Fire Mode - Danfoss VLT FC 102 Programming Manual

Programming Guide | VLT® HVAC Drive FC 102
23-86 CO2 Reduction
Default value: 0 kg
Setup: All setups
Data type: Int32
Shows the CO depletion in kg based on the CO
2
(parameter 23-83 Energy Savings).
Parameter Group 24-** Application Functions 2
6.24
6.24.1

24-0* Fire Mode

PERSONAL INJURY AND EQUIPMENT DAMAGE
The drive is only 1 component of the HVAC system. The correct function of fire mode depends on the correct design and
selection of system components. Ventilation systems working on life safety applications have to be approved by the local fire
authorities. Non-interruption of the drive due to fire mode operation could cause overpressure and damage the HVAC system and
components, including dampers in air ducts. The drive itself could be damaged, and/or cause damage or fire. When the drive has
been programmed for fire mode, Danfoss accepts no responsibility for errors, malfunctions, personal injury, or any damage to the
drive itself or the components herein, HVAC systems and components herein, or other property. Danfoss warranty is only affected
or reduced if a critical alarm occurs during fire mode operation, and the drive is programmed to continue even though the HVAC
system would be damaged eventually.
Ensure that the correct components are selected to ensure that the design is suitable for fire mode.
l
Ensure that the local fire authorities have approved any life safety applications.
l
If critical alarms have been activated during fire mode operation, the drive informs about performance and expected lifetime possibly
being affected (warning 280), and an inspection may be needed to secure maximum operation in a new critical situation.
Background
Fire mode is for use in critical situations where it is imperative for the motor to keep running, regardless of the normal protective
functions of the drive. These situations could be ventilation fans in tunnels or stairwells, for instance, where continued operation of
fans facilitates safe evacuation of personnel and protection of inventory if a fire occurs. Some selections of the fire mode function cause
alarms and trip conditions to be disregarded, enabling the motor to run without interruption.
Activation
Fire mode can be activated via digital input and/or over the fieldbus network. In digital activation, normal or inverse signal levels can
be selected as continual fixed signals or as trigger pulse activation to fit the overall fire control system. It can operate in open loop with
up to 8 different preset speeds or in closed loop with an external signal reference and feedback source. See parameter group 5-1* Digital
Inputs, parameter 24-06 Fire Mode Reference Source, parameter 24-07 Fire Mode Feedback Source, and parameter 24-43 Fire Mode Signal
Operation.
536 | © 2024.10
Parameter type:
Conversion index:
Change during operation:
conversion factor (parameter 23-85 CO2 Conversion Factor) and saved energy
2
CAUTION
Parameter Descriptions
Range, 0 - 0 kg
0
True
AU430028034214en-001901 / 130R0310