Vaillant VAI 6-025 WN Installation Manual

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8 VAI 6 WN-I_EN - 06/14 - Vaillant• Make the holes using a drill and insert the rawl plugs.• Place the mounting plate in position, level it horizontallyand fix it with the screws and the plugs.bWARNING!Danger of breakdowns or malfunction.• Ensure that the mounting plate has been cor-rectly levelled. Otherwise, disassemble theplate and assemble it again correctly. Failureto do so could lead to water leaks.9.3 Installation of the pipe work9.3.1 Correct removal of condensate watera DANGER!Danger of breakdowns or malfunction.Danger of condensed water leakage.• In order to ensure that the unit drains correctlytake the recommendations described in thissection into account.Methods for the removal of the condensed water which isgenerated in the indoor unit:- Condensed water can be allowed to drain naturally usingthe natural fall of the condensed water pipe to a suitabledrain point. In order for it to be aesthetically pleasing, usea solid pipework or trunking to cover the pipework.- Alternative hidden installation solutions also exist.- For example, using an external pump for removal of thecondensed water, carrying the condensed water to outsideor to main drainage system.- By natural fall to a collection point which is then emptiedusing a pump which operates when the tank is full,pumping the water to a suitable drain point.b WARNING!Danger of breakdowns or malfunction.Danger of condensed water leakage.• To ensure that the unit drains properly using anatural fall, the condensed water pipe musthave a an adequate fall from the indoor unit.9.3.2 Handling the refrigerant pipesa DANGER!Danger of burns and eye injuries.• When brazing pipe lines, use suitable protec-tion equipment (protective eye protection andmask, welding gloves, flame proof clothing).a WARNING!• Danger of breakdowns or malfunction. Dangerof damage to refrigerant pipes through the useof unsuitable materials.- Use only pipes specifically intended for refrigeration andR410A refrigerant.i NOTE!In specialised dealers you will find refrigerantpipes and the correct thermal insulation.- Ensure that the refrigerant pipes are clean, dry andpolished on the inside.- The insulation of the pipes should be done using specificclass ‘O’ insulation for cooling.- Observe the minimum and maximum pipe lengths foreach model.- Wherever possible avoid install excessive numbers ofbends in pipes. Do not over bend the pipe, keep theradius as wide as possible to minimise load losses.- When brazing pipes together, use only the correct brazingmaterials. During the brazing process a stream of oxygenfree nitrogen should be run through the inside of thepipes in order to avoid oxidisation forming inside the pipeconnection.- Only cut the coolant pipes using propriety pipe cutters,ensuring no swarf enters the pipe, and always keep thepipe ends sealed wherever possible to avoid moisturebeing allowed to enter the pipe.- Any flaring work should be performed meticulously inorder to create the correct connection and to avoidsubsequent gas leaks through the pipe connections.- When reaming the cut pipe keep the pipe openingdirected downwards in order to prevent shavings fromgetting into the pipes.- Mount the joining tubes carefully, ensuring they cannotbecome displaced during brazing. Ensure that there is nostrain on the pipe joints.- Ensure that all pipework is insulated with the correct gradeof closed cell insulation and that all joints in the insulationare sealed with insulation tape or glued.- Carefully tighten the flaring connectors, centring theflaring cone and the flanged nut. Applying excessive forcewithout correctly centring can damage the thread and mayallow water ingress into the connection.INSTALLATION