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.
5.3
MANUAL CALL POINTS
Manual Call Points may be wired together with conventional detectors in a fire zone. The control panel requires an
alarm resistance of 680 Ohms to be switched across the detection circuit to trip the fire zone into Alarm condition.
This resistor must be connected to each call point used (see diagram). If a call point is the last device wired to a fire
zone, then the End-of-Line resistor must also be connected to that call point, a 3k3 resistor across contacts 1 and
2.
FIGURE 10
WIRING FOR OLD VERSION MCP
FIGURE 11
WIRING FOR NEW VERSION MCP
NB:
The earth of these devices must be terminated at the fire control panel only.
5.4
BELL OUTPUTS
There are two bell outputs rated at 24 V DC 500 mA max across both circuits. These bell circuits are monitored for
short and open circuit fault. An End-of-Line resistance of 3k3 is used. The voltage used to monitor each circuit is
approximately 4.5 Volts. This voltage is high enough to cause electronic sounders to produce an intermittent
squawk. This is muted by simply connecting a 5V6 Zener diode at each sounder - check the polarity (see FIGURE
12 Bell Outputs Wiring Diagram below). Some of these Zener diodes are supplied with the panel.
NB:
Electronic bells have a low coil resistance which will cause the panel to indicate a Bell Fault if the 5V6
Zener is not installed.
FIGURE 12
BELL OUTPUTS WIRING DIAGRAM
– BASED ON THE KL-SO-SR KLAXON SOUNDER
NB:
The earth of these devices must be terminated at the fire control panel only.
A safety feature is also provided that prevents a voltage being supplied to a sounder circuit if there is a short circuit
fault on that circuit.
