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Wiring: Fire relay
WARNING: Wait three minutes after disconnecting before servicing!
The fire relay included with the fan is needed only if the fan will be installed in a building that has a fire sprinkler
system. The fire relay integrates the fan with the sprinkler system and shuts down the fan upon receiving an
alarm signal from the system. If the building in which the fan will be installed has a sprinkler system, you must
install the relay according to the instructions below.
A contact closure across the digital input terminals 4 and 13A will result in fan shutdown. The included relay uses
a Normally Open (N.O.) contact as shown below. The relay coil must be energized by the FACP for fan shutdown.
Optionally, the normally closed (N.C.) relay contact can be used. The relay coil must remain energized by the
FACP for fan operation. This would be considered a fail safe or fail open wiring arrangement. Two additional
relay coil leads are provided to facilitate supervision pass-through where required.
Mount the fire relay to the backside of the VFD wiring cover.
ORANGE
BLUE
32
Terminals 4 & 13A for
fire relay
1
2
5
6
25 4 1 1
13A 13B 13C 1 4 30 1 6 1 7
1
2
5
6
25 4 1 1
13A 13B 13C 1 4 30 1 6 1 7
PE
U
V
W
L1
/T1
/T2
/T3
From main FACP or
NAC box (if applicable)
YELLOW
PAM-SD
WHITE
RED
WWW.BIGASSFANS.COM
L1
L2
L2
L3
L3
© 2018 DELTA T LLC
ALL RIGHTS RESERVED.
AUTO
FWD
REV
M
R
An alarm condition will stop the fan
and issue an "F_EF" external fault
on the VFD's display.
Relay Coil/Contact Details
White
(-)
C Blue
(X2)
NC Yellow
Red (X2) (+)
NO Orange
Coil: 20–32 VDC @ 20 mA
RUN
F
STOP
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