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Individual air conditioning based on water source heat pump technology.
Colt-Caloris consists of three main components:
1) Indoor heat pump units positioned adjacent to each internal space,
2) A central outdoor heat pump, with the option of a connection to a ground source heat pump ,
3) A means of distributing the energy between the heat pumps in the form of a flow and return water system.
Caloris combines all the advantages of VRF and heat pump technologies, with a safe, highly efficient water based system. Colt-Caloris water source heat pump system is an ideal alternative to both conventional air conditioning and reverse cycle heat pump systems.
Its revolutionary design offers de-centralised local control, and its indoor units are amongst the quietest and slimmest horizontal units available.
Caloris is light on both installation and running costs. Its flow and return water system means that there is an unlimited number of units, unlimited length of pipework, and unlimited duty. And since the system has so little refrigerant charge, it is unaffected by the F-Gas regulations.
Caloris is a typical example of a WRF ® (Water and Refrigerant Flow) application.
Designed with simplicity of installation in mind, and with extremely low noise output, Caloris water source heat pump system is suited for installation into:
- Offices
- Sports and leisure facilities
- Residential buildings
- Retail buildings
- Hotels
- Schools
The Colt package
- System design
- Manufacture
- Project management
- Installation
- Commissioning
- Servicing
Energy saving and kind to the environment
The performance of Caloris is as good as if not better than existing systems. Depending on the ambient temperature, Caloris Indoor Units have a EER of between 3.7 and 6.4 and an Outdoor Unit has a EER of between 3 to 5 in winter and 4 to 5 in summer.
Heat reclaim
Caloris can make use of the building mass or a water reservoir (e.g. via a GSHP system) as a heat sink for both heating and cooling, thus achieves added efficiency. The water source heat pump units are also configured so that one can provide energy to another.
Central outdoor heat pump
This heat pump has the role of adding energy to or removing energy from the system, in order to maintain the temperature of the water system. However, since this system has significant thermal inertia, this heat pump is generally seldom in operation.
Decentralised control
Caloris provides fully independent local climate control of each internal space.
Controls options
Either analogue or digital controls are available, with the facility to connect to a Building Management System through to a CalorisNet modbus system via the digital controllers. A simplified digital "hotel room" controller is also available.
Low noise
Special attention has been paid to the design of the Caloris Indoor Unit to ensure that it is one of the quietest units on the market. The unit has a noise output of between NR 28 and 38. All sound data has been verified following extensive testing in third party laboratories.
Slim design
The indoor horizontal heat pump (sizes 1 to 4) measures just 247mm deep. The size 7 heat pump measures 339mm deep. It is amongst the slimmest on the market and is designed to easily fit within most ceiling voids. The indoor vertical heat pump is less than 500mm high and is thus suited to fitting under windows.
Flow and return water system
Caloris water source heat pumps are connected by a flow and return water system. Since the water temperature is neutral, pipework is uninsulated. An additional benefit of this is that when the pipework is placed in contact with the building structure, the consequent increase in thermal inertia of the system leads to yet higher efficiencies.
The pipework is usually polyethylene, instead of the traditional insulated pipework, and is connected with standard screw fit compression fittings, which reduces installation costs. There is no restriction on pipework lengths, and as a water based system there is no need to pump refrigerant around the building.
F-Gas Regulations
The F-Gas Regulations require the registration and competency of refrigerant installers, and annual on-site post installation joint testing of systems with more than 3 kg of HFC refrigerant. All Colt-Caloris units contain less than 3 kg, and as a result Colt-Caloris will be unaffected by the F-Gas regulations.
Click here (1.1 MB PDF) for an article on how WRF systems can help beat the regulations (reproduced with permission from the Building Services Journal).
Reliability
Caloris indoor units are manufactured by Colt in the UK. All components are available as standard and have proven reliability. Every unit undergoes a complete functional test in the factory. Colt has created new routines in its Havant factory in order to strive ever nearer to zero defects. If in the unlikely instance that one Indoor Unit should fail, the rest of the system can continue to operate, since each unit is self contained.
Ground sourcing
Colt-Caloris Indoor Units may be connected to a Ground Source Heat Pump (GSHP) system. Read more about Caloris and ground source heat pump systems.
Comparisons
For a simple comparison between four pipe fan coils, VRF and WRF systems, click here.
For a simple comparison between water-cooled VRF and WRF systems, click here.
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