INSTALLATION
42
6.4 INITIAL WIRING CHECK
After installing the wiring as detailed above and before connecting any detectors or end-of-line
devices, the following tests should be carried out.
6.4.1 CONTINUITY TESTS
To check continuity proceed as follows:
a) Short-circuit + to + and - to - at each detector terminal block.
b) Short-circuit the pair at the end furthest from the control equipment.
c) Using an ohmmeter set to its lowest range, check the loop resistance at the control
equipment end.
d) If the reading obtained is less than 50 ohms record the reading obtained and
proceed to Para 4.2.
e) If the reading obtained is greater than 50 ohms locate and rectify continuity faults
by quartering the system.
6.4.2 INSULATION TESTS
To check the insulation proceed as follows:
a) Using an ohmmeter set to its highest range, check the resistance between the
circuit and earth.
b) If the reading obtained is greater than 1 megohm record the reading and proceed
to c), otherwise locate and rectify the earth fault.
c) Remove the short-circuit at the end furthest from the control equipment.
d) Measure the resistance between the zone conductors.
e) If the reading obtained is greater than 1 megohm record the reading, otherwise
locate and rectify the insulation fault.
On completion of all tests to ensure no moisture ingress to the detector during the time between
Installation and Commissioning, fit the weatherproof cover Fig. 27. Ensure that the ‘O’ ring
supplied is fitted to the cover. Securely tighten the four M6 x 20mm hex head screws to retain the
cover.
CAUTION
DO NOT CONNECT POWER
THE FITTING OF THIS TEMPORARY
WEATHERPROOF COVER DOES NOT CONSTITUTE
COMPLETION OF THE CERTIFIED ASSEMBLY
FlameVision
www.acornfiresecurity.com
www.acornfiresecurity.com
To Next Page
Loading...