K S Services (UK) Ltd.

What is VRF?

Variable refrigerant flow (vrf) also known as variable refrigerant

This type of system consists of a number of air handling units (possibly up to 48) connected to a modular external condensing unit. The refrigerant flow is varied using either an inverter The refrigerant flow is varied using either an inverter
controlled variable speed compressor, or multiple compressors of varying capacity in response to changes in the cooling or heating requirement within the air conditioned space.

A sophisticated control system enables switching between the heating and cooling modes
In more sophisticated versions, the indoor units may operate in heating or cooling mode independently of others
This latter arrangement offers potential energy savings when heating and cooling are required simultaneously in different zones
This type of system requires no internal plant room space and offers great flexibility through the many types of air handling units available
Applications vary from office, retail, hotel, luxury apartments, industrial, new and retrofitted buildings


Mitsubishi VRF Air Conditioners

City Multi - Y and Super Y Series, cooling only and heat pump systems

Y and Super Y series units provide either heating or cooling, with the condensing units coming in a number of different sizes. 8,10, 16 and 20 horse power (23.3-52.3kW) for the Y Series and 24, 26, 28 and 30 horse power (69.8-87.3kW) for the Super Y. Up to 20 indoor units can be connect to the Y Series, and 32 to the Super Y, depending on the outdoor unit size.

R2 and WR2, simultaneous heating and cooling

The R2 system provides simultaneous heating and cooling, with the BC controller connecting several indoor units to one outdoor unit using only 2 pipes. With energy saving heat recovery operation, economy and efficiency are guaranteed. Outdoor units come in 8 and 10 horse power models, and up to 16 indoor units can be connected, depending on the model. The WR2 system introduces a water cooled condenser, making it suitable for an even wider range of applications. High COP’s are possible thanks to increased efficiency and careful control of the water circuit temperature.

Big R2 simultaneous heating and cooling

The industry's first VRF controller with web server functions
Can control up to 50 indoor units
Simple and flexible, suitable for small to large system with simple to complex function
Enable monitoring and operation of the air conditioning units using a PC with Internet Explorer
Allows users to remotely monitor and operate the air conditioning units using a PC connected to a telephone line.
In the case of a malfunction, necessary information will be sent to a PC via email.
Easy to upgrade with various new function being introduced gradually which can be easily down loaded into any existing
G50-a
Up to a maximum of 40 G50-A’s can be network together via the TG2000 front end software.
Benefits of the City Multi System include

Allows a rapid and economic design solution
Extensive equipment range to satisfy all applications
Ease of installation
Ease of maintenance
Maximise lettable floor space
Economic and flexible installation
Low running and maintenance costs
Year round comfort

Key features of City Multi

Available in a range of indoor unit styles, including, wall mounted, ceiling cassette, ceiling suspended, floor standing and ceiling concealed ducted
Indoor units cooling capacities from 2.3kW through to 14.5kW
R407C Refrigerant
Low indoor unit sound levels
Numerous control options available including, simplified, group controllers and PC
Can be controlled in conjunction with the P Series and Lossnay range of units
Interfaces to BMS systems available, including Trend and LonWorks
GUF freshmaster unit, heat recovery ahu with DX cooling and heating (500 and 1000m3/h)