Introduction; Pressure Sensors Installation; Pipes Connection - Komfovent VAV Manuel D'installation

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INTRODUCTION

Variable Air Volume (hereafter called as „VAV") control mode is when air handling unit operates depending

on changeable ventilation demands in separate premises. By those demands controlled ventilation system

ensures ventilation only where is needed, therefore such air volume control mode signally reduces unit's ex-

ploitation costs, prolongs unit's life time, filters are less polluted.

After unit have been installed and commissioned it must be appropriately prepared according to hereunder

description clauses to ensure correct VAV mode operation.

For VAV function operation two duct pressure sensors are needed (they are supplied together with the air han-

dling unit if VAV function is ordered) to be additionally installed with the unit: one on air supply duct, another on

exhaust. Pressure sensors installation requirements:

•

sensors must be installed on the straight duct part with recommended minimum distance of two diagonals

for rectangular duct cross-section or two diameters of the circular duct correspondingly;

•

it is recommended to install sensor vertically with air pipes directed downwards;

•

sensor is screwed directly to the duct (refer to figure 1).

After pressure sensors have been installed in the specified place, air pipes by which air pressure is supplied to

the sensors must be connected. To each sensor one air pipe must be connected in such a way: one pipe end

directly to the sensor (see figure 2.), another pipe end is passed through the gasket of drilled hole in the duct

and inserted inside the duct.

To the sensor which is installed on supply air duct, pipe is connected to the place marked by "+" sign, anoth-

er connection marked by "-"sign remains opened. To the sensor intended for the exhaust air, pipe is connected

conversely, i.e. to "-"sign, and sensor connection marked by "+" is left opened.

It is recommended to keep the length of pipes connecting sensors with ducts as short

as possible.

Fig. 1. Pressure sensor dimensions

Fig. 2. Pressure sensor pipes connection

UAB KOMFOVENT we reserve the right to make changes without prior notice

VAV-18-11

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