CHAMBERLAIN model CSO, COMMERCIAL STRENGTH OPENER residential opener is a 1/2hp chain drive. It is part of the value. This garage door opener has an ac motor on 110vac. A battery backup is not available. The remotes are rolling code on 390. The rail is style is Solid I.
The warranty on the garage door opener is 1 year on the motor and 1 year on the remaining opener parts from CHAMBERLAIN.
The model CSO, COMMERCIAL STRENGTH OPENER is discontinued.
CHAMBERLAIN model CSO, COMMERCIAL STRENGTH OPENER residential opener owners manual and instructions in PDF format at NO CHARGE!
VIEW / DOWNLOAD by clicking HERE
chamberlain_cso_om.pdf
(0.79 MB in English) This requires Acrobat 10 or higher