Daikin FBQ20DAVMK Installation Manual

Also see for FBQ20DAVMK: Operation manual

Contents

10English6. REFRIGERANT PIPING WORK〈For refrigerant piping of outdoor units, see the installation manual attached to the outdoor unit.〉〈Execute heat insulation work completely on both sides of the gas piping and the liquid piping. Otherwise, awater leakage can result sometimes.〉(When using a heat pump, the temperature of the gas piping can reach up to approximately 120°C, so useinsulation which is sufficiently resistant.)〈Also, in cases where the temperature and humidity of the refrigerant piping sections might exceed 30°C orRH80%, reinforce the refrigerant insulation. (20mm or thicker) Condensate may form on the surface of theinsulating material.〉〈Be sure to check the type of R410A refrigerant to be used before doing any work. (Using an incorrectrefrigerant will prevent normal operation of the unit.)〉CAUTIONThis product is designed to be used with new refrigerant (R410A). Always observe the precautions on thefollowing when installing.• Use a pipe cutter and flare suitable for the type of refrigerant.• Apply ester oil or ether oil around the flare section before connecting.• Use the flare nut provided to the unit. Do not use a different flare nut (class 1), or otherwise refrigerantleakage may result.• To prevent dust, moisture or other foreign matter from infiltrating the tube, either pinch the end or coverit with tape.• Do not allow anything other than the designated refrigerant to get mixed into the refrigerant circuit, suchas air, etc. If any refrigerant gas leaks while working on the unit, ventilate the room thoroughly right away.• The outdoor unit is charged with refrigerant.• Be sure to use both a spanner and torque wrenchtogether, as shown in the drawing, when connectingor disconnecting pipes to/from the unit.(Refer to Fig. 6)• Refer to “Table 1” for the dimensions of flare nutspaces.• Use the flare nut included with the unit main body.• When connecting the flare nut, apply ester oil orether oil to the flare section (inside only), and spin3-4 times before screwing in.(Refer to Fig. 7)CAUTION• Do not let oil get on the screw holders on the dressing board. Oil can weaken the screw holders.• Refer to “Table 1” to determine the proper tightening torque.• Be careful not to damage the flare section.Torque wrenchSpannerPiping unionFlare nutFig. 6Fig. 7Coat here with ester or ether oil.01_EN_3PN06583-10W.fm Page 9 Thursday, March 24, 2011 9:03 AM