Changing The Certified Sensor - Honeywell Apex Technical Handbook

MAN0604_Issue 09_02-2013
2110M8030
(14) Refit the cap or accessory to the Certified Sensor.
Reverse the removal procedure.
(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
(16) Return the system to normal operation.

5.2.3 Changing the Certified Sensor

(1) Isolate all associated power supplies and ensure that they remain OFF during this procedure.
Ensure a gas free atmosphere.
Metal
retaining
cable
(2) Detach the Transmitter Unit or Certified Junction Box top.
Unscrew the three captive M8 hexagon key bolts underneath the base. Lift the top clear.
For the Transmitter Unit only lift the top clear of the locating pins.
5. MAINTENANCE
module.
The Certified Sensor may be mounted in a Transmitter Unit or
remotely in a Certified Junction Box. When replacing
certified components also refer to the Control Drawings
(see Appendix B).
To replace a Certified Sensor fitted to a Transmitter Unit or a
Certified Junction Box carry out the following procedure:
Caution: Ensure that the Transmitter Unit/Certified
Junction Box flamepath is not damaged during
this procedure. The flamepath is formed by the
mating surfaces of the Transmitter Unit/Certified
Junction Box top and base (see the component
diagrams in Chapter 3).
Transmitter Unit
top
Metal retaining
cable
Certified Junction
Box top
Top fixing screw
(3 off)
95
Apex