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Dayton 31TU25 three-phase HVAC motor open drip-proof enclosure

Dayton

Dayton 31TU25 HVAC control motor 3-phase 208-230/460V 1-1/2 HP

SKU CH-X4EZ-FK3TK

Three-phase HVAC motor rated 1-1/2 HP at 208-230/460 V with 3,525 RPM and inverter-ready operation

  • Three-phase power delivers smooth, efficient operation
  • Dual voltage 208-230/460V fits multiple supply systems
  • 1-1/2 HP output drives demanding HVAC loads
  • 3,525 RPM nameplate speed matches fan requirements
  • Inverter rated for variable-speed control flexibility

Product identity

The Dayton 31TU25 is a three-phase general-purpose motor rated at 1-1/2 HP for HVAC control applications. It operates on 208-230/460V AC at 60 Hz and suits installers who need a single-speed drive with a 143-5TC/56HCZ frame and keyed shaft.

Thermal and electrical behaviour

Continuous duty is supported up to a maximum ambient temperature of 104 degrees F with insulation class F and a 1.15 service factor. Full-load current draws 3.8 amps at 230V or 1.9 amps at 460V, and the open dripproof enclosure provides no dedicated thermal protection.

Build integration

Face and base mounting allows all-angle installation, while clockwise or counter-clockwise rotation is selectable on site. The inverter-rated design suits variable-frequency drives, and the 525 RPM nameplate speed matches typical fan or pump loads. Buyers who need integrated overload protection or a totally enclosed enclosure will need a different motor.

How it compares

Measured against everything we stock in Heating & Cooling Controllers, at today’s prices. Recalculated every night.

Price $262.99
Pricier than about 88% of the 1,762 comparable items (median $45.99).

Specifications

Product
Brand nameDAYTON

Questions about this item

How is the 143-5TC/56HCZ face/base motor mounted and what alignment step is often missed?

Bolt the motor to the driven equipment using the face and base holes, then verify the keyed shaft aligns with the coupling before tightening to prevent vibration.

Which components will need replacement during the life of this 1.15 service-factor motor?

The open dripproof enclosure exposes bearings to dust and moisture, so plan to replace the bearings and shaft seal periodically.

What thermal limit appears first when this Class F motor runs continuously at 104 °F ambient?

The winding insulation reaches its temperature ceiling before the motor trips, since no internal thermal protection is fitted.

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