Light Commercial Thermostat; Thermostat Inputs; Advisory And Alarms - Emerson E2 Installation And Operation Manual

sor failures.
Device configuration of the CoreSense Communica-
tions can be set at either 9600 or 19200 baud, with either
No parity, or Even parity.
The Copeland CoreSense Communications is sup-
ported on the E2 CX-300, 400, and BX-300, 400.
6.3.9 Light Commercial
Thermostat
The thermostat communicates with the E2 using the
MODBUS network. The Light Commercial Communicat-
ing Thermostat will enable the E2 to read status informa-
tion from the device as well as send operational setpoints
to the device. The thermostat is available on E2 versions
3.02 and above.
6.3.9.1

Thermostat Inputs

The E2 application will provide support for external
real time inputs to the thermostat. These inputs are:
•Zone Temperature
Diagnostic Alarm
Heating Two Hours Thermostat did not see a rise in supply temperature when heating was
called for.
Heat Continuous In heat or backup heat mode, thermostat opens latching relay contacts if
temperature is over 10°F above setpoint.
Temperature Sensor Fail If heating or cooling is engaged, and either the indoor temperature sensor
reading or the supply air temperature sensor reading starts moving the
opposite way faster than it was before the heating or cooling was engaged,
the thermostat reports a diagnostic message, and shuts down the operation.
Stuck Key A stuck key (closed) has been detected on the thermostat.
Unexpected Temperature Thermostat has detected a failure of the internal space temperature sensor,
Rise or the O/B wiring is incorrect.
Cool Eight Hours If cool runs for over 8 hours continuously, the thermostat sets anticipator to
zero until call for cool is satisfied.
Fan Not Detected If the fan is activated and if the Fan Detect input is enabled, the thermostat
checks its status 15 seconds after the fan is energized, and if the fan is not
on, it disables any active heat or cool calls, and reports an alarm.
Frost Protection Activated The thermostat allows a frost protection menu option. When enabled, frost
protection is enabled in all system modes including OFF, when temperature
drops below 42°F (5.5°C). All other heat / cool calls are disabled, and
indoor heat is activated until the temperature rises above the frost protec-
tion threshold.
Table 6-5
-Diagnostic Alarm Outputs
Comfort Alert Codes
The thermostat supports the Emerson Climate Tech-
nologies Comfort Alert system. On any alert present on
Comfort Alert terminal, the thermostat keeps the informa-
tion on the fault available over the network so that the E2
MODBUS
•Minimum Damper Position
•Outside Air Temperature
•Inside Humidity
If these inputs are connected to valid values, they are
sent to the thermostat to be used in place of any locally
connected sensors of the same type. If local sensors are
present and meant to be used, the associated inputs on the
E2 application should be left disconnected.
6.3.9.2

Advisory and Alarms

The Light Commercial Thermostat also supports diag-
nostic functions. When a diagnostic code is sent to the E2
from the thermostat, the E2 application will identify the
code and generate the corresponding advisories in the
advisory log.
Diagnostic Alarms
Each of these configurable diagnostic alarms in the E2
can be set to Disabled, Failure, Alarm, or Notice with an
accompanying priority setting.
The diagnostic alarms supported are:
Descriptions
can access this information. On some specific alerts, it will
discontinue compressor operation if active protection is
enabled.
The Comfort Alert codes are sent separately from the diag-
nostic codes. Just like the diagnostic codes, the Comfort
Alert codes are entered as advisories in the E2 advisory
The RS485 Network and Hardware Setup
E2 Advisory
Heating Problem Detected
Heat Shutdown – Temp too high
Incorrect Sensor Wiring
Stuck Key Detected
Failed Sensor or Bad Wiring
Cooling Problem Detected
Proof Fail
Frost Protection
•
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