This guideline covers the format@ content@ delivery@ and updating of building HVACR systems OM documentation that is normally provided by the design and construction team members. PURPOSE To guide those responsible for the design@ construction@ and commissioning of building HVACR systems in the preparation and delivery of operating and maintenance (OM) documentation that a. is simple to prepare and update@ b. is delivered on time@ c. is easy to use@ and d. provides accurate and relevant information.