D770-44-00
3
I56-2338-004R
W0134-01
figUre 5a. groUnD screW LocaTion:
MOUNTING PLATE
GROUND
SCREW
(GREEN)
W0137-00
figUre 5b. KnocKoUT pLUg removaL:
W0148-01
mechanicaL DeLaY aDjUsTmenT
The pneumatic delay is preset at the factory to 30 seconds. To adjust the set-
ting, turn the adjustment dial clockwise to increase the delay, counterclockwise
to decrease it. The delay is adjustable from 0 to 90 seconds. See
Figure 6
.
NOTE:
Set the delay to the minimum required to prevent false alarms from
flow surges.
After extended service, parts of the detector may become worn, reducing the
delay time and causing false alarms. If this happens, increase the delay. If
the delay is already at the maximum, replace the mechanical delay assembly.
Refer to Maintenance for ordering replacement parts.
figUre 6. DeLaY aDjUsTmenT DiaL:
DELAY
ADJUSTMENT
DIAL
55
70
0
15
45
30
TI
ME
DE
LAY IN SECO
ND
S
NU
MB
ER
ON
DIAL IS APPRO
XIM
AT
E
NOTE: RETARD TIME MAY EXCEED 90 SECONDS. ADJUST
AND VERIFY THAT TIME DOES NOT EXCEED 90 SECONDS.
NUMBER ON DIAL IS APPROXIMATE TIME DELAY IN
SECONDS WITH AN ACCURACY OF +/− 50%.
W0112-02
figUre 4. WfDa Wiring:
TOP VIEW
B-NO
B-NO
COM
COM
B-NO
B-NO
COM
COM
TYPICAL FIRE ALARM CONTROL PANEL CONNECTION
B-NO
COM
A-NC
A-NC
A-NC
A-NC
NC
NO
COM
RED
NC
NO
COM
RED
BLACK
BLUE
BLACK
END-OF-LINE
RESISTOR
WIRE
NUT
WIRE
NUT
NC
NO
COM
BLUE
WIRE
NUT
A-NC
COVER
TAMPER
SWITCH
TO POWER
SOURCE
COMPATIBLE
WITH BELL
LOCAL
BELL
BLACK
RED
BLUE
WIRE CODE:
WATERFLOW OR SUPERVISORY SWITCH:
COM TO B-NO = OPEN CIRCUIT
COM TO A-NC = CLOSED CIRCUIT
(NON-ALARM
CONDITION)
COVER TAMPER SWITCH:
BLACK/BLUE: OPEN
BLACK/RED: CLOSED
(COVER OFF)
TO NONSILENCEABLE
INITIATING ZONE OF
LISTED FACP
NOTE: COMMON AND B-NO
CONNECTIONS WILL CLOSE WHEN VANE
IS DEFLECTED, I.E., WHEN WATER IS
FLOWING. DUAL SWITCHES PERMIT
APPLICATIONS TO BE COMBINED ON A
SINGLE DETECTOR.
NOTE: LOCAL BELL WILL ACTIVATE WHEN COVER IS REMOVED.
TYPICAL LOCAL BELL CONNECTION
BREAK WIRE AS SHOWN FOR
SUPERVISION OF CONNECTION.
DO NOT ALLOW STRIPPED WIRE
LEADS TO EXTEND BEYOND
SWITCH HOUSING. DO NOT
LOOP WIRES.
