Specifications

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LST700 SERIES INSTALLATION & MAINTENANCE MANUAL • Approved Document No. DFU7002012 Rev 4
LST700 SERIES FIRE ALARM PANEL
MAIN CONTROL PCB
POWER SUPPLY PCB
push tab
and gently
lift cable
PL1
Leave this end of the connector cable connected
to SK2 on the reverse of the Main Control PCB
THE FIRE PANEL ENCLOSURE
The panel is supplied with a plastic detachable lid, a plastic back box and a minimum of two
separate PCBs. The relative location of these PCBs is indicated in Figure 1 below.
The panel can be surface or semi-flush mounted. It
must be sited internally in an area not subject to
conditions likely to affect its performance, e.g. damp, salt-air, water ingress, extremes of temperature,
physical abuse, etc. It should be sited at a height where it is easily accessible and in a prominent
position within the building. Ideally, the indicators on the front of the enclosure should be at eye level.
Typical locations for the panel are in the entrance foyer/hallway of a building at ground floor level
(the first and most obvious point of contact for emergency services) or a security office that is likely
to be permanently manned.
Removing the lid and base PCBs
To protect the electronics from damage and to expose the base mounting holes, the panel’s lid and
PCBs should be removed prior to first fix installation.
Anti-static handling guidelines
Please ensure that the following electro-static handling precautions are taken immediately
prior to handling the panel’s PCBs or any other static-sensitive components:-
Before handling any static-sensitive items, operators should rid themselves of any personal
electro-static charge by momentarily touching any sound connection to safety earth, e.g. a radiator.
Always handle PCBs by their sides and avoid touching the legs of any components.
PCBs should be stored in a clean, dry place which is free from vibration, dust and excessive heat.
Retaining the PCBs in a suitable cardboard box will also guard them against mechanical damage.
Figure 1 : Location of the panel’s base PCBs and removal details
1 Take the fire alarm panel out of its box and undo the four lid screws using the torx key provided.
Remove the lid to expose the Main Control PCB (the Power supply PCB is located underneath).
2 Carefully remove the five retaining screws on the Main Control PCB and slide the PCB up
and over the mounting pillars, taking care not to damage any of the components.
3 Disconnect the telecoms-style connecting cable at PL1 on the Power Supply PCB, making sure
that the cable remains connected to the reverse of the Main Control PCB to prevent it being
misplaced. Care should be taken when detaching this connector to depress the locking tab to
prevent damage.
4 Pull the Power Supply’s earth strap off the spade connector at the main chassis earth point.
5 Carefully remove the three retaining screws on the Power Supply PCB and slide the PCB
up and over the mounting pillars, again taking care not to damage any of the components.