Daikin Siesta - Checking Refrigerant Piping

3Installation
Installationmanual
6
AZQS100~140B8V1B+AZQS100~140B7Y1B
Splitsystemairconditioners
4P3855281–2014.08
3.2.2 Todetermineifoiltrapsarerequired
Ifoilflowsbackintotheoutdoorunit'scompressor,thismightcause
liquidcompressionordeteriorationofoilreturn.Oiltrapsintherising
gaspipingcanpreventthis.
If Then
Theindoorunitisinstalled
higherthantheoutdoor
unit
Installanoiltrapevery10m(height
difference).
a
b
10 m
aRisinggaspipingwithoiltrap
bLiquidpiping
Theoutdoorunitis
installedhigherthanthe
indoorunit
OiltrapsareNOTrequired.
3.3 Checkingtherefrigerantpiping
3.3.1 Checkingrefrigerantpiping:Setup
a
c
f
b d e
R410A
a Pressuregauge
b Nitrogen
c Refrigerant
d Weighingmachine
e Vacuumpump
f Stopvalve
3.3.2 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.
3.3.3 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.
3.4 Chargingrefrigerant
3.4.1 Todeterminetheadditionalrefrigerant
amount
Todetermineifaddingadditionalrefrigerantisnecessary
If Then
L1≤30m(chargelesslength) Youdonothavetoadd
additionalrefrigerant.
L1>30m Youmustaddadditional
refrigerant.
Forfutureservicing,encirclethe
selectedamountinthetables
below.
INFORMATION
Pipinglengthistheonewaylengthofliquidpiping.
Todeterminetheadditionalrefrigerantamount(Rinkg)
L1 (m)
30~40m 40~50m
R: 0.5kg 1.0kg
3.4.2 Todeterminethecompleterecharge
amount
Model
L1 (m)
5~10 10~20 20~30 30~40 40~50
AZQS100+125 1.9 2.4 2.9 3.4 3.9
AZQS140 3.0 3.5 4.0 4.5 5.0