[DeTomaso] Flex-a-lite question

[Julian Kift]

Given that there are two distinct Flex-a-lite parts #'s I would assume the puller and pusher have different fan blades optimized for their respective duty, what the two units likely have in common is the electric motors and their wiring of std color coding. As written below the wiring instructions are unique to each part # simply indicating the puller rotates in the opposite direction to the pusher, which if you think about it is perfectly sane as the face of the unit is turned 180 degrees as a pusher in front of the radiator when compared to a puller behind it.
Julian

To: detomaso at poca.com
From: fresnofinches at aol.com
Date: Sun, 23 Feb 2014 14:04:51 -0500
Subject: [DeTomaso] Flex-a-lite question

All,
 
I've come to the conclusion the Hall Pantera Meriah fans are getting tired and are not up to the task of slow traffic cooling.
 
I say this because in Summer/Winter I now always see a large jump in temp when I get into city traffic versus highway travel. 20-30 degrees jump. Wasn't always that way.
 
I would rather not remount the three-pass Quella/Ron Francis radiator for sucker fans, so I'm looking at pushers.
 
Felx-a-lite offers model 440 as a pusher. 2500 cfm, S-blades, etc.
 
But I noted the online-available PDF installation sheet groups the 440 pusher and the 420 puller in the same section.
 
It instructs the 420 puller to be wired red/red and black/black, fan to power source. And to reverse the wiring to red/black and black/red for the 440 pusher model. This tells me the fan blades are expected to perform whether rotating CW or CCW. But I've always heard blades are
optimal for one direction only, and show reduced efficiency when rotating opposite to the intended function.
 
I will try to talk with a Flex-a-lite tech about this on Monday, but in the meantime I'm asking for any of your ideas, thoughts and suggestions.
 
Thanks,
 
Larry
 
......and no, I don't know why my emails (at least in the archives) are now getting duplicated by the List software.

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   Given that there are two distinct Flex-a-lite parts #'s I would assume
   the puller and pusher have different fan blades optimized for their
   respective duty, what the two units likely have in common is the
   electric motors and their wiring of std color coding. As written below
   the wiring instructions are unique to each part # simply indicating the
   puller rotates in the opposite direction to the pusher, which if you
   think about it is perfectly sane as the face of the unit is turned 180
   degrees as a pusher in front of the radiator when compared to a puller
   behind it.
   Julian
   To: detomaso at poca.com
   From: fresnofinches at aol.com
   Date: Sun, 23 Feb 2014 14:04:51 -0500
   Subject: [DeTomaso] Flex-a-lite question
All,

I've come to the conclusion the Hall Pantera Meriah fans are getting tired and a
re not up to the task of slow traffic cooling.

I say this because in Summer/Winter I now always see a large jump in temp when I
 get into city traffic versus highway travel. 20-30 degrees jump. Wasn't always
that way.

I would rather not remount the three-pass Quella/Ron Francis radiator for sucker
 fans, so I'm looking at pushers.

Felx-a-lite offers model 440 as a pusher. 2500 cfm, S-blades, etc.

But I noted the online-available PDF installation sheet groups the 440 pusher an
d the 420 puller in the same section.

It instructs the 420 puller to be wired red/red and black/black, fan to power so
urce. And to reverse the wiring to red/black and black/red for the 440 pusher mo
del. This tells me the fan blades are expected to perform whether rotating CW or
 CCW. But I've always heard blades are
optimal for one direction only, and show reduced efficiency when rotating opposi
te to the intended function.

I will try to talk with a Flex-a-lite tech about this on Monday, but in the mean
time I'm asking for any of your ideas, thoughts and suggestions.

Thanks,

Larry

......and no, I don't know why my emails (at least in the archives) are now gett
ing duplicated by the List software.

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