Halton Vita VSR – Supply air unit with blue light disinfection

Overview

Halton Vita VSR is a HEPA supply air unit for the Halton Vita OR Space 5 and Space 7 solutions, available with or without blue light disinfection. Integrated blue light technology provides a chemical-free disinfection method for surfaces to ensure a safer operating environment. Disinfection units also include white light LEDs for general lighting.

Applications

• Operating rooms in hospitals
• Other spaces with high cleanliness requirements

Key features

• Air supply through adjustable nozzles.
• Installed flush to the ceiling.
• Modular structure with several size configurations.
• Two heights available. The higher model reduces the space required for the ductwork.
• Antibacterial epoxy-polyester powder paint finishing to prevent microbial growth.
• Blue light disinfection system for improved room hygiene (optional).
  • Optimised surface irradiation and disinfection performance due to integrated blue light LEDs.
  • High-quality white light LEDs for general room lighting.
  • Integrated units allow more space in the false ceiling for other installations.
  • Faster installation time due to pre-manufactured units.
• Depending on the used lighting control system, there are two alternative product models available (DALI and On/Off). The product model selection has to be done at latest when ordering the product.
• Used with low-pressure-drop Halton H14 HEPA filters with a gel gasket.
• Test probes for measuring the filter pressure loss and the particle concentration before the filter. Differential pressure transmitter (optional).

Operating principle

Airflow

Air is filtered inside the modules by HEPA filters and supplied into the room through the air nozzles located in the front panel of the unit.

The circumferential supply airflow from the supply air unit is directed partly towards the operating area and partly towards the room periphery. The inward supply airflow displaces the contamination generated in the operating area and prevents the intrusion of the outward supply airflow into the centre.

Fig.1. Halton Vita VSR for Space 5

Fig.2. Halton Vita VSR for Space 7

Blue light disinfection system

Disinfection units can be integrated into the product. Each unit has both blue light and white light LED elements. The blue light LEDS are used for surface disinfection and the white light LEDs for general lighting.

The ability of blue light to destroy microbes is based on its ability to energise naturally light-sensitive compounds found in all bacteria, yeast, and mold cells. When these compounds are exposed to high-intensity blue light, a natural chemical reaction starts where free oxygen radicals are formed inside cells. These free radicals are highly reactive molecules that start destroying the cells from within by damaging their internal structures. When continued long enough, the reaction destroys the microbes.

The integrated design of disinfection units provides optimised disinfection over the whole operating room with a special emphasis to the critical operating area. Together with the normal, daily cleaning of operating rooms, blue light disinfection makes it easier to keep the operating room surfaces clean and safe.

Benefits:

• Safer operating environment
  • Blue light destroys microbes on surfaces.
  • Reduced number of microbes in the space.
  • Blue light does not develop antimicrobial resistance.
• Disinfection light integrated into the product
  • More space in the false ceiling for other installations.
  • Faster installation time due to pre-manufactured units.
• Fully automatic system
  • The blue light disinfection system can be configured so that it is automatically switched on when the room is not occupied.
  • Ensures disinfection and saves time for the staff.

Laboratory tests on the effectiveness of the blue light disinfection system have been carried out in an accredited laboratory. The results show that the blue light photon disinfection produces relevant bacteria reductions. When combined with photocatalytic coating, relevant reductions are achieved already before 30 minutes.

Fig. 3. Bacteria reductions with the blue light disinfection system (LED Taylor Oy)

High quality general room lighting

Blue light disinfection units also include integrated white light LED elements, which enables high-quality general room lighting. This also leads to additional savings in lighting installation and leaves ceiling space free for other installations.

Key technical data

Features and options

The Halton Vita VSR supply air unit is available in three product models and in several size configurations, each with or without disinfection units.

Space 5

A supply air unit for Halton Vita OR Space 5 ultraclean operating rooms (< 10 CFU/m3). The supply- air unit consists of 4-8 modules forming a square or rectangular ring.

• VSR/A: with disinfection units (16-24 units depending on the size of the supply air unit)
• VSR/D: without disinfection units, with option to add disinfection units later

Fig. 5. Halton Vita VSR/A (Space 5)

Space 7

A supply air unit for Halton Vita OR Space 7 clean operating rooms (< 100 CFU/m³). The supply air unit consists of 2 parallel modules.

• VSR/B: with disinfection units (8 or 12 units depending on the size of the supply air unit)
• VSR/E: without disinfection units, with option to add disinfection units later

Fig. 6. Halton Vita VSR/B

Single module

• VSR/C: with disinfection units (2-4 units depending on the size of the supply air unit)
• VSR/F: without disinfection units, with option to add disinfection units later

Fig. 7. Halton Vita VSR/C

Fig. 8. Halton HDP-PE differential pressure transmitter

• For information on the pressure transmitter, see Accessories.
• For information on the order code, see Order code.
• For information on filters, see Filters.
  Note: Filters need to be ordered separately.

Structure and materials

Fig. 9. Structure of Halton Vita VSR with disinfections units

Fig. 10. Structure of Halton Vita VSR without disinfections units

Dimensions and weight

Halton Vita VSR/A or VSR/D (Halton Vita OR Space 5)

Halton Vita VSR/A or VSR/D for Halton Vita OR Space 5 consists of 4-8 modules forming a square or rectangular ring.

Fig.11. Halton Vita VSR/A or VSR/D, 3000×3000 mm (H=455 mm)

Fig.12. Halton Vita VSR/A or VSR/D, 3600×3000 mm (H=455 mm)

Fig. 13. Halton Vita VSR/A or VSR/D, 3600×3000 mm (H=605 mm)

Fig. 14. Halton Vita VSR/A or VSR/D, 3600×3600 mm (H=455 mm)

Fig. 15. Halton Vita VSR/A or VSR/D, 3600×3600 mm (H=605 mm)

Fig. 16. Halton Vita VSR/A or VSR/D, 4200×3600 mm (H=455 mm)

Fig. 17. Halton Vita VSR/A or VSR/D, 4200×3600 mm (H=605 mm)

Fig. 18. Halton Vita VSR/A or VSR/D, 4200×4200 mm (H=455 mm)

Halton Vita VSR/B or VSR/E (Halton Vita OR Space 7)

Halton Vita VSR/B or VSR/E for Halton Vita OR Space 7 consists of 2 parallel units. The parallel units consist of 1 or 2 modules. The distance (S=1200…2400) between the parallel units is specified separately for each project.

Fig. 19. Halton Vita VSR/B or VSR/E, 2400×600 mm

Fig. 20. Halton Vita VSR/B or VSR/E, 3600×600 mm

Halton Vita VSR/C or VSR/F

The Halton Vita VSR supply air module is available as a spare part (VSR/C or VSR/F) for Halton Vita OR Space supply air units.

Fig. 21. Halton Vita VSR/C or VSR/F, 1250×600 mm

Fig. 22. Halton Vita VSR/C or VSR/F, 1800×600 mm

Fig. 22. Halton Vita VSR/C or VSR/F, 2400×600 mm

Specification

• A supply air unit with HEPA filters for operating rooms.
• Installed flush to the ceiling.

Structure

• Air supply through adjustable nozzles.
• The lockable nozzles ensure that the setting of the nozzles remains unchanged during cleaning.
• A smooth internal surface that enables easy cleaning.
• Easy filter change through the front panel.
• Test probe for measuring particle concentration before the filter.
• Test probe for measuring the filter pressure loss.
• Differential pressure transmitter to indicate the filter pressure loss.
• Disinfection unit with blue light and white light LED elements. Blue light is for disinfection and white light is for
  general lighting.
• Used with HEPA filters that each have an aluminium frame and a gel gasket according to EN 1822, including
  an individual test certificate.

Material

• Casing manufactured from aluminium. Front panel manufactured from galvannealed steel.
• Antibacterial epoxy-polyester powder paint finishing to prevent microbial growth.
• Nozzles manufactured from plastic (polyacetal).

Packaging and identification

• The visible surface of the product is protected by a removable plastic coating.
• The duct connection remains sealed during transport.
• The product is packed on a pallet.
• The product is identified by a serial number printed on labels attached both to the product and the package.

Installation

The supply air units are installed to the operating room ceiling before the installation of the false ceiling. The units are hung from the ceiling with M8 drop rods using fixing brackets. The units are bolted together with M6 bolts.
Note: When installing the unit, be careful not to drill any holes into the casing. If the casing is damaged, unfiltered air may leak.

The internal cabling of disinfection units is done at the factory. The external cabling is connected to the junction box at the site.

The unit should be cleaned on the inside before filter installation.

Filter integrity testing should be performed after filter installation.

Commisioning

Airflow rate
The airflow rate for each duct connection of the Halton Vita OR Space solutions is balanced so that an equal amount of air is supplied via each connection. As a result, the airflow is distributed evenly throughout the supply air modules and no additional airflow adjustment is needed.

Airflow pattern
The nozzles are preset at the factory. If needed, the nozzles can be manually adjusted on site to create the desired airflow pattern. The nozzles can be adjusted in 15-degree intervals.

The airflow pattern should be fine-tuned during commissioning.

Maintenance

The required maintenance tasks include changing the filter and cleaning the supply air unit.

Filter

To ensure that the air quality meets the requirements, the HEPA filter must be checked frequently and, if needed, the filter must be replaced. The maintenance frequency of a filter depends on the air cleanliness of the supply air and room air.

The filter must be immediately replaced in the following cases:

• The final differential pressure has been reached.
• The filter is damaged.
• There are micro-organisms, fungal spores, or odours present in the filter.

Supply air unit

The unit can be cleaned using disinfectants. The front panel can be removed and cleaned in a washing machine (water temperature < 95°C). The lockable nozzles ensure that the setting of the nozzles remains unchanged during cleaning.

Be careful not to wet the filters. Dampening the filter media will permanently decrease the filter efficiency.

For cleaning frequency, follow the maintenance schedule of the building.

Filter

Fig.31. HEPA filter

Description

High efficiency particulate air (HEPA) filters are widely applied in cleanrooms where high air quality standards are essential.
Note: Filters need to be ordered separately.

Performance data of HEPA filters

Filter compatible with Halton Vita VSR is available in class H14 (European Standard EN 1822-1:2009) with a gel gasket.

Operating range:

• Temperature max. 70°C
• Humidity max. 90%
• Final pressure drop max. 500 Pa

Table 1. Number of filters

Accessories

Halton HDP-PE

The Halton HDP-PE differential pressure sensor is a pressure-measuring device, used to measure differential pressures in the duct.

Description

• The pressure sensor gives an accurate measurement of the airflow.
• The IP54 casing ensures that the unit can be used also in dusty and humid environments.
• The proper range of measurement can be selected at commissioning. The outputs are directly proportional to
  the pressure differences between the + and – inlets.
• The connections to the detected process are made by using plastic tubing (⌀ 6/4 mm).
• The software compensates the zero-point drift for the transmitter by making automatic calibrations every 5
  minutes, so that manual recalibration is not normally required.
• The influence of process disturbances can be filtered by increasing the time constant.
• The sensor can be used for measurement in polluted air.
• The PEL can be integrated in a fast system due to its standard time constant of 0.5 s.

Technical data

Table 2. Technical data for Halton HDP-PE differential pressure sensor

Table 3. Measuring ranges for Halton HDP-PE differential pressure sensor

Note: The proper measuring ranges chosen at commissioning: ± ranges (s4 = open) 5 V / 12 mA = 0 Pa.

Installation (ranges, coding, wiring)

Order code

VSR/M-A-H, DF-FA-CO-PT-ZT

Order code example

VSR/A-36×36-605,DF=Y,FA=Y,CO=SA,PT=P1,ZT=N