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MAN0604_Issue 09_02-2013
Apex
2110M8030
5. MAINTENANCE
The sensor unscrews in an anticlockwise direction. Feed the connecting cable out through the
mounting point.
(9)
Feed the cable from the replacement Certified Sensor in through the sensor mounting point.
(10) Fit the replacement Certified Sensor.
Screw the threaded end of the replacement Certified Sensor firmly into the mounting point
until it is fully home.
(11) Cut the sensor cable to the required length.
(12) Connect the sensor wiring to the terminals.
Refer to the wiring notes recorded in step
3
and to the diagram and wiring tables in
Chapter 3
.
(13) Refit the top to the Transmitter Unit or Certified Junction Box base.
Cautions:
1.
Ensure that there is no moisture inside the unit before fitting the lid.
2.
Use only the captive bolts supplied, replacement with alternative bolts will invalidate
certification.
3.
For the Transmitter Unit take care not to damage or strain the ribbon cable connecting
the lid and the base.
The Transmitter Unit top should be aligned using the locating pins on the base and then
lowered onto the base. The Junction Box base does not have the locating pins.
Ensure that the lid retaining cable and/or wiring are not trapped and the O-ring in the top is
correctly located. Check that there is no discernible gap between the top and the base.
Tighten the captive M8 bolts to 5Nm (3.68 foot-pounds).
Note: If the replacement sensor is to be fitted with the original gas sensing cartridge, then remove
the cartridge from the replaced sensor and fit it to the new one following similar procedures to
those in the sub-section
5.2.2
.
(14) Switch on all associated power supplies.
(15) Check that the system is working correctly.
Use the
Calibration Menu => Gas Challenge
menu option to check correct operation of the
unit in the presence of the gas being sensed without triggering alarms, etc. (see
Chapter 4
).
Apply gas using a gas test module
.
(16) Return the system to normal operation.
See
Chapter 4
.
