Teleflo Dial Indicator 816BC

Flow Rate Information

• The High Flow Point is the flow rate that will give a full flow reading on the scale. This is not the maximum flow that can be pumped through the flow switch.
• The Low Flow Point is the lowest flow that will move the flow indicator needle to indicate flow. A flow below this point is too low for the flow switch to indicate.
• The Switch Setting is the flow at which the switch will activate (change the NC contact from “closed” to “open”). The switch is a SPDT (single pole double throw).

S.P.D.T. Switch

Liquid Flow below Switch Setting Point
Normally Closed (NC) contact is closed.

Liquid Flow above Switch Setting Point
Normally Closed (NC) contact is open.

Installation
TELEFLO flow switches may be installed in any position in a liquid line. Pipe connections are NPT. The size ranges are 1/2", 3/4", 1", 11/2", and 2".

Adjustment
The TELEFLO flow switch is factory set as a low flow switch. Most applications using the TELEFLO will not require adjustments. If the switch must be adjusted, follow these procedures:

Procedure
The TELEFLO must be operating when the switch is adjusted. Both the high flow and low flow switch examples will use graduation mark 15 on the scale as the desired flow rate reading.

To set the switch above desired flow rate
(high flow switch)
Remove the screws holding the cover, glass, and dial plate. Temporarily replace the dial plate with the same four screws. Hold the red pointer firmly with fingers and loosen the slotted shaft nut. Rotate the red pointer in a direction against the liquid flow until switch click or continuity tester indicates switch closure. Retighten nut. Holding the red pointer, loosen the round head positioning screw and rotate the red pointer past the desired flow graduation position (from mark 15 to mark 17 or 18). Retighten red pointer positioning screw. Test for switch closure by increasing liquid flow from desired flow rate reading (mark 15). The switch should activate on a flow indication of mark 17 or 18.

To set the switch below desired flow rate
(low flow switch)
Note: The TELEFLO is set from the factory as a low flow switch. Remove the screws holding the cover, glass, and dial plate. Temporarily replace the dial plate with the same four screws. Hold the red pointer firmly with fingers and loosen the slotted shaft nut. Rotate the red pointer in a direction against the liquid flow until switch click or continuity tester indicates switch opening, then rotate back to obtain switch closure and retighten nut. Proceed as in adjustment for increased liquid flow and test for switch opening by reducing liquid flow.

Connect necessary switch leads and replace cover, glass & dial.

Contact Rating
15A/125V, 250V, 460VAC, 1/8HP 125VAC, 1/4HP 250VAC, 1/2A 125VDC, 1/4A 250VAC