I have a 60 Overlander with dual 12v/120v fixtures and fans. I understand from reviewing this forum that the Univolt was added in 1964
, but some prior units were equipped with step-down transformers converting 120v AC to 19v AC for powering fan motors and other things.
I will almost certainly be converting to a modern smart charger system as part of a series of upgrades I am doing, but I wanted to fully understand what I have and whether it is working properly before I make final decisions and tear things out.
Behind a cabinet on the floor to the left of the "dresser drawers" on the curb side opposite the double bed, I have a Converter mounted on a shelf. The case has the following information: Phillips Power Converter, Model PC-151-M-2; input 120 volts AC 2.7 amps at 60 cycles; output 12.7 volts DC at 15 amps. There is a black rocker switch on top of the unit marked "Batt" and "City". Inside the back cover is a panel which says:
Blue wire is positive to RV 12v
motor and light circuits
Red wire is positive to RV Battery
White wire is negative to RV 12v
motor and light circuits. Also for
negative lead to RV battery.
My blue wire appears to be connected only to a lead running to the Suburban furnace. With the rocker switch in the "City" position, I measure 13.1 volts at the blue wire. In the "Batt" position there is nothing. I measure no voltage at the red wire, regardless of the switch position.
My questions are:
1) Was this Converter original equipment or installed by a PO?
2) There is a low humming noise from the Converter whenever I am plugged into shore power. This noise is very low, inaudible when the cabinet is closed, and remains the same regardless of the position of the switch. Is this normal?
3) Given there is a lead to the battery (Red wire), was this unit designed to provide battery charging as well?
4) Are the voltages I am measuring correct for this unit?
5) Would this unit have been installed solely to provide power for the furnace ignition?
Finally, if I install a smart charger, the best location for me will be under the bed where I have vented battery boxes for the AGM batteries. Any advice for easily getting to the circuits on the opposite side of the trailer where the Converter is mounted?
Sorry for the long post and thanks in advance for your help!