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VTS reserves the right to implement changes without prior notice
Ventus Air Handling Units
Necessary cleaning should be carried out using:
- vacuum cleaning with soft suction nozzle,
- blowing through the ducts with air stream in a direction opposite to the normal air flow direction,
- washing the air ducts at their whole length with water with cleaning agents which do not cause
aluminum corrosion,
- in case of very contaminated exchangers you can use stream of compressed water to clean them.
While cleaning the exchanger using mechanical cleaning agents pay utmost attention not to damage
or deform the exchanger's panels.
During exchanger operation in below zero temperature, the exchanger must be thoroughly dried
before next start-up.
And what is more, please check:
- damper's operation,
- condenser's condition,
- draining tray's condition,
- passability of the condensate drainage system,
- before starting the AHU, fill the water siphon with water, assembly of anti-frost system (if any),
In the units VS 21-55 counter-flow exchanger is installed as a one piece, similar as cross-flow
recuperator, and access to it is directly after opening the inspection door. In the units VS 75-650
hexagonal exchanger is inbuilt vertically and consist on one, two or more pieces assembled in
separate construction. Each of that construction is possible to move out of the AHU.
Steps to remove the exchanger from the AHU
1) Unscrew the screws fixing horizontal columns (pos.1. fig.23) and remove them
2) Unscrew the screws fixing vertical columns at the top and bottom (pos.2. fig.23) and remove them
from the unit
3) Unscrew the bolts fixing the exchanger cage. Bolts are placed at the top and bottom (pos.3. fig.23)
and the middle (pos. 4. fig.23) part of the AHU. In the units VS 75-230 is additional fixing to the
celling (pos.5. fig.23).
4) Remove exchanger cage from AHU (pos.6. fig.23).
Number of columns, screws and bolts necessary to disassembly depend on the size of unit.
