P/N IM-520/MH Rev. E
1
*CWSI-IM-520MHE*
© 2017 Johnson Controls. All rights reserved. All specifications and other information
shown were current as of document revision date and are subject to change without notice.
Low Frequency Sounder Model 520(R)(W)
Mini Horn Sounder Model MH(R)(W)
Description:
The Model 520 and MH are self-contained wireless audible notification devices which comply
with UL464 and NFPA 72 when installed in accordance with this manual. The sounders are
designed for use in sleeping areas as well as common areas within protected premises. The
model 520 is a low frequency sounder capable of annunciating temporal 3 or 4 pattern and
the MH is a piezo type sounder which produces the temporal 3 pattern. The 520/MH are fully
supervised for tamper, low battery, output driver fault and RF signal integrity. The individual
models can also be synchronized by interconnecting them. The sounders are powered by
3.6 volt lithium batteries as listed under the specifications section of this manual and the label
on the product. The Models 520 and MH are intended to be used with CWSI Fire Alarm
Control Panels. Refer to the control panel manual for compatibility details.
Installation:
The Model 520/MH must be installed and maintained in accordance with the National
Fire Protection Association’s Standards (NFPA), the National Electrical Code and all
local fire and electrical requirements. The 520/MH is to be installed in an indoor dry
location. Exposure to weather or corrosive conditions may damage the unit.
Locate a few accessible locations that are not prone to tampering or accidental damage.
Sound db output level, reliable RF signal, repeater depth and mounting method are important
factors when deciding on an installation location. Refer to the individual sections in this
manual to perform the sound level and signal survey testing.
Sound output level and RF
signal survey tests must be conducted prior to and after mounting the product.
Once
successful sound and signal survey tests have been completed
the 520/MH can be mounted.
Mounting options include single gang, dual gang,
4” conduit box or surface mount directly to
the wall. When mounting directly to the wall the mounting surface should be relatively flat
and be capable of accepting screws or anchors. Always install the product vertically
observing the UP and arrow in the back box as shown in figure 1. Any other mounting position
will result in tamper troubles on the control panel. Mount the product in the desired location
then place the control panel in enrollment mode and install the batteries as shown in figure
2. Refer to the control panel manual for enrollment procedures. Observe polarities marked
on the battery holders. There is one battery for the RF circuitry and two for the sounder driver
circuitry. The RF battery is p/n ER34615 and has a black line around the outside of the battery
at the + terminal. The sounder driver batteries are p/n ER34615M and have a gold line around
the outside of the battery at the + terminal.
Warning: Always install a new battery of one
of the approved types as listed in the Specifications section of this manual and the
product label.
Two short beeps will be emitted
from the sounder along with a power up reset
trouble showing the product serial number at the control panel indicating successful
enrollment. Attach the front of the 520/MH to the back box by inserting the tabs on the bottom
of the front into the slots on the back box then hinge the front closed and secure it with the
two supplied screws (figure 3). Perform sound, RF signal and alarm tests as specified in this
manual after installation is complete.
