H-EMS Commissioning Policy

 

Introduction

This commissioning policy outlines the processes, responsibilities, and standards required to deliver fully operational, safe, and energy efficient building systems, including HVAC and Building Management Systems (BMS).

 

The policy is aligned with the principles of CIBSE Commissioning Code C and ensures that all systems are tested and adjusted to meet the design specifications and operational requirements while optimizing performance for energy efficiency and sustainability.

 

Policy Objectives

The key objectives of this commissioning policy are to:

• Verify that systems operate safely and effectively as per the design intent.
• Optimize the performance and energy efficiency of the systems.
• Ensure compliance with industry standards and regulations, including CIBSE Code C.
• Deliver accurate documentation of commissioning activities for future reference and handover.

 

Scope

This policy applies to the commissioning of HVAC and BMS systems in new installations and refurbishment projects. It includes:

• Pre-commissioning checks and inspections.
• Functional testing of individual components.
• System integration testing.
• Performance validation against design intent.
• Documentation and client handover.

 

Responsibilities

Client

• Define the commissioning requirements within the project specifications.
• Appoint experienced and qualified commissioning professionals.
• Ensure sufficient time and budget allocation for commissioning activities.

 

Main Contractor

• Coordinate all commissioning activities across disciplines.
• Provide mechanically balanced systems ready for BMS commissioning.
• Facilitate access to detailed documentation, drawings, and systems.

 

Mechanical Contractor

• Perform system installation in line with design specifications.
• Complete system balancing and provide written confirmation of completion before BMS commissioning commences.
• Rectify any mechanical installation issues identified during pre-commissioning checks.

 

Commissioning Engineer

• Plan, execute, and document all pre-commissioning and commissioning processes.
• Ensure compliance with the design intent, industry standards, and regulations.
• Provide accurate records and assist in the handover process.

 

Commissioning Process

Pre-Commissioning

Prior to commissioning, all systems must undergo pre-commissioning checks, which include:

System Readiness:

• Verify that installation works are complete and meet design specifications.
• Ensure all equipment is securely installed and accessible for testing.

Documentation Review:

• Review as-built drawings, O&M manuals, and manufacturer guidelines.
• Confirm that all safety and compliance certificates are in place.

Safety Checks:

• Inspect isolation points and emergency stops for proper operation.
• Test electrical connections and verify the integrity of wiring and containment.

System Inspection:

• Inspect sensors, actuators, valves, dampers, and other components for defects or damage.
• Verify that all labels and identification markers are correctly installed.

 

Functional Testing

The functional testing phase ensures that individual components operate correctly:

• Test HVAC components such as fans, pumps, valves, and dampers for proper operation.
• Test BMS controllers, sensors, and actuators for correct signal processing and response.
• Validate control loops, setpoints, alarms, and interlocks.

 

Integration Testing

Integration testing ensures that all subsystems work seamlessly together:

• Test communication between HVAC and BMS systems via BACnet or other protocols.
• Confirm the functionality of networked systems, including remote access and monitoring.

 

System Balancing

Mechanical systems balancing must be completed by the Mechanical contractors before BMS commissioning begins. This includes:

• Adjusting flow rates, pressures, and temperatures to meet design parameters.
• Mechanical contractors must provide written confirmation of balancing completion.

 

Performance Validation

The final step in the commissioning process is performance validation:

• Test the system under normal operating and fault conditions.
• Verify energy efficiency performance against benchmarks.
• Ensure that all systems respond appropriately to BMS commands.

 

Handover Process

Commissioning Documentation

Provide the following documents to the client as part of the commissioning process:

• Pre-commissioning checklists.
• Functional and performance test results.
• Calibration reports for sensors and actuators.
• System benchmarks and performance data.

 

Client Handover Package

A comprehensive handover package must include:

• Updated as-built drawings.
• Finalized O&M manuals.
• Training materials and a schedule for operational training sessions.
• Contact details for ongoing support and maintenance.

 

Post-Commissioning Support

• Conduct seasonal commissioning to verify system performance under varying environmental conditions.
• Offer remote monitoring services for performance tracking and fault diagnostics.
• Schedule periodic maintenance and system audits to ensure continued efficiency.

 

Exclusions

The following activities are excluded from this commissioning policy:

• Design Errors: Rectifying design or specification errors is not part of the commissioning scope.
• Installation Defects: Mechanical and electrical contractors are responsible for correcting installation defects.
• Post-Handover Adjustments: Fine-tuning and optimization after the warranty period.

 

Compliance and Standards

All commissioning activities will adhere to the following standards and guidelines:

• CIBSE Commissioning Code C
• Relevant BS and EN standards for HVAC and BMS
• Manufacturer recommendations for equipment and system components