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View Full Version : how hot should main pump motor be?


SilverLeaf
03-26-2018, 11:39 PM
Fired up my new homebuilt RO for the first time tonight. Having a few problems, one of which is that I suspect that the motor (3/4HP running a procon 240GPH pump) is overheating. How hot should it be? After running for awhile I can barely touch it. Adding to my suspicion is that it won't run for more than a minute without shutting itself off (although I can't rule out improper wiring of the high/low pressure shutoff switches as the culprit there).
ronintank
03-27-2018, 06:11 AM
I run a 3/4 hp carbonator motor on a procon 240 pump the motor runs fine just warm not hot to the touch.
If this is the first time starting it up with a new motor, it may be the wiring.
My new carbonator motor came wired for 220v and i had to switch the wires around to the 120 volt configuration.
maple flats
03-27-2018, 07:45 AM
What pressure are you running at?
SilverLeaf
03-27-2018, 08:28 AM
Running only at 50psi at the moment, so definitely not overdoing it. Just doing the initial membrane flush.

I was wondering about the motor wiring - (this one can go btwn 110 and 220 too) - but I did have an electrician hook that up so was assuming it was ok... maybe not?
halladaymaple
03-27-2018, 08:43 AM
Dont run the motor if it gets that hot. Does it trip ? Have it checked again for proper Voltage. No way your motor should be that hot with a 240 GPH procon pump. Even after 5 hours of use, mine is warm but that's it


Good luck.
mkoehler79
03-27-2018, 05:35 PM
From the procon pump datasheet a 240 gph pump requires .87 HP at 250 psi. Mine would trip after sometime running above 220 with .75 HP motor. I went to 1 HP and now have no problems. At 50 psi, you may want to check wiring again or maybe coupler connection may be binding?
SilverLeaf
03-30-2018, 12:36 AM
Update: had the electrician out, he checked wiring over and it was all fine. He thinks I just got a defective motor (he could actually see smoke coming out of it). Got another one ordered so we'll see! Dang I could sure use the RO right now, we are drowning in sap at the moment!
SilverLeaf
04-06-2018, 12:12 AM
Final update: it was indeed a bad motor. Got a new one, swapped it in today. Crankin' along just fine now!