TEC247 Fire & Extinguishant Control Panel
– INSTALLATION & OPERATION MANUAL
DOC NO. PRMAN-0003 TEC247 Rev 04.12 191209.docx
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E. &O.E.
4.1
AC MAINS WIRING
The high voltage AC mains wiring should be routed into the enclosure via a suitable knockout and kept away from
any circuit boards and all other wiring.
NB:
The panel must be connected to the supply earth through the power cable.
The AC mains input connector is shown in the diagram below. Please take note of the positions of the Earth,
Neutral and Live terminal connections which are clearly labelled. Secure the AC wiring using a tie wrap as close to
the terminal block as possible.
FIGURE 3
AC INPUT
The AC Mains Input Fuse is located next to the AC Input Terminal. The Fuse holder is a pull-out type that can be
used to switch the power supply off, if required. We do however recommend that the power supply be switched off
at the AC mains supply isolator.
The fuse is rated as
T 1A H 250 V AC
.
NB:
When external 24 V DC power supplies are used to power auxiliary devices, the earth of all the external
power supplies must be joined with the earth of the fire control panel.
4.2
BATTERY WIRING
The power supply is designed to charge two 12 V DC batteries connected in series. Use the Red & Black leads
provided to connect the batteries to the BATT +VCC and BATT GND terminals on the PSU. The short (Blue) lead
provided is used to connect the batteries as shown in FIGURE 4 below:
FIGURE 4
BATTERY WIRING
NB:
Observe polarity of connections!!
NB:
If no AC input voltage is present and the battery voltage falls below 20 V DC, the PSU will automatically
shut down. Once 220 V AC has been restored, the PSU will automatically reset and restore the 27.5 V DC
supply to the control panel.
NB:
Start-from-Batteries button has been added to assist if no AC mains supply is present on site. The
batteries will need to be fully charged before using this function.
Press and hold Start-from-Batteries button until CPU running LED flashes. Do not continuously run your power supply in
this mode.
