Learning, our way Examples of bad installation. CONTENT Installation related examples Installation...
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Transcript of Learning, our way Examples of bad installation. CONTENT Installation related examples Installation...
D a i k i n E u r o p e A c a d e m y
Learning, our way
Examples of bad Examples of bad installationinstallation
CONTENTCONTENT
• Installation related examplesInstallation related examples
• Application related examplesApplication related examples
Installation related : Refrigerant pipe Installation related : Refrigerant pipe workwork
• Mistake :Mistake :– Saw used instead of Saw used instead of
cuttercutter
• Problem :Problem :– Burrs can enter pipe Burrs can enter pipe
and cause blockage and cause blockage inside the equipmentinside the equipment
– Improper cutting causes Improper cutting causes flares to leakflares to leak
• Advise :Advise :– Use copper tube cutterUse copper tube cutter
Installation related : Refrigerant pipe Installation related : Refrigerant pipe workwork
• Refrigerant pipe workRefrigerant pipe work
– Close tubes during Close tubes during storage.storage.
Problem :Problem :– Moisture, dust, sand Moisture, dust, sand
ect.. Can enter tube.ect.. Can enter tube.
• Mistake :Mistake :– Pipes stored on the Pipes stored on the
ground without seal ground without seal plugsplugs
• Problem :Problem :– Moisture, dust, sand Moisture, dust, sand
ect… can enter the pipeect… can enter the pipe– Pipes can be crushed by Pipes can be crushed by
stepping onto themstepping onto them
• Advise :Advise :– Seal the pipesSeal the pipes– Store pipes on a standStore pipes on a stand
Installation related : Refrigerant pipe workInstallation related : Refrigerant pipe work
• Mistake :Mistake :– Dirt entered the unit Dirt entered the unit
during installation of field during installation of field pipingpiping
• Problem :Problem :– Filters gets blockedFilters gets blocked
• Advise :Advise :– Take special care to avoid Take special care to avoid
dirt entrydirt entry– Follow vacuum procedure Follow vacuum procedure
prescribed in installation prescribed in installation manualmanual
Installation related : Refrigerant pipe workInstallation related : Refrigerant pipe work
• Mistake :Mistake :– Incorrectly positioned Incorrectly positioned
refnetrefnet
• Problem :Problem :– Refrigerant noiseRefrigerant noise– Unequal refrigerant Unequal refrigerant
distribution causes lack of distribution causes lack of capacity at some indoorscapacity at some indoors
• Advise :Advise :– Install refnet according to Install refnet according to
specification installation specification installation manual.manual.
OK OK
Installation related : Refrigerant pipe workInstallation related : Refrigerant pipe work
• Mistake :Mistake :– Pipe not connected Pipe not connected
correctly to refnetcorrectly to refnet
• Problem :Problem :– Refrigerant noiseRefrigerant noise– Unequal refrigerant Unequal refrigerant
distribution causes lack distribution causes lack of capacity at some of capacity at some indoorsindoors
• Advise :Advise :– Install refnet according Install refnet according
to specification to specification installation manual.installation manual.
Installation related : Drain pipe workInstallation related : Drain pipe work
• Mistake :Mistake :– Too small drain pipeToo small drain pipe
• Problem :Problem :– Water can not evacuate Water can not evacuate
and drain switch and drain switch activatesactivates
– Water leakage can occurWater leakage can occur
• Advise :Advise :– Use drain pipe size Use drain pipe size
advised in installation advised in installation manualmanual
Installation related : Drain pipe workInstallation related : Drain pipe work
• Mistake :Mistake :– Drain trap installedDrain trap installed
without cleaning without cleaning possibilitypossibility
• Problem :Problem :– Dust and rubbish Dust and rubbish
accumulates in trap and accumulates in trap and blocks the pipeblocks the pipe
• Advise :Advise :– Don’t use drain trapDon’t use drain trap– If inevitable, make it as If inevitable, make it as
indicated in pictureindicated in picture
Installation related : Drain pipe workInstallation related : Drain pipe work
• Mistake :Mistake :– Too long distance Too long distance
between suspension between suspension points of drain pipepoints of drain pipe
• Problem :Problem :– Pipe bends trough and Pipe bends trough and
water can not flow outwater can not flow out
• Advise :Advise :– Suspension distance Suspension distance
should be 0,8 ~ 1 mshould be 0,8 ~ 1 m– Slope should be 1/100Slope should be 1/100
Installation related : Drain pipe workInstallation related : Drain pipe work
• Mistake :Mistake :– Too small pipe size in Too small pipe size in
collective pipecollective pipe
• Problem :Problem :– Drain switch activated Drain switch activated
by water flow by water flow obstruction in too small obstruction in too small pipe size.pipe size.
• Advise :Advise :– Use drain pipe with ID Use drain pipe with ID
30 mm or more for 30 mm or more for collective pipingcollective piping
Installation related : Electrical wiringInstallation related : Electrical wiring
• Mistake :Mistake :– Wire tightened over the Wire tightened over the
insulation partinsulation part
• Problem :Problem :– Wire overheatedWire overheated– Over current safety Over current safety
activatesactivates
• Advise :Advise :– Fix wires according to Fix wires according to
drawing on the leftdrawing on the left
Installation related : FixationInstallation related : Fixation
Floor mounted type
FXLQ
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
Installation related : Wrong position of indoor unitInstallation related : Wrong position of indoor unit
•Mistake :Mistake :No free air suctionNo free air suction
•Problem :Problem :Refrigerant can not Refrigerant can not be evaporated be evaporated causing capacity causing capacity Shortage & Shortage & compressor break-compressor break-downdown
•Advise :Advise :Provide enough Provide enough room for free air room for free air suctionsuction
Installation related : Wrong position of indoor unitInstallation related : Wrong position of indoor unit
Application related : Installation lay-outApplication related : Installation lay-out
• Mistake :Mistake :– Indoor unit with Indoor unit with
different demand different demand on one H/P systemon one H/P system
• Problem :Problem :– Too cold in Too cold in
meeting roommeeting room
• Advise :Advise :– Use heat-recovery Use heat-recovery
or connect indoor or connect indoor meeting room to meeting room to system with same system with same operation mode operation mode requestrequest
NORTH
SOUTH
Meeting room
Landscape office
HEATPUMP OUTDOOR
High internal heat load =
cooling demand
No internal heat load, NORTH side
= heating demand
Application related : Air distributionApplication related : Air distribution
• Mistake :Mistake :– Wrong location Wrong location
suction/discharge suction/discharge grillgrill
• Problem :Problem :– Air short - circuitAir short - circuit
• Advise :Advise :– Install grills in the Install grills in the
room in such a room in such a way to obtain a way to obtain a good air good air circulationcirculation
location grillesAir suction
grille
Air dischargegrille
Largestarea
no directair circulation
Application related : Air circulationApplication related : Air circulation
• Mistake :Mistake :– Air suction side Air suction side
does not come does not come from air-from air-conditioned roomconditioned room
• Problem :Problem :– Can not heat or Can not heat or
cool the office cool the office enoughenough
• Advise :Advise :– Air suction Air suction
should be done should be done from room to be from room to be air-conditioned.air-conditioned.
BASEMENT
OFFICE
Air suction from basement
at 16°C
Air outlet
Application related : Air distributionApplication related : Air distribution
• Mistake :Mistake :– Air short circuitAir short circuit
• Problem :Problem :– Can not heat or Can not heat or
cool the room cool the room properlyproperly
• Advise :Advise :– Avoid obstruction Avoid obstruction
at air outletat air outlet– Separate air Separate air
outlet from air outlet from air suction (e.g. suction (e.g. suction at floor suction at floor level, outlet at level, outlet at ceiling level)ceiling level)
Air suction
Air outlet behind couch
Application related : Air distributionApplication related : Air distribution
• Mistake :Mistake :– Ceiling not closedCeiling not closed
• Problem :Problem :– Heating capacity Heating capacity
shortage because shortage because warm air goes via warm air goes via the gap into the the gap into the false ceilingfalse ceiling
• Advise :Advise :– Use closed ceiling Use closed ceiling
so that warm air so that warm air can not escape to can not escape to ceiling voidceiling void
Gap (open ceiling)
Unit installed in
panel
Application related : Fresh air Application related : Fresh air connectionconnection
• Mistake :Mistake :– Fresh air Fresh air
connection to connection to branch ductbranch ductconnection of connection of FXYFFXYF
• Problem :Problem :– Discharge air unit Discharge air unit
can escape via can escape via fresh air ductingfresh air ducting
• Advise :Advise :– Use fresh air kit Use fresh air kit
chamber , chamber , “KDDJ55G80-1” “KDDJ55G80-1” and duct-and duct-connection, connection, “KDDJ55G80-2”“KDDJ55G80-2”
Branch duct connection
Application related : Service spaceApplication related : Service space
• Mistake :Mistake :– Installation Installation
location outdoor location outdoor create air - create air - recirculationrecirculation
• Problem :Problem :– Outdoor temp is Outdoor temp is
27°C, but at inlet 27°C, but at inlet condensor VRV it is condensor VRV it is 40°C.40°C.
– Efficiency & life Efficiency & life time go down, unit time go down, unit can trip on HP can trip on HP safetysafety
• Advise :Advise :– Respect Respect
installation service installation service space advised by space advised by DaikinDaikin
Application related : Temperature Application related : Temperature controlcontrol
• Mistake :Mistake :– Bad location Bad location
remote sensorremote sensor
• Problem :Problem :– Unit stops Unit stops
although set although set temperature is temperature is not reachednot reached
• Advise :Advise :– Never install Never install
remote sensor remote sensor where discharge where discharge air can influence air can influence the sensorthe sensor
Remote air sensor influenced by discharge air
unit
COLD AIR
Application related : Temperature controlApplication related : Temperature control
• Mistake :Mistake :– No use of remote No use of remote
sensorsensorfor unit with free for unit with free suctionsuction
• Problem :Problem :– Warm air (cooling) or Warm air (cooling) or
cold air (heating) from cold air (heating) from the ceiling void the ceiling void influences the unit influences the unit sensorsensor
– Bad temperature Bad temperature controlcontrol
• Advise :Advise :– Install remote sensor Install remote sensor
when using free when using free suctionsuction
DUCT UNIT : e.g. FXSQ80M7V1B
Unit sensor
Air false ceiling
enters the unit
Room air18°C
28°C
Setpoint 21°Ccooling
Why?
1. 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
Application related : Temperature controlApplication related : Temperature control
Problem: Overheating of a small room where temperature control seems to not work.
1. Install Remote sensor
2. Disable the Remote controller sensor
1. Enable the Heating optimization function of the Intelligent Touch Controller: the indoor unit fan is forced off at the thermostat off.
Application related : Temperature controlApplication related : Temperature control
Problem: Overheating of a small room where temperature control seems to not work.
Countermeasure: