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User and Installaon Manual

Compact MPA

5 INSTALLATION PROCEDURE

5.1 INTRODUCTION

5.1.1 PA CONFIGURATION, CARGO VESSELS

Compact MPA system installaons onboard cargo vessels, where GA is not integrated into the PA system have no require-

ment for duplicaon.

All loudspeaker loops shall be arranged as closed loops.

5.1.2 PA CONFIGURATION, PASSENGER VESSELS

Compact MPA system installaons onboard passenger vessels are required to be duplicated in order to minimize the eect of

a single failure. The duplicated equipment (Compact MPA) must be separated and located in dierent re zones.

The loudspeaker loops from each system shall be segregated throughout the ship and shall be arranged as closed loops.

5.1.3 PA/GA CONFIGURATION, ALL VESSELS

For cargo vessel installaons where GA is integrated into the PA system as a combined PA/GA system the requirement for

duplicaon is the same as for PA systems onboard passenger vessels as described in secon.

5.2 INSTALLATION GUIDE

5.2.1 PLANNING

The installaon should be planned in detail before commencing. Sound pressure levels and the number of loudspeakers must

be decided upon. The cables should be listed in a cable plan, with the number of pairs etc. The locaon of each unit in the

communicaon system should be planned to obtain maximum performance and user availability.

5.2.2 GENERAL

The main requirement of a GA / PA system is to achieve sucient coverage and sound pressure level (SPL) for alarms and

PA messages to be heard throughout the installaon. The number of loudspeakers, their types (power rang) and tapping

determine the coverage and sound pressure.

The minimum requirement during normal operang condions for GA is 80dBA and at least 10dBA above the ambient noise

level in both interior and exterior spaces. In the cabins sleeping posions and bathroom the minimum requirement is 75dBA

and at least 10dBA above the ambient noise level.

For PA (Emergency PA) the minimum gures are 75dBA and at least 20 dBA above the speech interference level for interior

spaces. For exterior spaces the minimum requirement is 80 dBA and at least 15 dBA above the speech interference level.

jotron MPA 1603 GA User Manual

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