Airzone iQ Zone, Installation Manual, Page: 35 / 46

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Fig. 11 Fig. 12
13.4 Bypass
13.4.1 Bypass Installation
The zoning system supplies treated air exclusively to the areas that need it according to the user’s
selection. Since some zones are closed, part of the supply air from the system must be diverted to avoid
overpressure in the supply duct. This function is performed by the bypass damper thus maintaining a
stable pressure in the duct system.
13.4.2 Types of Bypass Dampers
Airzone has two types of bypass dampers to be used depending on the installation. They
are free release bypass dampers and ducted bypass dampers.
The following requirements must be satisfied for any type of bypass damper whether free
release or ducted:
A) The bypass damper gate must not interfere with the airflow coming from the return.
B) There must be sufficient space in the installation site of the bypass damper to avoid any
interference to the operation of the bypass damper counterweight.
C) Easy access must be guaranteed to the damper counterweight in order to adjust the
operation of the bypass damper.