Hitachi RAM-200FPS, Инструкция по установке и обслуживанию

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The header branch pipe fixed limits
：
The header branch pipe must be installed horizontally.
3) Mixing setting of line branch and header branch, as shown below
：
Note:
1.The line branch pipe can not be connected after the header branch pipe.
2.The first branch pipe can not use the header branch pipe.
5.2 Refrigerant Piping Work
1) Confirm that the stop valves of outdoor unit are closed.
2) Please connect the piping between indoor and outdoor unit. When tightening the joints
of piping, in the inside and outside of flare piping, please coated with a layer of
refrigerant oil [ Field-supplied (Idemitsu Kosan Co., Ltd.
Synthetic oil”FVC68D”)], and in
accordance with the provisions of tightening torque with double spanner to tighten. After
tighten, please confirm the gas leakage once more. During brazing, please blowing
nitrogen into the piping. Please connect the pipe which use the attached flange
combination, while use the attached washer to replace the original washer.
※
Please weld the flange combination and connection pipe in advance, and then lock with
the gas stop valve set.
3) Connect the indoor unit and the outdoor unit with field-supplied refrigerant piping. 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.)
4) Please perform the air-tight test. Connect the gauge manifold using charging hoses with a
vacuum pump or a nitrogen cylinder to the check joints of the liquid line and the gas line
stop valves. Perform the air-tight test. Connect a manifold gauge to the check joints of
the liquid and gas stop valves in the outdoor unit. Do not open the stop valves. Apply
nitrogen gas pressure of 4.15MPaG.
Required Torque
：
Spindle Valve Torque
N
．
m
Piping Size (mm)
and Flare Nut
Tightening Torque
N
．
m
Gas Liquid
Φ6.35(1/4”)
20 20~25 7~9
Φ9.53(3/8”)
40
Φ12.7(1/2”)
60 Hexagonal Wrench
Φ15.88(5/8”)
80 Gas Liquid
Φ19.05(3/4”)
100
10mm
5mm
Flange Bolt 52.5~75
1 After connection piping and before implementation the air tight test, Please remove the liquid and gas stop valve caps, the spindle
valve ensure that be closed with tightening torque N
．
m. Tightening the flare nut do not use more than the torque marking on the
table, too large torque will result in the spindle valve leakage.
Header Branch Pipe
Header Branch Pipe
Line Branch
Pipe
Header
Branch
Pipe
Correct Setting
Correct Setting
Wrong Setting
First Branch
First Branch
Second Branch
Indoor Unit
Maximum length 40m
Maximum length 40m
Do Not Apply The
Double Spanner Work
Here.
Refrigerant Leakage
Shall Occur.
Flare Nut
Stop Valve
Double Spanner Work
Flange Combination
Bolt 2 Piece
Spring Washer 2 Piece
Flat Washer 2 Piece
Attached Washer
Original
Washer
Gas Stop
Valve Set
Closed Flange
Discard
Flare Nut
Spring Washer 2 Piece
Flat Washer 2 Piece
5mm