External Installation Options

Down-discharge coolers

The downards-discharge cooling unit is designed to mount on the top-external side of a roof and draws air downwards into the building underneath. Factors affecting such a choice will be:

• Ease of installation and maintenance
• Consideration of local noise production
• Weather-proofing of the roof
• Proximity to extraction fans (need to avoid re-circulation)
• Proximity to other vents or exhausts which may contain contaminated fumes.

The cooler must be supported by a 645mm square plain-edged duct with a minimum stand size of 250mm.

All types of roof membranes can support a downwards-discharge cooler but require an appropriate up-stand and weather-proofing.

Extract fans are installed to provide balanced ventilation. The Eco-Cooler control system automatically controls the function of the extract fan. A drain is required which usually exits onto the surrounding roof.

In this example, a down-discharge cooler "A" is mounted externally on the top of a flat roof and leads to an 8-way penum chamber "B" for air discharge. The Extraction fan "C" is also mounted on the roof and runs at 80 - 90% of the flow rate of the cooler. This ensures a positive internal pressure and this constant cooling effect in the building, where it is inevitable that doors and other apertures will be open.

Top Discharge Coolers

Top discharge coolers give you an alternative fitting solution where roof-top mounting is inappropriate (for example due to access or weather-proofing). Because the cooler itself must not carry any weight, all the mounting and ductwork must be completely self-supporting.

The duct can be finished in either 630mm round or square duct which can be attached to the top connection element (which is stainless steel).

Top discharge example installation method

In this Car Show-room example, a top discharge cooler unit "F" is externally mounted on the ground (for example because the dealership does not have access to the roof). In this example, air is ducted through the showroom using a Fabric Duct "G".

Side-discharge installation

Side discharge coolers can be mounted using simple brackets and are ideal for attaching to modern industrial metal-clad units. Because of the presumed horizontal space that is available to this sort of installation, the side-discharge unit lends itself well to having a sound-attenuator added.

Side discharge example installation method

In this example office installation, a roof-mounted option has been possible, but because of the need to eliminate noise, a side-discharge unit "J" has been chosen, as well as a sound-attenuator "K".

Other installation considerations

As well as ease of installation and maintenance, onsideration of local noise, weather-proofing, proximity to extraction fans and other vents mentioned above, the following additional considerations should be made when chossing an installation location:

• Generally, cooled air should be introduced as low as possiblre into a building.
• The operating nature of the building may require you to create positive air pressure inside it by ensuring your exit surface areas and air flow are less than your entry surface areas and airflow.
• Will you be using internal cooling systems as well? In this case your ventilation capacity must exceed the airflow rate of these internal coolers, otherwise you will be recirculating the air.
• Fabric ducts prevent draughts.
• Always consider movement of machinery or people when planning placement of cooler units and ducts.