19
AHU size
Number of panel filters P.FLT G 4 for a
filtration section
Size
Amount
AxB
pcs
SVS-35
549x480
2
SVS-50
619x545
2
SVS-70
969x480
2
SVS-85
646x605
3
SVS-100
712x605
3
The personnel in charge of the AHU should maintain up-to-date records after the initial AHU start-up, following
the guidelines in of the "Inspections and maintenance table" - which is Included in the Warranty Card. Any
routine works related to the AHU operations should be recorded there. Carefully kept register is the only reliable
document stating the unit operation conditions, dates of current inspections, identified problems, etc. When
contacting VTS representatives always use the AHU factory identification number, located on the casing as well
as in the AHU documentation.
Duration of periods between particular actions have been determined with assumption that the AHU works
"non-stop" in low-dust environment and is not affected by any other factors worsening the operation conditions.
In environments with a high level of dust in supply or exhaust air, the inspections should be carried out more
frequently.
AHU spare parts and accessories can be ordered at local
authorized VTS service provider
. While ordering the
parts please use the type and factory identification number of the device. This information can be found on the
rating plate located on the fan section.
7.1. Dampers
If the damper is contaminated and does not operate smoothly, it should be cleaned in one of the following ways:
- with industrial vacuum cleaner with soft suction nozzle,
- blow it through with compressed air,
- wash it with water under pressure with cleaning agents which do not cause aluminum corrosion.
7.2. Filters
In standard AHU operation conditions the filters should be replaced circa twice a year. The necessity of
replacing the filter (beside the visual contamination) is also indicated by a pressure drop (150Pa).
The AHUs are equipped with the P.FLT preliminary panel filters, G4 class.
If the final pressure difference exceeds the designed value, the filters must be replaced. Panel filters are
disposable elements. When replacing the filters, also clean the filtration casing - by vacuum or dry
cleaning.
In case of ordering a new filter set at the VTS authorized service provider, provide filter type, filtration class,
AHU size and, if needed, size and number of filters according to the following table.
Table 6. Panel filters used in AHU SVS 35-100
The AHUs always have to operate with installed air filters, otherwise fans' power consumption may exceed
the recommended values, which may lead to the damage of the motor's wiring.
