Swegon PARASOL VAV Series Installation, Commissioning Maintenance

PARASOL VAV
Installation – Commissioning – Maintenance
Parasol VAV system design,
recommended arrangement of modules
Master and slave modules
The base modules are called slave modules and a base
module with control equipment is called a Master.
A Master can control a maximum of 7 slave modules.
The control equipment is supplied in factory-mounted
condition or can be ordered separately for upgrading a
slave module to Master.
The slave modules receive control voltage from the Master
for regulating air dampers and valve actuators.
Pressure measurements and calculations required for
regulating the airflow in the room take place in the
Master.
The Master presupposes that all the modules in the room
act in exactly the same way and have exactly the same
C-factor, commissioning pressure and accordingly also the
same airflow.
In order for the Parasol VAV system to operate in the best
way, the following is recommended:
• Constant pressurisation in the zone
• Symmetric arrangement of the modules (so that the
commissioning pressure will be as equal as possible in
every module)
• The modules in the room should all be the same size
• All the modules should have the same nozzle configu-
ration (C-factor)
Recommended arrangement
If the modules in the room have different commissioning
pressures, it is advisable to locate the Master where the
commissioning pressure is somewhere halfway between
the lowest and the highest commissioning pressure in the
room; see Example 1.
The Master registers and adjusts the airflow. When the
commissioning pressure differs substantially between the
modules, it is important to consider the location of the
Master in order to obtain an airflow in the room that is as
correct as possible.
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Master
Slave