- IRC 1731 SAVE THESE INSTRUCTIONS NOTE: Check all parts for shipping damage. In case of damage, DO NOT use. Contact the Carrier/ Invacare for further instruction. Safety Summary WARNING DO NOT use this product or any available optional equipment without first completely reading and understanding these instructions, Stratos Portable Plus Compressor Operator’s Manual and any additional instructional material such as service manuals or instruction sheets supplied with this product or optional equ