Hitachi UTOpIA IvX Series Instruction Manual page 26

REFRIGERANT PIPING & REFRIGERANT CHARGE
?
n o t e
Hold the cover with a hand to remove screws as the cover may fall down.
Service cover
Hook (three places): two fans
Hook (two places): one fan
a. For the front and side piping
To use racking or conduit tubes, check the size and
remove part following the slit.
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n o t e
Place insulation (field supplied) to protect cables and pipes from
being damaged by plate edges.
b. For the downward piping
Cables
Liquid piping
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n o t e
Cables shall not contact directly to the pipes.
c. For the rear side piping
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n o t e
Remove the rear pipe cover under the rear cover and remove
part following the slit.
10 PMML0397B rev.3 - 01/2020 - P5416650
(picture as example)
Front piping hole
Side piping hole
Gas piping
Knock-out hole
Bottom base
Rear Cover
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.

Outdoor unit stop valve
Spindle type




Closed upon factory shipping
tightening torque (nm)

Liquid valve
7-9
Gas valve
--
Do not apply two
spanners at this
position. If applied,
leakage will occur.
Ball type
(a)
Spindle valve
Flare nut
Cap
Check joint for service port
  
49-61 33-42 14-18
100-120 12-14 12-14
Stop valve
(Spindle type)
Flare nut