Hitachi RPI-6.0FSN4E - 8.1.7 Refrigerant pipe connection for heat pump systems (2 pipes) and heat recovery systems (3 pipes); Heat pump systems (2 pipes)

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Refrigerant pipe suspension
Only suspend the refrigerant pipes at specic points of the build-
ing. Whenever possible, avoid suspending them from parts sub-
ject 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.
8.1.7 Refrigerant pipe connection for heat pump systems (2 pipes) and heat recovery systems
(3 pipes)
Perform the piping connection work for each outdoor unit. Prepare the refrigerant pipe in the eld for the piping work.
Heat pump systems (2 pipes)
(All measurements are in mm)
This piping connection is NOT used
at heat pump system (2 pipes)
Refrigerant gas piping connection
(High/Low pressure)
Refrigerant liquid piping connection
Refrigerant piping and
wiring connection holes
(knockout holes)
Refrigerant gas piping connection
(High/Low pressure)
Refrigerant liquid piping connection
Refrigerant liquid piping connection
Refrigerant gas piping connection (High/Low pressure)
Square holes at
front and back sides
85
82 250
130 108
132
110
19065
289
275
2 Control cable outlets
(∅33 knockout hole)
Power source cable outlet
(∅65 knockout hole)
Refrigerant piping outlet
(high/low pressure gas, liquid)
(knockout square hole)
(mm)
Model A B C D E F
RAS-8FSXN1E
∅19.05 ∅9.52
150 150 340 205RAS-10FSXN1E
∅22.2 ∅9.52
RAS-12FSXN1E
∅25.4 ∅12.7
RAS-14FSXN1E
∅25.4 ∅12.7
170 170 325 200
RAS-16FSXN1E
∅28.58 ∅12.7
(mm)
Model A B C D E F
RAS-5FSXNH(E)
∅15.88 ∅9.52
150 150
340 205
RAS-6FSXNH(E)
∅19.05 ∅9.52
RAS-8FSXNH(E)
∅19.05 ∅9.52
170 170RAS-10FSXNH(E)
∅22.2 ∅9.52
RAS-12FSXNH(E)
∅25.4 ∅12.7
32
PMML0294A rev.2 - 07/2014
Piping work and refrigerant charge
PMML0294A_rev.2_02-2014.indb 32 14/07/2014 12:28:21