When are UPS Systems Required Under BS 9251 Guidelines?

Ensuring fire safety in residential buildings goes beyond simply installing sprinklers; reliable power sources are essential to keep these systems operational at all times. The BS 9251:2021 standard for fire sprinkler systems sets specific requirements for power backup, including an automatic switchover capability. But when exactly are UPS systems necessary? Let’s break down the BS 9251 guidelines and when a UPS should be part of your fire safety strategy.

Understanding BS 9251:2021 and its Power Requirements

The BS 9251:2021 is a British Standard specifying the design, installation, and maintenance of sprinkler systems in residential buildings, from single-family homes to multi-story apartment blocks. This standard applies nationwide across the UK, setting technical and operational requirements for effective fire suppression.

BS 9251:2021 specifies that sprinkler systems must include two power sources (a primary and secondary power source) to ensure functionality during emergencies:

Mains Power: The primary power source for normal operation.
Uninterruptible Power Supply (UPS): The secondary power source to take over if mains power fails.

To meet BS 9251:2021, the UPS must have an automatic transfer switch that can seamlessly switch from mains to UPS power during an outage. This feature ensures there is no interruption in power to the sprinkler system, maintaining crucial functionality when it’s needed most.

When are UPS Systems Required?

BS 9251 itself does not mandate UPS systems in all installations. However, the standard introduces the concept of an “enhanced power supply” for high-rise buildings over 18 metres. This is a mandatory requirement, however many clients, such as this high-end luxury residential apartment, now request enhanced power supply systems even when not strictly required, as it provides greater reliability.

Here are specific scenarios where a UPS system is either required or recommended under BS 9251:

Multi-story and High-Risk Residential Buildings: For residential buildings that house vulnerable occupants, such as care homes, or for high-rise buildings over 18 metres, BS 9251 mandates an enhanced power supply, which includes a robust UPS system. In these settings, uninterrupted power is crucial to ensure that sprinkler systems remain operational regardless of grid stability, meeting the increased safety needs of such properties.
Properties with Water Storage Tanks: Many sprinkler systems draw water from storage tanks, requiring electric pumps to maintain water pressure. In the event of a mains power failure, a UPS system is necessary to keep these pumps operational. BS 9251 suggests that any building relying on stored water, as opposed to a direct mains connection, should have a backup power source to maintain system reliability.
Projects with Low-Reliability Power Supplies: For buildings in areas with frequent power interruptions, BS 9251 recommends a UPS to ensure system dependability. Developers and building managers are advised to assess the local power grid’s reliability, especially in rural or remote areas, where outages could compromise fire safety systems. A UPS with an automatic transfer switch can seamlessly take over, preventing any disruption to sprinkler functionality.
Compliance with Local Building Regulations: Building regulations in regions like Wales, where all new residential buildings must have sprinklers regardless of height, may require additional safeguards such as UPS systems. While BS 9251 does not make UPS mandatory for all installations, local building codes may impose stricter requirements based on occupancy, building height, or location-specific risk factors. In such cases, a compliant UPS with enhanced power supply capabilities is recommended.

Meeting Power Backup Requirements with ResiPOWER®

Dutypoint’s ResiPOWER® system provides a robust UPS solution that meets and exceeds the BS 9251:2021 requirements. Designed specifically for the residential fire sprinkler market, ResiPOWER® offers high performance and reliability, addressing the critical challenges outlined in the standard:

Automatic Transfer Switch and Enhanced Power Supply: With its automatic transfer capability, ResiPOWER® ensures seamless switchover from mains power to UPS. For high-rise buildings, where BS 9251 mandates an enhanced power supply, ResiPOWER® provides reliable support with options that allow autonomy of 30 to 60 minutes, depending on building category and risk.
Modular and Compact Design: Engineered for easy installation in tight locations, ResiPOWER®’s modular design allows it to fit even where space is limited. The system’s flexibility also extends to configuration, with external battery cabinets available for increased autonomy.
User-Friendly Monitoring and Safety Features: ResiPOWER® units include LCD status displays and communication options for integration with Building Management Systems (BMS) for remote monitoring. The system’s audible and visual alarms ensure swift response in case of faults or power failures, enhancing safety.
Reliability with High Efficiency: With options like true-online UPS functionality and up to 98% efficiency in ECO mode, ResiPOWER® minimises energy consumption while ensuring stability. Its internal components, such as cold-start capability, further safeguard uninterrupted operation under various conditions.

ResiPOWER® offers a range of customisable options to suit different needs. From additional battery cabinets that extend run-time to fire-rated cable connections, Dutypoint’s ResiPOWER® line addresses the diverse requirements of modern residential fire safety systems.

4 Key Benefits of Installing a UPS System for Sprinklers

Enhanced Reliability: UPS systems ensure pumps keep running during power cuts, preventing interruptions in sprinkler operation.
Automatic Switchover: With an automatic transfer switch, the system seamlessly shifts from mains to UPS power, eliminating delays in sprinkler activation.
Improved Compliance: An enhanced power supply with automatic transfer capability helps meet both BS 9251 and region-specific building regulation requirements, especially in high-risk buildings.
Peace of Mind: For property managers, knowing that sprinkler systems remain active regardless of power issues provides reassurance and enhances safety.

Power Up Your Fire Safety Strategy with Dutypoint’s Unstoppable UPS Solutions

Installing a UPS system for fire sprinkler pumps is more than a requirement; it’s a proactive choice for enhancing safety, reliability, and peace of mind. A reliable UPS solution guarantees that sprinkler systems remain operational during power outages, ensuring compliance with BS 9251 and local regulations, especially in high-risk or multi-story buildings. Beyond meeting guidelines, a quality UPS offers benefits like seamless automatic switchover and reduced energy consumption, supporting both the safety and efficiency of your fire safety setup.

Dutypoint’s ResiPOWER® range is the ideal choice for UPS and pump needs, providing robust, versatile, and high-performance systems specifically designed for residential fire protection. With features like modular designs for tight spaces, sprinkler-proof enclosures, and extensive technical support, ResiPOWER® ensures dependable compliance and unmatched reliability.