Start-up
VAV Zone II Controllers
CARRIER CORPORATION ©2019
Installation and Start-up Guide
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47
Balancing the system
Most VAV system airflow designs are based on cooling requirements which require a greater cfm (liters/second)
flow than heating requirements. Using the following balancing procedure, you adjust the cooling airflow first. If the
heating and cooling maximum airflow requirements are the same, you do not need to balance the heating airflow.
Use the Test & Balance program to balance the system. Test & Balance can perform all the necessary functions,
including shutting down the Linked air source and performing global commands to all zones in the system. You
should do steps 1 through 4 in
Prepare for balancing
(page 47) prior to using Test & Balance. See Test &
Balance's Help for details on the steps required to complete the balancing procedure.
NOTE
We recommend that you set the heating minimum airflow settings for all the zones in the system to
maintain the air source’s design minimum heat cfm (liters/second) airflow across its heat exchanger to prevent
damage to the equipment.
Prepare for balancing
1
Log in to the i-Vu® application with an Installer or Administrator role, or use Field Assistant.
2
Make sure the air source and its controller have been properly started and can run as a standalone unit.
3
Make sure you have addressed, commissioned, and started the zone and bypass controllers, if present.
4
Verify that zone controllers supplying multiple registers have manual dampers on each register branch duct
for balancing the design airflow through each register.
Summary of Contents for VAV Zone II
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