Hitachi RAS-8FSXN - Refrigerant Pipe Connection for Heat Pump Systems (2 Pipes)

¿ Refrigerant pipe suspension
Only
suspend the refrigerant pipes at specific points of the building.
Whenever possible, avoid suspending them from parts subject to
structural movement, e.g. places close to expansion joints or outer
walls, etc.
Prevent the refrigerant pipes from touching weak parts of the
building, such as walls (non-structural), partition walls, ceilings, etc.
Otherwise, operating noise may be caused by pipe vibrations (pay
special attention in the case of short pipes).
A: points where the refrigerant pipes pass through the different
structural parts of the building.
B: indoor unit.
Use suitable suspension systems for refrigeration pipes or clamps
to suspend the pipes, as shown in the diagram.
3.1.6 Refrigerant pipe connection for heat pump systems (2 pipes)
¿ Pipe sizes for RAS-(8-18)FSXN (Base unit)
a
All measurements are in mm.
Model
RAS-8
FSXN
RAS-10
FSXN
RAS-12
FSXN
RAS-14
FSXN
RAS-16
FSXN
RAS-18
FSXN
a
Gas ø19.05 ø22.2 ø25.4 ø25.4 ø28.6 ø28.6
Liquid ø9.53 ø9.53 ø12.7 ø12.7 ø12.7 ø15.88
If the main refrigerant pipe specified in the table is not available at the installation location, select the size given in brackets.
In this case, prepare a suitable reducer.
Main pipe Alternative pipe and reducer Main pipe Alternative pipe and reducer
ø9.53 (ø9.53-ø12.7) ø22.2 (ø22.2-ø25.4)
ø12.7 (ø12.7-ø15.88) ø25.4 (ø25.4-ø28.6)
ø15.88 (ø15.88-ø19.05) ø28.6 (ø28.6-ø31.75)
ø19.05 (ø19.05-ø22.2) – –
3 Piping work and
refrigerant charge
41
SMGB0065 rev. 1 - 12/2010
3