John Clanton <jclanton@...>
The 55 has the same Square D pressure switch. If the pressure drops below a certain level, one must manually engage, and hold, the pressure switch (by way of a small lever on the lower, right side of the Square D unit) until a minimum pressure is achieved. This is typically only a few seconds.
I always turn the pressure pump breaker off when I leave, but never considered do so at night. It makes sense.