Design Technical Manual

Table Of Contents
z
Step 2
One Terminal resistor should be installed on each segment.
B A
F
C D E
L
M
N
KJ
G
I
H
VRF Network
Segment
1
1
1 1
1
1
2
1
1
2
2
2 2 3 2
2 2
3 4
26
45
44
46
3
Transmission line
Signal
Amplier
Segment 1
Segment 2
RB unit
RB unit
Terminal
resistor
Terminal
resistor
Seg 1 Seg 2
The 4th switch in SET5
DipSW of Outdoor unit PCB
(On: Enable, O󰀨: Disable)
Signal amplier PCB
NOTE: It is not necessary to install a terminal resistor between the RB Unit and the indoor unit;
the terminal resistor is built into the RB Unit.
z
Step 3
Conrm proper installation of transmission line.
Conrm transmission line connections to indoor units.
Conrm that there is one terminal resistor on each
each network segment.
Measure the resistance of the signal amplier
terminal and the terminal of the indoor and outdoor
units connected farthest away from the device where
terminal resistor is measured.
A value from the table is displayed, depending on
the distance from the signal amplier and the device
where the terminal resistor is set.
This value is an estimate.
Distance from termination resistor ft. (m)
Approximate resistance
(Ω)
0 ~ 50
A short circuit somewhere or 2 or
more termination resistors are connected
50
60
70
80
90
100
110
120
130
140
150
160
170
180
190 ~ Faulty contact or wiring length over 1614 (500)
1K ~
Faulty contact, open circuit, or no
termination resistor
(0 ~ 100) ( ~ 200) ( ~ 300) ( ~ 400) ( ~ 500)
0 ~ 328 ~ 656 ~ 984 ~ 1312 ~ 1640
- (06 - 115) -
SYSTEM
DESIGN
SYSTEM
DESIGN