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BS ISO 5149-3:2014+A1:2021 Refrigerating systems and heat pumps. Safety and environmental requirements - Installation site, 2021
- National foreword
- Foreword
- 1 Scope
- 2 Normative references
- 3 Terms and definitions
- 4 Location of refrigerating equipment [Go to Page]
- 4.1 General
- 4.2 Refrigerating equipment located in the open air
- 4.3 Refrigerating equipment located in a machinery room
- 4.4 Refrigerating equipment located in the occupied space
- 4.5 Refrigerating equipment located in unoccupied areas not designated a machinery room
- 4.6 Refrigerating equipment located in a ventilated enclosure within an occupied space
- 4.7 Piping duct or shaft
- 5 Machinery rooms [Go to Page]
- 5.1 Occupancy of machinery rooms and special machinery rooms
- 5.2 Venting from or through the machinery room
- 5.3 Combustion equipment and air compressors
- 5.4 Open flame
- 5.5 Storage
- 5.6 Remote emergency switch
- 5.7 Exterior openings of the machinery room
- 5.8 Piping and ducting
- 5.9 Normal lighting
- 5.10 Emergency lighting
- 5.11 Dimensions and accessibility
- 5.12 Doors, walls, and ducts [Go to Page]
- 5.12.1 Doors and openings
- 5.12.2 Emergency
- 5.12.3 Walls, floor, and ceiling
- 5.12.4 Service ducts
- 5.12.5 Emergency ventilation ducts
- 5.13 Ventilation [Go to Page]
- 5.13.1 General
- 5.13.2 Ventilation for temperature control under normal operating conditions
- 5.13.3 Ventilation when machinery room is occupied
- 5.13.4 Emergency mechanical ventilation
- 5.13.5 Required airflow for emergency mechanical ventilation
- 5.13.6 Mechanical ventilation openings
- 5.14 Additional measures for flammable refrigerants (classes 2L, 2 and 3) [Go to Page]
- 5.14.1 General
- 5.14.2 Combustion equipment
- 5.14.3 Maximum surface temperature
- 5.15 Additional requirements for R-717
- 6 Requirements for alternative provisions [Go to Page]
- 6.1 General
- 6.2 Occupied space
- 6.3 Ventilation [Go to Page]
- 6.3.1 General
- 6.3.2 Dilution transfer openings for natural convection
- 6.3.3 Mechanical ventilation
- 6.4 Safety shut-off valves [Go to Page]
- 6.4.1 General
- 6.4.2 Location
- 6.4.3 Design
- 7 Electrical installations [Go to Page]
- 7.1 General requirements
- 7.2 Main power supply
- 7.3 Electrical equipment in machinery rooms in which a refrigerating system contains class 2L flammability refrigerants
- 8 Safety alarms [Go to Page]
- 8.1 General
- 8.2 Alarm system power
- 8.3 Alarm system warning [Go to Page]
- 8.3.1 General
- 8.3.2 Alarm for machinery room
- 8.3.3 Alarm for occupancy
- 8.4 Additional alarm system requirements for R-717 systems with charges above 4 500 kg
- 9 Detectors [Go to Page]
- 9.1 General
- 9.2 Location of detectors
- 9.3 Function of the detector
- 9.4 Type and performance of a detector [Go to Page]
- 9.4.1 General
- 9.4.2 Refrigerant detectors for A2L, A2, B2L (except for R-717), B2, A3, and B3 refrigerants
- 9.4.3 Refrigerant detectors for R-717
- 9.5 Installation
- 10 Instruction manuals, notices, and inspections [Go to Page]
- 10.1 Instruction manual
- 10.2 Warning notice
- 10.3 Visual inspection of site
- 10.4 Maintenance of the site
- 11 Heat sources and temporary high temperatures located at the site
- Bibliography [Go to Page]
