Rtu Open Control System - Bryant 580J*04A Installation Instructions Manual

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.
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.
3-Volt
Lithium
Battery
LonWorks
Option Card
Port
J15
Example set for
BACnet MS/TP
and 76.8K baud
(1, 2, and 4 ON)
Recommended for all
P o r
i-Vu Open installations
Board Power
J4
BO-1 BO-2
J13
J12
o t c l o S e e l t c r o *Remove
both for 0-5V
SPT (offset input)
Fig. 42 — RTU Open Multi-Protocol Control Board
RTU OPEN CONTROL SYSTEM — The
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
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.
J1
BO-3 BO-4 BO-5
J22
AO-2
BO-6
GND
(2-10V)
BO-7
BO-8
J17
Network Comm
J19
J20
S P T ( e t m p n i p u ) t B A C n
SPT (common) (LON connection J15)
* 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.
36
2 package.
®
(AO-1)
0-10VDC
J3
J2
4-20mA
J5 J5
J22
VFD Output
J11
BO-6
(H) Humidimizer
BO-7
(Reversing Valve/High Speed Fan/Y3)
BO-8
(Power Exhaust)
J14
e , t M o d b u , s r o N 2
RTU Open