Cooling Only VRF System

Outdoor units, also called VRF condensing units, come in modules that can be combined for higher capacities in large commercial VRF cooling systems.

Inverter compressors deliver precise capacity control and high part-load efficiency.

EEVs in each indoor unit fine-tune refrigerant flow for accurate zone temperatures.

Refnet joints and headers split the VRF branch piping evenly to multiple indoor units.

Cassette, ducted, hi wall, ceiling suspended, and floor standing indoor units suit every room type.

Room controllers, central controllers, and BMS gateways provide local and central control.

VRF hi wall indoor units suit bedrooms, cabins, and small offices.

VRF cassette indoor units fit in false ceilings. 4-way units suit open offices, while 2-way and 1-way units suit corridors and narrow rooms. Round flow units give 360-degree air distribution. A cooling only VRF cassette is one of the most popular choices for commercial spaces.

VRF ducted indoor units and VRF ceiling concealed units are fully hidden, with only grilles visible. A cooling only VRF ducted unit is ideal for premium interiors.

These units hang below the ceiling and suit large rooms, restaurants, and spaces without a false ceiling.

These suit perimeter zones, glazed walls, and rooms without false ceilings.

These dedicated units cool and dehumidify 100% outdoor air before supplying it to the space. For larger airflow, a cooling only VRF with AHU, using a VRF AHU integration kit, is also possible.

Top discharge VRF outdoor units are the standard for commercial projects. They are combined in modules for large capacities and installed on terraces or service floors, making them ideal for a high capacity VRF system.

Side discharge VRF outdoor units are compact and can be placed on balconies or ledges. A mini VRF cooling only system is ideal for villas, apartments, and small offices looking for a VRF AC for home or small commercial spaces.

High ambient VRF cooling units are designed to operate reliably in extreme Indian summers, with some models rated for outdoor temperatures above 50°C.

A detailed VRF cooling load calculation for every room forms the base of cooling only VRF system design. Rooms are grouped into zones based on usage, orientation, and operating hours.

Outdoor capacity is selected in HP based on the peak building load, applying a suitable VRF diversity factor.

The VRF combination ratio is kept within the manufacturer's allowed range, often between 50% and 130%, balancing cost, comfort, and efficiency.

VRF pipe sizing and routing must stay within the manufacturer's limits for total length, farthest unit, and height difference, to maintain capacity and oil return.

Room volumes are checked against the refrigerant charge to ensure safety in case of leaks.

Outdoor unit capacity drops at very high outdoor temperatures. We select units and apply correction factors so the system delivers the required VRF cooling capacity on the hottest days.

Inverter compressors match output to demand, avoiding the energy waste of on/off cycling.

Buildings run at part load most of the time. VRF part load efficiency is where the biggest savings come from.

EER measures efficiency at full load, while IEER reflects efficiency across part-load conditions. An energy efficient cooling only VRF offers high ratings in both.

Most systems use R410A, and R410A cooling only VRF is widely available. R32 VRF options are also emerging, offering lower global warming potential.

Indoor units offer dry mode, which runs the coil at lower airflow to remove more moisture during mild, humid weather.

In cities like Mumbai, correct indoor unit sizing, avoiding oversizing, and adequate coil temperatures help maintain comfortable indoor humidity.

Humid outdoor air is the biggest source of indoor moisture. Pre-treating fresh air through a VRF treated fresh air unit or DOAS keeps indoor humidity under control.

Each room controller lets occupants set temperature, fan speed, and mode for true VRF zone control.

Central controllers allow facility teams to monitor all indoor units, set schedules, and lock settings.

A cooling only VRF with BMS integration connects through VRF BACnet or VRF Modbus gateways.

Remote platforms provide alerts, monitoring, and control from anywhere.

In multi-tenant buildings, energy use is apportioned to each tenant for accurate billing.

Schedules and setback temperatures prevent unnecessary cooling after hours and in unoccupied rooms.

These units cool and dehumidify outdoor air before supplying it to rooms.

HRVs and ERVs pre-cool incoming fresh air using exhaust air. ERVs also reduce the moisture brought in with fresh air, which is especially useful in humid climates.

A DOAS handles all fresh air separately, allowing the VRF system to focus on room cooling.

Without heating components, cooling only VRF offers lower equipment and installation costs.

Designed for cooling-dominant regions, it matches the needs of most Indian cities.

Each room or zone has its own temperature setting, making it a true multi zone VRF cooling system.

Inverter technology delivers excellent efficiency when the building is partly occupied.

Air cooled VRF needs no plant room, pumps, or cooling towers.

Modular outdoor units take far less space than a central plant.

Zones and floors can be added in phases as the building is occupied.

Cooling only VRF cannot provide heating. For colder regions, heat pump or heat recovery VRF is required.

Piping lengths and height differences must stay within manufacturer limits.

Leak prevention, detection, and refrigerant concentration checks are important.

VRF costs more upfront than individual split ACs, though it offers better efficiency, control, and aesthetics.

Fresh air must be planned through fresh air units, ERVs, or DOAS.

Brazing, pressure testing, vacuuming, and charging must be done precisely by trained technicians.

Compress India plans and executes every cooling only VRF project to manage these limitations effectively.

A cooling only VRF for offices provides cabin-wise and floor-wise control with tenant billing and BMS integration.

A cooling only VRF for shopping mall tenants and showrooms offers flexible zoning and clean interiors.

Multiple indoor units handle dining and private areas with different cooling loads.

A cooling only VRF for hotels delivers quiet, individually controlled cooling with central monitoring.

VRF provides zone control for consultation rooms, wards, and offices, with fresh air planned separately.

VRF delivers reliable, quiet cooling for customer areas, cabins, and server rooms.

Scheduled cooling for classrooms and offices keeps energy use in check.

A mini VRF gives homes concealed, room-wise cooling from one compact outdoor unit. It is also a practical cooling only VRF for high rise buildings where many split outdoor units are not allowed.

Daikin originated the VRV concept, and Daikin VRV systems are widely used in Indian commercial and residential projects.

The Mitsubishi Electric VRF system range offers a wide choice of outdoor and indoor units for commercial buildings.

Hitachi VRF systems offer modular outdoor units for commercial applications.

Toshiba VRF systems are known for modular designs and efficient operation.

The LG VRF system, sold as Multi V, offers solutions for commercial and residential use.

Samsung VRF AC systems under the DVM range offer modular outdoor units and flexible indoor options.

Blue Star VRF systems are offered by one of India's well-known HVAC brands.

Voltas VRF systems are part of the brand's central air conditioning range.

Carrier VRF systems are available for commercial cooling applications.

Filters are cleaned regularly and coils are cleaned periodically to maintain airflow and cooling.

Outdoor coils are cleaned to maintain heat rejection, which is especially important in dusty and coastal areas.

Joints and connections are checked for leaks to maintain refrigerant charge and efficiency.

Error codes are read and analysed to identify faults quickly.

Compressor current, pressures, and PCB condition are checked to catch problems early.

• Comprehensive AMC: Covers scheduled maintenance plus specified spare parts, with predictable annual costs.
• Non-Comprehensive AMC: Covers scheduled maintenance and service visits, with spare parts charged separately.

Causes: EEV faults, low refrigerant, piping issues, or addressing errors.

Solution: Check EEVs, charge, piping, and addressing, and correct faults.

Causes: poor brazing, vibration, or damaged pipes.

Solution: Locate and repair leaks, pressure test, vacuum, and recharge.

Causes: loose or damaged wiring, or addressing errors.

Solution: Inspect wiring and re-address units.

Causes: sensor faults, PCB issues, or operating limits being exceeded.

Solution: Diagnose using the error code and replace faulty parts.

Causes: dirty coils, hot air recirculation, or poor ventilation.

Solution: Clean coils, improve clearances, and prevent recirculation.

Causes: blocked drains, drain pump failure, or poor slope.

Solution: Clean drains, repair pumps, and correct slopes.

Causes: oversized indoor units, untreated fresh air, or high coil temperatures.

Solution: Review sizing, add fresh air pre-treatment, and adjust settings.

Buildings with many split ACs can switch to a cooling only VRF system, reducing outdoor units, improving aesthetics, and lowering energy use.

Old R22 systems can be replaced with modern, efficient VRF systems. In some cases, existing piping can be reused after inspection and cleaning.

Additional indoor units can be connected within the outdoor unit's connection ratio and piping limits.

Upgraded controllers and BMS gateways improve monitoring, scheduling, and energy management.

VRF systems are commonly priced per HP of outdoor capacity. Cooling only systems are generally more economical per HP than heat pump or heat recovery systems.

Indoor unit cost depends on type and capacity. Cassette and ducted units generally cost more than hi wall units.

Refrigerant piping, refnet joints, insulation, drain piping, ductwork, controllers, and BMS integration form a significant part of the total cost.

Building size, number of zones, indoor unit mix, piping lengths, fresh air system, controls, and site conditions all affect the final VRF AC system price.

Share your floor plans with Compress India to receive an accurate cooling only VRF quotation.