Mitsubishi Electric HP120TNU-A Service Handbook page 317

[8-13 Parts Replacement Instructions ]
(13) Cut the pipe below four-way valves (21S4a and 21S4b) with a pipe cutter as shown in the figure.
Remove the braze at the areas circled in the figure to remove 21S4a and 21S4b assemblies. (2 areas to be cut. 5 areas to
remove braze from. See Figure 13-2.)
Four-way valve (21S4a)
Remove the braze here.
Remove the braze here.
Remove the
braze here.
Four-way valve
(21S4a)
LEV2d
Remove the braze here.
Cut the pipe here.
Gas-liquid separator
76
- chapter 8
Figure 13-1
Four-way valve
(21S4b)
Four-way valve (21S4a)
Cut the pipe here.
Check valve
block
Remove the braze here.
Figure 13-2
The replacement parts for this part is included
with the replacement kit that contains check
valve block assembly. Use the pipe included
with the check valve.
Remove the braze here.
Four-way valve (21S4b)
LEV2d
Cut the pipe here.
Cut the pipe here.
Four-way valve (21S4b)
LEV2d
Four-way valve (21S4a and
21S4b) assemblies
HWE18220_GB