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BCS3000M-9
APPENDIX D: EXHAUST FAN FLOW LIMIT SWITCH INSTALLATION
Mount the exhaust fan flow switch in the dryer exhaust duct as shown below.
Installation:
1. Cut a 2" hole in the duct where the pitot tube will be located.
2. For "blind" applications, mark two of the holes using one half of the mounting flange.
3. Reach through the 2" hole to hold the nuts in place to mount the plate half. Use silicone
sealant as a gasket. Tighten the nuts and bolts securely. Insert the pitot approximately 12"
into the duct and hold in place.
4. Using the second half of the flange, tighten the 1/4-20 bolts to hold the pitot in place.
5.
WARNING! Do not
fasten both halves of the flange. One side is left unbolted for removal
and cleaning of Pitot tube.
6. For other applications, weld the four duct mounting nuts to the inside of the ductwork using
the flange as a pattern.
7. Use silicone caulk as a gasket.
8.
Remote mount the pressure switch to a vibration and heat free location. Connect the plastic
tubing from the pitot to the switch connecting the upstream side of the pitot to the bottom of
the switch and the downstream side of the pitot to the top side of the switch. Wire switch
per schematic.
Y6909
(NOT TO SCALE)