^A-DEC^         
[[https://www.a-dec.com/-/media/adecdotcom/resource-center/product-information/support-information/pre-installation-guides/86054500.pdf | 311 Chair Pre-Install]] 

[[https://www.a-dec.com/-/media/adecdotcom/resource-center/product-information/support-information/pre-installation-guides/86037500.pdf| 411 Chair Pre-install]]