Mitsubishi Electric PUHY-P250YHM-A, Data Book

Page: 78 / 101

76
The heat exchanger block can be separated from the main body of indoor unit (Brazing is required).
Place the unit on a level surface before separating the unit.
indicates the surface to split up.
The dimensions of the base block after being separated from the heat exchanger block are marked with
✻
in the figure below.
• Instructions for separating the P750, P900-F indoor unit into parts
Heat exchanger
block
Unit weight
PFAV-P750VM-E
Weight
459
800
✻
1750
✻
741
1830
✻
PFAV-P900VM-E-F 437
The heat exchanger block actually cannot be
separated in whole as the figure shows.
Each part needs to be removed to complete the
separation.
1. Take the following steps to separate the heat exchanger from the main unit referring to the figures in the
next page.
a. Remove filter plates
1
(2 screws are attached each) on the right and left side of the heat exchanger
block and take out the filter.
b. Remove air inlet flanges
23
, and then decoration panels
4
through
9
in number order.
c. Cut off the part of the charge pipe connected to the field piping to reduce internal pressure. Then,
debraze the piping part shown in the figure (on the very left in the next page) and disconnect the
thermistor wiring. Thermistors are mounted both on the right and left side of the heat exchanger,
three for each.
✻
Braze pipes under nitrogen purge to avoid oxidation, and keep contaminants and water out of the
pipes.
d. Unscrew the screws of the heat exchanger
10
fixed to the drain pan B
12
and remove the heat
exchanger.
e. Unscrew the screw on the drain pan F
11
. Slightly lift up the drain pan B
12
and remove it from the F
11
.