Hitachi AIR CORE 700 PPIM-B18UFA1DQ Manuel D'utilisation, D'installation Et D'entretien page 23

2. As shown in figure 5.4, use two wrenches to fasten nuts.
3. After connecting the refrigerant pipe, perform heat insulation to the cooling pipeline using the thermal
insulation pipe.
Indoor unit
side
NOTICE
When a pipe passes the hole, seal its opening by a sealing cap.
•
Insert sealing caps at the ends of the tubes or fasten tightly with ethylene belt. The pipes cannot be
•
placed on the ground directly.
When installing the refrigerant pipe, ensure that the distance between the straight pipe and the
•
panel is greater than 15.75 inches(400 mm). The pipe is parallel to the machine by adding a fixed
plate or other fixing methods.
4. Discharge and charge the refrigerant pipelines by following the Installation and Maintenance Manual
of the outdoor unit.
NOTICE
Excessive or insufficient refrigerant is the major reason for system abnormalities. Please fill in the
•
refrigerant with appropriate amount.
Pipe Diameter [in. (mm)] Torque [lbf.ft. (N•m)]
Ø5/8 (15.88)
Figure 5.4 Torques in Fastening Nuts
Thermal
Insulation pipe
Wiring ribbon
Thermal insulation materials
Figure 5.5 Heat Preservation
It is prohibited for the pipes to be placed on
the ground directly.
Correct
Use tape or stopper to plug
-11-
5. Refrigerant Piping Work
Ø1/4 (6.35)
14.8 (20)
Ø3/8 (9.53)
29.5 (40)
Ø1/2 (12.7)
44.3 (60)
59.0 (80)
Refrigeration pipes
(Installation site preparation)
Insulation pipes
(Installation site preparation)
Incorrect
Unit: in(mm)
Fixed Plate
Refrigerant Pipe
(≥15.75(400))