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Installation and debugging
(7) for connection between detector and group control bus, not allowed to
connect branch line from the group control bus;
(8) shielding line of communication line between detector and air conditioner
and the shielding line of communication bus between detector and central
controller shall be shorted;
(9) wiring and power distribution line of the group control bus shall not be too
close from each other or in the same wiring channel, and others may refer
to wiring requirements of building autocontrol system;
(10) limit the total length of group control bus to 1000 meters; optional due
to the site operation.
(11) at both ends between Bus A and Bus B connect a metallic membrane
precision resistance of 100ohm respectively;
(12) single point earth for bus shielding line, suggest to be arranged in the middle
of communication bus, close to central controller;
(13) in principle, installation place of central controller shall be arranged in the
middle of communication bus, close to shielding earth line of communi-
cation bus;
(14) unit address codes of central controller adopt the default settings;
(15) central controller has its own power distribution line, the power distribution
line and communication line shall not be too close from each other or in
the same wiring channel, and no other special requirements.
4. Installation and construction of wiring of group control net shall be processed
together with installation and debugging of net air conditioner, pay attention to
commissioning before installation.
5. Connection between detector and air conditioner: detector working mode and
unit address code shall be strictly set according to planned layout; detector
makes wire communication with at most two air conditioners (A, B) through
4-post screw-fixing terminal at air conditioner interface (A
nection between detector and air conditioner use uniform wiring; use uniform
wiring for connection between detector and air conditioner, one plug in type
terminal of wiring connected to long distance control interface on the computer
board of air conditioner, and cores of another terminal respectively connected
to A
and A
(B
and B
+
-
+
connected to A
/B
+
work normally when debugging, then can check and remove malfunction by
changing positive and negative polarity. During debugging also can judge
whether communication interface to air conditioner is normal according to the
running status indicated by operation indicator (green LED).
); connection has polarity, and generally white wire
-
and black/red wire connected to A
+
23
A
, B
, B
); con-
+,
-
+
-
/B
; if detector cannot
-
-
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