Oasis Concepts Diesel and AC Heating System for Recreational Vehicles and Yachts - Manual (Page 42)

Section 6, Wiring the Electrical System
6.7 What NOT to Do
Never shut off the Oasis™ Heating Module power via an inline
battery or master switch while the system is running. Never
disconnect the battery when the Oasis™ Heating Module is running,
and never disconnect the battery while the inverter is charging. Do
not wire the Oasis™ Heating Module through a disconnect that is
used as a normal shut-down of the DC system.
NOTICE
Doing either will severely damage the Oasis™ Heating Module
because it fails to automatically purge the combustion chamber.
Such damage is detectable upon inspection and will not be covered
under warranty. Always shut the system off using the normal
system controls, after it has completed its purge and cooled down
the combustion chamber.
6-4 The Oasis™ Heating Module