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BS EN 12828:2012+A1:2014 Heating systems in buildings. Design for water-based heating systems, 2014
- 64_e_stf.pdf [Go to Page]
- Foreword
- Introduction
- 1 Scope
- 2 Normative references
- 3 Terms, definitions and symbols [Go to Page]
- 3.1 Terms and definitions
- 3.2 Symbols
- Table 1 — Symbols used in the standard
- Table 2 — Indices used in the standard
- 4 System design requirements [Go to Page]
- 4.1 Requirements for preliminary design information
- 4.2 Heat supply [Go to Page]
- 4.2.1 General
- 4.2.2 Sizing
- 4.3 Heat distribution [Go to Page]
- 4.3.1 General
- 4.3.2 Design criteria [Go to Page]
- 4.3.2.1 Water requirements
- 4.3.2.2 Water flow rate
- 4.3.2.3 Circulation pumps
- 4.3.2.4 Pipework
- 4.4 Heat emission [Go to Page]
- 4.4.1 General
- 4.4.2 Sizing
- 4.4.3 Positioning
- 4.4.4 Thermal environment
- 4.4.5 Surface temperatures
- 4.5 Controls [Go to Page]
- 4.5.1 General
- 4.5.2 Classification
- 4.5.3 Central control [Go to Page]
- 4.5.3.1 General
- 4.5.3.2 Heat flow to the distribution system
- 4.5.3.3 Heat flow rate to attached systems
- 4.5.4 Zone control
- 4.5.5 Local control
- 4.5.6 Timing control
- 4.6 Safety arrangements [Go to Page]
- 4.6.1 General
- 4.6.2 Equipment required for sealed systems [Go to Page]
- 4.6.2.1 Protection against exceeding the maximum system safety temperature
- Figure 1 — Typical system temperature development in a fault condition [Go to Page]
- 4.6.2.2 Protection against exceeding the maximum operating pressure [Go to Page]
- 4.6.2.2.1 Safety valves, rating and arrangements
- 4.6.2.2.2 Pressure limiter
- 4.6.2.3 Safeguard against lack of water
- 4.6.2.4 Pressurisation systems
- 4.6.3 Equipment required for open vented systems [Go to Page]
- 4.6.3.1 Expansion cisterns
- Figure 2 — Installation examples of expansion cisterns [Go to Page]
- 4.6.3.2 Safety pipes and feed and expansion pipes
- 4.7 Operational requirements [Go to Page]
- 4.7.1 General
- 4.7.2 Provision for monitoring operating conditions
- 4.7.3 Temperature controller
- 4.7.4 Pressure maintaining control device
- 4.7.5 Water level adjustment
- 4.8 Thermal insulation [Go to Page]
- 4.8.1 General
- 4.8.2 Undesirable heat losses
- Table 3 — Examples of thermal transmittance classes [Go to Page]
- 4.8.3 Harmful effects of too high temperatures
- 4.8.4 Frost protection
- 5 Instructions for operation, maintenance and use
- 6 Installation and commissioning
- Annex A (informative) Control system classification
- A.1 Control system classification
- A.1.1 General
- A.1.2 Heating control system modes
- A.1.3 Control system performance modes
- A.1.4 Control system classification table
- Table A.1 — Control system classification table
- A.2 Examples of control system classification
- A.2.1 Local manual control
- Figure A.1 — Indoor temperature control system with local manual mode in an individual house
- Table A.2 — Control system classification
- A.2.2 Local manual control and central automatic control
- Figure A.2 — Indoor temperature control system with local manual mode and central automatic mode in an individual house
- Table A.3 — Control system classification
- A.2.3 Local automatic control and central automatic control
- Figure A.3 — Indoor temperature control system with an outdoor sensor, local automatic mode and central automatic mode in a multi-story residential building
- Table A.4 — Control system classification
- A.2.4 Local automatic control and automatic zone control
- Figure A.4 — Indoor temperature control system with local automatic mode and automatic zone control mode in a two-storey commercial building
- Table A.5 — Control system classification
- A.2.5 Local automatic control and central automatic control with optimisation
- Figure A.5 — Indoor temperature control system with an outdoor sensor, local automatic mode and central automatic mode with optimisation program in a multi-storey office building
- Table A.6 — Control system classification
- Annex B (informative) Thermal Environment
- Annex C (informative) Thermal insulation
- Table C.1 — Insulation classes
- Table C.2 — Insulation thickness in mm and thermal transmission coefficient for insulation classes 1 to 6
- Annex D (informative) Guidance for dimensioning diaphragm expansion vessels and pressurisation systems (sealed systems)
- D.1 General
- Figure D.1 — Pressure levels
- D.2 Expansion vessel size calculation
- Annex E (informative) Safety valves for heating systems
- E.1 Classification
- E.2 General requirements
- E.2.1 General
- E.2.2 Materials
- E.2.3 Protection against maladjustments
- E.2.4 Guidance of the moveable parts
- E.2.5 Easing gear
- E.2.6 Protection of sliding and rotating elements
- E.2.7 Design of coil compression springs
- E.2.8 Transport protections
- E.2.9 Pipes, installation and body
- E.2.10 Marking
- E.2.10.1 Marking on the body
- E.2.10.2 Marking of the safety valve
- E.3 Calculation of the relief capacity
- E.4 Requirements for safety valves marked H
- E.4.1 General
- E.4.2 Body and spring cap design
- E.4.3 Threads on the inlet and outlet
- E.4.4 Connections
- E.4.5 Calculation
- Table E.1 — Heating capacities
- E.4.6 Setting
- E.5 Requirements for safety valves marked D/G/H
- E.5.1 General
- E.5.2 Body and spring cap design
- E.5.3 Design of the valve disc
- E.5.4 Protection of sliding and rotating elements as well as springs
- E.5.5 Safety valve with back pressure compensation
- E.5.6 Setting
- Table E.2 — Nominal sizes of safety valves marked H and dimensions of pipes, expansion traps, discharge pipes in water-based heating systems with relief pressures of 2,5 bar and 3 bar
- Figure E.1 — Visual examples to Table E.2
- Table E.3 — Dimensions of feed pipes, expansion traps, discharge pipes in water-based heating systems for all pressures and safety valves marked D/G/H
- Figure E.2 — Visual examples to Table E.3
- Annex F (informative) A–deviations
- Bibliography [Go to Page]