4901 TrueAlert Non-Addressable Horn Installation Instructions
WARNING: Make
sure that all power is disconnected before starting the installation.
CAUTION: Connect the wiring to terminals as shown. Do not loop wires under the terminals. Break the
wire runs to provide supervision of connections. Strip the lead insulation to a maximum of 3/8-inch
(9.5 mm).
1.
At the enclosure box, connect the contractor wires to the NAC+ and NAC- terminals at the rear of the horn unit. See
Figure 2.
2.
When connecting more than one horn to a circuit, ensure that correct polarity is maintained for each unit.
3.
When connecting the last horn on a circuit, connect an end-of-line resistor (EOLR) to the horn terminals.
TrueAlert Horn (Rear View)
Figure 2. TrueAlert Horn Wiring
TrueAlert
Non-
Addressable
Horn Wiring
Notes:
1.
Notification appliances are rated per individual nameplate label.
2.
Maintain correct polarity on the terminal connections.
3.
Refer to the field wiring diagrams supplied with the FACP for detailed NAC wiring information.
4.
These appliances were only tested to the operating voltage limits of 16 VDC and 33 VDC. Do not
operate these appliances outside these limits, as this can cause the appliance to fail to operate, and/or
cause permanent damage to this equipment.
NAC+ TERMINAL
NAC- TERMINAL
NAC TERMINALS ACCEPT
2 WIRES: #12 - #18 AWG
16-33 VDC POWER INPUT
(See Note 4)
PRODUCT ID
NAMEPLATE LABEL
IF LAST APPLIANCE
ON CIRCUIT,
CONNECT EOLR
(See Notes)
16-33 VDC FROM
NOTIFICATION APPLIANCE
CIRCUIT OR PRECEEDING
APPLIANCE
(See Notes)
2
