4.13 Mechanical Service Installations
The utilities services shall accommodate future perceived advances in building technologies and IT. Flexibility is the key to implementing this requirement.
Refer to [paragraph 4.2] 'Acoustics' in relation to acceptable noise from the building services systems.
(a) Mechanical Systems
The Contractor shall design, supply, install, test and commission all mechanical building services necessary to support the activities of the Facility.
Systems shall be designed, supplied, installed, tested and commissioned in accordance with the regulations and standards and the manufacturers specifications.
(b) Building Management Systems and Controls11
The Contractor shall ensure that a central Building Management System (BMS) for the Facility is in place; providing linked control and monitoring of the centres functions and systems. The Contractor shall note that the Building Volume used in the calculation of Energy Consumption Performance Indicators shall be the Heated Volume as defined in ERIC and as calculated in accordance with the Payment Mechanism.
The design of the Facility shall maximise the security and safety of the staff, visitors and Users.
The Authority's philosophy is to provide a safe, healthy and comfortable environmental conditions for Users of the Facility, whilst focusing on energy conservation measures. The Contractor shall adopt "best practice" in order to achieve the energy target for the Facility.
The Contractor. shall ensure all plant can be operated in automatic mode (via a BMS) or manual mode. Physical bypasses shall be provided where appropriate for maintaining service, for example at control valves.
The Contractor shall install a BMS that controls all mechanical systems, security, CCTV, lifts and interfaces with all necessary features The BMS system shall monitor and assist in minimising energy consumption. The Contractor shall ensure that the Facility has a hard-wired link between the BMS and fire alarm systems to enable plant shutdown if required during fire situations.
The Contractor shall ensure that the BMS is capable of producing energy consumption reports to monitor against the Authority's requirements. The Contractor shall ensure that all major plant items shall be designed and controlled to provide "real time" status monitoring, including run, fault, and alarm reporting. This shall include boilers, pumps, pressurisation units, air handling plant, fans and air conditioning.
The BMS system shall be designed, installed and commissioned in accordance with the manufacturers' instructions.
The Contractor shall ensure
• that the programming of the outstation(s) shall be carried out in a consistent, structured manner;
• that strategies shall be kept as simple and as uniform as possible;
• that the BMS incorporates the following non-exhaustive list of features:
■ space temperature control (and humidity where relevant);
■ weather compensation / external temperature monitoring;
■ weather economy setting;
■ free cooling cycle on ventilation plant;
■ optimum Start/Stop;
■ frost Protection;
■ filter status monitoring;
■ air Quality Control;
■ lead/Lag Control;
■ domestic hot water monitoring and temperature control;
■ index circuits monitoring;
■ cold water temperature monitoring, including stored cold water;
■ common fault alarms for security, fire alarms, CCTV, staff attack, disabled alarms and nurse call; [The Authority understands the potential limitations this imposes on the choice of BMS and alarm systems and is happy to consider alternative arrangements/linking of alarms]
■ emergency lighting
■ interface with lifts;
■ UPS/emergency generators; and
■ Monitoring and recording of digital outputs from energy meters including those provided by Statutory Undertakings.
■ the Contractor shall ensure that the BMS is installed to control all plant where there is an operational requirement or a life cycle cost benefit, including the following non-exhaustive list:
■ boiler plant;
■ air handling plant;
■ ventilation plant;
■ cooling plant;
■ domestic hot water plant;
■ duty/standby control;
■ interface with lifts; and
■ UPS / Emergency Generators.
The Contractor shall ensure that all major plant items shall be designed and controlled to provide "real time" status monitoring, including run, fault, and alarm reporting. The Contractor shall ensure that this includes boilers, pumps, pressurisation units, air handling plant, fans and air conditioning.
The Contractor shall ensure that the monitoring of hot water and cold water (including tanks) is carried out throughout the Facility (not just at central plant) in order to comply with the Authority's Legionella prevention strategy. As a minimum, any temperature deviation outside the design parameters shall raise an alarm.
(c) Zone Control
The Contractor shall ensure the Facility is capable of individual temperature control for all areas to be achieved with the use of zone controls. Areas should be independently controlled dependent upon their hours of operation to ensure optimum efficiency and in discreet areas consideration should be given to localised zoning depending on the orientation of the building. Proper consideration is required to the level and extent of temperature sensing and monitoring devices so as to provide both accurate and cost effective zone control.
(d) Optimisation & Weather Compensation
The Contractor shall ensure Good Industry Practice is adhered to regarding control regimes incorporating time, optimisation and weather compensation.
(e) Heating Systems
Heating systems to all zones shall be sufficient to ensure internal temperatures in accordance with the Zone Data Sheets The heating system in all areas to provide the required inside temperature for each Zone (subject to normal external operating range of [-4oC to +28oC)], efficient operation under part occupancy, minimise fuel consumed and the environmental impact and items of high surface temperature are to be placed outside the normal reach of the public.
The Contractor is required to measure the desired inside temperature at a height of one metre in the centre of the space using instruments used for the measurement of temperature that have been checked against UKAS certified references of appropriate accuracy.
Measurement accuracy shall be within a tolerance of [ +/- 0.7°C ]for 95% of measurements over the temperature range of [15 to 25°C], and within a tolerance of [+/- 1.0°C] for measurements outside that range.
The need to maintain acceptable comfort conditions is of paramount importance and The Contractor shall develop strategies for achieving optimum comfort together with minimum energy consumption.
Multi-purpose spaces shall have heating equipment capable of being controlled to deliver the required temperature to suit the activity.
Space heating and water heating are to be capable of independent operation, and available 24 hours per day, with heating controlled both on a whole property and zone by zone basis. The Contractor shall provide good quality heat emitters to ensure satisfactory heat distribution within the area served.
The Contractor shall provide heating systems having considered the following features and requirements:
There shall be temperature and ventilation night set-back facility such that all heating systems provide both frost and condensation protection;
All heating appliances shall have safe surface temperatures or be out of reach or suitably protected;
There shall be valve isolation such that isolation of circuits/sub-circuits shall have minimal disruption to the remaining zones
Consideration shall be given to the efficient recycling of heat within the new Leisure Facility.
(f) Ventilation and Cooling
The Contractor shall provide natural and mechanical ventilation and comfort cooling, to suit the Facility and the requirements as stated in the Zone Data Sheets, taking full consideration of the Authority's preference for natural ventilation wherever possible to achieve this, including provision where possible for night cooling through use of external air.
Where rooms are clearly intended to be occupied and/or become internal spaces during design development and natural ventilation is not possible, mechanical ventilation and/or extract ventilation shall be provided to suit the function of the space.
Ventilation is to be provided to appliances where such ventilation is required to allow their normal and safe operation. The heating, ventilation and air conditioning systems shall be logically designed to operate efficiently and the Contractor shall ensure heat gain from all equipment and Users and personnel is allowed for in sizing and selection of the systems.
Where grilles or diffusers are used within rooms the Contractor shall ensure they are arranged to avoid draughts and designed to minimise noise intrusion into the space.
(g) Local Exhaust Ventilation Systems (LEV)
The Contractor shall provide all LEV systems including, but not limited to, that required to support the provision of catering, [and other facilities provided on Site requiring exhaust ventilation].
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11 This seems to duplicate/overlap with a previous section; should they be combined?