©2014 4Front
®
Engineered Solutions, Inc.
May 2014
6015653B — HVLS Fans
25
This fan includes a fire alarm jumper for a building fire control
systems option that allows the fan to be shut-down by the fire
control system in case of a fire emergency.
note:
Ensure that the fire alarm jumper is in place or the building
fire control system is connected and jumper removed.
1. The normally closed (NC) contacts must be dry contacts.
They open in the event of an active fire alarm.
2. The fire control system fan shutdown option is not enabled
when shipped. To enable the fire control system fan
shutdown option, remove the jumper between enable (EN)
and (24) and replace with a set of dry, normally closed
contacts. See schematics for optional Fire Control Panels
on pages 26 and 27.
3. To test the fire control system fan shutdown operation
remove the wire from the NC contact at the building fire
control panel. The fan should coast to a stop. See Fig.
28.
If the jumper is left installed the fan will not shut down
due to fire control system contacts.
Fire controL SySteM Fan SHUtdown — oPtionaL
FA jumper
(remove to
tie in fire
control system
fan shutoff)
PCB
(mounted in enclosure)
Customer supplied fire
alarm dry contacts NC
(contacts open on alarm)
Fig. 28