Johnson Controls FireClass FC700 Series, Руководство по установке

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FIRECLASS Fire detection system Make Insulation Checks
Installation Guide Doc. version 2.0 12
2 At the control panel, feed the loop cables through
the appropriate knockouts. Use suitable cable glands
as needed. To maintain IP30 pass test status, use a
M20 cable gland with a locknut. Leave generous
tails of wire (approximately 600
mm length).
3 Connect the loop wiring tails to a strip type connec-
tor block, with screw terminals, as shown in Fig. 9.
Leave the wiring loose within the panel.
4 Ensure that the loop screens and metal sheath are
not connected to the addressable loop conductors
and are left floating relative to earth.
5.1.1 Interface Conventional Detectors
If necessary, use a FC410DIM or FC410DDM interface
unit to interface conventional detectors on a loop spur.
For details refer to the documentation for the FC410-
DIM or FC410DDM unit.
5.2 Make Insulation Checks
1 Note that a record should be made of the measure-
ments below, to be handed over to the customer.
2 Ensure your insulation checks will be at 500 V (set
your meter accordingly).
3 Make the usual insulation measurements. For exam-
ple measure the resistance between the two wires
of the loops, and the resistance between the loop
wires and earth.
4 For values less than 1 MOhm this is a failure and the
panel will not operate. In this case investigate and
correct the problem.
5 For values between 1 MOhm and 30 MOhm, inves-
tigate and try to increase the resistance value to
30
MOhm.
5.3 Wire in Remaining Modules
At this stage, wire the remaining modules and isolator
bases into the loops.
5.4 Measure Loop Resistance
1 Note that a record should be made of the measure-
ments below, to be handed over to the customer.
2 Make the usual loop resistance measurements.
3 Check whether the values are acceptably close to
the anticipated values calculated at the design stage.
4 Check that the resistances of the loop positive and
negative wires are the same (within acceptable lim-
its). If there is a problem, rectify it.
5 Remove the temporary connections that you had
made to the connector block, (Fig. 9).
5.5 Fully Connect the Loops
1 Wire the loop wires into their connectors (Fig. 10).
For the pin-out details, use labelling for the loop con-
nections on the board. (The loops are connected to
the FC-FI board or the PLX800 board, if fitted).
2 Plug the connectors to their board sockets.
Fig. 9: Temporary Loop Connection
The dashed lines represent loop wiring
NOTICE
There is danger of damage to equipment.
Before using a high-voltage insulation tester,
ensure that no devices liable to be damaged
are fitted to the circuit. This includes isolator
bases and ancillary modules.
Fig. 10: Loop Wire Connector