Mitsubishi Heavy Industries FDT200VSAWPVH Service Manual page 170

5.4 Method for connecting the accessory pipe
Models FDC200VSA-W, 250VSA-W, 280VSA-W
● Be sure to use the accessory pipe to connect the service valve on the gas side with the field pipe.
● Be sure to use the straight pipe （Procured at the field） shown in the table 1 applicable to the model
of outdoor unit.
● When tightening the flare, connect the pipe securely by pressing the flared face of pipe against
the service valve.
● When brazing between the pipe in place and the attached pipe, confirm that no excessive force is
applied to the flare joint. Otherwise gas could leak from the flare joint.
● Connect the attached pipe according to the following steps
Referring to Table 2 and Table 3, prepare the straight pipe and the elbow in the field, which are
1
used in the construction examples
Firstly, use the accessory pipe to assemble the connecting pipe assembly outside the outdoor unit.
2
（As shown in the figure of connecting examples
After assembling the connecting pipe, connect it to the service valve on the gas side
3
inside the outdoor unit. Tighten the flare nut with appropriate torque.
Proper torque
φ19.05 100−130N・m
After connection of the connecting pipe assembly to the service valve on the gas side,
4
braze the connecting pipe assembly and the field pipe.
When connecting pipe contacts wiring, attach heat insulating material to the pipe in order to prevent
5
from contacting of the pipe and wiring. （If the wiring is rubbed with the pipe and the cover of wiring
is teared, there is a risk of a short circuit or an electtric shock.）
【Connection example − applicable to the connecting direction.】
● The piping angle shown below is an example in case of 15mm of heat insulating material.
Adjust an angle, according to the thickness of heat insulating material.
Pass the connecting pipe in a hole after angle adjustment.
Service valve
connecting position
at gas side
Connection example
of refrigerant pipe―
A
（Downward connection）
－ applicable to the connecting direction.
D
A
A D
40
（Internal face
of base）
（Internal face
of base）
Accessory pipe A
Straight pipe
1
（Procured in the field,
400mm or more）
Elbow,procured
in the field
Braze the refrigerant
pipe here
Braze the refrigerant
Connection example
pipe here
of refrigerant pipe―
（Forward connection）
169
-
－ .
5
1
－ .）
A D
Service valve
connecting position
at gas side
B
-
'21 • PAC-SM-383
PSC012D028H
69
（Internal face
of base）
（Internal face
of base）
Accessory pipe A
Straight pipe
1
（Procured in the field,
192.5−202.5mm）
Straight pipe
2
（Procured in the field,
105mm or more）
F