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(3) Flow Direction
Install
the detector in accordance with the flow direction arrow on the detector. See Figure 4.8.
Figure 4.9 Flow direction arrow on the detector
(4) Preventing an Empty Pipe Condition
Design an upright pipe run (Figure 4.9) or sufficient head pressure (Fig. 4.10) at the
downstream detector outlet if there is a possibility of the detector pipe becoming emptied.
Figure 4.10 Detector with an upright pipe run at downstream outlet
Figure 4.11 Detector with sufficient head pressure at downstream outlet
Flow direction arrow
Upright pipe run
Detector
Detector