Daikin VRV IV S Series: Advanced Air Conditioning Systems

Introduction and Energy Efficiency

Daikin's VRV systems, first launched in 1982, have continuously evolved to meet modern air conditioning needs. The VRV IV S Series is designed for high energy efficiency, featuring the EGAT No. 5 Energy Saving Label. It is suitable for both residential and commercial applications, operating on 50/60Hz with R-410A refrigerant.

The series emphasizes energy savings through technologies like VRT Smart Control, which optimizes operation for comfortable indoor environments even at low loads. Key benefits include automatic refrigerant charge function for easier installation and high reliability with backup operations.

VRV Series Overview

Daikin offers a diverse range of VRV systems:

• VRV X SERIES: Delivers new heights in energy efficiency during actual operation with advanced scroll compressors.
• VRV A SERIES: Features a compact and lightweight design for space-saving and excellent performance.
• VRV S High Seasonal Efficiency SERIES: Designed for residential houses, small offices, and shops, providing high energy efficiency and installation flexibility.
• VRV IV S SERIES: Specifically tailored for residential houses, small offices, and shops, offering sufficient capacity with a slim and space-saving outdoor unit design.
• Other series include VRV IV Q (replacement use), VRV IV W (water-cooled for tall buildings), VRV WS (water-cooled for residential), and VRV IV Heat Recovery Hot Water System.

Daikin Air Filtration and Ventilation Solutions

Daikin integrates advanced air purification and ventilation technologies into its systems:

• Air Filtration: Triple Action systems remove PM2.5 and viruses, suppress bacteria, and utilize UVC LED light and Streamer technology for enhanced air quality.
• Streamer Technology: Employs plasma discharge to decompose allergens, pollen, mould, mites, and deodorize filters.
• Air Ventilation: Ventilator/OAPU and VAM systems ensure fresh air intake, featuring Pre Cooled Paper Heat Exchangers and multi-stage filtration (Pre-Filter, Streamer Unit, Dust Collection Filter, Deodorizing Filter). The VAM-H with PM2.5 Filter ensures continuous fresh air supply even in polluted conditions.

VRV IV S SERIES: Compact & Lightweight Design

The VRV IV S series is optimized for compactness and lightweight construction. Outdoor units for 4, 5, and 6 HP models feature a reduced height of 990 mm, providing a sleek aesthetic and minimal installation space. This represents a significant reduction in height (26%) and weight (43%) compared to previous VRV II S series models. The footprint is also reduced by 58%.

Key Dimension & Weight Comparisons:

VRV IV S SERIES: Enhanced Lineup and Indoor Unit Variety

The VRV IV S series expands its capacity range to include 8 HP and 9 HP models, catering to a wider variety of room sizes and applications. The system supports a mixed combination of VRV indoor units and residential indoor units, offering flexibility in system design and a wide selection of stylish and quiet indoor unit options.

VRV Indoor Unit Lineup

Available indoor unit types include:

• Ceiling Mounted Cassette: Round Flow Cassette with Sensing, Round Flow Cassette, Compact Multi Flow Cassette, Double Flow Cassette, Single Flow Cassette.
• Ceiling Concealed Duct: 3D Airflow Duct with Sensing, Slim Duct (Standard), Bedroom Duct, Slim Duct (Compact).
• Ceiling Suspended: Middle Static Pressure Duct, Middle-High Static Pressure Duct, High Static Pressure Duct, Outdoor-Air Processing Unit, 4-Way Flow Ceiling Suspended, Ceiling Suspended.
• Many units are available with Streamer Technology.

Additional unit types include Wall Mounted, Floor Standing, Clean Room Air Conditioner, Heat Reclaim Ventilator, and Duct Streamer Chamber.

VRV IV S SERIES: Main Features

Energy Saving: Higher Coefficient of Performance (COP)

The VRV IV S series demonstrates superior energy saving performance compared to the VRV III S series, with higher COP values across various HP capacities.

Quiet Operation: Nighttime Quiet Operation Function

This function automatically reduces nighttime operating sound by lowering operation capacity, ensuring a quiet environment. Three selectable modes are available to meet different sound level requirements, making it ideal for residential areas.

VRV IV S SERIES: Cutting-edge Technologies

The series incorporates advanced technologies for efficiency and performance:

• High Efficiency Compressor: Features a Reluctance DC motor for increased power and energy savings.
• Smooth Sine Wave DC Inverter: Optimizes motor rotation for improved operating efficiency.
• Swing Compressor: Enhances compressor efficiency, quietness, and durability by preventing refrigerant leakage and wear.
• Structural Scroll: Achieves high efficiency compression by compressing gas before heating.
• Smooth Air Inlet Bell Mouth and Aero Spiral Fan: Designed to reduce airflow turbulence and sound.
• DC Fan Motor: Provides improved efficiency, especially at low speeds.

Design Flexibility and Simplified Installation

The VRV IV S series offers enhanced design flexibility and simplified installation:

• Connectable up to 14 Indoor Units: A single outdoor unit can support up to 14 indoor units, providing a versatile system.
• Automatic Test Operation: Streamlines system checks by automatically testing wiring, stop valves, piping, and refrigerant charge.
• Simple Wiring and Piping Connection: Utilizes a Super Wiring System for shared wiring and the DIII-NET communication system. The REFNET Piping System simplifies installation with fewer refrigerant lines and small-diameter piping.

Long Piping Design: The system supports long piping lengths, offering flexibility in installation positions and simplifying system planning. Maximum piping lengths can reach up to 300 meters, with maximum level differences up to 50 meters, depending on the configuration.

Specifications and Outdoor Unit Combinations

VRV IV S SERIES: Outdoor Unit Specifications

Key specifications for the VRV IV S Series outdoor units (RXMQ4AVES to RXMQ9AY1S) include:

Outdoor Unit Combinations

The capacity index and total capacity index for combinations of outdoor units with indoor units are detailed in the table below, indicating the range of connectable indoor units.

Option List

Various options are available for VRV IV S Series outdoor units, including header packs, REFNET components, central drain plugs, and fixtures for preventing overturning.

Daikin Engineering Supports

Daikin provides comprehensive engineering support for VRV systems, assisting consultants, architects, engineers, and dealers. This includes software, simulation results, and drawing materials for Business Information Modeling (BIM).

Design Support

For consultants and architects, support covers heat load calculation, CFD simulation to optimize outdoor unit layouts, design flexibility, model selection, and drawing materials support.

Sales Proposal Support

For air conditioning engineers and dealers, support includes heat load calculation and model selection.

Software Tools

• VRV Xpress: Flexible design software for optimizing equipment selection.
• DT FLOW II: CFD simulation software for optimizing outdoor unit layouts.
• DACCS-HKGSG and HKGSA: Software for steady-state heat load calculation.
• CAD Symbols: 2D CAD symbols and 3D Revit data for VRV system design.

Important Safety Information and Cautions

Warnings

Installation: Always use a qualified installer or contractor. Do not attempt self-installation, as it can lead to refrigerant leakage, electrical shock, fire, or explosion.

Parts and Accessories: Use only Daikin-supplied or specified parts. Unauthorized parts or improper installation can cause similar hazards.

User Manual: Read the user's manual carefully for important safety instructions and warnings.

Cautions on Product Corrosion

• Avoid installation in areas with corrosive gases (acid or alkaline).
• If installing near the sea shore, avoid direct exposure to sea breeze. Consult your local distributor if installation is necessary.

This product complies with TIS1529-2561 and covers air conditioner total cooling capacity up to 18000 W. Daikin VRV is a trademark of Daikin Industries, Ltd.