, bringing heating elements online in stages to maximize efficiency, reduce electrical demand spikes, and extend equipment life. The E143 sequencer is engineered to meet Firstco's exacting standards for reliable operation in residential and commercial HVAC applications.