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COMB/CO Sensor Filter Replacement
Replace the sensor filters for combustible gas and carbon monoxide sensors with new
ones at 6-month intervals regardless of the frequency of use.
1) Remove the four screws. Remove the sensor
cover and filter elements.
2) Remove the sensor filters.
Sensor cover
Filter elements
Sensor filter for combustible gas sensor
Sensor filter for carbon monoxide sensor
NOTE
Sensor gasket
Sensor filter for
carbon monoxide
sensor
Sensor filter for
combustible gas
sensor
Use a screwdriver with point size 1
(see page 33 for the shape)
.
NOTE
Ensure that the sensor filters, filter elements and sensor
cover are installed correctly. Misalignment may compromise
the detection and waterproof performance of the product.
Be careful not to damage or strike the filter elements with a
finger etc.
Damaged filters may impair their waterproof performance.
Firmly tighten the screws. Loose screws may cause water
ingress into the detector.
Proper gas detection is not possible if water is present inside
the gas detector. Call for repair.
WARNING
0.8mm thick
2mm thick
- 31 -
2) Remove the filter elements from the openings
of the sensor gasket (black rubber seal).
3) Attach new filter elements to the openings of
the sensor gasket.
4) Install the sensor cover by tightening the four screws.
(Recommended tightening torque: 19 cN
·
m)
Filter elements
Sensor gasket
For easy removal, lightly
pinch the sensor gasket
from sides so that the filter
element will come out.
Tighten the four screws evenly in an “X” pattern. Uneven tightening may
compromise the waterproof performance of the product.
NOTE
Ensure that the filter elements are correctly seated in the openings of
the sensor gasket. Misalignment may compromise the waterproof
performance of the product.
CAUTION
For combustible gas and carbon
monoxide sensors, a sensor filter
(for interference gas removal) is
placed under each filter element.
Ensure that the sensor filter and
filter element are properly aligned.
Replace the sensor filters as
required (page 32).
NOTE
Sensor filter for carbon
monoxide sensor
Sensor filter for
combustible gas
sensor
If the sensors come off from the detector, put them back in
their correct locations by referring to the gas names
printed on the front of the detector.
COMB (combustible gas) sensor
O
2
(oxygen) sensor
CO (carbon monoxide) sensor
H
2
S (hydrogen sulfide) sensor
WARNING