Daikin CMSQ200A7W1B Installation Manual

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Daikin CMSQ200A7W1B Installation Manual Manual pdf 8 page image

Installation manual4 CMSQ200+250A7W1BAir conditioning system4PW47543-1■ Fasten the unit in place using fourfoundation bolts M12. It is best to screw inthe foundation bolts until their lengthremains 20 mm above the foundationsurface.6. REFRIGERANT PIPING6.1. Installation toolsMake sure to use installation tools (gauge manifold charge hose,etc.) that are exclusively used for R410A installations to withstand thepressure and to prevent foreign materials (e.g. mineral oils such asSUNISO and moisture) from mixing into the system.(The screw specifications differ for R410A and R407C.)Use a 2-stage vacuum pump with a non-return valve which canevacuate to –100.7 kPa (5 Torr, –755 mm Hg).6.2. Selection of piping material1. Foreign materials inside pipes (including oils for fabrication)must be 30 mg/10 m or less.2. Use the following material specification for refrigerant piping:■ Size: determine the proper size referring to chapter"6.6. Example of connection" on page 7.■ Construction material: phosphoric acid deoxidized seamlesscopper for refrigerant.■ Temper grade: use piping with temper grade in function of thepipe diameter as listed in the table below.■ The pipe thickness of the refrigerant piping should complywith relevant local and national regulations. The minimal pipethickness for R410A piping must be in accordance with thetable below.3. Make sure to use the particular branches of piping that havebeen selected referring to chapter "6.6. Example of connection"on page 7.4. In case the required pipe sizes (inch sizes) are not available, it isalso allowed to use other diameters (mm sizes), taken thefollowing into account:■ select the pipe size nearest to the required size.■ use the suitable adapters for the change-over from inch tomm pipes (field supply).5. Precautions when selecting branch pipingWhen the equivalent pipe length between outdoor and indoorunits is 90 m or more, the size of the main pipes (both gas sideand liquid side) must be increased.Depending on the length of the piping, the capacity may drop,but even in such a case it is possible to increase the size of themain pipes. Refer to page 8. If the recommended pipe size is notavailable, stick to the original pipe diameter (which may result ina small capacity decrease).■ Prepare a water drainage channel around thefoundation to drain waste water from around the unit.■ If the unit is to be installed on a roof, check thestrength of the roof and its drainage facilities first.■ If the unit is to be installed on a frame, install thewaterproofing board within a distance of 150 mmunder the unit in order to prevent infiltration of watercoming from under the unit.■ When installed in a corrosiveenvironment, use a nut withplastic washer (1) to protect thenut tightening part from rust.Do not insert fingers, rods or other objects into the airinlet or outlet. When the fan is rotating at high speed, itwill cause injury.Use R410A to add refrigerant.All field piping must be installed by a licensed refrigerationtechnician and must comply with relevant local andnational regulations.Caution to be taken when brazing refrigerant pipingDo not use flux when brazing copper-to-copper refrigerantpiping. (Particularly for the HFC refrigerant piping)Therefore, use the phosphor copper brazing filler metal(BCuP) which does not require flux.Flux has extremely harmful influence on refrigerant pipingsystems. For instance, if the chlorine based flux is used, itwill cause pipe corrosion or, in particular, if the fluxcontains fluorine, it will damage the refrigerant oil.Be sure to perform a nitrogen blow when brazing. Brazingwithout performing nitrogen replacement or releasingnitrogen into the piping will create large quantities ofoxidized film on the inside of the pipes, adversely affectingvalves and compressors in the refrigerating system andpreventing normal operation.After completing the installation work, check that therefrigerant gas does not leak.Toxic gas may be produced if the refrigerant gas leaks intothe room and comes in contact with a source of fire.Ventilate the area immediately in the event of a leak.In the event of a leak, do not touch the leaked refrigerantdirectly. Frostbite may be caused.20 mm1NOTE Make sure the pump oil does not flow oppositely intothe system while the pump is not working.Pipe Ø Temper grade of piping material≤15.9 O≥19.1 1/2HO = Annealed1/2H = Half hardPipe ØMinimal thicknesst (mm) Pipe ØMinimal thicknesst (mm)6.4 0.80 22.2 0.809.5 0.80 28.6 0.9912.7 0.80 34.9 1.2115.9 0.99 41.3 1.4319.1 0.80