Mitsubishi Electric HP120TNU-A Service Handbook page 320

[8-13 Parts Replacement Instructions ]
(19) Re-place the check valve assemblies (21S4a and 21S4b) whose pipes were replaced in step (16). (8 areas to be brazed.
See Figure 19.)
Four-way valve
(21S4a)
Area to be
brazed
Area to be
brazed
(20) Re-place the LEV4 assembly that was removed in step (11) as it was. (3 areas to be brazed. See Figure 20.)
Area to be
brazed
A
(21) Re-place the components that were removed as they were. This step completes the check valve block assembly replace-
ment procedure.
HWE18220_GB
Area to be brazed
Four-way valve
(21S4b)
Area to be brazed
LEV2d
Area to be brazed
Figure 19
Area to be brazed
Injection pipe
LEV4
Rubber spacer
Replace the pipe that
was cut in step (11)
with the pipe included
45°
with the check valve
block assembly.
Figure 20
Area to be brazed
Four-way valve
(21S4a)
Area to be
brazed
LEV2d
Replace the pipe that
was cut in step (13)
with the pipe included
with the check valve
block assembly.
Area to be brazed
Injection pipe
LEV4
Area to be
brazed
A
Braze with the rubber
spacer attached.
Four-way valve
(21S4b)
Area to be
brazed
Check valve
block
Area to be brazed
79
chapter 8 -