Mitsubishi Electric PUHY-M200YNW-A1 Service Handbook page 361

[8-13 Parts Replacement Instructions ]
(20) Remove the heat exchanger by diagonally lifting it up, using caution not to damage the fins or the pipes.
Removing the front heat exchanger
(Figure 17)
(21) Re-place the front and the rear heat exchangers in the reverse order as they were removed.
Re-place the components that were removed as they were.
Notes for replacing refrigerant circuit components (heat exchanger)
Be sure to perform non-oxidized brazing.
After brazing is done, check that the brazing is done properly and check for leaks before vacuum-drying the pipes.
Direct the brazing torch flame away from the wiring and sheet metals inside the unit not to damage them.
Place the wet felt sheets listed below (or their equivalents) around the areas to be brazed to protect the heat
exchanger, pipes, and pipe covers from being damaged from the brazing torch flame.
Recommended felt sheets: Spatter felt 50CF-11 (5t x 1 m x 1 m) by TRUSCO Nakayama
Felt sheets that meet the JIS standard (JIS A 1323 type A "Flame retardant testing method for spark droplets of
welding and gas cutting on fabric sheets in construction works")
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- chapter 8
Removing the rear heat exchanger
(Figure 18)
BS_08_E