Daikin AZQS100B8V1B - Vacuum Drying; To Perform Vacuum Drying; Charging Refrigerant; About Charging Refrigerant

6Installation
Installerreferenceguide
15
AZQS100~140B8V1B+AZQS100~140B7Y1B
Splitsystemairconditioners
4P3855291–2014.08
6.5.5 Toperformvacuumdrying
1 Vacuumthesystemuntilthepressureonthemanifoldindicates
−0.1MPa(−1bar).
2 Leaveasisfor45minutesandcheckthepressure:
Ifthepressure… Then…
Doesnotchange Thereisnomoistureinthe
system.Thisprocedureis
finished.
Increases Thereismoistureinthe
system.Gotothenextstep.
3 Evacuateforat least2hours toapressure onthemanifold of
−0.1MPa(−1bar).
4 After turning OFF the pump, check the pressure for at least
1hour.
5 IfyoudoNOTreachthetargetvacuumorcannotmaintainthe
vacuumfor1hour,dothefollowing:
▪ Checkforleaksagain.
▪ Performvacuumdryingagain.
NOTICE
Make sure to open the stop valves after installing the
refrigerantpipingand performing vacuumdrying.Running
the system with the stop valves closed may break the
compressor.
6.6 Chargingrefrigerant
6.6.1 Aboutchargingrefrigerant
The outdoor unit is factory charged with refrigerant, but in some
casesthefollowingmightbenecessary:
What When
Chargingadditionalrefrigerant Whenthetotalliquidpiping
lengthismorethanspecified
(seelater).
Completelyrechargingrefrigerant Example:
▪ Whenrelocatingthesystem.
▪ Afteraleak.
Chargingadditionalrefrigerant
Beforechargingadditional refrigerant, makesurethe outdoor unit's
externalrefrigerantpipingischecked(leaktest,vacuumdrying).
INFORMATION
Dependingontheunitsand/ortheinstallationconditions,it
mightbenecessarytoconnectelectricalwiringbeforeyou
canchargerefrigerant.
Typical workflow – Charging additional refrigerant typically consists
ofthefollowingstages:
1 Determiningifandhowmuchyouhavetochargeadditionally.
2 Ifnecessary,chargingadditionalrefrigerant.
3 Fillinginthefluorinatedgreenhousegaseslabel,andfixingitto
theinsideoftheoutdoorunit.
Completelyrechargingrefrigerant
Beforecompletelyrechargingrefrigerant,makesurethefollowingis
done:
1 Thesystemispumpeddown.
2 Theoutdoorunit'sexternalrefrigerantpipingischecked(leak
test,vacuumdrying).
3 Vacuumdryingontheoutdoorunit'sinternalrefrigerantpipingis
performed.
NOTICE
Before completely recharging, perform vacuum drying on
theoutdoorunit'sinternalrefrigerantpipingaswell.Todo
so, use the internal service port of the outdoor unit
(between the heat exchanger and the 4way valve). Do
NOT use the service ports of the stop valves, because
vacuum drying cannot be performed properly from these
ports.
WARNING
Some sections of the refrigerant circuit may be isolated
from other sections caused by components with specific
functions (e.g. valves). The refrigerant circuit therefore
features additional service ports for vacuuming, pressure
relieforpressurizingthecircuit.
Incaseitisrequiredtoperformbrazingontheunit,ensure
thatthereisnopressureremaininginsidetheunit.Internal
pressuresneedto be releasedwithALL the serviceports
indicated on the figures below opened. The location is
dependingonmodeltype.