Flat 3 Cremer Street Home User Guide

6) Installation Instructions

1.1 Environment The units are suitable for use in most indoor environments where an IP rating of IP30 is acceptable.

1.2 Mounting The unit should be fitted in an upright position on a solid surface using the 4 fixing holes provided. There is a “keyhole” at the upper centre of the enclosure which should only be used to assist in hanging the unit whilst the rest of the fixing holes are being marked. The unit should be located so that later access for maintenance purposes is not restricted. There are 20mm cable entry knockouts on the top side of the enclosure and again attention should be paid to allowing easy access to the knockouts. 1.3 Connections Mains: The unit connects to the AC mains supply via a fused spur unit fitted with a 5 Amp fuse. The unit must be earthed. The spur and wiring should have been installed in accordance with the relevant wiring regulations and by an approved electrician. The wires should be brought into the unit through the enclosure’s 20mm knockouts. Appropriate glands compatible with wiring type must be used. The mains wires from the spur must be connected to the fused mains input block on the power supply. The polarity must be observed. The recommended cable size for the mains wiring is 1 sq. mm minimum. The fuse-block uses a 5Amp 25mm type fuse. Battery: The unit is designed to charge a pair of Sealed Lead Acid batteries wired in series to give 24V and to keep them charged for standby duty in the event of a mains fail condition. The output connection terminals to the battery are at the bottom edge of the PCB. Leads are supplied for connection of the batteries and should be connected as per diagram with red as the positive (+) and black as the negative (-). The interconnection lead is black. The batteries should be placed in the bottom of the enclosure. Note: The unit also has a relay output with a single set of volt-free contacts (com n/c n/o) for fault monitoring. This relay is permanently energised when AC mains is present and will drop out when any of the fault conditions are present. The volt-free connections are at the bottom left edge of the PCB.