Hitachi CH-Box - Page 27

P5417025-rev.1
17
(b) IndoorUnitSideFieldPipingSize
●WhenabranchislocateddownstreamoftheCH-Box
●WhenabranchisnotlocateddownstreamoftheCH-Box
ConnectedIndoorUnit
Capacity:(Q)
GasPipe(D) LiquidPipe(E)
kW mm (inch) mm (inch)
Q < 16.0
f
15.88 (5/8)
1
f
9.52 (3/8)
1
Q = 16.0
f
19.05 (3/4)
f
9.52 (3/8)
1
1.Fieldaringworkisrequired.RefertoSection5.1forthearingwork.
ConnectedIndoorUnit
Capacity:(Q)
GasPipe(D) LiquidPipe(E)
Remarks
kW mm (inch) mm (inch)
Q≤6.3
f
12.7 (1/2)
f
6.35 (1/4)
Useaccessorypipe(1)ongaspipeside
andaccessorypipe(2)onliquidpipesideto
decreasethepipesize.
7.1≤Q≤16.0
f
15.88 (5/8)
1
f
9.52 (3/8)
1
-
Q = 22.4
f
19.05 (3/4)
f
9.52 (3/8)
1
Useaccessorypipe(3)ongaspipesideto
increasethepipesize.
Q = 28.0
f
22.2 (7/8)
f
9.52 (3/8)
1
Useaccessorypipe(4)ongaspipesideto
increasethepipesize.
1.Fieldaringworkisrequired.RefertoSection5.1forthearingwork.
NOTES:
1. WhenconnectingtheGasPipe(D)andLiquidPipe(E),reusethearenutattachedtothe
CH-Box.
2. Whentheconnectedindoorunitcapacityis6.3kWorlessandthepipinglengthexceeds15m(49ft.),
use9.52mm(3/8inch)fortheliquidpipe.
In case the piping connection is not used for the indoor unit side piping connection, it must be
sealed using the closed are nut originally attached. These are nuts have been tightened by
torque specications shown below before shipping. Ensure that they are sealed completely.
NOTICE