Retrotec DucTester 341 - Manual (Page 76)

Page 76 of 83
©Retrotec Inc. 2014
Adjusting the fan Inlet Nozzle if is rubbing or debris needs to be removed
from fan
Remove the tape holding the Nozzle in place. Clean and replace with new tape as supplied with your
system.
If your impeller is rubbing. Remove the Inlet Nozzle. Loosen the mounting bolts. Cover the impeller with
0.10 inches of paper or card stock. Retighten the bolts. Remove the nozzle and the paper and replace
the nozzle with tape to hold it in position.
Tape replacement method shown above. Using the roll of special tape supplied, start underneath the
nozzle inlet, wrap tape around and finish by smoothing down as shown below.