In general, you can always leave Perfect Moose switched on. The energy consumption of Perfect Moose is very low.
When Perfect Moose has been switched off, the start-up procedure always needs to be fully executed in order to guarantee correct functioning and good quality foam.
When you are planning not to use Perfect Moose Jack (with own boiler) for longer than 1 week, drain all the water from the boiler. When restarting your machine, just follow the start-up procedure. One of the steps is refilling the boiler with fresh water.