Mitsubishi Electric FDF100VNVD, Техническое руководство

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'11 • PAC-T-160
Be sure to use the accessory pipe to connect the operation valve on the gas
side with the field pipe.
PSB012D917C
F
① Referring to Table ① and Table ② , prepare the straight pipe and the elbow in the field,
which are used in the construction examples applicable to the connecting direction.
②
Firstly, use the accessory pipe to assemble the connecting pipe assembly outside the
outdoor unit.
As shown in the figures of construction examples applicable to the connecting
direction(chain double dashed line), braze the accessory pipe and the parts prepared
in the above
①
.
③
After assembly of the connecting pipe, connect it to the service valve on the
gas side inside the outdoor unit.
Tighten the flare nut with appropriate torque.
④
After connection of the connecting pipe assembly to the service valve on the
gas side, braze the connecting pipe assembly and the field pipe.
A
~
D
A
~
D
OD25.4
1 pc
ID22.22
1 pc
A B
ID22.22
Appropriate torque
φ
19.05 100~120N·m
Table
①
Parts used for the connecting pipe assembly
Table
②
Length of the straight pipe (prepared in the field)
No. Name Qty. Remarks
1 Accessory pipe A 1 Accessories
2 Straight pipe
①
1 Procured in the field
3 Straight pipe
②
1 or 0 Procured in the field (Not required for downward direction)
4 Elbow 1 or 0 Procured in the field (Not required for downward direction)
●
Be sure to use pipes of 1/2H material, and wall thickness above 1mm. (Pressure resistance of O-type pipe is not enough)
●
Switch ON SW5-1 on the control PCB, if O-type pipe must be used and bent with the bender.
During heating operation, the high-pressure protection may be actuated under the condition lower than the normal pressure,
and the heating capacity may decrease.
Pipe size Downward Forward Rightward Backward
Straight
pipe
①
above 415mm 185~235mm 185~235mm 185~235mm
Straight
pipe
②
- above 125mm above 125mm above 405mm
φ 22.22 × t1.6
φ
22.22
×
t1.6
Accessory pipe A
Elbow to be
procured locally
Straight pipe φ 22.22(OD)
to be procured locally
Field piping φ 22.22(OD)
Accessory pipe B
※
In case of V-multi
Branching pipe set
(DIS-WB1,DIS-TB1)
(44)
Position for the
accessory pipe
(47)
Inner face of the base
Inner face of
the base
Position for connecting
the service valve on
the gas side
Be sure to braze while supplying nitrogen gas.
About brazing
If no nitrogen gas is supplied, a large amount of impurity
(oxidized fi lm) will be generated, which may clog the capillary
tube and the expansion valve, resulting in fatal malfunction.
●
Branching pipe set can be used by using the accessory pipe B.
When
φ
22.22(OD) size of the indoor unitgas pipe is used, the
accessory pipe B is unnecessory.
PSB012D917C
K
(4) Method for connecting the accessory pipe (Models FDC200,250 only)