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6B) Critical Point Checks
To insure proper and reliable operation of the system, it is the responsibility of the system designer or
installer to properly verify all important milestones of the project
.
This includes all other contractual aspects for the system performed outside of the control system scope of
work:
-
Design phase: load calculations and ductwork layout and sizing, equipment selection, etc…..
-
Construction phase: RTU installation, ductwork installation, electrical work required, etc…
-
Commissioning and delivery phase: Operational system checklist, balancing, proper RTU
commissioning, etc….
In order to successfully deliver a fully functional system that will keep customer happy, proper initial design
and proper commissioning are mandatory.
6C) Balancing and Capacity
It is not the mandate of a zoning control system to correct
for an incorrect mechanical layout or improper
load calculations of the mechanical zoning equipment. The control system will deliver the loads required by
the master demanding zones by appropriately distributing the total available capacity of the installed
equipment to the required demanding zones.
It should also be noted that even when the equipment is undersized, the control system will distribute the
available capacity according to the priorities requested making most of the areas comfortable.
However, proper air balancing of the main trunks and zones must be done for optimal system operation.
This includes the following:
-
Min, Max and HeatMaxflow properly adjusted during balancing.
-
Adjustments may need to be done to the main trunk side-take-off directional adjustment blade of
the local VAV trunk is equipped with one.
