Mitsubishi Electric CITY MULTI PUMY-P NKMU Série Manuel D'installation page 9

L1 L2 GR M1 M2 S M1 M2 S
TB3 TB7
A : Power source
B : Transmission line
C : Screw on the electrical
component box
D : Screw on the electrical
component box
(For transmission wires)
1
1. Wiring transmission cables
Kind of remote control cable Shielding wire (2-core) CVVS, CPEVS or MVVS
Cable diameter 0.5 to 1.25 mm
Remarks
■
■
a. Always use shielded wire when making connections between the outdoor unit (OC) and the indoor unit (IC), as well for all OC-OC, and IC-IC wiring intervals.
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 outdoor unit (OC).
f. Connect the terminal S on the terminal block for central control for the power supply unit to the ground terminal (
g. Set the address setting switch as follows.
Range
IC (Main) 01 to 50
IC (Sub) 01 to 50
51 to 100
101 to 150
151 to 200
–
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.
1
+L
1
1
1
calculation of the maximum length and overall length.
2
accessory
(For power supply wires)
accessory
2
2
sequence with the IC (Main)
* The address automatically becomes "100" if it is set as "01 - 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
+L +L and L +L +L +L and L +L +L
2 3 4 1 2 3 5 1 2
and L +L and L +L and L and L +L
3 4 3 5 6 2
, , + ,
2 2 3 4
+L +L +L and L +L +L +L
1 2 3 4 1 2 6
and L +L and L and L
1 3 4 6
and m +m +m and m +m +m +m
1 1 2 3 1 2 3 4
1. Connect the indoor unit transmission line to transmission terminal block (TB3), or
connect the wiring between outdoor units or the wiring with the centralized control
system to the centralized control terminal block (TB7).
When using shielded wiring, connect shield ground of the indoor unit transmission
line to the screw (C or D) and connect shield ground of the line between outdoor
units and the central control system transmission line to the shield (S) terminal of
the centralized control terminal block (TB7) shield (S) terminal. In addition, in the
system should also be connected to the screw (C or D) using attached lead wires.
Pass the power supply and transmission wires through the appropriate knock-out
holes, then remove the knock-out piece from the bottom of the terminal box and
connect the wires.
3. Fix power source wiring to terminal box by using buffer bushing for tensile force
(PG connection or the like).
3. MA Remote control cables
Kind of remote control cable
Cable diameter
2
Outdoor unit controller
Indoor unit controller
Remote controller
Setting Method
2
+L
6 7
2
and L
6 7
2
2
2
7
+L and L
2 6 7
2
2-core cable (unshielded)
0.3 mm 2 (AWG22) to 1.25 mm 2 (AWG16)
Symbol Allowable number of controllers
OC
IC 2 to 12 controllers for 1 OC
RC
Maximum of 12 controllers for 1 OC
MA Maximum of 2 per group
) in the electrical component box.
) should be included in the
8
2
or more)
-