Mitsubishi Electric M Series Manual page 580

MULTI SYSTEM Inverter Heat Pump
6. Mounting the Branch Box
( )
A
*
Fig. 6-1
Wall mount
Fig. 6-2
7. Installing refrigerant piping
45°±2°
Flare cutting dimensions
Flare nut tightening torque
Fig. 7-1
Flare cutting dimensions
Table 1
Copper pipe O.D. Flare dimensions
(mm) øA dimensions (mm)
ø6.35 8.7 - 9.1
ø9.52 12.8 - 13.2
ø12.7 16.2 - 16.6
ø15.88 19.3 - 19.7
C-578
(mm) (1) Install the suspension bolts (procure locally) at the specified pitch (Fig. 4-2, 4-3).
K
(2) Fit the washers and nuts (
(3) Hang the unit on the suspension bolts.
(4) Fully tighten the nuts (check ceiling height).
(5) Use a level to adjust the branch box to the horizontal.
Note:
* Refer to "4-1".
* Purchase an appropriate
bracket locally if the unit
is to be mounted on a • Always install the unit horizontally.
wall.
• This unit may be installed suspended from the ceiling.
•
• Incorrect installation may result in the drain overflowing.
Note:
Be sure to mark all the local refrigerant piping (liquid pipes, gas pipes, etc.) for
each indoor unit designating clearly which room it belongs in. (Ex. A, B, C, D, E)
(1) Remove the flared nuts and caps from the branch box.
(2) Flare the ends of the liquid and gas piping, and apply refrigeration oil (procure
(3) Connect the refrigerant piping immediately. Always tighten the flared nuts to the
(4) Press the pipe covers
(5) Press the pipe covers
(6) Apply the supplied bands
(7) If the indoor unit is not connected, fit the supplied pipe covers (with caps,
(8) Clamp the pipe covers (
Table 2
Fig. 7-2
Fig. 7-3
, , procure locally) to the suspension bolts.
(Fig. 6-1)
When unit is hung and nuts tightened.
Suspension bolt
Nuts
Washer (with cushion)
Ensure that cushion faces downwards
Washer (without cushion)
Nut (procure locally)
Suspension bolt
Ensure that this face is always installed upwards.
Ceiling board
Caution:
This unit may only be installed vertically, as shown in the l e f t diagram.
(Side K is facing up.)
K
Connect the liquid and gas pipes of each indoor unit to the same end con-
nection numbers as indicated on the indoor unit flare connection section of
each Branch Box. If connected to wrong end connection numbers, it doesn't
work normally. (Fig. 7-1)
When connecting indoor units, make sure to connect refrigerant pipes and
connection wires to the appropriate connection ports marked with match-
ing alphabets. (Ex. A, B, C, D, E)
List indoor unit model names in the name plate on the control box of Branch
Box (for identification purposes).
To prevent water dripping from the refrigerant piping, install sufficient ther-
mal insulation.
When using commercially available refrigerant piping, ensure that both liq-
uid and gas piping are wrapped with commercially available thermal insula-
tion materials (insulation materials at least 12 mm thick and able to with-
stand temperatures in excess of 100 °C).
Refer to the installation manual of the outdoor unit when creating a vacuum
and opening or closing valves.
locally) to the flared seat.
torque specified in the table below using a torque wrench and double spanner.
and on the liquid piping against the unit and wrap to
hold in place.
and on the gas piping against the unit and wrap to
hold in place.
at a position 10 - 20 mm from each end of the pipe
covers ( ).
) to the branch box refrigerant piping connections to prevent condensation drip-
ping from the pipes.
) in place with the supplied bands
Flare nut tightening torque
Copper pipe O.D. Flare nut O.D.
(mm) (mm)
ø 6 3 . 5
ø 6 3 . 5
ø 9 5 . 2
ø 9 5 . 2
ø 1 2 7 .
ø 1 2 7 .
ø 1 5 8 . 8
ø 1 5 8 . 8
M series
.
Tightening torque
(N·m)*
1 7 1 4 - 1 8
2 2 3 4 - 4 2
2 2 3 4 - 4 2
2 6 4 9 - 6 1
2 6 4 9 - 6 1
2 9 6 8 - 8 2
2 9 6 8 - 8 2
3 6 1 0 0 - 1 2 0
* 1N·m 10 kgf·cm
and