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Small transparent unit bearing motor with rear foot mount

Dayton

Dayton 4YFH2 Unit Bearing Motor 1/83 hp HVAC Control

SKU CH-3CHG-ZDX80

A shaded-pole unit-bearing motor rated at 1/83 hp, 115 V AC, 1,550 rpm and 0.62 A for HVAC control applications

  • ColorTransparent
  • Runs on standard 115 V AC supply
  • Low 0.62 A draw keeps circuits cool
  • 9 W output suits small HVAC tasks
  • Auto thermal protection prevents overheating
  • Cast iron frame handles 40 °C ambient heat

HVAC Unit Bearing Motor 1/83 hp

This Dayton unit bearing motor is a single-phase shaded-pole motor rated at 1/83 hp for HVAC control applications. It operates on 115V AC at 60/50 Hz with a nameplate speed of 550 RPM. The motor draws 0.62 A at full load and delivers 9 W of output power. It is designed for horizontal or vertical shaft-up mounting with a rear/foot cast-iron frame.

Practical limits of shaded-pole design

The shaded-pole topology provides low starting torque and fixed CCWLE rotation, so it suits only light fan or blower loads. Insulation class A and a 40 °C maximum ambient temperature restrict use to moderate environments. The 1.0 service factor offers no overload margin, and the non-standard frame prevents direct drop-in replacement for standard NEMA frames. Auto thermal protection resets automatically after a trip.

Installation notes and common issues

The 1/2 in. shaft length and rear/foot mounting simplify bracket alignment, but the non-standard frame often requires custom adapter plates. Wiring must match the single-phase 115V supply and the fixed CCWLE rotation; reversing leads will not change direction. Overheating typically follows operation above 40 °C ambient or restricted airflow through the totally enclosed air-over enclosure.

Highlights

  • Runs on standard 115 V AC supply
  • Low 0.62 A draw keeps circuits cool
  • 9 W output suits small HVAC tasks
  • Auto thermal protection prevents overheating
  • Cast iron frame handles 40 °C ambient heat

Specifications

BrandDAYTON
ColorTransparent

Questions about this item

Should I choose the 1/83 hp unit bearing motor or a different horsepower rating for my HVAC system?

Select the 1/83 hp motor when your equipment specifies this exact output; it delivers 9 W at 1550 RPM on 115 V AC.

What does the 1550 RPM nameplate speed mean once the motor is installed in my air handler?

The shaft will rotate at 1550 RPM under full load, driving the blower wheel at that speed when supplied with 115 V AC at 60 Hz.

How does the 115 V AC single-phase supply limit the motor's performance in practice?

The motor draws 0.62 A at full load on 115 V AC, so the circuit must provide that current without voltage drop to maintain rated torque.

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