Bryant 580J Series User Manual

38
Table 6 – LEDs
The LED’s on the RTU Open show the status of certain functions
If this LED is on... Status is...
Power The RTU Open has power
Rx The RTU Open is receiving data from the network segment
Tx The RTU Open is transmitting data over the network segment
DO# The digital output is active
The Run and Error LED’s indicate control module and network status
If Run LED shows... And Error LED shows... Status is...
2 flashes per second Off Normal
2 flashes per second 2 flashes, alternating with Run LED Five minute auto---restart delay after system error
2 flashes per second 3flashes,thenoff Control module has just been formatted
2 flashes per second 4 flashes, then pause Two or more devices on this network have the same
MSTP network address
2 flashes per second On Exec halted after frequent system errors or control pro-
grams halted
5 flashes per second On Exec start---up aborted, Boot is running
5 flashes per second Off Firmware transfer in progress, Boot is running
7 flashes per second 7 flashes per second, alternating with Run LED Ten second recovery period after brownout
14 flashes per second 14 flashes per second, alternating with Run LED Brownout
On On Failure. Try the following solutions:
--- Turn the RTU Open off, then on.
--- F o r m a t t h e R T U O p e n .
--- Download memory to the RTU Open.
--- Replace the RTU O pen.
Outdoor Air Enthalpy Control
(PNO 33CSENTHSW)
The enthalpy control (33CSENTHSW) is available as a
field--installed accessory to be used with the EconoMi$er2
damper system. The outdoor air enthalpy sensor is part of
the enthalpy control. (The separate field--installed accessory
return air enthalpy sensor (33CSENTSEN) is required for
differential enthalpy control. See Fig. 56.)
7
CTB ECON
(RTU Open: to J2-6)
LOW
GND
24V
Enthalpy
Switch
GRA
BLK
RED
Factory Wiring Harness
PL6-1 (24-V)
PL6-4 (COM)
C11169
Fig. 56 -- Enthalpy Switch (33CSENTHSW) Connections
Locate the enthalpy control in the economizer next to the
Actuator Motor. Locate two GRA leads in the factory
harness and connect the gray lead labeled “ESL” to the
terminal labeled “LOW”. See Fig. 56. Connect the enthalpy
control power input terminals to economizer actuator power
leads RED (connect to 24V) and BLK (connect to GND).
The outdoor enthalpy changeover setpoint is set at the
enthalpy controller.
Differential Enthalpy Control —
Differential enthalpy control is provided by sensing and
comparing the outside air and return air enthalpy
conditions. Install the outdoor air enthalpy control as
described above. Add and install a return air enthalpy
sensor. See Fig. 57.
GRA
BLK
RED
– 4-20
Main
+ VDC
Out
– 4-20 Main
Out
+ 24-36
VDC In
LOW
GND
24V
7
CTB ECON
(RTU Open: to J2-6)
PL6-1 (24-V)
PL6-4 (COM)
Outside Air
Enthalpy Switch
Return Air
Enthalpy
Sensor
C11170
Fig. 57 -- Outside & Return Air Enthalpy Sensor Wiring
To wire the return air enthalpy sensor, perform the
following:
1. Use a 2--conductor, 18 or 20 AWG, twisted pair cable to
connect the return air enthalpy sensor to the enthalpy
controller.
2. Connect the field--supplied RED wire to (+) spade con-
nector on the return air enthalpy sensor and the (+) ter-
minal on the enthalpy controller. Connect the BLK wire
to (--) spade connector on the return air enthalpy sensor
and the (--) terminal on the enthalpy controller.
580J-- 17-- 30--V

Bryant 580J Series Specifications

General

Brand	Bryant
Model	580J Series
Category	Air Conditioner
Language	English