16
GB
10. Separating the top and bottom of the 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.10.0.1].
• 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.10.0.1].
• 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, clamp, and linear expansion valve as shown in [Fig.10.0.2].
• 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.10.0.3].
* 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
1
that are marked with the letter A in
[Fig.10.0.1] (on four corners) Loosen bolt
2
loose enough to allow the top
and the bottom of the unit to be separated. Be sure to re-tighten bolt
2
after
separating the top and bottom (Tightening torque: 74N·m).
Separation work is now complete. Exercise caution not to damage or scratch the
unit during transportation or get your fingers caught between the units.
[Fig. 10.0.1] (P.7)
<A> Model 250
<B> Model 500
A
Filters (2)
B
Filter cover
C
Side panel: 14 screws
D
Front panel: 6 screws
E
Front panel: 2 chains
F
Rear panel: 9 screws
G
Rear panel: 8 screws
H
Filters (3)
I
Rear panel: 7 screws on each
J
Front panel: 2 hinges on each
K
Bolt
1
L
Bolt
2
M
Screw
<Dimensions and weight of parts>
Height (mm)
Width (mm)
Depth (mm)
Weight (kg)
Heat exchanger
unit (top)
1120+510
*1
P250:1380
P500:1980
780
P250:158
P500:246
Fan unit
(bottom)
860
P250:1380
P500:1980
780
P250:128.5
P500:159
Decoration
panel
—
—
—
P250:93.5
P500:115
* Length of protruded pipe (removable)
[Fig. 10.0.2] (P.7)
<A> Model 250
<B> Model 500
A
Linear expansion valve wiring
B
Clamp
C
Remote controller wiring
D
Lamp wiring
E
Thermistor wiring Float switch wiring
[Fig. 10.0.3] (P.8)
<A> Model 250
<B> Model 500
A
Heat exchanger (liquid pipe)
B
Heat exchanger (gas pipe)
C
Drain pan
D
Unbraze this section (1 place on the liquid pipe/upper part of the strainer)
E
Unbraze these sections (2 places on the gas pipe/expanded part)
F
Unbraze these sections (2 places on the liquid pipe/upper part of the strainer)
Note
1. Peel off the pipe cover carefully. The cover will be needed again when
putting the units together.
2. When loading the unit on an elevator, place the separated sections up-
right as shown below. (Place the right side up.) Place a piece of wood
at the bottom of the bottom section for support to keep it level.
[Fig. 10.0.4] (P.8)
<A> Model 250
<B> Model 500
A
Control box
B
Motor
C
Fan
D
Supporting wood piece
E
Bottom section of the unit
F
Heat exchanger
G
Piping side
H
Top section of the unit
To put the top and bottom sections of the unit together, follow the procedures
above in the reverse order.
• Check to make sure that the frame is perpendicular to the horizontal plane
before putting the panels together.
• When the frames will not fit back into place, loosen bolt
2
as shown in
[Fig.10.0.1], place the frames, and tighten bolt
2
.
• Be sure to securely tighten all screws and bolts. (tightening torque: 74N·m)
• Using [Fig.10.0.5] and Table 1 as a reference, connect all connectors cor
-
rectly. Use a cable tie and bundle the wires as they were before.
• Keep torch flame away from the insulation material on the drain pan and from
other flammable materials when performing brazing work. Use the shielding
board that is supplied.
• If the front panels are not even when they are attached to the unit and are
closed, adjust the panels to make them even (applicable to Model 500 only).
• Perform a test run and check for abnormal sound, rattling, and water leaks.
[Fig. 10.0.5] (P.8)
<A> Model 250
<B> Model 500
A
CN60
B
CN31
C
CN20
D
CN21
E
CN29
F
CN22
G
Connector location on the board
H
LEV2B
I
LEV2A
J
Connector location on the adapter board
Caution:
• Use a hand-lift truck to transport the units; they are heavy even when
the top and button sections are separated.
- Carrying the units by hand is dangerous and may result in personal injury
if the units fall or topple over.
• Exercise caution not to get your fingers caught when separating or as-
sembling the top and bottom sections of the unit.
