Krueger | 1401 N Plano Rd | Richardson, TX 75081 | 972.680.9136 | [email protected] | www.krueger-hvac.com
Installation, Operation, & Maintenance for CRFF-E Series
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1. Check pre-filter media; replace or clean as
necessary.
2. Adjust visual speed control for higher blower output.
3. Check power supply for proper voltage, amperage
and distribution frequency.
4. Replace HEPA filter if the air velocity remains low.
1. Ensure that no large obstructions are upstream of
airflow pattern
2. Determine that no other air-moving devices are
operating in or around clean room which disrupt
room’s airflow pattern
3. Check air velocity and if low, conduct the “Low Air
Velocity” procedure outlined above.
4. Conduct smoke and photometer test on HEPA filte .
Seal or replace HEPA filter as necessar .
High Air
V
elocity
1. Adjust visual speed control for lower blower output.
Non-Laminar Flow and/or Excessive Contamination
Warranty
Please reference the Krueger website for Warranty
information located in the Terms and Conditions of Sales
document or click on the following link,
http://www.krueger-hvac.com/pdf/terms.pdf
Troubleshooting
Mode Choice
Verify mode setting choice to DIP switch S1 (Control
Mode), which is manual mode and then retry.
Motor Issues in Manual Mode
(If you are in a network or analog mode, contact your
controls contractor for troubleshooting assistance; if you
continue to need assistance, contact the factory.)
Unit is Not Ad
j
ustable
Verify that rotation of the knob does not change the
RPM or Flow Index display on the unit. If rotating does
nothing, remove the electrical box cover and remove the
4-pin connector from the Visual Speed control and install
in 180 degrees rotated. Again adjust the knob. The 4 pin
connector is on the 1/8” white conductor.
Low Air
V
eloc
i
ty
CRFF Series Replacement Parts
Replacement parts are available through your authorized
Krueger representative.
Please visit the Krueger website at www.krueger-hvac.
com to find your local Krueger representative
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