Daikin VKM50GMV1 Installation Manual

Contents

Daikin VKM50GMV1 Installation Manual Manual pdf 7 page image

English 5(4) Check the unit is horizontally level.CAUTIONUse a level to make sure that the unit is level and thatthe tilt (downward slope) to the drain piping connectionis within 1°. (Refer to Fig. 5)(One thing to watch out for in particular is if it is installed sothat the slope is not in the direction of the drain piping, asthis might cause leaking.)(5) Tighten the upper nut.(6) Attach the accessory duct connecting flanges usingthe included screws to the outlet and intake holes(a total of four).When attaching, make sure the alignment markings on theunit match up with the triangle on the each duct connectingflange. (Refer to Fig. 6)6 DRAIN PIPING AND WATER SUPPLYWORK(1) Install the drain piping.• Make sure the drain works properly.• In case of the direct duct connection system,there is negative pressure inside the unit relative to atmo-spheric pressure when the unit is running, so be sure toprovide drain frap on the drain outlet. (See Fig. 7-1)CAUTIONDo not connect the drain piping directly to sewage pipesthat smell of ammonia. The ammonia in the sewage mightenter the indoor unit through the drain pipes and corrodethe heat exchanger (Direct expantion coil).• Keep the drain pipe short and sloping downwards at agradient of at least 1/100 to prevent air pockets fromforming. (Refer to Fig. 7-2)• If converging multiple drain pipes, install according to theprocedure shown below. (Install a drain trap for eachindoor unit.)CAUTIONWater accumulating in the drain piping can cause thedrain to clog.• The diameter of the drain pipe should be greater than orequal to the diameter of the connecting pipe.(pipe size: PT3/4B)• When piping passes indoors, always insulate it all theway to the base of the drain socket.• In areas where freezing may occur, always take steps toprevent the pipes from freezing.• Make sure water doesn’t leak from the drain pipes.• Avoid bends and curves in the pipes to prevent themgetting clogged.• If you are using central drain piping, follow the procedureoutlined in the figure 7-2.• Select central drain pipes of proper size according to thecapacity of the connected unit.• Make sure the tip of the drain pipes opens out into a loca-tion where the drainage can be safely processed.(2) After piping work is finished, check drainage flowssmoothly.• Test the drainage by pouring around 1000cc of water intothe drain pan through the inspection hole by removing themaintenance cover (10 screws) or through the outlet ductjoint of supply air to room (SA). (Refer to Fig. 8)(3) Make sure that heat insulation work is executed on thefollowing 2 spots to prevent any possibility water leak-age due to dew condensation.• Indoor drain piping• Drain outletLevel LevelDrain holeHorizontal lineDrain hole Dact connectingflange1 0 or less 1 0 or lessFig. 5Fig. 6Duct connecting flange markingScrews (accessory)(6pcs.×4, total 24pcs.)(RA is a φ3 indentation)Duct connecting flangeDuct connectingflangeUnit alignmentAttached drain hoseBottom of unit50 mmor more50 mmor moreFig. 7-1100mmor moreFig. 7-2Central drain piping(Install with a downward slope of at least 1/100)Maintenance coverBucketPortable pump(Locally procured)(Figure shows VKM-GMV1)(Locally procured)(Locally procured)Duct connecting flangeSupply air to room (SA)(accessory)Drain piping Drain outletFig. 8