Mitsubishi Electric PURY-M200YNW-A1 Service Handbook page 345

[8-13 Parts Replacement Instructions (Outdoor Unit) ]
(9A) Remove four-way valve (21S4a) by removing the braze from the area above four-way valve (21S4a) as shown in Figure
9.
Figure 9
(10A) Mount a new four-way valve (21S4a). Figure 10 shows how to position a new four-way valve.
Four-way valve (21S4a)
15°
Figure 10
(11A) To make it easier to connect four-way valve (21S4a), cut the pipe end below the raised hole (cut off the section covered
with brazing filler) on the pipe with a pipe cutter. Cut the pipe with an expanded end that is included with four-way valve
(21S4a) to the same length as the pipe that was removed from the on-site pipe. (See Figure 11.)
Cut the pipe here.
Four-way valve (21S4a)
Figure 11
(12A) Mount four-way valve (21S4a) to the pipe below four-way valve (21S4a) and on the back. A total of four areas require
brazing, including the area indicated in (11A) and the areas indicated in Figure 12.
Figure 12
78
- chapter 8
Remove the braze here.
Four-way valve (21S4b)
When seen from above, four-way valves (21S4a and 21S4b) are
tilted by 15°.
<S module>
Pipe diameter: φ19.05
ID of the pipe with an
extended end: φ19.05
<L module>
Pipe diameter: φ19.05
ID of the pipe with an
extended end: φ22.2
Severed pipe
Area to be brazed
Four-way
valve (21S4a)
Four-way valve (21S4a)
Cut the pipe with an expanded end that is
included with four-way valve (21S4a) so that the
section of the pipe excluding the extended end
will be the same length as the pipe that was
removed from the on-site pipe.
*The included pipe with an expanded end is 100
mm long. Cut it to the appropriate length.
Use the parts included
Area to be brazed
with four-way valve
(21S4a).
BS_08_L