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Dayton maroon HVAC control motor open air-over design

Dayton

Dayton 4YU34 HVAC Control Motor 1/8 HP 1550 RPM 115V 42Y OAO

SKU CH-D08B-B3JZQ

A direct-drive PSC blower motor delivering 1/8 HP at 1550 RPM on 115 V AC with three selectable speeds and auto thermal protection

  • Three-speed PSC motor adapts airflow to system needs
  • 1/8 HP at 1550 RPM delivers reliable blower power
  • Auto thermal protection prevents overheating during continuous duty
  • Open air-over enclosure suits direct-drive HVAC applications
  • Replaces multiple Dayton part numbers for easy retrofit

HVAC Control Motor for Blower Replacement

The Dayton 4YU34 is a direct-drive blower motor built for HVAC control applications. It uses a permanent split capacitor design and delivers 1/8 HP at 1550 RPM on 115V AC power. The 42Y frame size matches several common replacement part numbers including 4YC66, 4YC67, 5DVP6 and 5DVP7. It is not usable at 200V or 208V.

Thermals Noise and Power Draw

The motor draws 2.6 A at full load and carries automatic thermal protection for safe continuous duty. Insulation Class A supports a maximum ambient temperature of 40 degrees C. The open air-over enclosure relies on airflow from the blower wheel for cooling. It operates on 60 Hz single-phase supply with a service factor of 1.0.

Three-Speed Operation and Mounting

Three selectable speeds (1550, 1300 and 1050 RPM) allow airflow adjustment for different system requirements. The shaft rotates counter-clockwise when viewed from the shaft end. No capacitor, mounting hardware or wiring harness is included in the package. Installers must reuse existing components or source them separately.

How it compares

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

Price $159.99
Pricier than about 78% of the 1,762 comparable items (median $45.99).

Specifications

Product
Brand nameDAYTON

Questions about this item

How do I wire the three-speed PSC motor and which rotation must I set?

Connect 115 V AC to the common and the desired speed tap for 1550, 1300 or 1050 RPM; the shaft must turn CCWSE as viewed from the shaft end.

What part will need replacement first on this open air-over motor?

The internal run capacitor or the sleeve bearings typically wear out before the windings on a continuous-duty PSC blower motor.

At what ambient temperature does the auto thermal protection trip during continuous operation?

The motor is rated for a maximum ambient of 40 °C; sustained operation above that will cause the automatic thermal protector to shut it down.

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