Nexus 21 A1557 technical specifications Document Ref Nex8inst.doc/Rev0

DANGER: Do not incinerate batteries. If placed in a fire, the batteries may rupture, with the potential to release hazardous gases and electrolyte. VRLA batteries contain substances harmful to the environment. Exhausted batteries must be recycled. Return them to the battery manufacturer or take them to your Council tip for appropriate disposal.

We recommend that isolators are installed at both ends of each loop, immediately the loop leaves the panel.

The volt-free relay contacts provided within the panel must not be used directly to switch any voltage which exceeds 50VAC or 75VDC. (Please also refer to relay rating data).

This equipment requires a 230V AC supply. All installation work should be carried out in accordance with the recommendations of BS5839 Part 1 and the current edition of the IEE regulations by suitably qualified and trained personnel.

The panel must be earthed.

Locate the panel keys and the Installation Kit containing installation spares as follows:

2 off resistors 3K9

5 off 20mm glass fuses (assorted)

1 set of battery leads (positive, negative and a jumper lead)

Open the display door with the key provided. Carefully remove the control panel interior by releasing the cables to the display (carefully noting the connections), the top two chassis screws (located top left and right through the motherboard) and removing the lower two screws (located bottom left and right) on the chassis plate. Open the right hand door and remove chassis in similar manner.

Note: The chassis screws are bright chrome finnish

Fix the empty enclosure to the wall using the fixing hole(s) in the upper section of the enclosure. Complete the fixing operation using the remaining fixing holes in the enclosure.

Gland installation wiring into the enclosure using the cable entry points provided. Leave plugs in any unused cable entry holes.

Replace and fix the control panel chassis. Reconnect any internal earth wires.