We picked up a 1972 Boler a few years ago that's had a lot of work done to it.
My question is regarding the power converter (if that's the correct term?). It has two unlabelled switches on it (the black 'buttons' are fuses), but I have no idea what they do. The top switch seems to turn a fan on and the DC Volts drops to around 11.5, the bottom switch seemingly does nothing unless hooked up to a 120v power source, where it then kicks on a fan in high gear.
Switching both on, moves the battery condition needle to the '1' position, with the DC volts needle bumping up to 15 volts.
All the lights hooked up to the battery seem to have power regardless of the switch positions.
Any insight would be greatly appreciated!
I have a ‘72 boler also. This doesn’t look original to the boler, so doubt anyone can answer.
Also, three Facebook boler page is best of all boler related questions. The best boler repair people hang out there..
I don’t know what the battery condition meter means.
From the rest of your description it sounds like the bottom switch is an on/off switch for the converter — if it’s on then the converter is providing 15V DC charging current from AC.
The top switch sounds like a battery disconnect, but I don’t know why there would be a fan for that. Maybe a DC/DC charger for charging the starter battery, but at that age that would be weird; normally they just have a direct connection between the batteries somewhere. Maybe a master switch for turning off the DC loads driven by those five fuses? But again, don’t know why there would be a fan involved with that…
Source: 1972 Boler Question
