Technical specifications for CSIR designed sputum booth

Materials and workmanship

All apparatus, components parts, fittings and materials supplied and/or installed whether especially specified herein or not shall conform in respect of quality, manufacture, tests and performance with the requirements of the appropriate current South African (SABS) or British Standard Specifications (BS).

All materials and workmanship which may, in the opinion of the CSIR, be inferior to that specified for the work shall be condemned. All condemned material and workmanship must be replaced or rectified as the case may be, to the satisfaction of the CSIR.

Performance specifications

Supply Air flow rate

Supply air flow rate shall be at least 2100 m³/h measured as specified herein

Air exchange rate

The sputum collection booth ventilation rate shall be at least 800 Air Changes per Hour (ACH).

Booth internal air pressure requirements

The booth shall maintain a negative air pressure with respect to adjacent spaces during operation. No outward airflow is permitted during closed door operation.

Aerosol filtration requirements

The HEPA filter shall achieve a filtration efficiency of not less than 99.95% when tested as per section 6.4.1 – 6.4.3.

Noise levels

Acoustical noise levels shall be compliant with §Error! Reference source not found. when tested in accordance with ISO 3743-1 and ISO 3743-2

Design specifications

Booth dimensions

Booth inner dimensions (mm) shall be 1600Lx734Wx1900H.

Booth outer dimensions (mm) shall be 2000Lx740Wx2000H.

Configuration of aerosol filtration system and fan

Aerosol filtration system (pre and HEPA filters) and fan shall be configured as shown in the schematic diagram of Figure 2.

Internal booth surfaces

The internal surfaces of the booth shall be impervious (no gaps or voids), able to withstand regular and vigorous cleaning, washable and easily disinfected.

Filtration housing

Filtration housing for the Pre and HEPA filter shall be N G™ filter duct housings.

Plenum

The plenum shall be detachable from the booth See Figure 3.

4 lockable or retractable wheels shall be provided to the plenum for mobility.

Inlet air filtration

A G4 air filter matt shall be situated over the fresh-air intake screen.

Location of supply air grill

The perforated supply air grille shall be located on the ceiling of the booth and shall have an open area of not less than 50% and a hole shape aspect ratio of 1:1.

The grille shall be configured to ensure an even supply airflow distribution throughout the sputum collection booth.

The thickness of the grille shall be at least 0.8 mm.

High Efficiency Particulate Air (HEPA) filter

An EN 1822 H13 Grade HEPA filter shall be installed as per arrangement shown in the schematic diagram Figure 2.

Fan

Fan shall be an automatic step less variable speed fan.

Pre Filter

An F9 filter shall be installed as per arrangement shown in the schematic diagram Figure 2.

Booth lighting

LED lighting strips shall be installed along the inside gloss white walls above head height.

Sputum cup holder

The sputum cup holder shall be installed along the inside wall of the booth below the window as shown in Figure 3.

The material of the cup holder shall be Perspex or Stainless steel.

Seat

The seat shall be foldable and able to withstand a dynamic load of 150 kg.

Window

A window shall be installed as per schematic diagram of Figure 2.

Pressure gauges

Pressure gauges with a maximum range of 500 Pa shall be installed across the HEPA filter and the pre filter.

Automatic door lock system

Automatic door lock system shall be installed.

The control logic for the door shall be as per Figure 1.

Electrical Supply and Safety

The booth power shall be supplied by standard IEC Type M 230V 50Hz single phase power outlet

The fan and fan controller shall comply with the safety requirements of SANS 60335-2-80:2016 “Particular requirements for fans”.

The requirements of SANS 60335-2-65:2015 “Particular requirements for air-cleaning appliances” shall apply

The requirements of SANS 60335-1:2018 “Household and similar electrical appliances – Safety” shall apply

DRAWINGS

Figures 2&3 are presented for general arrangement purposes.

The contractor shall prepare shop drawings which shall show in detail the construction of all the parts, method of assembly where applicable, materials and connections, sealants, fastenings and all other necessary details.

Installation

Indoor location of booth

The sputum booth shall not be located close to open windows and doors.

The sputum booth shall not align with commonly viewed items such as notice boards, monitors, televisions etc.

The CEOs or infection control managers of the facilities of sections 5.1.3 shall allocate the exact installation location within the facility.

The contractor shall allow in his tender price for the transportation costs of booths to installation sites.

Commissioning

Testing responsibility

The contractor shall allow in his tender price for the services of appropriately certified commissioning technicians or engineers.

Airflow direction tests

Airflow direction tests to confirm negative booth pressure shall be conducted as per ISO 14644:3 section B8.

Booth ventilation rate

Booth ventilation rate shall be tested as per ISO 14644:3 for non-unidirectional airflow system. The test shall be conducted at the exhaust air terminal.

HEPA Filter integral efficiency test

HEPA Filter integral efficiency test shall be as per ISO 14644:3.

Challenge aerosol particle size shall be as per ISO 14644:3 section B.6.2.2

Challenge aerosol concentration in the booth shall be as per ISO 14644:3 section B.6.2.3.

MAINTENANCE AND PERFORMANCE MONITORING

The contractor shall maintain good working order of the sputum collection booth for 2 years after installation.

Fully comprehensive two year maintenance and monitoring plan including all costs shall be provided by the contractor.

The maintenance plan shall include maintenance activities and performance monitoring.

GUARANTEE PERIODS

The contractor shall guarantee that spare parts will be available for the expected lifetime of the sputum collection booth and for a period of at least ten years from procurement date.

The guarantee must cover all items against manufacturing defects, installation, commissioning, materials and workmanship. Should manufacturing defects be detected within a 30-day period, the supplier shall replace the equipment with a new one.

Contractors are obliged to refund, repair or replace the failed, unsafe and defective goods.

Documentation

The following reports and records shall be provided upon handover:

1)    Manual including:

a)     Operating instructions

b)    Maintenance schedule and instructions

c)     Shop drawings

d)    All tests reports

e)    Material data sheets

f)      Equipment data sheets

g)     Decommissioning and disposal plan

TRAINING

Training of onsite maintenance personnel and sister in charge by the contractor in the operation, dismantling and cleaning of the sputum collection booth shall be included in the offer.