19
EXHAUST FAN OPERATION
Up to two exhaust fans can be connected to the economizer
controller.
• If Exhaust Fan 1 is connected and configured, then
Exhaust Fan 1 parameter group (L, M and H) is available
depending on fan configuration.
• If Exhaust Fan 2 is connected and configured, then
Exhaust Fan 2 parameter group (L, M and H) is available
depending on fan configuration.
• The controller energizes Exhaust Fan Relay 1 and Exhaust
Fan Relay 2 if the damper position reaches Exhaust Fan 1
parameter setting and Exhaust Fan Relay 2 parameter set-
ting respectively. The selection of L, M or H matches the
current fan speed.
NOTE: If terminal ACT-FB is configured, then the damper posi-
tion is the damper feedback position. If feedback signal is unavail-
able, then it is the simulated position.
OCCUPANCY INPUT
The economizer controller can receive an occupancy signal from
the connected thermostat or work under Occupied mode all the
time. This is configurable in the Thermostat setup from Climatix
™
mobile application or under the menu of I/O Configuration on the
inbuilt display. See
“Parameter Settings — I/O Configurations” on
page 27 for more information.
PRE-OCCUPANCY PURGE
The Pre-Occupancy purge demand comes from the configura-
tion of the Auxiliary features in Climatix
™
mobile application
or 6AUX2-I under the menu of I/O Configuration on the in
-
built display.
During pre-occupancy purge on the call of heating or when there
is no cooling/heating demand, the damper position is MIN POS.
During pre-occupancy purge on the call of cooling, the damper
position is MIN POS if outside air is not suitable for economiz-
ing. If outside air is suitable for economizing, then the damper
is fully open.
AIRFLOW COMMISSIONING
Airflow measurement station (differential pressure signal) can
connect to the controller temporarily to run airflow commission
-
ing to calculate, calibrate, and store four fan speed characteristic
curves automatically at damper positions 40%, 60%, 80% and
100%. The controller places the damper to a proper position to
meet minimum or any other airflow requests in cfm. Users can
enable this function only from the Climatix
™
mobile application if
the related function is available in the current mobile application
version.
FAULT DETECTION AND DIAGNOSTICS
The economizer controller can detect and diagnose free cooling
faults, sensor operation faults, and damper modulating faults. It
can also report anti-freeze and shutdown notifications and actuator
errors. Following is a list of all detectable or reportable informa
-
tion:
• Sensor disconnected or has no signal.
• Sensor short or high signal (under range or over range).
• Not economizing.
• Unexpected economizing.
• Excess outdoor air.
• Damper not modulating.
• Input power monitor and brownout. After detecting
brownout, the economizer controller enters the brownout
protection mode and disables all of the relay outputs.
• Anti-freeze notifications.
• Shutdown notifications.
• Actuator errors.
• Leaving air temperature is too low or too high.
• Cooling/heating error.
• Damper actuator cycle count. Parameter 1ACT CNT indi-
cates number of times actuator has cycled. It is resettable
via HMI item 8ACT CNT RESET.
FIRMWARE UPDATE
NOTE: Back up configurations before firmware update. All the
previous configuration data are erased after firmware update.
NOTE: Contact Application Engineering for more information on
support for firmware.
IMPORTANT: On the call of cooling when the controller is con-
figured to receive signal from the thermostat but the thermostat
is working under the Unoccupied mode, the damper is fully
closed if outside air is not suitable for economizing. If outside air
is suitable for economizing, then the damper is fully open.
IMPORTANT: The first six faults are detectable via LEDs or
alarm reports on the LCD. See LED Indication on page 15
and Alarms on page 28 for fault indications. These faults can
also be displayed in the Operating section of the Climatix
™
mobile application.
IMPORTANT: If the controller enters the configuration state for
the convenience of I/O configurations, then users can manually
switch to the running state after finishing configurations. To do
so, press Enter + Up at the same time, and then press Enter to
confirm the switch after 8RUN STATE appears on the LCD.
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