Dayton
Dayton 2NNT1 Line Volt Mechanical Thermostat SPDT 24-600VAC
A line-voltage mechanical thermostat with SPDT switching for 24–600 VAC heating and cooling circuits
- Type2 Stage Heating/Cooling
- Controls heating and cooling from 30 °F to 110 °F
- SPDT switch handles 16 A at 120 VAC and 8 A at 240 VAC
- Operates on 24 VAC to 600 VAC line voltage
- 5 °F differential prevents short cycling
- Two-stage operation for precise temperature management
Dayton 2NNT1 Line Volt Mechanical Thermostat
The Dayton 2NNT1 is a line-voltage mechanical thermostat built for controlling heating and cooling equipment in residential or light commercial bath ventilation systems. It suits installers who need a simple, non-programmable switch that operates directly on the supply voltage without a separate transformer.
Thermals noise and power draw
The thermostat itself consumes negligible power and adds no audible noise to the installation. It switches loads up to 16 A at 120 VAC and 8 A at 240 VAC across a 24 to 600 VAC range, with a fixed 3.5-degree differential that prevents short-cycling of the connected fan or heater.
Build fit and wiring
The compact 4 1/2 by 2 1/8 inch body fits standard junction boxes and leaves wiring space for the two SPDT switches that open or close on temperature rise. No remote sensing bulb is included, so the unit must be mounted where it can sense the ambient air directly, and it does not support programmable schedules or multi-stage sequencing beyond its two switches.
Highlights
- Controls heating and cooling from 30 °F to 110 °F
- SPDT switch handles 16 A at 120 VAC and 8 A at 240 VAC
- Operates on 24 VAC to 600 VAC line voltage
- 5 °F differential prevents short cycling
- Two-stage operation for precise temperature management
Specifications
| Brand | DAYTON |
|---|---|
| Type | 2 Stage Heating/Cooling |
Questions about this item
How is the Dayton 2NNT1 wired for line-voltage control, and which step is often missed?
Connect the two SPDT switches between the 24–600 VAC supply and the load, observing the 16 A at 120 V or 8 A at 240 V ratings; the step often missed is setting the 3.5 °F differential before final mounting.
What maintenance or replacement will the thermostat need over time?
The mechanical contacts can wear after repeated cycling; plan to replace the unit if the 30–110 °F range drifts or the switches fail to open/close on rise reliably.
What limit appears first during sustained high-load operation?
The 16 A full-load rating at 120 VAC (8 A at 240 VAC) is the limiting factor; exceeding it will cause contact overheating before the temperature range is reached.
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