Mitsubishi Electric CITY MULTI CMB-P-NU-J2 Manuel D'installation page 5

3.3. Securing installation and service
space
1. For hanging from the ceiling
(This is a reference view showing the least installation space.)
[Fig. 3.3.1]
<Top view>
A
450 (17-3/4)
C
B
D
INDOOR UNIT SIDE
D A
<Front view>
B
A Inspection hole
C Control box
*1 Dimensions with which pipe connection can be handled at site
Model name A
CMB-P104NU-J2
596
CMB-P106NU-J2
[23-1/2]
CMB-P108NU-J2
911
CMB-P1012NU-J2
[35-7/8]
1135
CMB-P1016NU-J2
[44-11/16]
911
CMB-P108NU-JA2
[35-7/8]
CMB-P1012NU-JA2
1135
CMB-P1016NU-JA2
[44-11/16]
CMB-P1016NU-KA2
CMB-P104NU-KB2 596
CMB-P108NU-KB2 [23-1/2]
3.4. Checking the installation site
Check that the difference of elevation between indoor and outdoor units and the
length of refrigerant piping are within the following limitations.
1. CMB-P104, 106, 108, 1012, 1016NU-J2 (In the case the outdoor unit
is 12.5-hp (P120 model) or below, and 16 or fewer ports are used.)
CMB-P108, 1012, 1016NU-JA2, CMB-P1016NU-KA2 (When no Sub BC
controller is connected)
[Fig. 3.4.1]
Unit 1
Ⓐ
A
A
a
Ⓓ
(Unit: mm [in])
E B
B On the side of outdoor unit piping
D On the side of indoor unit piping
B C D
398
[15-11/16] [2-7/8]
250
-
[9-7/8]
[9-1/8]
[13-9/16]
545
[21-1/2]
[9-1/8]
250 300
[9-7/8] [11-13/16]
[13-9/16]
398 250
-
[15-11/16] [9-7/8] [2-7/8]
Ⓑ
Ⓕ
Ⓓ
b
a
b
d
d
Ⓖ
B
B
c
c
Ⓔ
Ⓓ
Ⓗ
A Outdoor unit (Heat source unit)
C BC controller (Sub)
E Indoor unit (Total capacity of downstream indoor unit: 72 to 96)
F Twinning pipe (Model name: CMY-R160-J1)
G 2-Branch Joint Pipe
H Up to three units for 1 branch hole
Total capacity: 30 or below. (but same in cooling/heating mode)
Total piping length
Longest piping length
Between outdoor (heat source) unit
and BC controller
Between indoor units and BC controller
Between indoor
and outdoor
(heat source)
units
Between indoor units and BC controller "h1"
Between indoor units
Notes:
Refer to "Restrictions on piping length" on P. 8.
*1
*2 Refer to the graph "Distance between main BC controller and farthest
indoor unit (direct connection)". (However, when P72 or P96 model of
indoor unit is connected, the maximum allowable distance between
BC controller and farthest indoor unit is 40 m [131 ft].)
E
*3 The values in the parentheses show the maximum piping length to
73
be followed when the connection capacity of the indoor unit is 72 or
more.
231
*4 In the system to which indoor units of the P72 model or above are
connected, neither a branch joint nor a branch header may be used.
343
Do not connect the P72 or P96 models of indoor units and other
*5
models of indoor units at the same port.
231
*6
Indoor units that are connected to the same branch joint cannot be
simultaneously operated in different operation modes.
343
*7 When connecting multiple indoor units to one branch port, those
indoor units must be installed in the same room.
73
*8 For connecting 6 to 18 model indoor units
Have pipe expansion of indoor unit connecting port by cutting the piping at
the cutting point which depends on the indoor unit capacity.
Distance between main BC controller and farthest indoor unit (direct connection)
70 [229]
60 [196]
50 [164]
40 [131]
30 [98]
20 [65]
10 [32]
0
0
Height difference between BC controller and farthest indoor
unit (m [ft])
B BC controller (Main)
D Indoor unit
Item Piping portion
"A+B+a+b
+c+d"
"A+B+c"
"A"
"a" or "b" or
"B+c" or "B+d"
Above outdoor
"H"
(heat source) unit
Below outdoor
"H1"
(heat source) unit
"h2"
5 [16] 10 [32]
(Unit: m [ft])
Allowable value
Not to exceed
the maximum
refrigerant piping
length *1
165 [541] or less
(Equivalent length
of 190 [623] or less)
110 [360] or less
60 [196] or less *2
50 [164] or less
40 [131]or less
15 [49] or less
(10 [32] or less *3)
30 [98] or less
(20 [65] or less *3)
15 [49]
5