Hitachi RAS-3HVRNM2 - Connecting Refrigerant Pipings

2-104
TC-12001
OUTDOOR UNIT
28
P5414950-rev.1
Table 6.3 Tightening Work of Flare Nut
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connection and piping, and wind a tape for
the insulation.
Required Torque (Based on JIS B8607)
Pipe Size Tightening Torque
I
6.35 (1/4”) 14-18 N.m
I
9.52 (3/8”) 34-42 N.m
I
12.7
(1/2”) 49-61 N.m
I
15.88 (5/8”) 68-82 N.m
I
19.05 (3/4”) 100-120 N.m
6.5 Connecting Refrigerant Pipings
(1) The stop valve has been closed before
shipment, however, make sure that the stop
valves are closed completely.
(2) Connect the indoor unit and the outdoor unit
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Suspend the refrigerant piping at certain
points and prevent the refrigerant piping
from touching the weak part of the building
such as wall, ceiling, etc.
(If touched, abnormal sound may occur due
to the vibration of the piping. Pay special
attention in case of short piping length.)
(3) Apply the oil thinly at the seat surface of the
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spanners.
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Model: FVC68D (Ether Oil)
Manufacturer: IDEMITSU KOSAN Co., Ltd.
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in the table.
Two Spanners Work Tightening Work for Stop Valve
Do not apply the two
spanners work here.
Refrigerant leakage shall occur.
Flare Nut
Stop Valve