MA RSD Ultrazone Motor

Post your questions and comments here.
Post Reply
ceceyeewc17
Posts: 1
Joined: Sat Nov 11, 2017 12:18 pm

MA RSD Ultrazone Motor

Post by ceceyeewc17 » Sat Nov 11, 2017 12:26 pm

My damper is attached to an auxiliary power source on my Carrier Infinity air handler. It is used for an Aprilaire dehu.(unsuccessfully I might add)
Recently when troubleshooting other issues, I touched the grey plastic cover and noted it to be warm. I removed the cover and the motor bell housing was actually fairly warm to touch, almost hot. Is this normal and should I disconnect it to prevent fire until further investigation? This is a vacation home and left unattended for weeks at a time.
Thanks

Ric
Site Admin
Posts: 20
Joined: Wed Mar 04, 2009 12:34 pm
Location: Englishtown, NJ
Contact:

Re: MA RSD Ultrazone Motor

Post by Ric » Mon Nov 13, 2017 7:37 am

This is normal for the RSD style motor. The RSD is a spring return motor. When power is applied it turns and when the power is removed the spring takes over and the blades return to their resting state. That is to say, the motor is always applying force while the power is applied. This generates heat which is dissipated by the metal motor body. There is no need for concern.

Post Reply