DC blower [RE-wrenches]

[Allan Sindelar]

Jay,
    No, if anything it was undersized. The blower was rated 5.1A @12VDC and
1875 rpm with 0.0" static pressure. We used a VLX53, as I recall, with an
LCB. A snap-disc thermostat in the collector and a room thermostat in the
room served as a crude but effective differential controller. We wanted a
gentle flow, that corresponded roughly to thermal gain in the collector.
    The problem started early on--The rotor would rub so slightly against
the cage, so it wouldn't start easily at low input power levels. It would
bind up as clouds passed, requiring a tap to restart. Compared to the AC
unit it replaced, it was pretty anemic to the client. It was built too
cheaply (riveted motor assembly, pressed-steel housing, etc.) to adjust or
correct the problem.
Allan

----- Original Message -----
> I am guessing the life span was short because the panel was too big,
therefore
> running the motor at high speed.  Unless you were using the LCB as a high
> voltage control?

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