Flow Switch ILH333

Installation

Flgure 1: Trimming Template for the EXtra Paddle

IMPORTANT: To allow the switch to detect changes in the flow condition, the paddle must not touch the pipe or any restrictions in the pipe.

CAUTION: Equipment damage hazard.
To avoid damaging the switch, do not tighten the switch to the tee by grasping the switch enclosure. Use only the wrench flats provided.

• Screw the flow switch in position so the flat of the paddle is at a right angle to the flow. The arrow on the side of the case must point in direction of the flow.

• The switch should be mounted so the terminals or wire leads are easily accessible for winng.

Note: These flow switches must not be subjected to water hammer. If a fast-closing valve is located downstream of the flow switch, a suitable water hammer arrester must be used.

Adjustment

CAUTION: Improper operation hazard.
The switch is factory set at approxi-mately the minimum flow rate Do not set lower than the factory setting as this may result in the switch failing to return to a’no flow’position.

CAUTION: Equipment damage hazard.
Sealed settings (screws marked with black paint) are notintended to bechanged. Adjustment attempts may damage thecontrol or cause loss of calibration, voiding thewarranty.

Flgure 2: Minimum Adjustment

To adjust the setting of the flow switch:
1.Remove the ILH333 cover.
2.For higher flow rates, turn the adjusting screw clock-wise. To lower the flow rate after after it has been raised from the factory setting, turn the adjusting screw coun-terclockwise.
3.Check to see that the flow switch is not set lower than the factory setting by depressing the main lever nu-merous times. If the lever fails to “click” upon return at any time, turn the adjusting screw clockwis until the lever clicks upon return every time.

Checkout Procedure
The circuit betweenthe red and the yellow leads (termi-nals) will close when sufficient liquid flows through the pipe to trip the ILH333. A low flow indicator light or signal, when used, will activate when the liquid flow decreases or ceases.
Before leaving the installation, observe at least three complete oper ating cycles to be sure that the ILH333 and the system to which it is connected are functioning correctly.

Flgure 3: Switch Action

Wiring

WARNING: Shock hazard.
To avoid possible electric shock or dam-age to the equipment, disconnect the power supply before the wiring connec-tions or adjustments are made.