Daikin FFQ25C2VEB Installation Manual

Also see for FFQ25C2VEB: Operation manual

Contents

Daikin FFQ25C2VEB Installation Manual Manual pdf 8 page image

Installation manual5 FFQ25~60C2VEBSplit System air conditioners4P341094-1B – 2013.04Cautions for brazing Be sure to carry out a nitrogen blow when brazing.Brazing without carrying out nitrogen replacement or releasingnitrogen into the piping will create large quantities of oxidizedfilm on the inside of the pipes, adversely affecting valves andcompressors in the refrigerating system and preventing normaloperation. When brazing while inserting nitrogen into the piping, nitrogenmust be set to 0.02 MPa with a pressure-reducing valve (=justenough so that it can be felt on the skin).Drain piping workInstallation of drain pipingInstall the drain piping as shown in the figure and take measuresagainst condensation. Improperly rigged piping could lead to leaksand eventually wet furniture and belongings. Install the drain pipes.- Keep piping as short as possible and slope it downwards at agradient of at least 1/100 so that air may not remain trappedinside the pipe.- Keep pipe size equal to or greater than that of the connectingpipe (vinyl pipe of 20 mm nominal diameter and 26 mm outerdiameter).- Push the supplied drain hose as far as possible over thedrain socket.- Tighten the metal clamp as indicated in the illustration.- After the testing of drain piping is finished, attach the drainsealing pad (4) supplied with the unit over the uncovered partof the drain socket (= between drain hose and unit body).- Wrap the supplied large sealing pad over the metal clampand drain hose to insulate and fix it with clamps.- Insulate the complete drain piping inside the building (fieldsupply).- If the drain hose cannot be sufficiently set on a slope, fit thehose with drain raising piping (field supply). How to perform piping (See figure 6)- Connect the drain hose to the drain raising pipes, andinsulate them.- Connect the drain hose to the drain outlet on the indoor unit,and tighten it with the clamp. Precautions- Install the drain raising pipes at a height of less than H2.- Install the drain raising pipes at a right angle to the indoorunit and no more than 300 mm from the unit.- To prevent air bubbles, install the drain hose level or slightlytilted up (≤75 mm).- Drain pump mounted in this unit is high lift type.Characteristic of this pump is that the higher pump is thelower drainage sound becomes. Therefore drain pump heightof 300mm is recommended.1 Refrigerant piping2 Part to be brazed3 Taping4 Hands valve5 Pressure-reducing valve6 Nitrogen1 Hanging bar1 Drain socket (attached to the unit)2 Drain hose (supplied with the unit)1 2 3 4 566211 Drain socket (attached to the unit)2 Drain hose (supplied with the unit)3 Metal clamp (supplied with the unit)NOTE: Bend the tip of the metal clamp without tearingthe sealing.4 Large sealing pad (supplied with the unit)5 Drain piping (field supply)1 Ceiling slab2 Hanger bracket3 Adjustable range4 Drain raising pipe (nominal diameter of vinyl pipe = 25 mm)5 Drain hose (supplied with the unit)6 Metal clamp (supplied with the unit)Decoration panel H2BYFQ60C 645 mmBYFQ60B 630 mmNOTE The incline of attached drain hose should be75 mm or less so that the drain socket doesnot have to withstand additional force.To ensure a downward slope of 1:100, installhanging bars every 1 to 1.5 m.When unifying multiple drain pipes, install thepipes as shown in figure 8. Select convergingdrain pipes whose gauge is suitable for theoperating capacity of the unit.1 T-joint converging drain pipes1523 4342AA'A-A'1