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GFS Pneumatic Connections for Supply Fan (continued)
Pneumatic Connections
Remove plastic shipping cap(s) from the pressure port(s) on the end of the enclosure
labeled P1(+) and P2(-)
(Figure 10).
Option 1:
Connect the tubing between the pressure probe on the discharge side of the
supply fan outlet or duct and the P1(+) on the GFS
(Figure 11).
Use the supplied 0.170”
I.D. flexible tubing for the pressure connections.
Option 2 (low pressure applications):
Connect the tubing between the pressure
probe on the discharge side of the supply fan outlet or duct and the P1(+) on the GFS
.
Install a second pressure probe on the inlet side of the fan or duct. Connect additional
pressure tube to the P2(-) port.
Arrange the tubing to minimize stress on the connections and ensure there are no kinks
in the tubing. Ensure the tubing is clean and do not allow material to fall into the
pressure ports as contamination could damage the switch or block pressure signal.
Figure 11
