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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


• 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


• 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


• 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


• 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


• 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


• 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


• 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


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.


Problem: Overheating of a small room where temperature control seems to not work.

Countermeasure:

learning, our way examples of bad installation. content installation related examples installation...

Documents

refrigerant pipe work

collective pipe problem

small drain pipe problem

pipe pipes

installation manual

cutter problem

small pipe size

positioned refnet problem