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XZR250 User’s Manual
22
97528
Issue 5, May 2019
MAINTENANCE
6 MAINTENANCE
!
WARNING: BEFORE performing any type of maintenance on the
equipment read the safety instructions.
Ensure the device has cooled down completely before
attempting to touch or service the equipment.
6.1 Cleaning
6.1.1 Outer Surfaces
Inspect the outer surfaces of the sensor head regularly, and clean with non-abrasive
materials to prevent a buildup of contaminants. Isopropyl alcohol (IPA) and a lint-free
cloth are recommended.
!
CAUTION: Never use any of the following for cleaning purposes:
• Chemical cleaning agents
• High-pressure water or steam
6.1.2 Inner (sampling) tubes
The gas sampling tubes allow the sample gas from the boiler to flow past the zirconia
sensing element.
Inspect and clean (if required) the inner tubes regularly to prevent a buildup of contaminants
or clogging. These can be cleaned with compressed air or a pipe brush.
!
CAUTION: NEVER use the calibration port as this will damage
the sensing module.
1. Remove the sensor head; refer to Section 9 Replacing parts.
2. Using a suitable pipe brush, clear out any contaminants from the sampling tubes.
NOTE:
Alternatively, clear out the sampling tubes using a high-pressure air supply.