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3.0 Installation Procedure
3.1
General
Carefully unpack the system and check for shipping damage. Mount the cabinet in a clean dry, vibration-
free area in which extreme temperatures are not encountered. The location should be readily accessible
with sufficient room for easy installation and maintenance. Locate the top of the cabinet approximately
five feet above the floor with the hinge mounting on the left. Determine the number of conductors required
for the devices to be employed. Pull required conductors into the box through the knockout provided.
All wiring should be in accordance with the National and/or Local codes for fire alarm systems.
UL Power Limited Wiring Requirements
Power limited and non-power limited circuit wiring must remain separated in the cabinet. All power
limited circuit wiring must remain at least 0.25" away from any non-power limited circuit wiring.
Furthermore, all power limited circuit wiring and non-power limited circuit wiring must enter and exit the
cabinet through different knockouts and/or conduits. A typical wiring diagram for the MRP-4424 is shown
below.
Relays
Bell Circuits
AC Power
Power
Limited
Circuit
Non-Power
Limited
Circuit
PC Board
Figure 3.1-1: Typical Wiring Diagram for UL Power Limited Requirements
14
MRP-4424
Document 15180
Rev D
03/12/97
15180:D
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