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Refrigerating systems and heat pumps. Safety and environmental requirements. Part 3: Installation site and personal protection
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Refrigerating systems and heat pumps. Safety and environmental requirements. Part3: Installation site and personal protection
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Basic data
| Standard ID | SB/T 10345.3-2012 (SB/T10345.3-2012) |
| Description (Translated English) | Refrigerating systems and heat pumps. Safety and environmental requirements. Part 3: Installation site and personal protection |
| Sector / Industry | Domestic Trade Industry Standard (Recommended) |
| Classification of Chinese Standard | J73 |
| Classification of International Standard | 27.080; 27.200 |
| Word Count Estimation | 17,189 |
| Older Standard (superseded by this standard) | SB/T 10345.3-2001 |
| Quoted Standard | GB/T 24040; ISO 12100 |
| Adopted Standard | EN 378-3-2008, NEQ |
| Regulation (derived from) | ?Ministry of Commerce Announcement 2012 No.47; Industry Standard Filing Announcement 2012 No.9 (Total No.153) |
| Issuing agency(ies) | Ministry of Commerce of the People's Republic of China |
| Summary | This standard specifies the safety requirements for the installation site. Applicable to the installation site and personal protection. |
SB/T 10345.3-2012: Refrigerating systems and heat pumps. Safety and environmental requirements. Part 3: Installation site and personal protection
---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Refrigerating systems and heat pumps. Safety and environmental requirements. Part 3. Installation site and personal protection
ICS 27.080; 27.200
J73
Record number. 37193-2012
People's Republic of China domestic trade industry standard
Replacing SB/T 10345.3-2001
Refrigeration systems and heat pump safety and environmental requirements
Part 3. Installation location and personal protection
Part 3. Instalationsiteandpersonalprotection
Published on.2012-08-01
2012-11-01 implementation
Published by the Ministry of Commerce
Content
Foreword III
1 Scope 1
2 Normative references 1
3 Installation location of refrigeration equipment 1
4 computer room 2
5 electrical installations 6
6 Security Alert 6
7 detector 7
8 User Manual and Precautions 8
9 hot surface and short high temperature 9
Appendix A (informative) Personal protective equipment 10
Reference 12
Foreword
This standard uses the redrafting method, refer to the European Committee for Standardization (CEN) Technical Committee 182 (TC182) (referred to as CEN/
TC182) Developed EN378 "Safety and Environmental Requirements for Refrigeration Systems and Heat Pumps" and the degree of conformity with EN378-3.2008
Is not equivalent.
SB/T 10345 “Safety and Environmental Requirements for Refrigeration Systems and Heat Pumps” is divided into four sections.
--- Part 1. Basic requirements, definitions and classifications;
--- Part 2. Design, construction, testing, marking and preparation;
--- Part 3. Installation location and personal protection;
--- Part 4. Operation, maintenance, overhaul and recycling.
This standard covers the safe operation and environmental protection of the personal and property related to the refrigeration system and heat pump, especially to prevent the diffusion of refrigerant.
The stringent provisions are listed for the damage of the atmospheric ozone layer and the impact of the global warming effect. It is the refrigeration system in the refrigeration and air conditioning industry today.
A basic standard that is more detailed and complete in the context of the heat pump.
This standard retains the main content of the original version, only for a small part of the content, such as the definition of the terms and conditions that have been formulated and are being approved in China.
There are duplicate clauses in the standards or industry standards, as well as statements that are inconsistent with China's national conditions in the articles, and the necessary additions and deletions have been made.
This standard was proposed by the Ministry of Commerce of the People's Republic
This standard is under the jurisdiction of the National Refrigeration Standardization Technical Committee.
This standard was drafted. China Refrigeration Society, Jiangsu Baixue Electric Co., Ltd., Xi'an Jiaotong University, domestic trade engineering design and research
Research Institute, National Commercial Refrigeration Equipment Quality Supervision and Inspection Center.
The main drafters of this standard. Yu Bingfeng, Hu Wangyang, Qi Pengcheng, Li Tiantian, Chang Lin, Liu Xiaopeng, Xiao Yang.
The previous versions of the standards replaced by this standard are.
---SB/T 10345.3-2001.
Refrigeration systems and heat pump safety and environmental requirements
Part 3. Installation location and personal protection
1 Scope
See “Scope” in Part 1 of this standard.
This section specifies the safety requirements for the installation site and is applicable to the installation site and personal protection.
2 Normative references
The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this article.
Pieces. For undated references, the latest edition (including all amendments) applies to this document.
GB/T 24040 Environmental Management Life Cycle Assessment Principles and Framework (GB/T 24040-2008, ISO 14040.2006,
IDT)
ISO 12100 Mechanical Safety Design General Risk Assessment and Reduction
3 Installation location of the refrigeration equipment
3.1 Overview
Refrigeration equipment can be placed outdoors or in a designated machine room, or placed in a manned or unmanned location that is not used as a machine room.
3.2 Refrigeration equipment is located in the open air
Refrigerating equipment placed in the open air should be protected from leaking refrigerant into buildings or other buildings in the vicinity when determining its specific location.
Free from harm to people. If the refrigeration equipment is installed on the roof, the leaking refrigerant must not flow into the roof of any fresh air or door through the roof.
Road, damper or similar orifice. Ventilation equipment shelters located in the open air should be capable of natural or forced ventilation.
Note. If a room has at least one wall grille with the largest length to make it communicate with the outside, the flow area of the grille accounts for 75%, and the grille occupies at least the wall area.
80% of the room is considered to be in the open air.
3.3 Refrigeration equipment is located in the equipment room
When the entire high-speed part of the refrigeration system or system is located in the equipment room, the requirements of 4.1~4.15 shall be met. If the refrigerant is filled in a large amount
The practical limit specified in SB/T 10345.1 allows only the refrigeration system to be located in a dedicated machine room. Mounted
The refrigeration system specified in Chapter 6 of SB/T 10345.2-2012 and the safety device described in the overpressure protection diagram can only be located in a dedicated machine.
In the room.
Note 1. Refrigeration systems containing B2, B3, A2 or A3 refrigerants may also need to meet other requirements, see 4.17.
Note 2. If the room area around the refrigeration equipment is large enough for personnel to enter, the room is treated as a computer room, and the requirements for the equipment room apply to it.
3.4 Refrigeration equipment is located in a human space
See the relevant content described in SB/T 10345.1 for the requirements for the refrigeration equipment to be located in a human space.
3.5 Refrigeration equipment is located in an unmanned area that is not used as a machine room
If the space is confined and does not communicate with any human space, the requirements for the equipment room apply. If the space is not closed and there is any place
In the same way, the refrigeration equipment is considered to be located in a human space, and the corresponding requirements apply.
3.6 Refrigeration equipment is located in a ventilated enclosure
Ventilation cabinets with a refrigeration system inside shall be fitted with ventilation pipes as specified by the manufacturer. The length of the air duct and the number of elbows must not exceed the manufacturing
Factory regulations. The ventilated enclosure is located in a space that is at least ten times the volume of the enclosure and has enough fresh air to replace the exhaust. From the machine
The exhaust of the tank should be vented to the outdoor atmosphere or to a room with the minimum volume specified in SB/T 10345.1 for manned spaces.
4 computer room
4.1 Overview
In accordance with the requirements of this standard, for safety reasons, a machine room or a dedicated machine room should be provided to house the components of the refrigeration system, especially those with high voltage.
Preparation and compressor.
Note. A closed, ventilated room can also be used as a machine room.
The following principles apply to the equipment room or dedicated machine room where the refrigeration system is located.
a) The equipment room can be used as a cooling equipment, but other equipment can also be placed;
b) The refrigerant gas escaping from the equipment room should be prevented from entering the drainage system of adjacent rooms, stairwells, yards, passages or buildings.
It is not dangerous to discharge the escaped gas;
c) should be able to evacuate the equipment room immediately if there is danger;
d) The air required for the internal combustion engine, boiler or air compressor should come from where there is no refrigerant gas. If these devices are placed in a dedicated machine
In the room, air should be supplied from outside;
e) combustibles other than refrigerant and maintenance oil shall not be stored in the equipment room;
f) a remote switch that stops the refrigeration system should be placed outside and outside the machine room;
g) Mechanical ventilation should be provided. For mechanical ventilation, separate emergency controllers should be installed outside the machine room and next to the door;
h) External exports shall not be located below the emergency exit of the stairwell;
i) All piping and ducts passing through the walls, ceilings and floors of the machine room should be well sealed;
j) should be equipped with suitable fire extinguishing equipment;
k) Alarms and detectors required by Chapters 6 and 7 shall be provided.
The above a), d), e) are not applicable to the dedicated equipment room.
4.2 Personnel occupancy in the equipment room
In the special period, if the equipment room is occupied by personnel as a workshop for building maintenance, they should be regarded as Class C places (authorized persons)
A place to enter). If the building owner or user ensures that only the delegated personnel are allowed to enter the machine room for necessary maintenance or legal
Qualified personnel performing maintenance on the refrigeration system should treat them as unmanned locations.
Dedicated equipment rooms are always considered as spaces that are not occupied by personnel.
Note 1. According to the requirements of Chapter 4, when there is some repair in the equipment room, it is advisable to have a formal familiarity with emergency protective equipment and emergency measures in the event of an emergency.
Authorized personnel appear next to the machine room.
Note 2. Refrigeration systems using the R744 may require a dedicated machine room.
4.3 Exhaust
The refrigerant should be prevented from entering the drainage system of adjacent rooms, stairwells, yards, passages or buildings, and the escape gas should be discharged to
outdoor.
No air can flow into the manned space or out of the human space through the machine room, but air can be transported through a closed air duct to prevent escape.
The gas enters the flowing air.
4.4 Emergency measures
Precautions should be taken to enable personnel to evacuate the room immediately in the event of an emergency.
There should be at least one emergency exit directly to the open air or to the emergency exit passage.
The door of the emergency exit should be able to be manually opened from the inside.
4.5 Burning equipment
If the refrigeration equipment and the combustion equipment or the air compressor are located in the same equipment room, the air duct is introduced to introduce the outdoor air supply combustion equipment.
Or an air compressor, and the refrigerant cannot enter the supplied air.
4.6 Open flame
No open flames are allowed in the engine room or in the dedicated computer room. Allowed unless the refrigerant concentration is monitored and proper ventilation is guaranteed
Fusion welding, brazing, and the like are performed indoors. However, such an open flame must not be left unattended.
Note. If the refrigerant in the refrigeration system is R744, an open flame may be allowed.
4.7 Storage
Except for the necessary compressor oil, the equipment room shall not be used to store articles. Any refrigerant and toxic or flammable materials shall be in accordance with relevant standards.
Requires storage.
4.8 Remote emergency switch
A remote switch that stops the operation of the refrigeration system should be installed next to the machine room outside the machine room. It should also be located at a suitable location inside the machine room.
Set a switch with the same function. These switches should be emergency switches that meet the requirements of the relevant standards.
4.9 External opening of the equipment room
The machine room shall not be installed within 2m from the emergency exit passage of the building or other building openings such as windows, doors, ventilation inlets, etc.
The opening of the outside.
4.10 Pipes and ducts
All pipes and ducts that pass through the walls, ceilings and floors of the machine room should have a good seal when they pass through, and the flame retardancy of the seal
It should be equal to or greater than the flame retardant properties of walls, ceilings and floors.
Note 1. The discharge piping of the pressure relief device, safety valve and fused plug may diffuse the filled refrigerant into the air by appropriate means, but should be away from the building.
Any air inlet or discharge it into an appropriate amount of suitable absorbent material.
Note 2. The A1 group refrigerant can be discharged into the equipment room from the pressure relief device, as long as the refrigeration system is filled less than the setting in Appendix B of the first part of this standard.
Limited.
4.11 Conventional lighting
Fixed lighting fixtures should be selected and installed in the space of the refrigeration unit to provide proper illumination for safe operation.
Illumination levels and locations should be determined in accordance with relevant standards. In the machine room with the R717 refrigeration system, the luminaire interface is protected by an explosion-proof sleeve.
4.12 Emergency lighting
A fixed emergency lighting system should be provided to enable control work and personnel evacuation when conventional lighting fails. Should comply with relevant standards
It is required to determine its illumination level and location.
4.13 Warning and entry
The entrance to the machine room and the dedicated machine room should be clearly marked with warnings. The warning should indicate that unauthorized persons are not allowed to enter the equipment room.
Smoking, bare lights or open flames are strictly prohibited in the machine room. The warning should also indicate that an emergency should occur only by authorized personnel who are familiar with the emergency procedures.
Decide whether to enter the machine room. In addition, the warning should clearly state that unauthorized operation of the refrigeration system is strictly prohibited.
4.14 Room size
The size of the equipment room should be such that the equipment is easy to install and there should be enough space for maintenance, operation, maintenance, overhaul and disassembly, including
The space for personnel activities of personal protective equipment. If necessary, provide a bridge channel or a fixed ladder to avoid system operation,
Stand or walk on pipes, fittings, and their support and support structures during maintenance, inspection, and repair. Located in the working channel and
Equipment above the permanent workplace should have a clearance of at least 2.1 m from the ground.
4.15 Doors, walls and ducts
4.15.1 Doors and openings
The doors of the equipment room should be opened outwards, and the number of doors should ensure that there is no blockage when evacuating personnel.
Note that the number of people in the equipment room depends on the purpose of the equipment room.
The door should be tightly sealed and can be closed by itself and can be opened indoors.
The flame retardant performance of the door shall be at least 1 h, and the materials and structures used shall comply with relevant standards.
There must be no openings to inadvertently flow escaping refrigerant, steam, odors and all other gases into other parts of the building.
4.15.2 Interior walls, floors and ceilings
All partitions, floors and ceilings between the machine room and the interior of the building shall have a flame retardancy of at least 1 h and shall be tightly sealed.
Materials and structures should comply with relevant standards.
4.15.3 Access channel
The access passage should be sealed to minimize the entry of leaking gas, and its flame retardant performance should be the same as that of the door and wall. Access channel includes internal system
The walkway and crawling space of the refrigerant line should be able to discharge the leaking gas to a safe place to prevent the accumulation of unsafe leaking gas when the leak occurs.
If a machine room is an independent fire protection space, the above requirements are not necessary, but an appropriate flame retardant inspection hole is required.
Metal plates for the production of conventional air ducts and emergency air ducts shall comply with relevant standards. Seams and joints used after assembly should be sealed to minimize
Less gas leaks from the duct. The flame retardant performance of the ventilation pipe should be the same as that of the machine room door and wall.
4.16 Ventilation
4.16.1 Overview
The ventilation of the equipment room should meet the requirements of normal operation and emergency treatment of the refrigeration system.
Once the refrigerant is released due to leakage of the system components, mechanical ventilation should be used to discharge the released refrigerant to the outside.
The wind system should be independent of any other ventilation system on site. Measures should be taken to have sufficient fresh air into the engine room and to distribute the air in the machine room.
Good and no dead zone.
The location of the fresh air inlet should be such as to avoid short-circuiting circulating air into the room.
4.16.2 Ventilation during normal operation or when the equipment room is occupied by personnel
When the equipment room is occupied by personnel, ventilation should ensure that the number of air changes in the equipment room is not less than 4 times/h.
4.16.3 Emergency mechanical ventilation
If a gas detector is required in accordance with Chapter 7, the emergency mechanical ventilation system shall be activated by a detector located in the equipment room.
Meet the requirements of Chapter 7.
Mechanical ventilation should be equipped with two independent emergency controllers, located inside and outside the machine room.
4.16.4 Airflow requirements for emergency mechanical ventilation
The air volume of emergency mechanical ventilation shall not be less than the value calculated by formula (1).
V=14×10-3·m2/3 (1)
In the formula.
V --- air volume, the unit is cubic meters per second (m3/s);
m --- The maximum refrigerant charge of the refrigeration system, all parts of the system are located in the machine room, in kilograms
(kg);
14 × 10-3---conversion coefficient.
The number of air changes in the equipment room generated by the emergency mechanical ventilation system is 15 times/h.
4.16.5 Import and export of mechanical ventilation
The size and position of the mechanical ventilation inlet and outlet should be determined on the basis of considering the characteristics of the refrigerant, the type of the inlet and outlet, and the performance of the fan.
Send enough air. The inlet and outlet should be arranged to discharge all of the refrigerant in all cases of refrigerant leakage.
4.17 refrigeration system room of refrigerant in group A2, A3, B2 or B3
4.17.1 Overview
4.17.1.1 Location
The location of the equipment room should comply with relevant standards. The location of the R717 refrigeration system room is related to the amount of charge in the system.
4.17.1.2 Emergency exhaust
The emergency exhaust fan should be a) or b).
a) a fan whose motor is located outside the exhaust gas stream;
b) Special fans for hazardous areas required by SB/T 10345.2-20126.2.13.
The position of the fan must not cause the boost of the exhaust duct system in the equipment room. Contact between the fan and the duct material shall not cause sparks.
The air outlet of the exhaust ventilation system should comply with relevant standards. There should be no restrictions on the air outlet, but you should try to prevent garbage, leaves and birds from entering.
In and out of the vent.
Note. This section does not apply to the refrigeration system room of Group B1 refrigerant.
4.17.2 Additional requirements for the R717 refrigeration system room
4.17.2.1 Drainage
In order to prevent surface water leakage containing R717, a water collection system should be set up according to relevant standards. The floor of the equipment room should be able to prevent liquid R717
Overflow from the machine room. Under normal circumstances, the drain of the catchment system should be closed.
4.17.2.2 Special equipment for emergency flushing
For R717 and other refrigerants that are corrosive or irritating to the eyes, eyewash equipment (such as eyewash bottles) should be available. For refrigerant charging
For systems with a quantity greater than 1000kg, a shower should be placed outside the emergency exit of the equipment room. The water flow rate is at least 50L per minute and the temperature is
25 ° C ~ 30 ° C.
4.17.2.3 Fire sprinkler system
Fire sprinkler systems shall not be used in the equipment room of the R717 refrigeration system.
4.17.3 Additional requirements for the A2/A3 refrigerant refrigeration system room
In the engine room of the A2/A3 refrigerant refrigeration system, the possibility of explosion may occur due to the concentration of the refrigerant reaching the lower limit of flammability.
Explosion-proof requirements should be met. If the refrigerant concentration is likely to reach the lower flammability limit, a decompression facility (such as a frangible wall or cover) should be provided.
4.17.4 Combustion equipment
The combustion equipment must not be located in the equipment room of the A2/A3 or B2/B3 refrigerant refrigeration system.
4.17.5 Maximum surface temperature
The temperature of the hot surface shall not be higher than the value of the auto-ignition temperature of the refrigerant minus 100 °C.
4.17.6 Doors and openings
If the amount of refrigerant in the A2/A3 or B2 group is greater than the practical limit, all such dedicated equipment rooms should have an outward path. Special
There should be a door in the machine room that opens directly to the open air or to a dedicated access door with a self-closing, rigidly sealed door.
5 electrical installation
5.1 General requirements
Electrical installations for refrigeration equipment and other equipment typically include lighting, power, etc., and should comply with relevant standards.
5.2 Main power supply
The main power supply connected to the refrigeration system should be able to be cut off independently with other electrical equipment, especially lighting systems, ventilation units, alarms
It is independent of similar security devices. The connection between the main power supply and the refrigeration system should comply with relevant standards.
5.3 Electrical equipment in the R717 refrigeration system room
The electrical equipment in the R717 refrigeration system room does not need to meet the requirements for hazardous area regulations.
6 security alert
6.1 Overview
If the alarm is used to alarm the leakage of refrigerant in the equipment room or in a human space, the provisions of 6.3 shall be followed. The alarm should be followed
Chapter 7 is turned on by the signal from the detector. The alarm should also alert the authorized person to take appropriate action.
6.2 Alarm system
Where an alarm system is installed, the power to the alarm system should be independent of the mechanically ventilated power source.
Note. The alarm system can be powered by a backup battery.
6.3 Alarm
The alarm system should use a high-power buzzer [15dB (A) higher than the background noise] and an audible, visual way to fire the alarm.
Newspaper. The alarm system should alert the inside and outside of the equipment room or to a local space occupied by at least personnel. For hotels and similar buildings, newspapers
The police system should issue an alert at a location and at a monitored location, such as a night gatekeeper. External alarms can be installed in the guard room or under supervision
Within the control location.
6.4 Additional requirements for the R717 refrigeration system alarm system with a filling capacity greater than 3000 kg
The owner or user of the refrigeration system should ensure that a permanent duty station is set up as the central alarm station. Fire within 60 minutes after the alarm is issued
Professionals should arrive at the scene. Firefighters can also be notified by mobile phones and pagers.
7 detector
7.1 Overview
If the refrigerant ODP >0 or GWP >0 in the equipment room and the refrigerant charge amount is greater than 25kg, the machine room should be equipped with refrigerant detection.
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