To design a Standard Operating Procedure that describes the procedure for operation and maintenance of air shower.
2.0 SCOPE
This Standard Operating Procedure (SOP) is applicable for the operation, and maintenance of air showers for the Microbiology Laboratory and Animal House Facility (AHF).
3.0 RESPONSIBILITY
3.1 All personnel in the Animal House Facility shall be responsible for the implementation and compliance with the SOP.
3.2 Head/Designees/Scientists/Study Directors entering into Microbiology Laboratory and AHF shall be responsible to ensure the implementation and compliance with the SOP.
4.0 DISTRIBUTION
4.1 The Quality Assurance department is responsible for keeping SOP ‘Master Copy’ approved by the Quality Assurance Head.
4.2 The copy of ‘Control Copy’ of SOP is being distributed in the AHF department and placed near related Equipment/Instruments as Display Copy.
5.0 DEFINITION(S)
5.1 Definition(s)
5.1.1 Air showers quickly and effectively remove particulate that would otherwise be carried into the cleanroom; high air-flow volume combined with high nozzle velocity provides the power and force necessary for optimal operation.
6.0 ABBREVIATION(S)
6.1 Abbreviations:
6.1.1 SOP: Standard Operating Procedure
6.1.2 AHF: Animal House Facility
6.1.4 PPEs: Personal Protective Equipment
6.1.5 HEPA: High-Efficiency Particulate Air
7.0 PROCEDURE
7.1 Introduction
Air showers are specialized enclosed antechambers that are incorporated as entryways of cleanrooms and other controlled environments to reduce particle contamination. Air showers utilize high-pressure, HEPA- or ULPA-filtered air to remove dust, fibrous lint, and other contaminants from personnel or object surfaces.
Figure 1: Air Shower
7.2 Instrument description
7.2.1 Exterior: 16-gauge CR steel, powder-coated white
7.2.2 Nozzles: ABS plastic
7.2.3 Door: anodized aluminum narrow style frame with static-dissipative PVC panel
7.2.4 System Power: 460VAC, depending on system requirements 50/60Hz 3-phase with neutral 4-wire.
7.2.5 Air Speed: up to 8,000 FPM (nominal) measured where air exits the nozzle
7.2.6 HEPA Filters: pleat depth: 27.5 mm efficiency: 99.99% maximum relative humidity: 99% dimensions to outer flange: 24” x 24” x 11.5”
7.2.7 Filter Media: polyurethane mini-pleats with thermal plastic separators and aluminum frame.
7.2.8 Blower Motor: See appended document for information pertaining to your system.
7.3 Operations
7.3.1 Check both oversized mushroom-head Emergency Stop push buttons to make sure they are not activated.
7.3.2 Prior to initial personnel use, run the shower cycle several times to purge the system and remove all construction debris.
7.3.3 Open the entrance door to enter the Air Shower/Tunnel and close the door to commence the shower cycle. Both entrance and exit doors will be locked for the duration of the shower cycle.
7.3.4 Once the shower cycle completes, both entrance and exit doors unlock and the user will be allowed an Exit Door Delay Time to exit the unit before the next cycle can begin and door interlocks can be engaged.
7.3.5 The next shower cycle will commence once the next personnel enters the unit and both Exit Door and Entrance Door Delay Times pass.
7.3.6 In case of an emergency, push either Emergency Stop Button to immediately stop the shower cycle and unlock all doors.
7.3.7 Air Nozzles
7.3.7.1 To adjust the direction of airflow on each air nozzle, unscrew by hand the locking mechanism to loosen the nozzle.
7.3.7.2 Re-direct the air nozzle to preference.
7.3.7.3 Tighten the air nozzle to secure it in place.
7.3.8 Air filtration
7.3.8.1 An air shower’s recirculating air filtration systems typically use two sets of filters. The first is a pre-filter for catching the bulk of contaminants. The second is a high-capacity, 99.97%-efficient HEPA filter.
7.3.8.2 System blower units are usually mounted on the ceiling. If your facility has height restrictions, make sure the blowers can be mounted on the external wall.
7.3.8.3 For easy routine maintenance, pre-filters should be changed regularly. Replacement filters are economical and easy to change.
7.3.9 Doors
7.3.9.1 Access to the cleanroom must be controlled. Select a design with the appropriate air shower and cleanroom door interlocks.
7.3.9.2 Like airlocks, air showers have entrance and exit doors that cannot be opened at the same time. Workers enter one side and exit on the opposite side. When one door opens, the other door’s magnet energizes, preventing it from opening. During the cleaning cycle, both doors are energized (locked) to prevent anyone from entering or leaving before the cycle is completed.
7.4 Maintenance
7.4.1 Cleaning
7.4.1.1 Periodically wipe down the interior and exterior panels of the Air Shower/Tunnel with a clean, non-linting wiper (Terra Universal recommends using a polyester material), clean water, and a mild detergent. Use uni-directional (not circular) swipes to remove all surface contaminants.
7.4.2 Blower Module
7.4.2.1 The blower module consists of a direct-drive blower that is selected for continuous operation. Blower bearings are sealed and maintenance is not required. All other bearings are permanently lubricated. The Blower Module(s) on the Air Shower/Tunnel can be accessed by removing the roof panel at the top of the unit. Terra Universal recommends inspecting the blower module every 3-6 months for potential dust accumulation. For more information, refer to the appended Dayton Motor Installation and Maintenance Information at the end of this Quick-Start Operating Guide.
7.4.3 HEPA Filter Replacement
7.4.3.1 From outside the Air Shower/Tunnel, unscrew the fasteners of the outside access panel door with a flathead screwdriver and remove the door. This provides access to the inside panel door to the HEPA filter.
7.4.3.2 Unscrew the fasteners on the inside panel door with a Phillips head screwdriver and remove the door.
7.4.3.3 The HEPA filter is held down by a polycarbonate shim screwed into place. Unscrew these fasteners and remove the shim.
7.4.3.4 While handling only by the edges, slide out and discard the HEPA filter.
7.4.3.5 Slide in the new replacement HEPA filter.
7.4.4 LED Lighting
7.4.4.1 Replace LED lights when you observe flickering or burnout. Contact Terra Universal and any sales associate can help you order replacement LED lighting for your Air Shower/Tunnel.
8.0 PRECAUTIONS
8.1 All PPEs like an apron, gloves, mask, head caps, and shoe cover should be worn before using the instrument.
8.2 Press Keys softly.
8.3 Clean the equipment with a dry piece of robe or a lightly moistened one, do not use organic solutions.
8.4 Never use abrasive products or dissolvents.
8.5 Never pour water or liquids on the equipment.
9.0 REFERENCES
9.1 References
9.1.1 Refer to the manufacturer’s manual for additional information.
7.2 Instrument description
7.2.1 Exterior: 16-gauge CR steel, powder-coated white
7.2.2 Nozzles: ABS plastic
7.2.3 Door: anodized aluminum narrow style frame with static-dissipative PVC panel
7.2.4 System Power: 460VAC, depending on system requirements 50/60Hz 3-phase with neutral 4-wire.
7.2.5 Air Speed: up to 8,000 FPM (nominal) measured where air exits the nozzle
7.2.6 HEPA Filters: pleat depth: 27.5 mm efficiency: 99.99% maximum relative humidity: 99% dimensions to outer flange: 24” x 24” x 11.5”
7.2.7 Filter Media: polyurethane mini-pleats with thermal plastic separators and aluminum frame.
7.2.8 Blower Motor: See appended document for information pertaining to your system.
7.3 Operations
7.3.1 Check both oversized mushroom-head Emergency Stop push buttons to make sure they are not activated.
7.3.2 Prior to initial personnel use, run the shower cycle several times to purge the system and remove all construction debris.
7.3.3 Open the entrance door to enter the Air Shower/Tunnel and close the door to commence the shower cycle. Both entrance and exit doors will be locked for the duration of the shower cycle.
7.3.4 Once the shower cycle completes, both entrance and exit doors unlock and the user will be allowed an Exit Door Delay Time to exit the unit before the next cycle can begin and door interlocks can be engaged.
7.3.5 The next shower cycle will commence once the next personnel enters the unit and both Exit Door and Entrance Door Delay Times pass.
7.3.6 In case of an emergency, push either Emergency Stop Button to immediately stop the shower cycle and unlock all doors.
7.3.7 Air Nozzles
7.3.7.1 To adjust the direction of airflow on each air nozzle, unscrew by hand the locking mechanism to loosen the nozzle.
7.3.7.2 Re-direct the air nozzle to preference.
7.3.7.3 Tighten the air nozzle to secure it in place.
7.3.8 Air filtration
7.3.8.1 An air shower’s recirculating air filtration systems typically use two sets of filters. The first is a pre-filter for catching the bulk of contaminants. The second is a high-capacity, 99.97%-efficient HEPA filter.
7.3.8.2 System blower units are usually mounted on the ceiling. If your facility has height restrictions, make sure the blowers can be mounted on the external wall.
7.3.8.3 For easy routine maintenance, pre-filters should be changed regularly. Replacement filters are economical and easy to change.
7.3.9 Doors
7.3.9.1 Access to the cleanroom must be controlled. Select a design with the appropriate air shower and cleanroom door interlocks.
7.3.9.2 Like airlocks, air showers have entrance and exit doors that cannot be opened at the same time. Workers enter one side and exit on the opposite side. When one door opens, the other door’s magnet energizes, preventing it from opening. During the cleaning cycle, both doors are energized (locked) to prevent anyone from entering or leaving before the cycle is completed.
7.4 Maintenance
7.4.1 Cleaning
7.4.1.1 Periodically wipe down the interior and exterior panels of the Air Shower/Tunnel with a clean, non-linting wiper (Terra Universal recommends using a polyester material), clean water, and a mild detergent. Use uni-directional (not circular) swipes to remove all surface contaminants.
7.4.2 Blower Module
7.4.2.1 The blower module consists of a direct-drive blower that is selected for continuous operation. Blower bearings are sealed and maintenance is not required. All other bearings are permanently lubricated. The Blower Module(s) on the Air Shower/Tunnel can be accessed by removing the roof panel at the top of the unit. Terra Universal recommends inspecting the blower module every 3-6 months for potential dust accumulation. For more information, refer to the appended Dayton Motor Installation and Maintenance Information at the end of this Quick-Start Operating Guide.
7.4.3 HEPA Filter Replacement
7.4.3.1 From outside the Air Shower/Tunnel, unscrew the fasteners of the outside access panel door with a flathead screwdriver and remove the door. This provides access to the inside panel door to the HEPA filter.
7.4.3.2 Unscrew the fasteners on the inside panel door with a Phillips head screwdriver and remove the door.
7.4.3.3 The HEPA filter is held down by a polycarbonate shim screwed into place. Unscrew these fasteners and remove the shim.
7.4.3.4 While handling only by the edges, slide out and discard the HEPA filter.
7.4.3.5 Slide in the new replacement HEPA filter.
7.4.4 LED Lighting
7.4.4.1 Replace LED lights when you observe flickering or burnout. Contact Terra Universal and any sales associate can help you order replacement LED lighting for your Air Shower/Tunnel.
8.0 PRECAUTIONS
8.1 All PPEs like an apron, gloves, mask, head caps, and shoe cover should be worn before using the instrument.
8.2 Press Keys softly.
8.3 Clean the equipment with a dry piece of robe or a lightly moistened one, do not use organic solutions.
8.4 Never use abrasive products or dissolvents.
8.5 Never pour water or liquids on the equipment.
9.0 REFERENCES
9.1 References
9.1.1 Refer to the manufacturer’s manual for additional information.
END
OF THE DOCUMENT
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