Operation and Maintenance Manual (DTR) iSWAY
®
Set of products
Version 1.8 of 2.2021
161
12.2.3 Air velocity
12.2.3.1
In the third acceptance test the air velocity through the open door separating the high
pressure space from the low pressure space shall be measured, which shall meet the requirements
of Chapter 4 for the relevant system class. The test(s) shall be carried out as follows:
12.2.3.2
Measure the air speed using a calibrated manometer.
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2.3.3
The measurement of the speed of flow through the relevant door shall be taken with all
other doors open or closed in accordance with the relevant system class described in Chapter 4.
The doorway shall be unobstructed (see Figures 2, 3, 4, 5, 6 and 7 for the relevant doors).
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2.3.4
To determine more accurately the air velocity, take at least 8 measurements, evenly
distributed throughout the doorway. Calculate the arithmetic mean of these measurements or
alternatively move the corresponding measuring device evenly across the open door and record
the average air speed.
12.2.3.5
The calibration of all test equipment shall be such that the measurements are accurate
to ± 5%.
12.2.4 Door opening force
12.2.4.1
The fourth acceptance test shall consist of measuring the force required to open the door
in the case of a door between a high pressure and a non-pressurised space, as defined in Chapter
4.The opening force of an individual door shall be measured as follows:
12.2.4.2
Start the differential pressure system.
12.2.4.3
Attach the end of the force measuring device (e.g. spring weight) to the door handle, on
the door side corresponding to the direction of opening.
12.2.4.4
Release all locking mechanisms, hold open if necessary.
12.2.4.5
Pull the free end of the force measuring device, noting the highest force measured during
the opening of the door.
12.2.5 System start-up
