Mitsubishi Electric PFD-P250VM-E, Руководство по обслуживанию, Страница: 259 / 326

[8-12 Parts Replacement Instructions ]
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[Removing the remaining relevant components]
Unscrew the three screws indicated with arrows in Figure 7.
The arrow indicated with dotted lines is located where indicated with an arrow in Figure 7-a. (Accessible from the area where brazed
pipes were removed)
Pull the unscrewed part forward, and unhook the part indicated with Arrow to remove the part from the base of the unit.
*Notes on replacing the control box (when replacing the refrigerant cooling pipes)
Be sure to perform non-oxidized brazing.
Before heating the pipes, wrap the refrigerant circuit components with a wet towel to keep the temperature of the
components from rising above 120°C.
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.
Wet felt sheets listed below (or its equivalent), and place them 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")
[Removing refrigerant cooling pipes]
Remove the braze from the two areas indicated by the arrows in Figure 6-a.
Before removing the pipes, collect the refrigerant.
Protect the surrounding components from the brazing torch flame as necessary.
[Figure 6] [Figure 6-a]
[Figure 7]
[Figure 7-a]
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