Mitsubishi Electric PURY-M200YNW-A1 Service Handbook page 348

[8-13 Parts Replacement Instructions (Outdoor Unit) ]
(18B) To make it easier to connect four-way valve (21S4b), cut the pipe between the section above four-way valve (21S4b) and
the pipe bend with a pipe cutter. Cut the pipe with an expanded end that is included with four-way valve (21S4b) to the
same length as the pipe that was removed from the on-site pipe. (See Figure 18.)
Figure 18
(19B) Mount four-way valve (21S4b) to the pipe below four-way valve (21S4b) and in the middle. A total of five areas require
brazing, including the area indicated in (18B) and the areas indicated in Figure 19. Mount four-way valve (21S4b)
horizontal to four-way valve (21S4a) as shown in (10A).
Figure 19
(20B) Install the pipe below four-way valve (21S4b) and on the front by brazing at the two areas shown in Figure 20.
Figure 20
This step completes the replacement procedure for four-way valve (21S4b). Re-place the components that were removed as
they were.
BS_08_L
<S module>
Cut the pipe here.
Pipe diameter: φ12.7
ID of the pipe with an
extended end: φ12.7
<L module>
Pipe diameter: φ19.05
ID of the pipe with an
extended end: φ19.05
Four-way valve (21S4b)
Severed pipe
Area to be brazed
Area to be
brazed
Area to be brazed
Area to be brazed
Cut the pipe with an expanded end that
is included with four-way valve (21S4b)
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 with
four-way valve (21S4a).
Four-way
valve (21S4b)
Four-way valve (21S4b)
Area to be brazed
Reinstall these pipes.
When installing four-way
valve (21S4b), first braze
the pipe outside the unit
and then install it to the
unit.
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