Appendix B: Calibration, Maintenance, and Care
BlowerDoor Standard
January 2022
85
Simple rules for smooth operation
Install the fan in the outer doorway of a large open area. Do not install the fan in doors that open onto
narrow hallways or staircases. Make sure that there is a clearance of at least 1.5 m (with an open fan,
or more depending on the ring) from the intake of the fan. The fan outlet must have a clearance of at
least 1 m. For greatest accuracy, also maintain a clearance of 30 cm on all sides of the intake.
If the fan must be installed next to a staircase or other large obstacle, use a flow ring.
Open the door in which the fan is installed as far as possible.
B.3
Fan Speed Controller
If the Model 4 Bower Door fan stops running or fails to respond to speed commands:
•
Verify that the fan speed controller is turned
ON
.
•
Verify that the fan speed controller power cord is plugged into an AC power mains outlet.
•
Verify that the AC power mains outlet has electrical power.
•
Verify that the fan connect cord from the fan speed controller is plugged into the receptacle
located on the fan electrical box.
•
Turn the fan speed control knob from minimum to maximum and back to minimum. If the fan fails
to respond then the internal fuse may be blown and need to be replaced.
Replacing the fuse
CAUTION
–
HAZARDOUS VOLTAGES INSIDE MODEL 4 SPEED CONTROLLER.
UNPLUG POWER CORD FROM AC POWER MAINS OUTLET BEFORE SERVICING SPEED
CONTROLLER.
Replacement Fuse Specification: 5 Amp, 250 VAC, 5 X 20 mm, FAST acting, approved by VDE/UL.
