4
Refrigerant pipe connecting port
(Liquid)
Refrigerant pipe connecting port
(Liquid)
Refrigerant pipe connecting port
(Suction gas)
Refrigerant pipe connecting port
(Discharge gas)
Outdoor unit side
Indoor unit side
Refrigerant pipe connecting port
(Gas)
Hanging bracket
320 (Hanging bolt pitch)
160
250
54
75
(120)
(120)
21
44
87
200
28
56
94
(120)
(120)
67
94
Earth screw
These coils are
on Y1803FE only.
79
109
77
200
68
49
159
31
190
157
39
57
Refrigerant pipe connecting port
(Gas)
Refrigerant pipe connecting port
(Liquid)
Refrigerant pipe connecting port
(Suction gas)
Refrigerant pipe connecting port
(Discharge gas)
Outdoor unit side
Indoor unit side
Refrigerant pipe connecting port
(Liquid)
Hanging bracket
470 (Hanging bolt pitch)
400
Earth screw
(Unit:mm)
English-8
English-7
4
INSTALLATION OF FLOW SELECTOR UNIT
WARNING
Install the unit securely in the place to sufficiently withstand the weight of the unit.
If the foundation is not sturdy enough, the unit may fall and cause personal injury.
Perform a specified installation work to guard against earth quake.
Improper installation may cause the unit to fall.
REQUIREMENT
To prevent damage on the Flow Selector unit or personal injury, follow the instructions below.
• Do not step, or put any heavy object on the packed Flow Selector unit.
• When carrying the Flow Selector unit, hold the two hanging brackets and be careful not to apply excessive force to
the refrigerant pipes.
External view
RBM-Y1123FE, RBM-Y1803FE
RBM-Y2803FE
Installing hanging bolts
• Considering piping and wiring after hanging the Flow Selector
unit, determine the installation position and direction.
• After determining he installation position of the Flow Selector
unit, install the hanging bolts.
• For hanging bolt pitch, see the External view.
• When the ceiling is installed, draw the pipes to the position
where they are to be connected before hanging the unit.
Ceiling preparation
Because ceiling preparation depends on the building structure, consult with the architect or interior finisher.
After removing the ceiling panels, it is important to reinforce the ceiling frames to prevent ceiling panel vibration
and to keep the ceiling horizontal.
Installation of hanging bolts
Use M10 (mm) or W3/8 hanging bolts (2 pcs., to be local procure).
Matching to the existing structure, set pitch according to size in the unit external view as shown below.
Procure hanging bolts and nuts locally for
installing the unit.
Anchor bolt
(Blade type
bracket)
(Slide type
bracket)
(Pipe hanging
anchor bolt)
Reinforcing
steel
Hanging bolt
Hanging bolt
Support angle
Hanging bolt
Nut
Flat washer
M10 (mm) or W3/8
M10 (mm) or W3/8
M10 (mm)
2 pieces
6 pieces
4 pieces
New concrete slab
Install the bolts with insert brackets or anchor bolts.
Steel frame structure
Use existing angles or install new support
angles.
Existing concrete slab
Use a hole-in anchors, hole-in plugs,
or a hole-in bolts.
Installing Flow Selector unit
• Attach the nuts (M10 (mm) or W3/8: to be local procure) and flat washers (M10: to be local procure) to the
hanging bolts.
• Put the washers over and under the T-groove of the hanging brackets of the Flow Selector unit to hang down
the unit.
• Using a level vial, check that the four sides are horizontal. (Horizontal degree: Within 5mm).
REQUIREMENT
Install the Flow Selector unit with the correct direction as shown in the figure.
If installed with incorrect direction, the Flow Selector unit will not operate properly.
Hanging
bolt
Level vial
(Horizontal degree: Within 5 mm)
10 to 15mm
Flow Selector unit
M10 (mm) Flat washer
M10 (mm) Flat washer
To prevent the bolt from
coming off, attach the
washer just under
the hanging bracket as
shown in the figure.
Procure the hanging
bolts, washers, and
nuts locally.
Nut
(M10 (mm) or W3/8)
Nut
(M10 (mm) or W3/8)
Hanging bolt
(M10 (mm) or W3/8)