Method For Connecting The Accessory Pipe (Models Fdc200,250 Only) - Mitsubishi Electric FDF100VSXVD Technical Manual

(4) Method for connecting the accessory pipe (Models FDC200,250 only)

Be sure to use the accessory pipe to connect the operation valve on the gas
side with the field pipe.
Referring to Table and Table
which are used in the construction examples
Firstly, use the accessory pipe to assemble the connecting pipe assembly outside the
outdoor unit.
As shown in the figures of construction examples
direction(chain double dashed line), braze the accessory pipe and the parts prepared
in the above .
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.
After connection of the connecting pipe assembly to the service valve on the
gas side, braze the connecting pipe assembly and the field pipe.
Table Parts used for the connecting pipe assembly
No. Name Qty.
1 Accessory pipe A 1
2 Straight pipe 1
3 Straight pipe 1 or 0
4 Elbow 1 or 0
Table Length of the straight pipe (prepared in the field)
Pipe size
Straight
22.22 t1.6
pipe
Straight
22.22 t1.6
pipe
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.
About brazing
Be sure to braze while supplying nitrogen gas.
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.
Straight pipe
to be procured locally
, prepare the straight pipe and the elbow in the field,
applicable to the connecting direction.
~
A D
applicable to the connecting
~
A D
Remarks
Accessories
Procured in the field
Procured in the field (Not required for downward direction)
Procured in the field (Not required for downward direction)
Downward Forward
above 415mm 185~235mm
- above 125mm
Branching pipe set can be used by using the accessory pipe B.
When 22.22(OD) size of the indoor unitgas pipe is used, the
accessory pipe B is unnecessory.
Accessory pipe A
22.22(OD)
Field piping
Elbow to be
procured locally
Position for the
accessory pipe
Rightward Backward
185~235mm 185~235mm
above 125mm above 405mm
Branching pipe set
22.22(OD)
(DIS-WB1,DIS-TB1)
Accessory pipe B
In case of V-multi
- - 83 83 - -
'11 • PAC-T-160
PSB012D917C
A B
ID22.22
OD25.4
ID22.22
1 pc
1 pc
Appropriate torque
19.05 100~120N·m
Position for connecting
the service valve on
the gas side
Inner face of
the base
(44)
K