Procedure Of Separating The Indoor Unit - Mitsubishi Electric PUHY-P250YNW-A Service Handbook

[3-6 Procedure of Separating the Indoor Unit ]

3-6

Procedure of Separating the Indoor Unit

The top and the bottom of the unit can be separated. (Requires brazing)
When separating the top and the bottom of the unit, perform the work on a level surface.
Follow the procedures below when separating the sections.
Necessary tools and materials:
Ratchet wrench with a socket size of 17 mm (for M10)
General tools
Cable ties (for wires)
Gray vinyl tape (for pipes)
Supporting wood piece Height 800 mm x width 100 mm x thickness 20 (mm) 1 piece
(1) Removing the decoration panel and filter
<Model 250>
Remove the front panels (2), rear panels (2), and the side panels (2) in this order by removing the hinges and the screws on the unit as shown in [Fig.1].
Open the filter cover and remove the filters (2 filters).
<Model 500>
Remove the front panels (4), rear panels (3), and the side panels (2) in this order by removing the hinges and screws on the unit as shown in [Fig.1].
Open the filter cover and remove the filters (3 filters).
(2) Disconnecting the electric wires
Disconnect the wiring connectors from the remote controller, thermistor, float switch, lamp , and linear expansion valve as shown in [Fig.2].
After removing the connectors, pull out the wires from the control box.
Unclamp the wires from the frame.
Put all wires together in a bundle on the unit.
(3) Removing the drain hose and the pipes from the brazed section of the pipe
Remove the drain hose by unscrewing the screws on both ends of the hose band.
Peel off the pipe cover on the pipe so that the torch flame will not reach the cover. Remove the pipe from the brazed section as shown in [Fig.3].
*Protect the section around the area to be worked on from the torch flame (drain pan, wiring, insulation material on the frame etc).
(4) Separate the top and the bottom of the unit
Unscrew the screws and loosen bolt
Loosen bolt 2 loose enough to allow the top and the bottom of the unit to be separated. Be sure to re-tighten bolt
and bottom (Tightening torque:
Separation work is now complete. Exercise caution not to damage or scratch the unit during transportation or get your fingers caught between the units.
< Model 250 >
Filters (2)
Filter cover
Side panel: 14 screws
Front panel: 6 screws
Front panel:
2 chains
Detailed vie w of section A
Screw
16
- chapter 3
1 that are marked with the letter A in
74N . m).
Rear panel: 9 screws
Side panel: 14 screws
Rear panel: 8 screws
A
(on four corners)
1
Bolt
<Dimensions and weight of parts>
Screw
Bolt 2
Pull these pins up and down respectively
to remove the front panel.
[Fig.1] (on f our corners)
< Model 500 >
Filters (3)
Side panel:
14 screws
Front panel:
2 hinges on each
Height (mm) Width (mm)
Heat exchanger 1120+510 P250:1380
unit (top) *1 P500:1980
Fan unit P250:1380
860
(bottom) P500:1980
* Length of protruded pipe (removable)
after sepa rating the top
2
Rear panel: 7 screws on each
Filter cover
Rear panel: 8 screws
A Side panel: 14 screws
(on four corners)
[Fig.1]
Depth (mm) Weight (kg)
P250:158
780
P500:246
P250:128.5
780
P500:159
BS_03_C