Bryant 580J*04A, Руководство по установке

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36
Clearing Alarms — Once the alarm has been identified and
the cause has been removed (e.g. replaced faulty sensor). the
alarm can be cleared from the display.
To clear an alarm, perform the following:
1. Navigate to the desired alarm.
2. Press the button.
3. ERASE? displays.
4. Press the button.
5. ALARM ERASED displays.
6. Press the (Menu up/Exit) button to complete the action
and return to the previous menu.
NOTE: If the alarm still exists after it is cleared it is redis-
played within 5 seconds.
RTU OPEN CONTROL SYSTEM — The RTU Open
control is factory-mounted in the 580J unit’s main control box,
to the left of the CTB. See Fig. 42. Factory wiring is completed
through harnesses connected to the CTB. Field connections for
RTU Open sensors will be made at the Phoenix connectors on
the RTU Open board. The factory-installed RTU Open con-
trol includes the supply-air temperature (SAT) sensor. The out-
door air temperature (OAT) sensor is included in the FIOP/ac-
cessory EconoMi$er ® 2 package.
The RTU Open controller is an integrated component of the
Bryant rooftop unit. Its internal application programming pro-
vides optimum performance and energy efficiency. RTU Open
enables the unit to run in 100% stand-alone control mode or a
Third Party Building Automation System (BAS). On-board
DIP switches allow selection of a protocol (and baud rate) of
choice among the four most popular protocols in use today:
BACnet*, Modbus†, Johnson N2 and LonWorks** (see
Fig. 43 and 44).
Refer to Table 25, RTU Open Controller Inputs and Outputs
for locations of all connections to the RTU Open board.
The RTU Open controller requires the use of a Bryant space
sensor. A standard thermostat cannot be used with the RTU
Open system.
Fig. 42 — RTU Open Multi-Protocol Control Board
CAUTION
Failure to follow this caution may result in damage to
equipment. Be sure to allow enough time for compressor
startup and shutdown between checkout tests so that you
do not short-cycle the compressors.
J4
J2 J1
J5 J5
J22
J17
J19
J14
J11
J22
J3
J13
J12
J15
J20
Network Comm
Configurable - Input_8
24 V
AC
Configurable - Input_5
24 V
AC
Configurable - Input_3
24 V
AC
Input_9 (Humidistat)
24 V
AC
24 V
AC
Input _8 (Enthalpy)
AO-1 (ECON)
Gnd
(OA
T)
Gnd
(SA
T)
Input_5 (SMK) Input_4
(R)
BO-5
(Y1)
BO-4
(Y2)
BO-3
(W1)
BO-2
(W2)
BO-1
(G)
Gnd Input_3
(X)
24 V
AC IN
+24 VDC
Input_2 (CO2/RH)
Gnd
+24 VDC
Input_1 (CO2/RH)
Gnd
Board Power
(AO-1)
0-10VDC
4-20mA
BO-6
(H) Humidimizer
BO-7
(Reversing Valve/High Speed Fan/Y3)
BO-8
(Power Exhaust)
LonWorks
Option Card
Port
Example set for
BACnet MS/TP
and 76.8K baud
(1, 2, and 4 ON)
Recommended for all
i-Vu Open installations
2 N r o , s u b d o M , t e n C A B ) t u p n i p m e t ( T P S r o t c e l e S l o c o t o r P
(LON connection J15) SPT (common)
SPT (offset input)
*Remove
both for 0-5V
AO-2
GND
(2-10V)
3-Volt
Lithium
Battery
BO-1 BO-2 BO-3 BO-4 BO-5
BO-6
BO-7
BO-8
VFD Output
* BACnet is a registered trademark of ASHRAE (American Society of
Heating, Refrigerating and Air-Conditioning Engineers).
† Modbus is a registered trademark of Schneider Electric.
** LonWorks is a registered trademark of Echelon Corporation.