Fig. 10. Pressure switch—oriented vertically.
3. The return duct is recommended, however the switch can also be mounted to the supply duct.
Fig. 11. Mounting the pressure switch.
SUPPLY DUCT INSTALL – AIR LINE ONLY TO TAP A, CONNECTED TO THE + PORT ON THE AIR FLOW
SWITCH RETURN DUCT INSTALL – AIR LINE ONLY TO TAP B, CONNECTED TO THE – PORT ON THE
AIR FLOW SWITCH SUPPLY/RETURN DUCT INSTALL – AIR LINE CONNECTED TO BOTH THE + AND –
PORTS ON THE AIR FLOW SWITCH
4. Cut a 3/4-in. diameter hole in the duct within 10 feet of the switch to ensure the provided tubing reaches the
pressure tap elbow.
5. Insert the black rubber gasket into the duct hole.
6. Connect the tubing to the tubing fitting elbow and insert the tubing fitting elbow into the black rubber gasket.
7. Connect the other end of the tubing to the applicable pressure connection on the switch.
Fig. 12. Install tubing.
Black connection if installed on the supply
Grey connection if installed on the return
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