Heat pump condensor fan question
#1
Member
Thread Starter
Join Date: Jan 2016
Location: usa
Posts: 11
Upvotes: 0
Received 0 Upvotes
on
0 Posts
Heat pump condensor fan question
Hey guys,
I need to replace the fan on my Bryant heat pump. It's a 3 blade CW with a 34 degree pitch. On the pitch, can I go with a 36 degree pitch or one that has a 32 or 33 degree pitch? Or is that too far off specification? It's much cheaper to buy the one with the 36 degree pitch than the OEM one. Thanks for your advice.
I need to replace the fan on my Bryant heat pump. It's a 3 blade CW with a 34 degree pitch. On the pitch, can I go with a 36 degree pitch or one that has a 32 or 33 degree pitch? Or is that too far off specification? It's much cheaper to buy the one with the 36 degree pitch than the OEM one. Thanks for your advice.
#2
That's a good question and not one that I can answer for you. Theoretically it would seem that the greater pitch would move more but at the same time it will put more load on the motor.
My forum partner, Houston, may know.
My forum partner, Houston, may know.
#3
Member
Thread Starter
Join Date: Jan 2016
Location: usa
Posts: 11
Upvotes: 0
Received 0 Upvotes
on
0 Posts
Each fan has the minimum HP rating it can be used with. The 36 pitch can be used with a min. 1/5 hp motor @1100 RPM CW rotation. The motor on my condenser is a 1/4 hp at 1075 RPM reversible motor.
Last edited by RobinH; 03-18-16 at 02:47 AM.
#4
The condenser fan motor was probably pulling the FLA rating with the original fan blade.
I would choose less pitch over more pitch to reduce the chances of the motor dropping out.
Matching the pitch of the original blade would be a much better idea. Decreasing the pitch would likely increase head pressure and compressor amperage. Increasing the pitch would increase fan motor amperage and those things are usually maxed out.
I would choose less pitch over more pitch to reduce the chances of the motor dropping out.
Matching the pitch of the original blade would be a much better idea. Decreasing the pitch would likely increase head pressure and compressor amperage. Increasing the pitch would increase fan motor amperage and those things are usually maxed out.
#5
Member
Thread Starter
Join Date: Jan 2016
Location: usa
Posts: 11
Upvotes: 0
Received 0 Upvotes
on
0 Posts
Thanks Houston 204! I'll take your advice. The OEM fan is still available. So I'm going to buy that and install it instead of taking chances on a different fan. Thanks again.