I found a system in the attic of the business here. We are moving to a new building and I need to know if this unit is worth figuring out or not. At present we use an old Merlin 412 sys. The manuals link doesn't list anything for the 612 unit as far as I can tell.

Any help??
Model. 61200-00
Assy. 23500-1
File. E109461
IRS level V
TIA
JohnF