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Examples of bad installation

Examples of bad installation. CONTENT. Installation related examples Application related examples. Installation related : Refrigerant pipe work. Mistake : Saw used instead of cutter Problem : Burrs can enter pipe and cause blockage inside the equipment

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Examples of bad installation

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  1. Examples of bad installation

  2. CONTENT • Installation related examples • Application related examples

  3. Installation related : Refrigerant pipe work • Mistake : • Saw used instead of cutter • Problem : • Burrs can enter pipe and cause blockage inside the equipment • Improper cutting causes flares to leak • Advise : • Use copper tube cutter

  4. Installation related : Refrigerant pipe work • Refrigerant pipe work • Close tubes during storage.Problem : • Moisture, dust, sand ect.. Can enter tube. • Mistake : • Pipes stored on the ground without seal plugs • Problem : • Moisture, dust, sand ect… can enter the pipe • Pipes can be crushed by stepping onto them • Advise : • Seal the pipes • Store pipes on a stand

  5. Installation related : Refrigerant pipe work • Mistake : • Dirt entered the unit during installation of field piping • Problem : • Filters gets blocked • Advise : • Take special care to avoid dirt entry • Follow vacuum procedure prescribed in installation manual

  6. Installation related : Refrigerant pipe work • Mistake : • Incorrectly positioned refnet • Problem : • Refrigerant noise • Unequal refrigerant distribution causes lack of capacity at some indoors • Advise : • Install refnet according to specification installation manual. OK OK

  7. Installation related : Refrigerant pipe work • Mistake : • Pipe not connected correctly to refnet • Problem : • Refrigerant noise • Unequal refrigerant distribution causes lack of capacity at some indoors • Advise : • Install refnet according to specification installation manual.

  8. Installation related : Drain pipe work • Mistake : • Too small drain pipe • Problem : • Water can not evacuate and drain switch activates • Water leakage can occur • Advise : • Use drain pipe size advised in installation manual

  9. Installation related : Drain pipe work • Mistake : • Drain trap installedwithout cleaning possibility • Problem : • Dust and rubbish accumulates in trap and blocks the pipe • Advise : • Don’t use drain trap • If inevitable, make it as indicated in picture

  10. Installation related : Drain pipe work • Mistake : • Too long distance between suspension points of drain pipe • Problem : • Pipe bends trough and water can not flow out • Advise : • Suspension distance should be 0,8 ~ 1 m • Slope should be 1/100

  11. Installation related : Drain pipe work • Mistake : • Too small pipe size in collective pipe • Problem : • Drain switch activated by water flow obstruction in too small pipe size. • Advise : • Use drain pipe with ID 30 mm or more for collective piping

  12. Installation related : Electrical wiring • Mistake : • Wire tightened over the insulation part • Problem : • Wire overheated • Over current safety activates • Advise : • Fix wires according to drawing on the left

  13. Installation related : Fixation

  14. Installation related : Wrong position of indoor unit FXLQ Floor mounted type It is not just a problem for condensate evacuation. The fan it is not made to work in this position. Risk of damage on medium term

  15. Installation related : Wrong position of indoor unit • Mistake : No free air suction • Problem : Refrigerant can not be evaporated causing capacity Shortage & compressor break-down • Advise : Provide enough room for free air suction

  16. No internal heat load, NORTH side = heating demand Application related : Installation lay-out NORTH • Mistake : • Indoor unit with different demand on one H/P system • Problem : • Too cold in meeting room • Advise : • Use heat-recovery or connect indoor meeting room to system with same operation mode request Meeting room Landscape office High internal heat load = cooling demand SOUTH HEATPUMP OUTDOOR

  17. Application related : Air distribution location grilles Air discharge grille Air suction grille • Mistake : • Wrong location suction/discharge grill • Problem : • Air short - circuit • Advise : • Install grills in the room in such a way to obtain a good air circulation Largest area no direct air circulation

  18. Application related : Air circulation OFFICE • Mistake : • Air suction side does not come from air-conditioned room • Problem : • Can not heat or cool the office enough • Advise : • Air suction should be done from room to be air-conditioned. Air outlet BASEMENT Air suction from basement at 16°C

  19. Application related : Air distribution Air outlet behind couch • Mistake : • Air short circuit • Problem : • Can not heat or cool the room properly • Advise : • Avoid obstruction at air outlet • Separate air outlet from air suction (e.g. suction at floor level, outlet at ceiling level) Air suction

  20. Application related : Air distribution • Mistake : • Ceiling not closed • Problem : • Heating capacity shortage because warm air goes via the gap into the false ceiling • Advise : • Use closed ceiling so that warm air can not escape to ceiling void Gap (open ceiling) Unit installed in panel

  21. Application related : Fresh air connection Branch duct connection • Mistake : • Fresh air connection to branch ductconnection of FXYF • Problem : • Discharge air unit can escape via fresh air ducting • Advise : • Use fresh air kit chamber , “KDDJ55G80-1” and duct-connection, “KDDJ55G80-2”

  22. Application related : Service space • Mistake : • Installation location outdoor create air - recirculation • Problem : • Outdoor temp is 27°C, but at inlet condensor VRV it is 40°C. • Efficiency & life time go down, unit can trip on HP safety • Advise : • Respect installation service space advised by Daikin

  23. Application related : Temperature control • Mistake : • Bad location remote sensor • Problem : • Unit stops although set temperature is not reached • Advise : • Never install remote sensor where discharge air can influence the sensor Remote air sensor influenced by discharge air unit COLD AIR

  24. Application related : Temperature control • Mistake : • No use of remote sensorfor unit with free suction • Problem : • Warm air (cooling) or cold air (heating) from the ceiling void influences the unit sensor • Bad temperature control • Advise : • Install remote sensor when using free suction DUCT UNIT : e.g. FXSQ80M7V1B Air false ceiling enters the unit 28°C Unit sensor Room air 18°C Setpoint 21°C cooling

  25. Application related : Temperature control Problem: Overheating of a small room where temperature control seems to not work. Why? • Indoor units are running in heating mode • 2. Same system airconditions rooms with different load or application. • Example: a perimetral landscape office requires heating while small interior meeting rooms require cooling or at least no heating. 3. The expansion valve is set to a bleeding openning between 150 and 240 pulses, in order to avoid accumulation of refrigerant and oil in the coil

  26. Application related : Temperature control Problem: Overheating of a small room where temperature control seems to not work. Countermeasure: • Install Remote sensor • Disable the Remote controller sensor • Enable the Heating optimization function of the Intelligent Touch Controller: the indoor unit fan is forced off at the thermostat off.

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