Johnson SUIT450YEM Manual De Instrucciones página 35

! NOTICE
1. The refrigerant tube system, indoor unit indoor unit, and indoor unit outdoor unit connecting and signal lines are designed in the same system.
2. All indoor units of a same system must be fed by the uniform power supply.
3. When the power supply line is parallel with the signal line, they must be isolated by cable chutes and spaced in an enough distance. (Power supply
line space: 300mm for 10A below, 500mm for 50A below)
4. When multiple outdoor units are parallel connected, the addresses for outdoor units must be correctly set.
5-6 Signal cable between indoor and outdoor units
1) 2-core shielded cable (≥0.75mm ) shall be used for the signal cable between indoor and outdoor units, the cable must be connected in correct
polarities, and the signal cable between the indoor and outdoor units can be only led out from the master outdoor unit.
Outdoor unit
(master)
(
P Q E
(P Q E)
Indoor-outdoor
signal line
Remark:
Please add a 100Ω resistance between P and Q terminal of the last indoor unit when it is needed
(The communication is not stable or too many indoor units in one system).
5-7 Example for electrical wiring (Power supply 380-415V 3N～ 50Hz)
See Fig.5.7.
Remark:
1.When all the indoor part power consumption is too big , this connection method is not available;
2. When the 3 phase power supply is not stable , this connection method is not allowed;
3. In case of this problem as above , please power indoor and outdoor part individually.
²
Outdoor unit
(slave)
)
(H H E) (H H E)
1 2
Outdoor-outdoor signal line
Indoor unit
(Open)
Fig.5.6 Signal cable between indoor and outdoor units
L L L N
Power supply
1 2 3
L L L N
2 3
1
Outdoor unit(master)
L L L N H H E P Q E
1 2 3
1 2
Shielded line
Indoor unit
L N P Q E
Shielded line
Indoor unit power supply line
Splitter box
Fig.5.7 Example for electrical wiring
Outdoor unit
(slave)
(H H E)
1 2
(Shielded cable connected to "E" on terminal block)
(380-
415 V 3N 50Hz)
Splitter box
Outdoor unit(slave)
L L L N H H E P Q E
1 2 3
1 2
Shielded line
-
Outdoor outdoor signal line
-
Indoor outdoor signal line
Indoor unit
L N P Q E
Splitter box
16
Outdoor unit
(slave)
(H H E)
1 2 1 2
Grouped control
Outdoor unit(slave)
L L L N H H E P Q E
1 2 3
1 2
Shielded line
Indoor unit
L N P Q E
Shielded line
Shielded line
Splitter box
V.2