Trane TR170 - Main Menu - Application Functions 2 - Group

3.16 Main Menu - Application Functions 2 -
Group 24
3.16.1 24-0* Fire Mode
CAUTION
EQUIPMENT DAMAGE AND PERSONAL INJURY
Non-interruption of the frequency converter due to re
mode operation could cause overpressure and damage
the system and its components, hereunder dampers, and
air ducts. The frequency converter itself could be
damaged and it may cause damage or re.
•
Ensure that the system is properly designed and
components used are carefully selected.
•
Ensure that the ventilation systems working in
life safety applications are approved by the
local re authorities.
Background
Fire mode is for use in critical situations, where it is
imperative for the motor to keep running, regardless of the
frequency converter’s normal protective functions. These
situations could be ventilation fans in tunnels or stairwells
for instance, where continued operation of the fan
facilitates safe evacuation of personnel if there is a re.
Some selections of re mode function cause alarms and
trip conditions to be ignored, enabling the motor to run
without interruption.
Activation
Fire mode is activated only via digital input terminals. See
parameter group 5-1* Digital Inputs.
Messages in display
When re mode is activated, the display shows the status
message Fire Mode.
Once the re mode is deactivated, the status message
disappears.
If an alarm with warranty implications (see
parameter 24-09 FM Alarm Handling) occurs while the
frequency converter is active in re mode, the display
shows the status message Fire Mode Limits Exceeded. Once
this status message appears in the display, it remains until
a power cycle is performed. The frequency converter
automatically logs and stores the condition in the memory
and the warranty is still lost in case the frequency
converter is returned for service.
Digital and relay outputs can be congured for the status
messages Fire Mode Active. See parameter group 5-3* Digital
Outputs and parameter group 5-4* Relays.
Access the status messages Fire Mode and Fire Mode Limits
Exceeded via the extended status word.
Message Type
Keyp
ad
Message
Warning
word 2
Extended
status
word 2
Fire Mode Status + + + (bit 25)
Fire Mode
Limits
Exceeded
Status + + + (bit 27)
Table 3.13 Fire Mode Display Messages
Log
The re mode log shows an overview of events related to
re mode in the re mode log, see also parameter group
18-1* Fire Mode Log.
The log includes up to 10 of the latest events. Fire Mode
Limits Exceeded has a higher priority than Fire Mode Active.
The log cannot be reset.
The following events are logged:
•
Fire mode activated.
•
Fire mode limits exceeded (warranty aecting
alarms).
All other alarms occurring while re mode is active are
logged as usual.
NOTICE
During re mode operation, all stop commands to the
frequency converter are ignored, including coast, coast
inverse, and external interlock.
NOTICE
If setting the command [11] Start Reversing on a digital
input terminal in parameter 5-10 Terminal 18 Digital
Input, the drive understands this command as a
reversing command.
24-00 FM Function
Option: Function:
NOTICE
In re mode, alarms are produced or
ignored in accordance with the selection
in parameter 24-09 FM Alarm Handling.
[0]
*
Disabled Fire mode function is not active.
[1] Enabled-
Run
Forward
In this mode, the motor continues to operate in
a clockwise direction.
[2] Enabled-
Run
Reverse
In this mode, the motor continues to operate in
a counterclockwise direction.
[3] Enabled-
Coast
While this mode is selected, the output is
disabled, and the motor is allowed to coast to
stop. When parameter 24-01 Fire Mode Congu-
ration is set to [3] Closed Loop, this mode
cannot be selected.
Parameters TR150 and TR170
92 02/2017 All rights reserved. BAS-SVP16B-EN
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