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R22 replacement brings rewards.

A food wholesaler has ditched an unreliable R22 system for a VRV-based range that’s improving efficiencies and costs

Stonegrove Refrigeration Services has installed the Daikin Zeas refrigeration system for SeeWoo Foods as a replacement for an ageing R22 system using reciprocating compressors that had become unreliable and inefficient.

The Zeas range of VRV-based condensing units deliver high efficiency, low-cost operation and are particularly suited to refrigeration applications with constantly fluctuating loads, Daikin says. The inverter-controlled units are well-suited for use in supermarkets, cold stores, petrol station forecourts, restaurants and food processing rooms.

The SeeWoo Foods’ system, supplied by Climate Center, consists of three low-temperature units and one high-temperature unit, serving refrigerated food display cases in the store.

In addition to efficiency and reliability, the Daikin Zeas units were selected for their small footprint, due to the restricted space at the rear of the SeeWoo Foods’ Greenwich site in London.

SeeWoo Foods’ technical services manager Henry Pirie says: “We are delighted with the new system. It is extremely energy-efficient and already delivering significant savings compared with the previous system. We expect a payback in a short period of time.”

Mr Pirie is especially impressed with the low noise output, a feature that the Cooling Awards judges noted when they Highly Commended the Zeas for 2011 Refrigeration Product of the Year.

 He says: “It is exceptionally quiet. It can be difficult to know whether it is actually running unless you are very close to the unit. It has also performed impeccably since it was installed. As a result, I have reclaimed my weekends and bank holidays.”

The refrigeration plant switchover had to be carried out according to a tight timetable in order to minimise disruption to trading. The critical switchover took place on sections of cases between 7pm on a Monday night and store trading as normal at 9am the following Thursday morning over a four-week period.

Small wonder

Stonegrove Refrigeration Services managing director Ray Cashmore says: “The Zeas is a superb product – and from the contractor’s point of view a joy to install and commission. Because of the compactness of the system, the client was able to convert the previous plant room to productive use. It is now being used as a cold room for fish.”

SeeWoo is sufficiently impressed to now be considering installing further Daikin Zeas systems for other outlets in its network.

Based on DC inverter-driven scroll compressors, the Zeas system delivers a CoP of up to 3.0, a level of efficiency not obtainable with conventional non-inverter technology, Daikin says. Inverter control gives the twin benefit of reduced stop/start cycles, prolonging equipment life, and precise matching of cooling capacity to load, enabling low running costs.

The Zeas units are available for use in medium temperature (12.2 to 37 kW capacities) and low temperature applications (5.4 to 15.1 kW).

By using high capacity R410A, the systems are comparatively compact, enabling installation of large cooling capacities in areas with restricted space.

The packaged units are factory tested and housed in a weatherproof enclosure and come with pre-programmed controls for simple installation and commissioning

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