TWINFLEX
®
SRP Control Panel Engineering and Commissioning Manual
11
Power Supply Unit
The mains supply should be dedicated to the Fire Alarm Panel and should be clearly labelled ‘FIRE
ALARM: DO NOT SWITCH
OFF’ at all isolation points. The Fire Alarm Panel 230V AC supply requires
a 3 amp fused un-switched spur with local isolation and fixed wiring between 0.75 mm
2
and 2.5 mm
2
,
terminated into the fused terminals provided in the back box. The main PCB is supplied via a Switch
Mode Power Supply located behind the connector board mounting plate. Only the power supply
provided in the unit may be used to power the control panel. Both mains termination and location of
power supply are shown below.
The control panel requires standby batteries. Fike recommends 2 x Yuasa Y
UCEL
Y12-12 or equivalent.
The
sealed lead acid batteries should be installed according to the following diagram. These are to be
sited in the control panel back box using the provided clamps. The batteries should be connected in
series using the connection leads supplied See the section entitled
Control Panel Connections
for panel
connections.
When fitting new batteries the total battery voltage must not be less than 21.5V. If the battery voltage is
less than 21.5V the charger will assume that they are faulty and will not charge them.
Note that the charging circuit will be in its high impedance state (approximately 3V DC) if no batteries,
faulty batteries, or only one battery is connected. The full 27V DC (nominal) charging voltage should be
present if the correct batteries are connected.
If the system shows a charger or battery fault on first power up, leave the system to charge the batteries
for 5-6 hours.
In order to test for correct operation of the batteries, remove the mains 230V AC fuse and allow the
batteries to settle from their charging voltage for approximately 5 minutes. The battery voltage should
then be measured using an electronic test meter and a voltage greater than 24V DC should be seen.
