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Transparent cast-iron ECM motor with stud mounting, horizontal or vertical shaft down

Em&S

Em&S UTBEC1551BJ1 hvac control 1/15 hp ECM motor

SKU CH-ZP1G-R121A

ECM unit bearing motor runs at 550 RPM with 1/15 hp output for HVAC systems

  • ColorTransparent
  • ECM design delivers efficient 50 W output
  • Single-phase 115 V AC supply simplifies wiring
  • Auto thermal protection guards against overheating
  • Cast-iron frame withstands 40 °C ambient
  • Stud mount fits horizontal or vertical shaft-down orientation

Motor type and purpose

The Em&S UTBEC1551BJ1 is a unit bearing ECM motor rated at 1/15 hp for HVAC control applications. It delivers 50 W output at 115 V AC with a nameplate speed of 550 RPM and a single-speed design. The motor suits equipment requiring a compact, constant-speed drive in residential or light-commercial air-handling units.

Thermals, noise and power draw

The motor draws 1.2 A at full load and operates within a maximum ambient temperature of 40 °C. Its totally enclosed air-over enclosure and Class B insulation manage heat without external ventilation. Auto thermal protection shuts the winding down if internal temperatures exceed safe limits, reducing the risk of nuisance tripping during normal operation.

Sustained-load behaviour

Under continuous duty the ECM design maintains the 550 RPM set-point without the speed drop common in shaded-pole alternatives. The cast-iron frame and stud mounting resist vibration during long run cycles. Horizontal or vertical shaft-down orientation is supported, but the motor is not usable at 200 V or 208 V, so voltage must remain at 115 V for reliable sustained performance.

Highlights

  • ECM design delivers efficient 50 W output
  • Single-phase 115 V AC supply simplifies wiring
  • Auto thermal protection guards against overheating
  • Cast-iron frame withstands 40 °C ambient
  • Stud mount fits horizontal or vertical shaft-down orientation

Specifications

BrandEM&S
ColorTransparent

Questions about this item

How do I install the stud-mounted motor so the shaft rotation stays CWLE?

Mount the motor horizontally or with the shaft pointing down using the stud pattern on the cast-iron frame, then verify the shaft turns clockwise when viewed from the lead end before securing the fan or blower wheel.

What maintenance does the totally enclosed air-over ECM motor require over its service life?

Keep the air-over cooling path clear of dust and debris; the auto thermal protection and Class B insulation need no lubrication, but blocked airflow will trip the overload.

At what ambient temperature does the motor hit its thermal limit first during continuous operation?

The maximum ambient temperature is 40 °C; sustained operation above that will cause the auto thermal protection to cycle the motor off.

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