Scope and Design Capella Office Air Conditioning Upgrades

Overview Central Highlands Regional Council is seeking submissions for the mechanical and electrical design, scoping and preparation of works for the replacement of the existing office air conditioning system at the Capella Council Office. Council is seeking mechanical and electrical services for the upgrade of the AC units. Purpose The current system experiences frequent breakdowns and is nearing the end of its operational life, resulting in escalating costs for call-outs and issues finding replacement parts. These failures also cause discomfort for both staff and customers while repairs are undertaken. Scope This project involves the design, scoping and preparation of work for the replacement of the existing office air conditioning system at the Capella Council Office. The scope includes: Mechanical Services Detailed site investigation and verification of as-built conditions Assessment of the remaining operational life of the existing system Heat load calculations for all conditioned spaces Selection, sizing and design of HVAC systems (split system unless justified otherwise) Decommissioning and safe disposal of the old HVAC system (if required) Design and assessment of outside air make-up Concept and schematic (approximately 70%) design drawings, including equipment schedules and outline specifications Documentation of all necessary building works Works Installation of new air conditioning and verification of existing infrastructure Concept and schematic design, documentation and certification of mechanical and electrical systems Confirmation of system capacity as part of the design, not just commentary on existing services Advice, design and scoping to change the system to a split system, including assessment of using ceiling vents to assist with cool air distribution Assessment of the feasibility of utilising existing ductwork and vents where possible Retention of existing vents compatible with the new split-system units to minimise disruption and cost Removal and replacement of any vents or ducting found incompatible with the new system to ensure optimal airflow and system performance Confirmation of the number, location and type of vents needed to achieve consistent climate control across the facility (if required) Provision of a compliant and energy-efficient building services design suitable for Design and Construct delivery, enabling the contractor to complete detailed design and construction without major redesign Preliminary Works Review of existing air conditioning system documentation, drawings and maintenance history Site inspection(s) to assess the condition of the current air conditioning system and associated infrastructure Identification of system requirements, load calculations and any constraints impacting design Design Preparation of a design proposal for the replacement AC units, ensuring compliance with relevant Australian Standards and building codes Assessment of integration with existing Building Management Systems (BMS), electrical supply and associated controls Provision of design options considering energy efficiency, system reliability and lifecycle costs Incorporation of AC system replacement requirements within the design Scope Documentation Development of a detailed Scope of Works for the AC systems replacement, including equipment specifications (capacity, efficiency ratings, footprint), connection requirements (hydraulic, electrical, controls), demolition/removal methodology for existing equipment, installation methodology for new equipment, testing and commissioning requirements, and warranty and maintenance obligations Deliverables Report detailing the existing system and recommending the best possible solution Finalised design documentation Assessment of split-system feasibility Electrical capacity assessment Detailed Scope of Works document suitable for tendering/quoting Indicative cost estimate for replacement works Implementation timeline and staging recommendations to minimise disruption to office operations Exclusions Actual supply, installation or commissioning of new chiller/cassettes (covered under a future works contract) Upgrades to unrelated mechanical, electrical or structural systems not impacted by this replacement Contractor Requirements Standards and Compliance All design and documentation must comply with: Australian Standards AS 1668, AS/NZS 3666, AS 1851 National Construction Code (NCC) Workplace Health and Safety (WHS) requirements Instructions to Tenderers Existing HVAC design drawings are provided as Attachment C for reference.