Jump to content
LIMITED TIME OFFER: Get up to $100 off tuition for Master Samurai Tech courses through November 30th ×
Click here to check out our structured, online appliance repair training courses for rookies and experienced techs.

FAQs | Repair Videos | Academy | Newsletter | Contact


DISCLOSURE: We may earn a commission when you use one of our coupons/links to make a purchase.

  • Upcoming Events

    • Appliantology Live Dojo, Saturday, 12/7/2024 @10 AM ET
      07 December 2024 03:00 PM Until 04:00 PM
      0  
      All Appliantology tech members are invited to join in the conversation for all things Appliantological: bidness, customers, tools, troubleshooting, flavorite brewski, whatever. Webcams and microphones are open and live!
      This event is also a great time for any students at Master Samurai Tech to bring any and all questions about the coursework. We're happy to walk through any concepts you're having trouble with. Think of it like office hours with your teachers. 
      Also, follow this Calendar Event so you'll get notified of new posts here. Look for the "Follow" button either at the top of the topic on desktop or below the topic on mobile.
      Who: This workshop is only available to tech members at Appliantology.
      When: Saturday, December 7 @10:00 AM Eastern Time.
      Where: Online via Zoom
      How:
      Click here to go to the forum topic with the registration link. If you're interested, register now. Arrive a couple minutes early to make sure your connection is working. Set a reminder for yourself for this workshop so you don’t miss it.  And check out past workshops here: https://appliantology.org/announcement/33-webinar-recordings-index-page/

Condenser Fan Speeds

John Hamblin

By John Hamblin
in DIY Appliance Repair Help

Recommended Posts

John Hamblin Samanera

John Hamblin

Posted
Posted

I am new to AC and there are usually two speeds mentioned when referring to the condenser fan - 825 and 1075 RPM. Is the fan speed related to the size of the unit-where a 825 would be on a 2 T and a 1075 on a 4 or 5 T. If not size, what determines the speed? Thank you.

  • Replies 4
  • Created
  • Last Reply
RegUS_PatOff Sensei

RegUS_PatOff

Posted
Posted

, what determines the speed?

the Engineer, and the Fan Blade size, number of Blades, pitch, etc ..
ACtechGUY Kohai

ACtechGUY

Posted
Posted

It has been my experience that you find low rpm motors with larger fan blades on higher end condensers. This results in a quieter unit. Tonage has no bearing on rpm selection.

applianceman18007260692 Sensei

applianceman18007260692

Posted
Posted

An 825 motor has more copper in it, is generally built to last a whole lot longer, costs a lot more, is quieter than than a 1075, and it would be a huge mistake to mount a 1075 in the place of an 825. The unit would not cool right.

  • 2 months later...
Bobice Sōhei

Bobice

Posted
Posted

A fan blade designed for a 825 rpm motor will usally have more pitch than a fan blade for a 1075 rpm motor.

Basically the motor pushes more air but slower with the 825 rpm motor.

If you try to use a 1075 motor and push that fan blade with more pitch it will overheat unless you were to really oversize the motor (1/4 to 1/3 not enought).

The bottom line is you need to have the RPM's of the new motor the same as the original motor.

825 RPM motors cost about twice as much as 1075 RPM motors.

Make sure to install the fan blade properly. If it is too far away from the motor it will generate more resistance, which will overload the motor even more.

Now with the 825rpm motor, the condenser should feel warm instead of burning hot

Archived

This topic is now archived and is closed to further replies.

Go to topic listing
×
×
  • Create New...