MIL-HDBK-1003/3
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.
C-1.04
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.
C-1.05
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,
including simplicity in operation and maintenance, at the first
submittal opportunity. This will prevent the necessity of
changing the concept of the design.
C-1.06
Dry Climates. Many Naval facilities are located in
humid climates and so there is a tendency to tailor design
guidance for humid areas. There are also many Naval facilities
located in dry and cold climates. The practice associated with
design in these facilities can be considerably different. The
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