new shurflo pump, wiring ?

[biopig]

on our 64 overlander we have the factory univolt and par pump. Is the par pump powered by 19 volts? how do i wire in my 12 volt shurflo pump. thanks for your help. Also have new water heater to install!!

[TG Twinkie]

Where did you come up with 19 volts? Are you reading it from the univolt? Is there a battery in the trailer?

[tkasten]

I replaced the pump on my 65 Safari with a Surflo on demand. Just hooked up the same wires and everything works fine. It is normal 12 volt wiring.....Tim

[biopig]

I believe the 64 univolt provided 18.5 volts to the pump and furnace. Atleast thats what I've read on several posts. Hoping there's an easy fix.

[3Ms75Argosy]

Have you replaced your Univolt at all? If not, now's a good time to change over... fix two birds with one ... uh.. stone? That Univolt is HEAVY!

HOWEVER, I thought the early years (my '63 included) didn't have a converter, but rather step down transformers for converting 110 to 12V AC, not DC. If this is the case, you might want to run a positive and negative line to your pump from your battery, putting a fuse in line..
Marc

[gwchitty]

I still have my original Univolt set-up in my 65 Caravel. Yes,my pump and the fans run on about 19 volts AC. The shorepower 120VAC goes into a heavy step-down transformer and two wires emerge: 12VAC and 19VAC. I have 2 switches to throw to go from shore power to battery - one for each voltage feed. The original pump and fans run equally well on 12VDC or 19VAC. I don't expect that your new pump will work on AC at all though. As another poster suggested, you can run it directly off the battery. I can't because my AC Univolt set-up doesn't charge the battery. The Caravel didn't get a rectifier to make DC out of the AC circuit.

Anyway, I like the Univolt transformer hum. OK I lied there, eventually I will change to Intellipower.

[biopig]

Thanks for the advise everybody. I think I'll run it from the battery until I have the funds to upgrade the electrical system. I still have alot to learn about our trailer, she's only bin in the family for about 5 months.