Appendix B: Calibration, Maintenance, and Care
BlowerDoor Standard
January 2022
83
Maintenance
Periodically examine the fan regarding the motor position, the tightness of flow sensor and tubing, and
whether the ring clips are tight (if necessary tighten screws). Furthermore the fan should always be
free from dust deposit.
Testing the motor position
To test the motor position, remove all rings. Lay a straight edge upright over the fan housing. Use a
ruler or a yard stick to measure the distance between the straight edge and the motor, and then
compare to the permissible motor distance.
Fig. 8.5
Permissible distance from
housing (without rings) to motor:
9.5 mm to 15.9 mm.
Fig. 8.6
If the permissible distance is exceeded, the fan must be sent to our offices for calibration and repairs.
9.5 to 15.9 mm
