Wiring Of Main Power Supply And Equipment Capacity - Mitsubishi Electric PUHY-P-YEM-A Series Installation Manual

Unit
IC (Main)
IC (Sub)
Outdoor Unit
(Variable capacity unit)
Outdoor Unit
(Constant capacity unit)
BC controller (Master) (*2)
BC controller (Slave) (*1)
M-NET R/C (Main)
M-NET R/C (Sub)
MA R/C
*1: Case of BIG-R2 series, *2: Case of R2/WR2/BIG-R2 series
h. The group setting operations among the multiple indoor units is done by the remote controller (RC) after the electrical power has been turned on.
i. When using a transmission booster (RP)
• Let the number of indoor units and remote control units connected be within the limit for the number of units shown in the following table for the total number of units
connected between the outdoor unit (OC) and the transmission booster (RP) N
• Connect the power supply ground to the transmission booster (RP) securely.
Connect the transmission lines of the outdoor unit side to terminals A and B of transmission line terminal block 1 (TB2) of the transmission booster (RP).
Connect the transmission lines of the expansion indoor unit side to terminals A and B of the of transmission line terminal block 2 (TB3) of the transmission booster (RP).
(*1)
Capability of the
connected indoor units
No OS
200 or lower
One OS
No OS
200 or higher
One OS
*1 If even one unit that is higher than 200 exists in the cooling system, the maximum capacity will be "200 or higher".
<Branch Setting> *Case of R2/WR2/BIG-R2 series
Set the indoor unit branch No. switch to the branch No. of the BC controller connecting the piping and that indoor unit.
When using two or more branches, set the lowest branch No.
The indoor unit capacity that can be connected per branch is P80 or less and the number of connectable units is 3.
<Permissible Lengths>
1 M-NET Remote controller
• Max length via outdoor units: L +L
1
• Max transmission cable length: L
• Remote controller cable length: r
If the length exceeds 10 m, use a 1.25 mm
maximum length and overall length.
2 MA Remote controller
• Max length via outdoor unit (M-NET cable): L
• Max transmission cable length (M-NET cable): L
• Remote controller cable length: c
3 Transmission booster
• Max transmission cable length (M-NET cable): 1 L
• Remote controller cable length: r

10.4. Wiring of main power supply and equipment capacity

Schematic Drawing of Wiring (Example)
[Fig. 10.4.1] (P.9)
A Switch (Breakers for wiring)
D Outdoor unit (Variable capacity unit)
G Pull box
Å Å Å Å Å Note:
1. The transmission booster may be required according to the number of indoor units connected.
2. For switch capacity, see the installation manual for transmission booster.
20
Range
Use the most recent address within the same group of indoor units. Make the indoor units address connected to the
01 to 50
BC controller (Slave) larger than the indoor units address connected to the BC controller (Master) (*1)
Use an address, other than that of the IC (Main) from among the units within the same group of indoor units. This must
01 to 50
be in sequence with the IC (Main)
51 to 100 Use the most recent address of all the indoor units plus 50
51 to 100 Variable capacity unit address plus 1
Outdoor unit address plus 1. When the set indoor unit address duplicates the address of another indoor unit, set the
51 to 100
new address to a vacant address within the setting range.
51 to 100 Lowest address within the indoor units connected to the BC controller (slave) plus 50
101 to 150 Set at an IC (Main) address within the same group plus 100
151 to 200 Set at an IC (Main) address within the same group plus 150
– Unnecessary address setting (Necessary main/sub setting)
Number of connected indoor units that can be
connected without a RP
The number of indoor units and the total number of remote controllers is displayed within the parenthesis ( ).
+L +L and L +L +L +L and L +L
2 3 4 1 2 3 5 1
and L +L and L +L and L and L
1 3 4 3 5 6 2
, r , r , r 10 m (0.3 to 1.25 mm
=
1 2 3 4
+L +L +L and L +L +L
1 2 3 4 1 2
and L +L and L and L
1 3 4 6
and c +c +c and c +c +c +c
1 1 2 3 1 2 3
+L +L +L +L 200 m (1.25 mm
=
1 2 3 5 6
2 L
+L +L +L +L = 200 m (1.25 mm
1 2 3 5 7
3 L
+L +L 200 m (1.25 mm
=
1 2 4
4 L
+L +L +L , L +L
6 5 3 4 4 3
, r 10 m (0.3 to 1.25 mm 2 )
=
1 2
If the length exceeds 10 m, use 1.25 mm
length and the longest remote length.
B Breakers for current leakage
E Outdoor unit (Constant capacity unit)
H Transmission booster
Setting Method
and the number of units connected after the transmission booster (RP) N
1
Remote controller type
2
+L +L 500 m (1.25 mm or more)
=
2 6 7
2
+L and L 200 m (1.25 mm or more)
=
6 7
2 )
2
shielded wire. The length of this section (L
2
+L 500 m (1.25 mm or more)
=
6 7
+L and L 200 m (1.25 mm 2 or more)
=
2 6 7
200 m (0.3 to 1.25 mm 2 )
=
4
2 )
2
)
2
)
2
+L +L 200 m (1.25 mm )
=
5 7
2 shielded cable and calculate the length of that portion (L
Remote controller
MA R/C M-NET R/C
32 20 (40)
26 16 (32)
) should be included in the calculation of the
8
and L ) as within the total extended
4 7
C Outdoor unit
F Indoor unit
.
2