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White rectangular wall thermostat with horizontal or vertical mounting option

Dayton

Dayton 4PU47 Low Voltage Thermostat 20-30VAC Hardwired

SKU CH-462K-AXTSW MPN 4PU47

Controls gas, oil, electric heat and cool systems with hardwired 20-30VAC power and mercury-free operation

  • TypeLearning Thermostats
  • ColorWhite
  • Hardwired 20-30VAC power ensures reliable HVAC control
  • Heat-cool-off system switching with auto-on fan
  • Mercury-free design safe for gas, oil, electric systems
  • Horizontal or vertical mounting fits any installation
  • 50-90°F control range covers residential comfort needs

Hardwired 20-30VAC Thermostat

The Dayton 4PU47 is a low-voltage thermostat designed for hardwired installation on residential and light-commercial HVAC systems. It controls gas, oil or electric heating and cooling equipment with a single set of terminals. The mercury-free design suits owners who prefer a traditional wall control without wireless connectivity or learning algorithms. It operates on 20 to 30V AC supply from the system transformer.

Terminal Layout and Mounting Options

Terminal designations G, RC, RH, W and Y provide direct wiring for fan, power, heating and cooling circuits. The unit supports dual-transformer systems and 750mV millivolt applications such as gas fireplaces. A system switch selects heat, cool or off while a fan switch toggles auto and on modes. The case mounts horizontally or vertically on a standard wall box and measures within the listed height, width and depth.

Steady-State Temperature Control

The control range spans 50 to 90 degrees Fahrenheit and maintains the set-point continuously rather than cycling on a short timer. Automatic changeover is not included so the installer must set the mode manually for each season. The hardwired power method avoids battery replacement and keeps the display active during extended heating or cooling calls. It is not suited for installations that require remote scheduling or multi-zone coordination.

Highlights

  • Hardwired 20-30VAC power ensures reliable HVAC control
  • Heat-cool-off system switching with auto-on fan
  • Mercury-free design safe for gas, oil, electric systems
  • Horizontal or vertical mounting fits any installation
  • 50-90°F control range covers residential comfort needs

Specifications

BrandDayton
Model4PU47
TypeLearning Thermostats
ColorWhite

Questions about this item

Will the 20 to 30V AC hardwired power supply handle continuous heating cycles without voltage drop?

The thermostat is designed for hardwired 20 to 30V AC operation and works with dual transformer compatible systems, so the low voltage supply remains stable during sustained heating or cooling calls.

Does the unit run silently or produce audible clicks when the heat cool off switch cycles all day?

The mercury free design eliminates the mechanical click of older models, and the solid state switching for heat cool off and fan auto on operates silently during continuous daily use.

Which existing system wires must be present at the wall for the G RC RH W Y terminals to connect?

You need a low voltage system providing 20 to 30V AC with wires for fan G, power RC and RH, heating W and cooling Y, plus a dual transformer compatible supply if your installation uses separate heat and cool transformers.

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