IX-1
95-8470
Section IX
System Startup
PRE-COMMISSIONING CHECKLIST
GENERAL
Insulate all shields to prevent shorting to the device
housing or to any other conductor.
Place alarm/release output in “Bypass/Isolate” when
servicing devices.
Maintain a log book containing the type and serial
numbers of devices as well as the location and date of
installation.
Maintain a log of maintenance activities.
Observe normal precautions for handling electrostatic
sensitive devices.
LON
Rocker switches for each LON device must be set to the
desired address prior to power-up.
Test the loop with no power applied and all
communication modules removed. DC resistance
should be equal on A and B.
Check polarity on A and B (no rolls). COM 1 connects
to COM 2 ; COM 2 connects to COM 1. A connects to
A and B to B.
Measure voltage. A to chassis ground measures
approximately +7.5 vdc. B to ground measures
approximately –7.5 vdc.
Measure signal (400 mv P-P min.).
Check fault tolerance by introducing a short and an
open.
LCU
Verify correct switch positions.
All configuration data must be downloaded to the
device and written to the EPROM after any change is
made. Changes to the logic controller also require
downloading via the key switch.
Chassis ground stud must be connected to earth
ground.
Check RS-485 connections and polarity.
The last device requires an EOL resistor.
All devices sharing a common RS-485 link must have a
common system power return.
LIOU
Verify correct jumper positions and switch settings.
Never disconnect the circuit ground between the LIOU
and the LCU.
Check signal circuits for correct polarity.
Check for correct installation of EOL resistors.
POWER SUPPLIES AND POWER MONITORS
Verify all earth ground connections as specified in the
wiring instructions.
Verify correct ac power to supply.
Check power distribution to ensure that all devices are
receiving power.
Check power trouble indicator by introducing a short
and an open.
FLAME DETECTORS
Check for potential false alarm sources.
Check detector aiming and ensure that mounting
brackets are tight.
Check for objects that can block the detector’s view.
Detectors can be checked for proper response using
the test described in this manual.
DCUs
Check modules for correct orientation.
Check for the presence of contaminants or poisoning
agents.
Device should be oriented with the sensor pointing
down.
IDCs
Check for correct installation of EOL resistors.
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