tailieunhanh - HVAC and Dehumidifying Systems_11

Tham khảo tài liệu 'hvac and dehumidifying systems_11', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Simpo PDF Merge and Split UnregisteredVersion- http APPENDIX C Continued not be installed as designed 2 the system is installed to meet requirements of the design and submittals but quality of workmanship is such that the system will not function properly and 3 although construction might be satisfactory in all respects acceptance testing is of poor quality and latent defects in the systems go undetected. d Operation and maintenance deficiencies can occur from insufficient or improper training the system receiving inadequate operating and maintenance attention and the system receiving well meaning but misguided operation and maintenance attention. e A failure in any of these areas can be fatal to the successful operation of a VAV system. System Simplicity. The most common fault of the majority of designs is that the systems are too complicated to work reliably. Some systems never work initially others fail because Naval operation and maintenance personnel do not understand them sufficiently to keep them working as designed. The chief area of concern is control systems. A designer is always tempted to add features to improve performance and conserve energy but must weigh the potential benefits against the additional cost and complexity. Feedback On the average systems have too many features and are too complex for the needs of the Navy. The designer should design systems that err toward simplicity at the expense of features and require minimum maintenance. Early Coordination. Having experienced numerous problems on VAV systems the Navy wishes to have a high level of interaction between the designer and the Engineer in Charge and will often want to give the designer more direction than is normal. To minimize design changes it is important that there be good communication. This is particularly true in the early stages of the design. The designer shall communicate his design intent and the critical concepts of his proposed system .

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