SCHEDULE TYPE
PROJECT
ENGINEER
CONTRACTOR
DATE
B SERIES
SUPERSEDES DRAWING NO.
9 - 3 - 20
FD-ACC
3 - 29 - 18
DTS
DAMPER TEST SWITCH
FOR USE WITH ALL SMOKE AND COMBINATION
FIRE/SMOKE DAMPERS
MODEL: DTS
Nailor Industries Inc. reserves the right to change any information concerning product or pricing without notice.
The DTS (Damper Test Switch) is an optional "momentary" push button
test switch available on all Nailor smoke and combination fire/smoke
dampers. The DTS provides the ability to "cycle test" the damper by
pushing and holding down the button until the damper has cycled and
closure has been visually verified, either by inspecting the damper
through the access door or by confirmation at a remote control panel
when equipped with the optional MLS-300 position indicator.
The DTS is mounted right on the damper and enables a single
maintainance person to test and cycle the damper, eliminating the need
for help from another person in the control room.
When a combination fire/smoke damper is ordered, the DTS is combined
with the ERL (Electric Resettable Link), in a common enclosure.
nailo
r.com
Com
bina
tion F
ire &
Sm
oke D
amp
er
ERL
/DTS
Ele
ctric
Res
etta
ble L
ink/
Dam
per T
est S
witc
h
ERL
Rese
t
Temp.
165°
F
212°
F
250°
F
350°
F
ERL/
DTS
12-1
9
DTS
Pus
h
To T
est
Pres
s an
d ho
ld do
wn "
Mom
enta
ry"
push
butt
on u
ntil d
am
per h
as fu
lly
cycle
d. T
he e
lectr
ic re
setta
ble li
nk
is m
anu
al re
set ty
pe.
L2
L1
BLK
BLK
ELECTRIC
ACTUATOR OR
EP SWITCH
WHT
MOUNTED ON DAMPER (FACTORY WIRING TERMINATES AT SPLICE
POINTS INDICATED INSIDE 4" x 4" ELECTRICAL BOX)
HEAT
SENSOR
(ERL)
M
BLK
(BLK)
(RED)
WHT
BLK
BLK
BLK
(BLK)
(RED)
120 VAC. (24 VAC)
PUSH
BUTTON
TEST SWITCH
(DTS)
L2
L1
CLOSED
(RED LIGHT)
OPEN
(GREEN LIGHT)
CONTROL
SWITCH
NORMAL
MS2 DAMPER CLOSED
LOWER MICROSWITCH
MS1 DAMPER OPEN
UPPER MICROSWITCH
CLOSED
REMOTE CONTROL
STATION
(BY OTHERS)
4" x 4" ELECTRICAL BOX
MOUNTED ON DAMPER (FACTORY
WIRING TERMINATES AT SPLICE
POINTS INDICATED)
SMOKE
DETECTOR
(IF USED)
120 VAC. (24 VAC)
ELECTRIC
ACTUATOR OR
EP SWITCH
HEAT
SENSOR
(ERL)
PUSH
BUTTON
TEST
SWITCH
(DTS)
M
BLK
BLK
ELECTRIC
ACTUATOR OR
EP SWITCH
WHT
HEAT
SENSOR
(ERL)
M
BLK
(BLK)
(RED)
PUSH
BUTTON
TEST SWITCH
(DTS)
DTS/ERL with MLS-300 Belimo (actuator aux. switches)
Position Indicator Package
Figure 2.
DTS/ERL Damper Test Switch with Electric
Resettable Link
Figure 1.
CL
CL
OP
OP
WIRING DIAGRAMS:
Model Series
Open (OP)
Closed (CL)
FSTF
Orange / Gray
Violet / Red
FSLF / FSAFA
Gray / Gray
Violet / Violet
FSNF / FSAFB
White S4 / S6
White S1 / S2
Belimo Actuator Aux. Switch Wiring Connections
Page 1 of 2
