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Source 1 S1-24A34-4 is an electric heat sequencer for 24 V HVAC and electric heat control. The unit provides two-switch sequencing with a single timing control and adjustable on/off intervals. On timing ranges from 30 to 90 seconds and off timing ranges from 1 to 30 seconds. The sequencer is supplied in a compact metal housing and is referenced with Zettler in the model listing.
24 V two-switch heat sequencer with adjustable 30–90s on and 1–30s off timing for HVAC electric heat control
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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