Daikin FBQ100D_RZQG100L9V [17/52] Charging refrigerant
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Daikin FBQ100D_RZQG100L9V [17/52] Charging refrigerant

Daikin FBQ100D_RZQG100L9V [17/52] Charging refrigerant
6Installation
Installerreferenceguide
17
RZQG71~140L_V1+Y1+RZQSG100~140L_V1+Y1
Splitsystemairconditioners
4P3855221–2014.08
NOTICE
Use this vacuum pump for R410A exclusively. Using the
same pumpfor other refrigerants may damage the pump
andtheunit.
NOTICE
▪ Connectthevacuumpumptoboththeserviceportof
the gas stop valve and the service port of the liquid
stopvalvetoincreaseefficiency.
▪ Makesurethatthegasstopvalveandliquidstopvalve
are firmly closed before performing the leak test or
vacuumdrying.
6.5.3 Checkingrefrigerantpiping:Setup
a
c
f
c
f
b d e h
g
i
a
b
A
B
d e
R410A
R410A
A Setupincaseofpair
B Setupincaseoftwin
a Pressuregauge
b Nitrogen
c Refrigerant
d Weighingmachine
e Vacuumpump
f Stopvalve
g Mainpiping
h Refrigerantbranchkit
i Branchpiping
6.5.4 Tocheckforleaks
NOTICE
DoNOTexceedtheunit'smaximumworkingpressure(see
"PSHigh"ontheunitnameplate).
NOTICE
Make sure to use a recommended bubble test solution
from your wholesaler. Do not use soapwater, which may
causecrackingofflarenuts(soapwatermaycontainsalt,
which absorbs moisture that will freeze when the piping
gets cold), and/or lead to corrosion of flared joints (soap
water may contain ammonia which causes a corrosive
effectbetweenthebrassflarenutandthecopperflare.
1 Chargethesystemwithnitrogengasuptoagaugepressureof
at least 200 kPa (2 bar). It is recommended to pressurize to
3000kPa(30bar)inordertodetectsmallleaks.
2 Check for leaks by applying the bubble test solution to all
connections.
3 Dischargeallnitrogengas.
INFORMATION
Afteropeningthestopvalve,itispossiblethatthepressure
intherefrigerantpipingdoesNOTincrease.Thismightbe
causedbye.g. the closed state of the expansion valve in
theoutdoorunitcircuit,butdoesNOTpresentanyproblem
forcorrectoperationoftheunit.
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.
ForRZQGonly:Whenpipinglengthis<5m,acompleterechargeof
theunitisrequired.
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.

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