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install a VRV Aircon System

How to Install a VRV Aircon System in Singapore: A Comprehensive Guide

After going through this article, you will be able to install a VRV aircon without professional assistance. In Singapore’s hot and humid climate, having an efficient air conditioning system is essential for comfort at home or in the office. The Variable Refrigerant Volume (VRV) air conditioning system is a popular choice due to its energy efficiency and flexibility in cooling multiple zones. This article provides a step-by-step guide on how to install a VRV aircon system in Singapore.

Install a VRV Aircon System in Singapore

A VRV aircon system, developed by Daikin, controls the amount of refrigerant flowing to each indoor unit, allowing for precise temperature control in different zones. This system consists of one or more outdoor units connected to multiple indoor units, which can be individually controlled. 

A VRV aircon system installation is a tricky DIY task that requires the right tools, proper understanding, and attention to detail. However, installing a VRV aircon system was not as easy as it will be after following the installation tips. 

Pre-installation Tips

Before installing a VRV aircon system, it is essential to prioritize safety. Ensure that all electrical circuits related to the aircon system are turned off to prevent any risk of electric shock. Wear safety gloves goggles, and use insulated tools. Always follow the specific instructions provided by the manufacturer of your VRV system.

Gather the necessary tools and materials before beginning the installation. These include screwdrivers, a drill and drill bits, a pipe cutter and bender, a vacuum pump, a refrigerant manifold gauge set, insulation tape, and the VRV system components (outdoor unit, indoor units, refrigerant pipes, and control cables).

VRV Aircon System Installtion Tips

Planning the Installation

Start by planning the system’s layout. Decide on the locations for the outdoor and indoor units, ensuring they meet the manufacturer’s specifications for clearance and ventilation. For the outdoor unit, choose a well-ventilated area that is easily accessible for maintenance, ensuring the unit is placed on a stable, level surface. For the indoor units, identify the rooms or zones that need cooling, ensuring the units can distribute air evenly.

VRV Aircon System installation

Installing the Outdoor Unit

Begin by mounting the outdoor unit on a stable platform or bracket, ensuring it is level. Attach the refrigerant pipes to the outdoor unit using a pipe cutter and bender to fit the pipes as needed. Ensure the connections are tight to prevent leaks. Connect the control and power cables to the outdoor unit according to the wiring diagram provided by the manufacturer.

Installing the Indoor Units

Next, mount the indoor units on the walls or ceilings in the predetermined locations, ensuring they are level and firmly attached. Attach the refrigerant pipes from the outdoor unit to the indoor units, insulating the pipes to prevent condensation. 

Install drain pipes to each indoor unit to remove condensate water, ensuring the pipes are sloped downward to allow proper drainage. Connect the control and power cables to each indoor unit according to the wiring diagram provided by the manufacturer.

Connecting and Insulating Refrigerant Pipes

Once all units are mounted and connected, ensure all refrigerant pipes are securely connected between the indoor and outdoor units. Wrap the refrigerant pipes with insulation tape to prevent heat loss and condensation, securing the insulation with cable ties or tape.

Vacuuming the System

Before charging the system with refrigerant, it’s crucial to remove any air and moisture from the pipes. Connect the vacuum pump to the service port on the outdoor unit using the refrigerant manifold gauge set. Turn on the vacuum pump and let it run until the system reaches the required vacuum level, usually indicated on the gauge. Once the vacuum is achieved, close the valves on the manifold gauge and turn off the vacuum pump.

Charging the System with Refrigerant

Refer to the manufacturer’s instructions for the correct type and amount of refrigerant required for your VRV system. Connect the refrigerant tank to the manifold gauge and slowly add refrigerant to the system, monitoring the pressure gauges to ensure the correct amount is added. Use a leak detector to check all connections for any signs of refrigerant leaks, tightening connections as necessary.

Powering On and Testing the System

Turn on the electrical circuits to restore power to the aircon system. Turn on each indoor unit and set the desired temperature, ensuring each unit operates correctly and cools the designated area effectively. Monitor the system for unusual noises or performance issues, adjusting settings as necessary to optimize cooling.

installing VRV Aircon System

Enlist Professional Assistance to Install a VRV Aircon 

If you’re uncomfortable with any part of the installation process, consider hiring a professional VRV aircon installation service like LS Aircon Servicing Singapore, which offers aircon installation, gas top-up, and aircon repair services. Moreover, regular maintenance checks are essential to ensure the system operates efficiently. Clean filters, inspect connections, and check refrigerant levels periodically. 


In conclusion, if you Install a VRV aircon system in Singapore, it can significantly improve indoor comfort by providing efficient and customizable cooling. By following the steps outlined in this guide, you can ensure a successful installation process. Always prioritize safety, refer to the manufacturer’s instructions, and don’t hesitate to seek professional assistance if needed. 

Frequently Asked Questions

The VRV system is a multi-split type aircon designed for commercial buildings. It utilizes variable refrigerant flow control to enable precise zone control within each room and floor of a building. This technology allows customers to independently manage the climate settings of different zones, optimizing comfort and energy efficiency throughout the space.
Unlike traditional heating and cooling systems that rely on extensive ductwork to distribute air throughout a space, the VRV system is ductless.
The VRV system utilizes R-410A refrigerant, which enables the production of hot water at a thermal level of approximately 45°C.