Outdoor Air Enthalpy Control; Differential Enthalpy Control - Bryant 580J Series Installation Instructions Manual

If this LED is on...
Power
Rx
Tx
DO#
The Run and Error LED's indicate control module and network status
If Run LED shows...
2 flashes per second
2 flashes per second
2 flashes per second
2 flashes per second
2 flashes per second
5 flashes per second
5 flashes per second
7 flashes per second
14 flashes per second
On

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.)
Enthalpy
Switch
24V RED
GND BLK
LOW GRA
Factory Wiring Harness
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.
Table 6 – LEDs
The LED's on the RTU Open show the status of certain functions
Status is...
The RTU Open has power
The RTU Open is receiving data from the network segment
The RTU Open is transmitting data over the network segment
The digital output is active
And Error LED shows...
Off
2 flashes, alternating with Run LED
3 flashes, then off
4 flashes, then pause
On
On
Off
7 flashes per second, alternating with Run LED
14 flashes per second, alternating with Run LED
On
PL6-1 (24-V)
PL6-4 (COM)
CTB ECON
7
(RTU Open: to J2-6)
C11169
Status is...
Normal
Five minute auto--- restart delay after system error
Control module has just been formatted
Two or more devices on this network have the same
MSTP network address
Exec halted after frequent system errors or control pro-
grams halted
Exec start--- up aborted, Boot is running
Firmware transfer in progress, Boot is running
Ten second recovery period after brownout
Brownout
Failure. Try the following solutions:
--- Turn the RTU Open off, then on.
--- Format the RTU Open.
--- Download memory to the RTU Open.
--- Replace the RTU Open.
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.
24V
– 4-20
Main
GND
+ VDC
Out
LOW
Outside Air
Enthalpy Switch
+ 24-36
VDC In
– 4-20 Main
Out
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.
38
RED PL6-1 (24-V)
BLK PL6-4 (COM)
CTB ECON
GRA 7
(RTU Open: to J2-6)
Return Air
Enthalpy
Sensor
C11170