Hitachi FSXN1E Series Installation And Operation Manual page 46

Piping work and refrigerant charge

Refrigerant pipe suspension
Only suspend the refrigerant pipes at specific 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.
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 field for the piping work.
Heat pump systems (2 pipes)
(All measurements are in mm)
Square holes at
front and back sides
Model
RAS-8FSXN1E
∅19.05
RAS-10FSXN1E ∅22.2
RAS-12FSXN1E ∅25.4
RAS-14FSXN1E ∅25.4
RAS-16FSXN1E ∅28.58
32
PMML0294A_rev.2_02-2014.indb 32
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
A B C D E
∅9.52
∅9.52 150 150 340
∅12.7
∅12.7
170 170 325
∅12.7
PMML0294A rev.2 - 07/2014
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.
2 Control cable outlets
(∅33 knockout hole)
(mm)
F Model
RAS-5FSXNH(E)
205 RAS-6FSXNH(E)
RAS-8FSXNH(E)
RAS-10FSXNH(E)
200
RAS-12FSXNH(E)
Power source cable outlet
(∅65 knockout hole)
65 190
110
130 108
82 250
Refrigerant piping outlet
(high/low pressure gas, liquid)
(knockout square hole)
A B C D
∅15.88 ∅9.52
150 150
∅19.05 ∅9.52
∅19.05 ∅9.52 340
∅22.2 ∅9.52 170 170
∅25.4 ∅12.7
(mm)
E F
205
14/07/2014 12:28:21