Belimo VRD2 - TROX
Belimo VRD2 - TROX
Belimo VRD2 - TROX
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Design and Areas of Application<br />
Single Duct with Supply Air/<br />
Extract Air Dependent Control<br />
Extract<br />
air<br />
TVA<br />
TVR<br />
TVJ<br />
Constant Differential Control<br />
Extract air volume flow<br />
Ratio Control<br />
Extract air volume flow<br />
250<br />
l/s<br />
200<br />
150<br />
100<br />
50<br />
Differential ± 0<br />
TVR + 50 m 3 /h<br />
TVJ - 50 m 3 /h<br />
Ratio ± 0<br />
Ratio + 10 %<br />
Ratio - 10 %<br />
TVZ<br />
TVS<br />
TVR<br />
TVJ<br />
0<br />
0 50 100 150 200 l/s 250<br />
250<br />
l/s<br />
200<br />
150<br />
100<br />
50<br />
t<br />
Supply air volume flow (actual value)<br />
0<br />
0 50 100 150 200 l/s 250<br />
Supply air volume flow (actual value)<br />
Supply<br />
air<br />
5<br />
Single Duct System<br />
The supply air volume flow controller receives a control<br />
signal from the room temperature controller and holds<br />
the supply air volume flow, at the specified set value. The<br />
controller adjusts the air quantity between the specified<br />
V · min and V · max values.<br />
Suply Air/Extract Air Slave Control<br />
In individual rooms and closed office areas, the balance<br />
between supply air and extract air must be maintained to<br />
avoid whistling noises through gaps around doors etc.,<br />
or making doors difficult to open and close. For this, the<br />
actual value of the supply air is monitored at the extract<br />
air volume flow controller. Thus the extract air volume<br />
flow in every operating situation follows the supply air.<br />
When designing the required volume flow differences,<br />
it must be ensured that the proposed controller can<br />
achieve the required constant differential or ratio control.<br />
When ordering VAV terminal units, the allocation by room<br />
numbers must be given. This allocation must be taken<br />
into account when the units are installed. VAV terminal<br />
units types TVA, TVR and TVJ are designed for use in<br />
normal air conditioning systems with extract air without<br />
high dust levels and without aggressive elements in the<br />
air. For extremely dusty extract air (grease, sticky dust),<br />
membrane pressure transducers must be provided and<br />
regular maintenance planned. For aggressive extract air,<br />
volume flow controllers of suitable materials are available.<br />
Order Example<br />
In accordance with sales leaflet and price list for ratio<br />
control:<br />
TVZ-R/160/B13/M2-30-250 l/s<br />
TVA -R/160/B13/S2-27-225 l/s
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