Yes, the 920 RC switch can be installed upside down since it will not affect the mechanical movement of the contacts because the CENTER of GRAVIITY is in the middle of the ASCO 920. Please see below.
For further information, you may click on this 920 link or contact Technical Support at 1-800-800-2726 then dial 3 or send an email to technicalsupport@ascopower.com.
Published for:ASCO Power Technologies USA