Hitachi UTOPIA R410A Series - Page 41

? NOTE
Placeinsulation(eldsupplied)toprotectcablesandpipesfrom
beingdamagedbyplateedges.
b. For the downward piping
Gas piping
Knock-out hole
Bottom base
Cables
Liquid piping
? NOTE
Cablesshallnotcontactdirectlytothepipes.
c. For the rear side piping
Rear Cover
? NOTE
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,

3 
directly, it is recommended use a tube bender.
4 Check to ensure that the stop valves are closed completely
before connecting pipes.
5 

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

Outdoor unit stop valve
Spindle Type

Spindle valve

Flare nut

Cap

Check joint for service port
Closed upon factory shipping
Tightening Torque (Nm)
   
Liquid valve 7-9 33-42 33-42
14-18
Gas valve 9-11 68-82 50-62
Spindle Type
Nº Description Remarks

Cap

Allen wrench

Gas valve: Hex 5 mm

Refrigerant Piping Field Supplied

Flare nut

Refrigerant Pressure To Outdoor Unit

Seat Surface Fully closed position

Check Joint
Only the charging hose can be
connected

Charge port cap

O-Ring Rubber

Spindle valve
Open – Counterclockwise
Close – Clockwise
Do not apply two
spanners at this
position. If applied,
leakage will occur.
Stop valve
(Spindle type)
Flare nut
Refrigerant piping & refrigerant charge
PMML0545 rev.2 - 04/2021
10
EN