Educational Facility Air Conditioning Solutions by Daikin Air Conditioning

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Educational Facility Air Conditioning Solutions

Daikin Air Conditioning

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Description

Daikin Air Conditioning Variable Refrigerant Volume (VRV) solutions with fresh air processing for heating, cooling and indoor air quality treatment (VRV AHU and Rooftop package units with economiser cycle) are generally used for education facilities.

1. Daikin VRV system is a multi-split type air conditioner (one outdoor unit with multiple indoor units) for commercial buildings that uses variable refrigerant flow control developed by Daikin to provide customers with the ability to maintain individual zone control in each room and floor of a building.

VRV indoor units that are generally used:

Highwalls (wall mounted)
Ducted Units (ceiling concealed) — complete with inbuilt drain pumps
Cassettes (ceiling mounted) — Roundflow cassettes with sensing panel or compact cassettes (600 x 600mm fully flat)
Under-ceiling (ceiling suspended)
Outdoor Air Processing unit (ceiling concealed)

2. VRV AHU (Air handling unit) is a system that pre-conditions outdoor air for ventilation purposes as required by the Building code and reduces operational load of air conditioning system. It consists of VRV outdoor units and air handling unit (filters, heat exchangers, dampers, fans in a framed casing) designed based on the client’s requirements.

3. Rooftop package unit is a system that contains all the components in one concise unit and provide conditioned air for large open space applications. This system can be also paired with Economiser kit that allows modulations of outdoor air and return air mixture for even further reduction of total operational load of air conditioning systems. It usually serves for bigger spaces like gyms or assemblies.

Education pack can also include:

Interfaces for opening window
Temperature setback
After hours use and scheduling
Central remote controller
Web access for off-site control (optional)
Bacnet interface (optional)
Energy monitoring (optional)

Wifi capabilities vary and are individual to each project and application

Key Features

Optimised heating, cooling and fresh air treatment solution for education facilities
Internally engineered to meet the requirements of NZS 4303:1990
Extended warranty to 7 years for MOE specific requirements
Included Daikin Gold Health check pack for 7 years to provide continued long term optimisation
Low energy use with heat recovery. Long piping runs to suit a variety of applications
Adjustable fan speeds of indoor units to meet acoustic requirements

Scope of Use

Scope of Use is dictated by required capacity of air conditioning system and design conditions that should fall into Operation Range of the chosen system:

VRV heat pumps systems (non-simultaneous heating and cooling) come in 2 main series:

VRV-S/VRV-S HSE (horizontal discharge, smaller units: 9-24 kW Cooling / 10-26 kW Heating) and VRV H (vertical discharge, bigger units: 16-168 kW Cooling / 18-189 kW Heating)
VRV R heat recovery systems (simultaneous heating and cooling) come as vertical discharge units from 16 to 168 kW Cooling/18-189 kW heating

Operation range:

VRV H and VRV R: Cooling: -5 to 49 CDB Heating: -20 to 15.5 CWB
VRV-S HSE: -5 to 52 CDB Heating: -20 to 15.5 CWB
VRV-S: -5 to 46 CDB Heating: -20 to 15.5 CWB
VRV indoors: Cooling: 20CDB/14CWB to 32 CDB/24CWB Heating: 14 to 24 CDB

VRV AHU (Standard Series):

Capacity Range: 15.4-167.6 kW (9 models)
Airflow Range: 900- 7800 L/s
Operation Range:

Cooling: -5 to 49 CDB
Heating: -20 to 15.5 CWB

Entering t C on Heat Exchanger AHU:

Cooling: 20CDB/14CWB to 32 CDB/24CWB
Heating: 14 to 24 CDB

VRV AHU (Outdoor Series):

Capacity Range: 25.7- 202.6 kW (9 models)
Airflow Range: 566- 4550 L/s
Operation Range:

Cooling: -5 to 49 CDB
Heating: -20 to 15.5 CWB

Entering t C on Heat Exchanger AHU:

Cooling: 19 to 43 CDB
Heating: -5 to 15 CDB

Packaged Units:

Capacity Range (Standard Series UAYQ):

16.3-84.2 kW Cooling/15.2-91 kW Heating

Airflow Range: 732-4540 L/s
Operation Range:

Cooling: 0 to 52 CDB
Heating: -15 to 18 CWB

Capacity Range (Premium Series UAXYQ powered by VRV outdoor units):

135 kW Cooling/150 kW Heating and Airflow 2880-7200 l/s or 185 kW Cooling/200 kW Heating

Airflow Range: 3840-9600 l/s
Operation Range:

Cooling: -5 to 49 CDB
Heating: -20 to 15.5 CWB

VRV outdoor units are recommended to installed outdoors to keep free air circulation around them and prevent overheating/short cycling. All coils have Blue fin anti-corrosion coating.

Package units are designed to be installed outdoors with its standard corrosion treatment and insulation. AHUs can be installed not only indoors but also outdoors with optional corrosion treatment and certain insulation thickness.

Limitations on Use

Certain connection ratio and max piping length rules between VRV outdoor unit and indoor units/AHU should be considered and met
Systems should not be used in corrosive indoor environments and high humidity applications (e.g. swimming pools)
For corrosive outdoor environments, additional treatment is required such as Blygold
Outdoor VRV units are not recommended to install in enclosed spaces unless required air intake volume and exhaust provided to and from the space.
Refrigerant concentration compliance with AS/NZS 5149.1 & 5149.3 to be considered if VRV systems (R410A) used. Daikin offer an assistance with refrigerant concentration compliance volumes and mitigation methods on project basis
Daikin systems are designed for human comfort only — contact the Daikin team to discuss other applications
Please contact Daikin for full information

Statement of Building Code Compliance

Full range of Daikin products have been tested and registered in accordance with MEPS requirements (Minimum Energy Performance Standards)
Refrigerant leak detectors can be provided by Daikin with VRV systems to comply to standard AS/NZS 5149.1 and 5149.3

In-Service History

Daikin systems have been installed in many education facilities. Please, see some examples below:

Manaia View School — Single Split product (residential and Sky Air)
Ngunguru Scholl- Single split product (residential and Sky Air)
Willowbank Primary school- VRV H, VRV-S and residential single splits
Torbay School- VRV H and iTM central controller
Wanaka South Primary School- VRV R, residential single spits, iTM central controller
Marshlands School- VRV R, iTM central controller and Bacnet interface for BMS system
Prebbleton School — VRV-S and VAM product
Holy Trinity School — VRV-S, residential split, VAM, iTM central controller
Christchurch East School — VRV H heat pump, VRV-S, VAM units, ITM central controller

Other Performance Attributes

The VRV solution comes with the option of VRT smart technology. This technology allows the fluctuation of the refrigerant temperature. This provides better thermal comfort of the supply air temperature provided to the occupants and results in energy savings.
Blygold Coatings (on request)will prolong the life of the outdoor unit coupled with a maintenance plan.
Daikin is able to provide in-house modelling of airflow and temperature distribution in the installation spaces (CFD analysis) for their VRV for their VRV and Chilled water systems to ensure plant spaces are accurately designed to accommodate Daikin systems. This analysis will also give an indication if the units will be short cycling, creating inefficiencies in the operation.
Refrigerant leak detectors can be provided by Daikin with these VRV systems to comply to standard AS/NZS 5149.1 and 5149.3

Warranty

Extended warranty to 7 years for MOE specific requirements
Included Daikin Gold Health check pack for 7 years to provide continued long term optimisation