Unity DAU Voice Alarm System Installation and Maintenance Manual Revision 1A − June 2005
UNITY DAU Installation & Maintenance Manual Introduction Voice Alarm (VA) systems are the quickest way to evacuate the public & staff from a building. Following fire detection, automated messages control the flow of people in stairwells and corridors allowing an orderly evacuation without panic. These messages are supplemented by spoken messages from the fire service or management suite confirming the validity and need to leave the building.
UNITY DAU Installation & Maintenance Manual Priorities The Unity DAU has six fixed priorities for the inputs as follows:1. Fire Microphone, this is the highest priority input on the system, designed to be used by the controlling officer. 2. Message Generator, this has three messages, all messages latch until reset from either the front panel recessed button, or from the cancel button on the fire microphone or by the RESET input from the Fire alarm input.
UNITY DAU Installation & Maintenance Manual Indications and Controls Supply Section Indicators AC Indicates healthy AC mains available. DC Indicates the battery supply is available. Fault Either the AC supply or DC supply is unavailable, or a fuse has ruptured. Amplifier Section Indicators (both channels are identical and independent) Open The DAU cannot see both end of line resistors for this amplifier channel. Short The DAU has detected a short on this amplifier channel.
UNITY DAU Installation & Maintenance Manual Important Safety Information This Equipment must only be installed and maintained by suitably skilled and competent person. This Equipment is defined as Class 1 in EN60065 (Low Voltage Directive) and must be EARTHED.
UNITY DAU Installation & Maintenance Manual Unpacking the Unit Remove the Unity DAU from its packing, and check the contents against the following list: 1. Unity DAU control Unit. 2. Installation & maintenance manual (this document) 3. Unity User Guide & logbook. 4. Accessory pack with the following contents:a. Spare Mains Fuse. b. Spare 5A blade battery Fuse. c. 2.5mm AF Alan Key. d. 4 off 18K 0.6W end of line Resistors. e. Crimped Battery Link Lead. f.
UNITY DAU Installation & Maintenance Manual Preparation Remove the front panel plate containing the circuit boards, this has a connection to the mains transformer, which needs to be removed, Exercise static precautions to prevent damage to the electronics, store the front panel assembly safely until the exchange is mounted and cables have been attached. Before mounting the DAU on the wall it is advisable to remove the cable knockouts.
UNITY DAU Installation & Maintenance Manual Mounting UNITY Before mounting the DAU on the wall it is advisable to remove the cable knockouts. Decide the best cable routes from the drawing below: Speaker Circuit A Speaker Circuit B Fire Interface Fire Mic Paging Music Mic Safety Earth Connection Mains IN The Unity DAU weighs 8KGs with batteries, so care should be taken to securely mount the unit on stud walling.
UNITY DAU Installation & Maintenance Manual Mains Connection >0.75mm 2 <2.5mm 2 3A M a in Distr ibu tio n Bo ar d UNITY >3mm Each Unity DAU requires a 3A spur, returning to a breaker clearly marked “Voice Alarm DO NOT TURN OFF”. If the units are distributed around a site it is essential all units are on the same mains phase, as they are classified TEN 230V, powering from different phases can mean a 440V potential can be present in a unit during a major fault incident.
UNITY DAU Installation & Maintenance Manual Speaker Circuits Unity has two speaker Circuits, A & B. to fully comply with the requirements of EN60849 the speakers should be wired in an interleaved pattern, so if one circuit fails messages can still be heard in the areas covered (note it is accepted practice to only place one speaker in an office, as long as the connecting corridor is on the other circuit).
UNITY DAU Installation & Maintenance Manual It is desirable to have an impedance meter available (this measures the AC load that the UNITY DAU sees). The measurement on the impedance meter should not be lower than 330 Ohms at 1KHz. To work out the load from the impedance meter reading use the following equation: P=10,000/Z Where P is the power the amplifier sees, and Z is the reading in Ohms on the impedance meter.
UNITY DAU Installation & Maintenance Manual Fire Microphone Connections The Unity DAU is designed to work with the ALFM1 fire microphone, which is connected Pin for Pin as described below: Note in each block the connections are reversed, on the ALFM1 the Au- pin is on the top, on the Unity DAU the Au- pin is at the bottom of the block.
UNITY DAU Installation & Maintenance Manual Fire Alarm Interface The Unity DAU has been designed to connect to virtually any fire alarm system form simple conventional systems, to complex analogue addressable loop systems. The minimum fire alarm interface as defined by 5839pt8 is a monitored signal from the fire panel for evacuate, a de-latch signal on reset or silence (Reset on the DAU) and a signal from the Voice Alarm to the fire alarm control and indicating equipment signalling a fault.
UNITY DAU Installation & Maintenance Manual Momentary Operation If no reset output is available, and you have permission from the authorities or consultant, the Unity DAU can be set for momentary operation, however this will not comply with the word of BS5839pt 8. In this mode the messages will sound when there is a positive voltage across the Alert or Evac terminals.
UNITY DAU Installation & Maintenance Manual Page Input The paging input is an unmonitored input, at line level and the PTT line is connected to 5V to operate. Once operated paging will mute the music input, once paging is complete the music will return gently. The Ptt line goes to 5V when either the Fireman’s microphone or message generators are in use, the Unity desk microphone uses this signal to light the busy LED on the microphone.
UNITY DAU Installation & Maintenance Manual Music Input The music input is via a stereo pair of phono connectors, the Unity DAU is mono in operation, and the Left & Right signals are mixed together in the DAU. If a mono line signal is required, this can be provided to either input. Music is automatically muted when mains fails in line with BS5839pt8 to preserve battery life. The level of the paging microphone can be independently adjusted using the front panel recessed control marked “MUSIC”.
UNITY DAU Installation & Maintenance Manual Technical Specification POWER SUPPLY AND CHARGER AC input Internal power supply Supply & battery monitored Protection Temperature compensation Battery size and type Mains fuse Battery fuse Max Battery Charge current 230Va.c +/- 10% 50/60Hz 30VDC Open, Short, Fuses Deep discharge, Short, Thermal YES 2 x 12V 3.2AHr VRLA connected in series 240V 2A HRC ceramic 20mm Compliant with IEC (EN60127 Pt2) 5AF 24V Blade Fuse 1.
