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Symbol
Allowable number of controllers
Outdoor unit controller
OC
–
Indoor unit controller
IC
PUMY-P100
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PUMY-P125
1 to 10 units per 1 OC
PUMY-P140
1 to 12 units per 1 OC
Remote controller
RC
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Maximum of 12 controllers
for 1 OC
RC
MA
Maximum of 2 per group
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Kind of remote control cable
Shielding wire (2-core) CVVS, CPEVS or MVVS
Cable diameter
0.5 to 1.25 mm
2
Remarks
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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.
b. Use feed wiring to connect terminals M1 and M2 and the ground terminal on the transmission cable terminal block (TB3) of each outdoor 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 outdoor unit (OC).
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f. Connect shield ground of the indoor units transmission line to the shield (S) terminal of (TB3) and also connect (S) terminal to screw
C
or
D
using attached lead wire.
Connect shield ground of the line between outdoor units and the central control system transmission line to the shield (S) terminal of (TB7).
g. Set the address setting switch as follows.
Unit
Range
Setting Method
IC (Main)
01 to 50
Use the most recent address within the same group of indoor units
IC (Sub)
01 to 50
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)
Outdoor Unit
51 to 100
Use the most recent address of all the indoor units plus 50
* The address automatically becomes “100” if it is set as “01 - 50”.
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101 to 150
Set at an IC (Main) address within the same group plus 100
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151 to 200
Set at an IC (Main) address within the same group plus 150
MA R/C
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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.
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maximum length and overall length.
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M1
S
M2
B
A
C
M1
S
M2
L
N
TB3
TB1
TB7
D
3. MA Remote control cables
Kind of remote control cable
Sheathed 2-core cable (unshielded) CVV
Cable diameter
0.3 to 1.25 mm
2
(0.75 to 1.25 mm
2
)*
Remarks
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* Connected with simple remote controller.
A
: Power source
B
: Transmission line
C
: Screw on the electrical component box
D
: Screw on the electrical component box
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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).
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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
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system should also be connected to the screw
C
or
D
using attached lead wire.
2. Conduit mounting plates (ø27) are being provided. 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).
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