Mitsubishi Electric PAC-SF46EPA Manuel D'installation page 9

Example for LOSSNAY
Centralized controller
B
Power LOSSNAY
A
supply unit
unit
T T
B B
2 3
Transmission
Booster
LOSSNAY
unit
NOTES:
• If the total length of the remote controller's wiring is less than 10 m (32 ft), use 0.75 mm² (AWG18) cable, and do not add their lengths to the
length calculations made above.
• If the total length of the remote controller's wiring is more than 10 m (32 ft), use 1.25 mm² (AWG16) cable or ø1.2 mm or more shielded cable
for the length of wiring exceeding 10 m (32 ft), and be sure to add their lengths to the length calculations made above.
6 Supply capacity to transmission line
In order to ensure proper communication among Outdoor unit, Indoor unit, LOSSNAY, and OA processing unit GUF-RD(H), and Controllers, the
transmission power situation for the M-NET should be observed. In some cases, Transmission Booster should be used. Taking the power
consumption of Indoor unit sized P20-P140 as 1, the equivalent power consumption or supply of others are listed at Table 6-1 and Table 6-2.
Table 6-1 The equivalent power consumption by Indoor units, LOSSNAY, OA processing units, controllers.
Indoor, OA unit Indoor unit
Sized P20-P140 Sized P200,P250
GUF-50,100
1 7
*RC : Remote Controller
Table 6-2 The equivalent power supply of Transmission Booster, Power supply unit, Connector TB3, TB7 of Outdoor unit.
Transmission Booster
PAC-SF46EPA
25
*If PAC-SC50KUA is used to supply power at TB7 side, no power supply need from Outdoor unit at TB7, Connector TB3 itself will therefore have 32.
With the equivalent power consumption values in Table 6-1 and Table 6-2, PAC-SF46EPA can be designed into the air-conditioner system to ensure
proper system communication according to 6-2-A, B, C.
6-2-A) Firstly, count from TB3 at TB3 side the total quantity of Indoor units, OA process units and ME remote controller, Timers and System
controllers. If the total quantity reaches 40, a PAC-SF46EPA should be set. In this case, Indoor unit sized P200, 250 is counted as 2 Indoor
units, but MA remote controller(s), LOSSNAY is NOT counted.
6-2-B) Secondly, count from TB7 side to TB3 side the total transmission power consumption. If the total power consumption reaches 32, a
PAC-SF46EPA should be set. Yet, if a PAC-SC50KUA is used to supply power at TB7 side, count from TB3 side only.
6-2-C) Thirdly, count from TB7 at TB7 side the total transmission power consumption. If the total power consumption reaches 6, a PAC-SF46EPA
should be set.
D
C
LOSSNAY
unit
LOSSNAY
remote controller
E
LOSSNAY
unit
LOSSNAY
remote controller
BC controller MA RC. LOSSNAY
CMB-P-V-G(A/B) PAR-21MAA
CMB-P-V-F(A/B) PAC-YT51CRA
PAR-FA32MA
LGH-RX-E
2 0
Power supply unit
PAC-SC50KUA
6
Transmission line length limits
(1) Maximum distance between ends should be less than
500 m (1,640 ft).
Ex.) A+B+D+E,
A+B+C+E,
C+D
(2) Maximum distance from power supply should be less
than 200 m (656 ft).
Ex.) B+D, B+C, A, E
LOSSNAY
remote controller
LOSSNAY
remote controller
ME Remote Contr. Timers, System Contr.
PAR-F27MEA PAC-SC30GRA
PAC-SE51CRA PAC-SF44SRA
PZ-52SF PAC-YT34STA
G-50A
1/4 1/2
Outdoor unit
Connector TB3 and TB7 total *
32
ON/OFF Contr.
GB-50A PAC-YT40ANRA
3 1
Outdoor unit
Connector TB7 only
6
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