Mitsubishi Electric PQRY-P72-96TGMU-A Installation Manual page 13

2 Wiring examples
• Controller name, symbol and allowable number of controllers.
Name Symbol
Heat source unit controller OC
BC Controller (main) BC
BC Controller (sub)
BS
Indoor Unit Controller IC
Remote Controller RC
Example of a group operation system with multiple heat source units (Shielding wires and address setting are
necessary.)
<Examples of transmission cable wiring>
[Fig. 10.3.1] M-NET Remote Controller (P.5)
[Fig. 10.3.2] MA Remote Controller (P.5)
<A> Change the jumper connector from CN41 to CN40.
<B> SW2-1:ON
<C> Keep the jumper connector on CN41.
A Group 1 B Group 4
( ) Address
<Wiring Method and Address Settings>
a. Always use shielded wire when making connections between the heat source unit (OC) and the indoor unit (IC), as well for all OC-OC, and IC-IC wiring intervals.
b. Use feed wiring to connect terminals M1 and M2 and the earth terminal on the transmission cable terminal block (TB3) of each heat source unit (OC) to terminals M1,
M2 and terminal S on the transmission cable block of the indoor unit (IC).
c. Connect terminals 1 (M1) and 2 (M2) on the transmission cable terminal block of the indoor unit (IC) that has the most recent address within the same group to the
terminal block on the remote controller (RC).
d. Connect together terminals M1, M2 and terminal S on the terminal block for central control (TB7) for the heat source unit (OC).
e. On one heat source unit only, change the jumper connector on the control panel from CN41 to CN40.
f. Connect the terminal S on the terminal block for central control (TB7) for the heat source unit (OC) for the unit into which the jumper connector was inserted into CN40
in Step above to the ground terminal
g. Set the address setting switch as follows.
* To set the outdoor unit address to 100, the outdoor address setting switch must be set to 50.
Unit Range
IC (Main) 01 to 50
IC (Sub) 01 to 50
Heat source Unit 51 to 100
BC controller (Main) 51 to 100
BC controller (Sub) 51 to 100
M-NET R/C (Main) 101 to 150
M-NET R/C (Sub) 151 to 200
MA R/C
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.
<Permissible Lengths>
1 M-NET Remote controller
• Max length via outdoor units: L
1
• Max transmission cable length: L
• Remote controller cable length: r
If the length exceeds 10 m [32 ft], use a 1.25 mm
calculation of the 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
•
Allowable number of controllers
One controller for one OC
Zero, one or two controllers for one OC
One to twenty four controllers for one OC
Maximum of two per group
C Group 5
in the electrical component box.
Use the most recent address within the same group of indoor units. With an R2 system with sub BC controllers, set the
indoor unit address in the following order:
1 Indoor units connected to the main BC controller
2 Indoor units connected to BC sub controller 1
3 Indoor units connected to BC sub controller 2
Set the indoor unit addresses so that all the addresses of 1 are smaller than those of 2, and that all the addresses of 2
are smaller than those of 3.
Use an address, other than that of the IC (Main) from among the units within the same group of indoor units. This must be
in sequence with the IC (Main)
Use the most recent address of all the indoor units plus 50
Heat source unit address plus 1. When the set indoor unit address duplicates the address of another indoor unit, set the
new address to a vacant address within the setting range.
Lowest address within the indoor units connected to the BC controller (sub) plus 50
Set at an IC (Main) address within the same group plus 100
Set at an IC (Main) address within the same group plus 150
– Unnecessary address setting (Necessary main/sub setting)
+ L + L + L and L + L + L + L and L
2 3 4 1 2 3 5
and L + L and L + L and L and L
1 3 4 3 5 6
, r , r , r 10 m [32 ft] (0.3 to 1.25 mm
=
1 2 3 4
+ L + L + L and L + L
1 2 3 4 1
and L + L and L and L
1 3 4 6
and c + c + c and c + c + c
1 1 2 3 1 2
+ L + L + L + L
8 1 2 3
2 L + L + L + L + L
8 1 2 3
3 L + L + L + L
=
8 1 2 4
4 L
+ L + L + L , L
6 5 3 4 4
, r
10 m [32 ft] (0.3 to 1.25 mm
=
1 2
If the length exceeds 10 m [32 ft], use 1.25 mm
total extended length and the longest remote length.
D Shielded wire
Setting Method
+ L + L 500 m [1640 ft] (1.25 mm
=
1 2 6
+ L 200 m [656 ft] (1.25 mm 2
=
2 6
2 [AWG22 to 16])
2
[AWG16] shielded wire. The length of this section (L
2
+ L 500 m [1640 ft] (1.25 mm
=
2 6
+ L 200 m [656 ft] (1.25 mm
=
2 6
+ c 200 m [656 ft] (0.3 to 1.25 mm
=
3 4
+ L 200 m [656 ft] (1.25 mm 2 [AWG16])
=
5 6
+ L 200 m [656 ft] (1.25 mm 2 [AWG16])
=
5 7
200 m [656 ft] (1.25 mm 2 [AWG16])
+ L + L + L 200 m [656 ft] (1.25 mm
=
3 5 7
2
[AWG22 to 16])
2 [AWG16] shielded cable and calculate the length of that portion (L
E Sub remote controller
2 [AWG16] or more)
[AWG16] or more)
) should be included in the
8
[AWG16] or more)
2
[AWG16] or more)
2 [AWG22 to 16])
2
[AWG16])
and L ) as within the
4 7
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