Hitachi CH-Box - Page 24

14
P5417025-rev.1
(3) SelectingPipingSize
● Selectthesizeforthehigh/lowpressuregaspipe,
lowpressuregaspipeandliquidpipeaccording
toTable5.1.Thesizedependsontheindoorunit
totalcapacityconnecteddownstreamofthe
CH-Box.
● Asforthemulti-kitbranchorheaderbranch,refer
totheTechnicalCatalogfortheOutdoorUnit.
● PerformthepipingconnectionworkfortheCH-Box
asshownbelow.
(a) OutdoorUnitSideFieldPipingSize
Table5.1OutdoorUnitSideFieldPipingSize
Connected
IndoorUnitCapacity:Q
LowPressure
GasPipe(A)
High/LowPressure
GasPipe(B)
LiquidPipe(C)
kW mm (inch) mm (inch) mm (inch)
< 16.0
f
15.88 (5/8)
f
12.7 (1/2)
f
9.52 (3/8)
16.0≤Q<25.0
f
19.05 (3/4)
f
15.88 (5/8)
f
9.52 (3/8)
25.0≤Q<33.5
f
22.2 (7/8)
f
19.05 (3/4)
f
9.52 (3/8)
33.5≤Q<45.0
f
25.4 (1)
f
22.2 (7/8)
f
12.7 (1/2)
45.0≤Q<50.0
f
28.58 (1-1/8)
f
22.2 (7/8)
f
12.7 (1/2)
50.0≤Q<61.5
f
28.58 (1-1/8)
f
22.2 (7/8)
f
15.88 (5/8)
61.5≤Q<73.0
f
28.58 (1-1/8)
f
25.4 (1)
f
15.88 (5/8)
73.0≤Q≤85.0
f
31.75 (1-1/4)
f
28.58 (1-1/8)
f
19.05 (3/4)
NOTE:
Referto“PositionofPipingConnection”forthedetailsofthepipingconnectionfortheCH-Box.
Useeld-suppliedreducerincasetheeldpipingandCH-Boxpipingconnectiondoesnotmatch.
(a) Outdoor Unit Connecting Side
High/Low Pressure
Gas Pipe (B)
(Field-Supplied)
(Field-Supplied)
(Field-Supplied)
(Field-Supplied)
(Field-Supplied)
Low Pressure
Gas Pipe (A)
Liquid Pipe (C)
Gas Pipe (D)
Liquid Pipe (E)
(b) Indoor Unit Connecting Side
(2) PipingWorkforCH-Box
RefertoTechnicalCatalogueandInstallationManualoftheoutdoorunitforthepipingdiameterand
theinstallationcondition.