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It is imperative that refrigerants are not mixed. A label is fixed to each compressor, which identifies the refrigerant being used within the unit, and that refrigerant ONLY should be used in the dryer. R134a & R407C are ozone benign refrigerants and meet the requirements of the revised “Montreal Protocol”. These refrigerants require the use of ESTER oil within the system and not MINERAL oil as used with R22 systems, and therefore again these oils must NOT be mixed. Introduction The Denco C series of Compressed Air Dryers are used to remove entrained moisture from compressed air supply systems and thus protect the various components and are designed such that routine maintenance is kept to a minimum. Most parts are field replaceable but should major maintenance or repair be required please refer to Denco Limited or an authorised distributor. NOTE: This manual applies ONLY to the C series of Compressed Air Dryers. For actual model refer to serial plate fitted to the unit. For other ranges refer to the respective manuals. Warning These Dryers are only designed for use with compressed air at or below the design maximum pressure (see Technical Data sheet(s) for maximum working pressures applicable). These Dryers must NOT be used for drying any other gases or fluids at other pressures. Operation of these Dryers using compressed air of a greater temperature than that specified will cause excessively high pressures in the refrigeration system, which may be dangerous. The air supplied to the dryer must be free of any corrosive or combustible gases or impurities. Warranty The warranty will only be considered valid if the equipment supplied is installed, commissioned and maintained in accordance with the instructions issued by Denco Limited. Furthermore the Company will not accept any liability whatsoever should the Dryer be installed incorrectly or operated outside its stated design duties and operating conditions or improper use be made of the equipment. Health and Safety Due regard shall be given to observing safe procedures when working with or on the equipment. It is the responsibility of the Installer / Operator / Customer to ensure that the “Health and Safety at Work Act (1974)” and Normal Safe Working Procedures are adhered to at all times. With reference to the "Control of Substances Hazardous to Health Regulations 1988 (COSHH)” the following paragraphs have been extracted from Denco’s letter responding to information requested “However, certain substances contained within materials used in the manufacture of our units could be hazardous when released, if the unit is misused, abused or maintained by unskilled labour. Fumes would be released if pipework or slab foam insulation (Armaflex or similar), electrical insulation or vinyl coatings were exposed to naked flame. It will be, therefore, that no naked flame should be applied to any of the above mentioned substances, nor to print, rubber or plastic parts. Light oil is applied to some bare metal parts as a protective coating and this could cause dermatic reaction to sensitive skin. Refrigerants contain hydrofluorocarbons (HFC’s). Glycol/water mix is used during manufacture but drained before delivery. The quantities in use are minimal but care should be taken in disposal. We trust that this information is sufficient but should you require further information regarding our products or maintenance service, please contact our sales department.” Machine Card In order to comply with BS EN 378-2:2000 “Refrigeration Systems and Heat Pumps – Safety and Environmental Requirements”, an adequately protected card shall be situated near the operating site and must be clearly readable. The card shall at least contain the following information: 1) Name, address and telephone number of the installer, his service department, or the person responsible for the refrigeration and the addresse...
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