(Fujitsu) General Australia and New Zealand

NZ VRF Controls Commissioning - Requirements and Responsibilities

This article summarises the requirements contained in the September 2025 New Zealand VRF Controls Commissioning Request Form.

Commissioning Request Information

The request form requires the following project and contact details to be completed before submission:

• Project name / number
• Fujitsu representative
• Installer and contact details
• Site name and address
• Building type
• Refrigeration contractor and contact details
• Electrical contractor and contact details
• Proposed commissioning date

Site Safety Requirements

The form asks the contractor to confirm any site-specific safety requirements, including:

• Site induction requirements, including time and location
• Hard hat requirements
• Safety vest requirements
• Long sleeve requirements
• Other required safety devices
• Whether a Safe Work Method Statement (SWMS) is required
• Any other site requests

Scope of Fujitsu Controls Commissioning

The document specifically states that attendance by Fujitsu General New Zealand Limited is for controls commissioning only.

• Commissioning of the refrigeration system remains the installer's responsibility.
• Air balancing remains the installer's responsibility.
• Systems commissioned without a Fujitsu technician present may be subject to warranty rejection where problems are determined to have resulted from poor commissioning practices, unless otherwise agreed in writing.

Installer - Work Required Before Site Attendance

Additional Indoor Functions to Confirm

• Auto Restart
• Commercial Fan Mode - fans run during the off cycle in heating, not Auto
• Memory Backup on wired remote controllers
• Indoor fan static pressure - required static pressure must be advised for relevant indoor units
• External inputs:
  • Operation / Start-Stop
  • Forced Stop
  • Thermostat Stop
  • Emergency Stop
• Master Indoor Unit - advise which unit or units are to be configured

Outdoor Functions to Confirm

• First separation tube less than 40 m
• Outdoor fan static pressure - required value must be advised
• External inputs:
  • Low Noise - required low-noise level must be advised
  • Emergency Stop
  • Electricity Meter Pulse

Controls Requirements

• Central Controller
  • Time Schedule
  • External Input
• High Level Interface - advise type, such as BACnet, LonWorks or Modbus
• Electricity Apportionment
• Signal Amps
• Network Converters
• BACnet Gateway - specific settings required from the BMS contractor

BMS Information Required

• BMS Contractor
• Contact name
• Phone
• Email
• IP Address
• Subnet Mask
• Default Gateway
• Device Instance

Installer Responsibilities

• Ensure the installation is correct.
• Ensure all ductwork is correct.
• Set the correct static pressure for all indoor units.
• Provide commissioning data to the customer, builder or consultant.
• Ensure the correct voltage is supplied to all units.
• Calculate and weigh in the correct additional refrigerant charge using digital refrigerant scales.
• Provide compliant access to all equipment.
• Provide digital refrigerant scales, digital vacuum gauge, ladders, extension leads and RCD-protected power boards.
• Train the customer on the use of all controls.

Fujitsu Commissioning Technician Responsibilities

• Address all units based on the project design and VRF series.
• Addressing may be completed by Auto function, remote controller or rotary switches, depending on the series.
• Set function settings based on project and installer requirements.
• Function settings may be completed via remote controller or DIP switches, depending on the series.
• Record all models and serial numbers for Fujitsu records.
• Check the vacuum and calculate additional refrigerant charge based on figures supplied by the installer.
• The installer weighs the additional charge into the system using electronic refrigerant scales.
• Set all addresses and function settings.
• Commission all Fujitsu controls.
• Check voltage to confirm correct single-phase and three-phase supply.
• Use the Service Tool to confirm addresses and operate the system in cooling and heating.
• Provide a warranty commencement handover letter.

Aborted Commissioning Charge

The commissioning form states that an aborted controls commissioning day may be charged at:

Sign-Off

The document must be completed and signed by the contractor, a Fujitsu representative and the Fujitsu General New Zealand Limited Business Manager. The final form also includes fields for warranty period, parts and labour.