Daikin FXFQ-M Engineering Data

Daikin FXFQ-M Engineering Data Manual pdf 28 page image

EDUS39-600-F1_a InstallationFXFQ-M 27Ceiling work(2) Adjust the unit to the correct position for installation.(Refer to Section 4. (1) PREPARATIONS BEFOREINSTALLATION, P. 67.(3) Make sure the unit is horizontally level.• The indoor unit is equipped with a built-in drainpump and float switch. At each of the unit’s 4 cor-ners, verify that it is level by using a waterlevel or awater-filled vinyl tube.If the unit is inclined against condensate flow, thefloat switch may malfunction and cause water todrip.(4) Remove the washer-fixing plate (7) used for preventingthe washer from falling and tighten the upper nut.(5) Remove the paper pattern for installation (5).6-2 For existing ceilings(6) Adjust the height and position of the unit.Refer toPREPARATIONS BEFORE INSTALLATION-(1).(7) Perform steps (4), (5) in “6-1 For new ceilings”.7. REFRIGERANT PIPING WORK7-1 GENERAL INSTRUCTIONS• For refrigerant piping of outdoor units, see the installation man-ual attached to the outdoor unit.• Before refrigerant piping work, check which type of refriger-ant is used. Proper operation is not possible if the types ofrefrigerant are not the same.• The outdoor unit is charged with refrigerant.DANGER• Refrigerant gas may produce toxic gas if it comes in contactwith fire such as from a fan, heater, stove or cooking device.Exposure to this gas could result in severe injury or death.NOTE• Use a pipe cutter and flare suitable for the type of refriger-ant.• To prevent dust, moisture or other foreign matter from infiltrat-ing the tube, either pinch the end or cover it with tape.• Do not allow anything other than the designated refrigerant toget mixed into the refrigerant circuit, such as air. If any refrig-erant gas leaks while working on the unit, ventilate theroom immediately. .7-2 Connecting the refrigerant piping• When connecting the flare nut, coat the flare both insideand outside with ester oil or ether oil and initially tighten byhand 3 or 4 turns before tightening firmly.• To prevent flare nut cracking and gas leaks, be sure to useboth a spanner and torque wrench together, as shown in thedrawing below, when connecting or disconnecting pipes to/from the unit.Paper pattern forinstallation 5)Center of the unitCenter of ceiling openingCeiling materialLower surfaceof ceiling[Height adjustment of the unit.]Screws 6)(attached)[Installation of paper pattern for installation]Water levelVinyl tubeEster oil or ether oil.Torque wrenchSpannerPiping unionFlare nut