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APPLICATIONS


Remote Condensing units for cold rooms or retail display cabinets

The Marstair MRC+ and MRC+LT range of condensing units are ideally suited for cold room or retail display cabinet installations, with a wide range of units available for both medium and low temperature applications.

Remote condensing units for R22 replacements

Marstair has a large range of MCU+ condensing units available suitable for use with R407C. There are many systems still functioning on R22 refrigerant, however R22 refrigerant is no longer available for servicing this equipment. Many of these systems will need replacing due to their age but it is not always that simple. It is often very difficult to access the pipework on these old systems. R407C requires similar pipework so can be used to easily replace R22 condensing units whilst maintaining the existing pipework and evaporator if required.

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Remote condensing units for air handling units

Marstair has a wide range of condensing units available suitable for air handling unit applications. The MCU+ cool only and MHPUE heat pump condensing units specifications lend themselves to these applications and are easy to control.

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Heat Recovery condensing units

Marstair have a range of condensing units available MRCGH which make it easy to recover the heat generated from the refrigeration process into either hot water or directly into the air through our GreenHeat Cassette CC600MGH.

The MRCGH condensing unit has 2 extra pipe connections along with the usual suction and liquid lines. The discharge pipe off the compressor is split giving superheated discharge and de-superheated discharge pipe connections. There are also valves within the condensing unit allowing the heat to be diverted when required. If the heat is diverted, the de-superheated discharge then runs through the condensing coil as normal, but the fan speed control slows the fan to suit the required condensing temperature.

The Marstair CC600MHG GreenHeat cassette is specifically designed to recover heat from a refrigeration system with minimum resistance to the flow. The heat recovered from the refrigeration system reduces the heating required from an alternative system.

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Remote ducted condensing units for visually sensitive applications

Marstair ducted condensing units offer the ability to provide cooling in areas where the siting of an external condensing unit is not possible due to planning restrictions. The Marstair range includes condensing units for air-conditioning applications DCU+, as well as medium temperature refrigeration applications DRC+.



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Remote condensing units for Marine applications

Marstair offer a range of options for their MCU+ and MRC+ condensing units to create a bespoke solutions to suit your marine application.

Corrosion protection

Issues with corrosion can be one of the most common areas where the fitting of a more bespoke solution could ultimately save money by avoiding the requirement for a system to be regularly replaced.

Corrosion options include:-

  • Heat exchangers – Aluminium fins can corrode away rapidly reducing the effectiveness of the heat exchanger and copper corrosion can very quickly lead to the development of leaks. It is better to protect the heat exchangers before manufacture to ensure that it is protected in its entirety.

    - Copper tubes and Copper fins

    - Copper tubes and coated aluminium fins

    - Copper tubes and coated copper fins


  • Metal work – Galvanized or painted can rapidly corrode in some environments, especially marine.

    - Plastisol coated steel

    - 316 Stainless Steel is often specified in these environments.


IP protection

Different applications could require a higher level of ingress protection

- Fan motors IP44 or IP65

- Electrical enclosures IP44 or IP65

Electrical Options

Marine sites often have specific electrical supply and control requirements

- 1 phase

- 3 phase

- 3 phase no neutral

- 50 or 60Hz

- BMS run and alarm





Abnormal conditions

A wide range of options to suit more extreme environments

- R134A Refrigerant for an external ambient of up to 55°C

- Hot gas by pass valves and crankcase heaters for extreme cold environments

- Coil guards for sand or hail stones

- Wide fin pitches to prevent blocking

- Brackets and fan shields for high wind conditions

It is important to ensure you have the correct solution for your environment. Contact Marstair to produce a specification of condensing unit to suit your requirements.

Remote condensing units for high ambient conditions 55°C

For applications such as the Middle East, the external temperatures can reach as high as 55°C. Where these systems must be reliable and not switch off due to high refrigerant temperature/- pressure, R134A is an excellent solution due to the high allowable condensing temperatures. Marstair offers a range of condensing units suitable for use with R134A refrigerant, the MCU+ HA.

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Remote condensing units for potential explosive environments (ATEX)

Marstair offers a range of condensers MCUA suitable for use in EXII2G applications. These can be used in conjunction with Marstair compressor boxes MMC and the Marstair standard range of evaporators. These systems can be combined with the range of marine options and are ideally suited to the oil and gas industry.

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Beer Cellar cooling systems

Marstair have a wide range of options available for beer cellar cooling applications. For simple low cost applications, the CX(E)A R410A system offers the perfect solution with its stylish and easy to install evaporator. For more complex installations the CX(E) R407C systems have a multitude of options available, but with all the advantages of the CX(E)A R410A evaporator.

The CX(E) options include:-

  • Electronic control
  • Long pipe runs (up to 80m)
  • Ducted condensing units
  • Multi split systems

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WINE CELLAR COOLING

Many retail or domestic wine cellar applications require air-conditioning down to 10°C with low noise levels and aesthetic design to suit the location. This often makes standard refrigeration or cellar cooling equipment unsuitable. Marstair has a wide range of split low temperature air-conditioning systems available to suit even the most demanding of clients.

Evaporator options include:-

High Wall mounted WM units

Horizontal concealed ducted DXD units

Cassettes 600 & 875

Wall and ceiling chassis units DXT

Wall and ceiling cased units DXT

Condensing unit options include-

Fully dressed remote MCU+

Ducted DCU+

Food preparation areas

Food preparation areas require cooling down to 10°C in order to keep the food fresher for longer. However standard refrigeration or cellar cooling systems are often too noisy and create large drafts making the working environment uncomfortable. Marstair has a range of cassettes suitable for these applications the 600 and 875. These cassettes can either be offered as a full system matched with Marstair standard range for condensing units MCU+ or combined with existing refrigeration pack applications.

Cassettes 600 & 875

Low temperature air conditioning

There are many applications where standard air-conditioning systems cannot cool to a low enough temperature and refrigeration systems are not suitable due to noise or aesthetic design.

These may include:

  • Flower storage
  • Zoological applications
  • Mortuaries
  • Chocolate rooms
  • Marstair has a wide range of split low temperature air-conditioning systems available to suit these specialist environments.

Evaporator options include:-

High Wall mounted WM units

Horizontal concealed ducted DXD units

Cassettes 600 & 875

Wall and ceiling chassis units DXT

Wall and ceiling cased units DXT

Condensing unit options include-

Fully dressed remote MCU+

Ducted DCU+



Storage rooms requiring close control

Marstair offer an extensive range of small close control systems (4-20kW) CD3. These flexible systems are extensively used for storage room applications requiring close temperature and humidity control.

These applications include:-

  • Archive Rooms (Books and documents for libraries etc.)
  • Material Storage (Plastic materials prior to processing etc.)
  • High priced collectable products (Antique cars, paintings, musical instruments etc.)

These systems are configurable and are available with a range of options which include:-

  • Upflow or Downflow
  • Grille or ducted discharge and inlet airflows
  • DX split system or chilled water
  • Various filtration specifications
  • BACnet interface
  • Alarm options
  • Master Slave and auto change over

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Individual air-conditioning evaporators for easy matching

Marstair evaporators are available with electrics which are easily controlled externally making them an excellent choice for installations with remote packs or other condensing unit systems. The evaporator information includes published duty tables for evaporating temperature against air inlet temperature, making it easy to be confident the evaporator is correctly sized for the application.

CO2 evaporators for air-conditioning

CO2 for refrigeration is becoming very prominent in the supermarket sector. However the air-conditioning is often separate. Marstair has a range of CO2 evaporators suitable for air conditioning applications. Utilising the Marstair CO2 evaporators allows the entire air-conditioning and refrigeration system to run off a single pack, giving economies of scale. The evaporators also have the option of LPHW coils giving the opportunity of recovering the heat from the refrigeration system into the store, drastically reducing or even totally removing the need for a separate heating system.

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