Bard MC5000 Series User Manual

Manual 2100-746
Page 32 of 55
Alarm Functionality
All alarms shall have a 5-second delay (alarm criteria
must be met for 5 seconds) prior to triggering alarm
to prevent nuisance alarming. When any alarm is
triggered, the Alarm button on the Home Screen will
blink red, alarm will be listed in Active Alarm screen
until cleared and alarm will be logged in the alarm
log unless otherwise configured via the webpages. The
Alarm Configuration page will allow for users to select
the options Disable, Enable or Output Logic Only. If
Enable is selected, the above description will apply. If
Disable is selected, none of the sequences tied to that
alarm will apply. If Output Logic Only is selected (Dust
and Ventilation only), the output logic will still function
but the alarm will not show under active alarms or be
logged in the alarm log.
Low Temperature Alarm
If the space temperature reading/calculation is
below the Low Temperature alarm set point, a Low
Temperature alarm will be triggered. If controller is
equipped with optional alarm board, the Low Temp
relay will change state. Alarm will clear once space
temperature is above the Low Temperature alarm set
point.
High Temperature 1 Alarm
If the space temperature is above the High Temperature
1 alarm set point, a High Temperature 1 alarm will be
triggered. If controller is equipped with optional alarm
board, the High Temp 1 relay will change state. Alarm
will clear once space temperature is below the High
Temperature 1 alarm set point.
High Temperature Alarm 2
If the space temperature is above the High Temperature
2 alarm set point, a High Temperature 2 alarm will be
triggered. If controller is equipped with optional alarm
board, the High Temp 2 relay will change state. Alarm
will clear once space temperature is below the High
Temperature 2 alarm set point. The “A” terminal will
be energized while this alarm is active.
High Humidity Alarm
If space humidity is above the High Humidity alarm
set point, a High Humidity alarm will be triggered. The
High Humidity alarm will be cleared if space humidity
is below the High Humidity set point. If configured
to do so, the Aux. Out terminal will change state for
economizer disable.
Low Humidity Alarm
If space humidity is below the Low Humidity alarm set
point, a Low Humidity alarm will be triggered. The Low
Humidity alarm will be cleared if space humidity is
above the Low Humidity alarm set point.
Emergency Off Alarm
If Emergency Off input becomes active, an Emergency
Off alarm will be triggered. All outputs to units (W1,
W2, EC, Y1, Y2, G O/B, A, D and H) will be de-
energized. The unit Aux. Out relay will change state. If
controller is equipped with optional alarm board, the
Emergency Off relay will change state. The alarm will
clear once the Emergency Off input becomes inactive.
Once cleared, unit staging will begin as it would at the
beginning of any call if a call is present. The default
configuration for the Emergency Off terminals should
be NC and alarm on loss of continuity/opening of the
contacts.
Generator Run Alarm
If Generator Run input becomes active, a Generator
Run alarm will be triggered. The Generator Run alarm
will clear once the Generator Run input becomes
inactive. If controller is equipped with optional alarm
board, the Generator relay will change state. While
the Generator Run alarm is active only the number
of units set in Max Units in Generator Mode will be
allowed to operate. The count will start with the lead
unit and increment with each additional unit activated
in heating or cooling. The default setting on this
feature is all, which will not limit the number of units
allowed to stage on in heating or cooling during an
active Generator Run alarm. All humidification and
dehumidification will be disabled while Generator Run
Alarm is active due to separate staging sequence from
heating and cooling. If configured to do so, the Aux.
Out terminal will change state.
Ventilation Alarm
If the Vent input becomes active, a Ventilation alarm
will be triggered. During an active Ventilation alarm, the
controller will energize the G and A terminal for every
configured unit and if equipped with an optional alarm
board, the Vent relay will change state. The Ventilation
alarm will clear once the Vent input becomes inactive.
This alarm will have the ability to be configured for
Output Logic Only via the webpages. Output Logic
only will block the logging of the alarm into the alarm
log and prevent alarm from being listed in the Active
Alarms list.
HVAC Power Loss Alarm
If any configured unit fails to provide 24 VAC to
corresponding R terminal, an HVAC Power Loss
alarm will be triggered. This alarm will include a unit
identifier (1-6) tag in the alarm description. While
active, if the controller is equipped with an optional
alarm board, the Power Loss relay associated to the
corresponding unit will change state. The HVAC Power
Loss alarm will clear once 24 VAC is present at the R
terminal corresponding to the unit triggering the alarm.

Bard MC5000 Series Specifications

General

Brand	Bard
Model	MC5000 Series
Category	Controller
Language	English