Hitachi UTOPIA IVX STANDARD Serie Manual De Instrucciones página 21

REFRIGERANT PIPING & REFRIGERANT CHARGE
b. For the downward piping
Cables
Liquid piping
?
N O T E
Cables shall not contact directly to the pipes.
c. For the rear side piping
?
N O T E
Remove the rear pipe cover under the rear cover and remove
part following the slit.
2 Mount the piping cover in order to avoid water entering into
the unit. Seal the holes where pipes and wires are inserted,
by using a insulation (field-supplied).
3 If the field-supplied piping is connected with stop valves
directly, it is recommended use a tube bender.
4 Check to ensure that the stop valves are closed completely
before connecting pipes.
5 Connect the field supplied refrigerant pipes to the indoor unit
and outdoor unit. Apply the oil thinly at the seat flare nut and
pipe before tightening.
6 After connecting the refrigerant piping, seal the open space
between knockout hole and refrigerant pipes by using
insulation material.
7 Operation of stop valve should be performed according to
the figure below.
11 PMML0395B rev.0 - 11/2015
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Gas piping
Knock-out hole
Bottom base
Closed upon factory shipping
Rear Cover
Outdoor unit stop valve
Spindle Type




Tightening Torque (Nm)

Liquid valve 7-9
Gas valve 9-11
Spindle Type
Nº Description
Cap

Allen wrench Hex 4 mm

Refrigerant Piping Field Supplied

Flare nut

Refrigerant
To Outdoor Unit

Pressure
Seat Surface Fully closed position

Only the charging those can be
Check Joint

connected
Charge port cap

O-Ring Rubber

Open – Counterclockwise
Spindle valve

Close – Clockwise
Do not apply two
spanners at this
position. If applied,
leakage will occur
Spindle valve
Flare nut
Cap
Check joint for service port
  
33-42
33-42 14-18
68-82
Remarks
Stop valve
(Spindle type)
Flare nut