Edwards Signaling 439D User Manual
Installation Instructions for Catalog Series 439D
Fire Alarm Bell
Description and Operation
The Edwards 439D series models are heavy-duty, dc powered, vibrating fire bells. They are designed for public
mode signaling in accordance with the latest edition of
NFPA 72. These vibrating bells produce a long, continuous ringing sound. See table below for electrical specifications.
Catalog Size
Number (in.) Voltage Amps
439D-6AW-R 6 20/24V DC 0.085
439DG-6AW
439D-8AW-R 8
439D-10AW-R 10
439DG-10AW
Installation
CAUTION
Do not apply power to bell until installation has been
completed.
Prior to starting installation, refer to Figure 1 for bell size.
The metal mounting plate supplied with these bells mounts
directly on the surface of any single or double gang 3"
octagon box, 4" octagon box or 4" square wall box or
their plaster cover (boxes and covers supplied by others).
For outdoor mounting, use Cat. No. 449 weatherproof box
(ordered separately) as shown in Figure 1.
Wall Box Mounting (Figure 3)
1. Remove screw and lockwasher from front of gong and
remove gong. Retain hardware and gong.
2. Pull bell lead wires through hole in insulator
(Figure 2).
3. Feed the power source wiring from electrical outlet
box through the metal mounting plate. Ensure that
the mounting plate is aligned with the word "TOP" at
the top and facing out and secure metal mounting
plate to electrical outlet box with appropriate
hardware (not supplied).
6. Align the tabs on the back of the gong with the grooves
in the bell body and secure with the screw and
lockwasher removed in step 1.
Surface Mounting (Figure 4)
1. Remove screw and lockwasher from front of gong and
remove gong. Retain hardware and gong.
2. Cut bell wire leads as needed and strip wire leads back
1/4".
3. Ensure that the mounting plate is aligned with the
word "TOP" at the top and facing out and secure metal
mounting plate to surface using screws appropriate
for the mounting surface (not supplied). Place
insulator over studs on mounting plate (Figure 2).
CAUTION
Break wire run to provide electrical supervision. Do NOT
loop bell lead wires around signal circuit wiring.
4. See Figure 4. Using wire nuts (not supplied), connect
wires to circuit. Push connected wires into bell through
entrance hole in bell body base, while mounting
insulator and bell body onto studs of metal mounting
plate. Secure the bell body onto the metal mounting
plate using two lockwashers and two nuts (supplied).
5. Align the tabs on the back of the gong with the grooves
in the bell body and secure with the screw and
lockwasher removed in step 1.
Applying Power
WARNING
This device will not operate without electrical power. As
fires frequently cause power interruptions, we suggest you
discuss further safeguards with your local fire protection
specialist.
1. Apply power to fire alarm or system control panel.
2. Initiate an alarm to activate bell and verify that it
sounds.
3. Reset panel to silence bell and return panel to
supervisory mode.
CAUTION
Break wire run to provide electrical supervision. Do NOT
loop bell lead wires around signal circuit wiring.
4. Using wire nuts (not supplied), connect wires to circuit
and push wires and connections down inside the
electrical box (Figures 3 and 5).
Maintenance
Always disconnect all power before servicing or cleaning
bell.
Examine bell annually for accumulation of dirt and clean
when necessary.
5. Mount insulator and bell body onto studs of metal
mounting plate (Figures 2 and 3). Secure using two
lockwashers and two nuts (supplied).
CHESHIRE, CT 203-699-3300 FAX 203-699-3365 (CUST. SERV.) 203-699-3078 (TECH SERV.)
CAUTION
P/N P-047550-0590 ISSUE 6 © 2001
g
h
10" Gong
g
8" Gong
Assemble bell base to mounting
plate with (2) lockwashers and
(2) nuts (supplied with bell)
6" Gong
Outlet 3/4" (19 mm)
11/16"
(17.5 mm)
Optional
weatherproof box
Cat. No. 449
Outlet 3/4" (19 mm)
2 29/32"
(73.8 mm)
3 11/32"
(84.9 mm)
3 15/32"
(88.1 mm)
3"
(127 mm)
(76.4 mm)
7"
(177.8 mm)
5"
Center line
of base
Base
4 5/8"
(117.5 mm)
9" Leads (2) black and (2) red.
1/4" stripped.
5 1/16"
(128.6 mm)
5 1/2"
(139.7 mm)
5 5/8"
(142.9 mm)
Figure 1. Bell Dimensions
Front ViewSide View
TOP
For wall box mounting:
Use bell wire exit hole in mounting
plate for bringing bell lead wires out
for connections in electrical outlet box
For surface mounting:
Use wire entrance hole in bell body for
circuit wiring to bell lead connections.
Place connections in bell housing,
behind insulator.
Insulator
(2) Studs
Figure 2. Metal Mounting Plate and Insulator
reen ground wire to appropriate eart
Attach
ground. Electrical box grounding shown for
illustration purpose only.
Mounting Plate
Insulator
Bell Body
Gong
$
G
D
S
W
D
E
H
OO
Grooves for
aligning gong
Figure 3. Installing the Adaptabel, Wall Mount
Figure 4. Installing the Adaptabel, Surface Mount
Mountin
Grooves for
aligning gong
Plate
Insulator
Bell Body
Wiring for 4-wire bells to existing 3-wire signal circuit Wiring for 4-wire bells
Red Red
Blk Blk
From supervised
signal circuit or
previous appliance
Blk Blk
Wht
Red Red
Blk Blk
End of line
resistor
From supervised
signal circuit or
previous appliance
Gong
$
G
D
SW
D
E
HO
O
End of line
resistor
NOTE: Use leads for connections as shown. Wire run MUST be broken to provide supervision of signal
circuit.
P/N P-047550-0590 ISSUE 6
Figure 5. Wiring Diagrams
Page 2
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