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Category: Colt International Water Source heat pumps UK Colt-Caloris Caloris air conditioning heat pumps

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Colt International Ltd
Water Source Heat Pumps

Water-Source Air Conditioning Systems (WRF)

Colt International Ltd designs and manufactures water source heat pump systems. These are designed to provide minimal environmental impact, as well as to meet the requirements of the F-Gas Regulations.

Caloris water and refrigerant flow (WRF) is a technology that provides an ideal alternative to both conventional air conditioning and reverse cycle heat pump systems. It provides the advantages of efficiency, safety and flexibility that are provided by water-based climate control.

Water-Source Heat Pump Systems

Caloris WRF systems are based on a decentralised, locally controlled arrangement of quiet, slim, indoor heat pump units. Simple to install, economical to run, and low in noise output, these systems are especially suitable for use in offices, sports and leisure facilities, residential buildings, retail buildings, hotels and schools.

Control Systems

Caloris WRF systems employ a decentralised control system, which enables the close and individual control of the internal space. Controls are available in either analogue or digital versions, and these may be connected to a building management system.

Operation

Caloris WRF systems can comprise three main components: Indoor heat pump units for each controlled area; an external energy source (e.g. a central air to water heat pump or ground source etc); and a neutral water loop, which provides the means of distributing energy between the water-based heat pumps.

Caloris systems can use both the building mass or a water reservoir (when connected to a ground source heat pump) as a heat sink for both heating and cooling purposes, and this provides additional efficiency. The systems are so designed that if one of the indoor units in a series should fail, the rest continue to operate.

Composition & Manufacture

Caloris WRF indoor heat pump units are manufactured by Colt International in the UK. Every unit produced undergoes a complete functional test. New routines have been developed in the company’s Havant factory with the aim of achieving zero-defect production processes.

Dimensions

Horizontal indoor heat pumps measure 247mm in depth, or 339mm in depth in the case of size 7 version. This makes them amongst the slimmest available, and allows them to be installed within most ceiling voids. Vertical indoor heat pumps measure less than 500mm in height, which enables them to be installed directly under windows.

Technical Data

Caloris WRF systems provide excellent performance. Depending on water temperatures, indoor units have an energy efficiency rating (EER) of 3.7-6.4. Outdoor units have CoP’s of between 3-5 and EER’s of 4-5 (= an SPF of 30-40).

Caloris WRF systems are also amongst the quietest available, with indoor units producing a noise output of NR28-NR38. All Caloris WRF indoor units contain less than 3kg of HFC refrigerant and as a result are unaffected by the F-Gas Regulations.

Installation

Indoor Heat pump units are connected by a two-pipe water loop. Cross linked polyethylene pipework reduces installation time and costs. There is no limit to the lengths of pipe-work because, as a water-based technology, Caloris WRF systems do not have to pump refrigerants around a building.

Technical Support

Colt provides a comprehensive support service, including system design, manufacture, project management, installation, commissioning and maintenance.

Further information can be found on our Technical Page - see link below.

Technical information associated with:
Colt  - Water Source Heat Pump Guidance

System Diagram

Left: Floor Wall Unit
Right: Technocircle, Heerlen, Holland

Ceiling Void Indoor Units Available From 1kW up to 7kW

Email this company

Colt International Limited
New Lane
Havant
Hampshire
PO9 2LY

Tel : +44(0)23 9245 1111
Fax : +44(0)23 9245 4220
Email : info@coltgroup.com