Nuway Berger STM30 B2 37/6 Damper Motor A30046Z

The Nuway A30046Z is a Berger Lahr STM30 B2.37/6 damper motor used on oil-fired Nu-way boiler plant. It drives the air damper on the burner, positioning it to suit the firing stage so combustion air matches the fuel being burned. The unit is listed with a 220 V designation in the catalogue and as 230 V 50 Hz in supplier data.

• The burner locks out because the damper does not move to the correct position on a call for heat
• The damper motor runs but the damper spindle does not travel, or travels only part of its stroke
• Buzzing, humming or stalling from the motor instead of smooth rotation
• Intermittent lockouts that clear on reset and return once the burner cycles again
• Visible scorching, a burnt smell or a slack, worn linkage at the motor

• Read the label on the existing motor and confirm it matches STM30 B2.37/6
• Confirm the supply voltage and frequency at the appliance against the motor rating
• Check the damper spindle and linkage for free movement and correct coupling before condemning the motor
• Confirm the appliance model against the manufacturer's parts list for your burner