How to Test a Flow Switch

Written by bianca bumpres
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A flow switch is used to monitor the flow of different types of substances---usually air or water. It senses different pressure generated from different flows. The flow switch is hooked through a venture to an electronic circuit at a flow level previously determined. In this way, the flow switch acts as a protector to the equipment or appliance. A flow switch is used in damper regulators, water pumps and air conditioning systems. In general, a flow switch is tested annually.

Skill level:
Moderately Challenging

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Instructions

    The Right Flow at the Right Time

  1. 1

    Put cover on the flow switch and turn power on.

  2. 2

    Start flow through the designated system.

  3. 3

    Observe flow in operation to determine if flow switch is working properly.

  4. 4

    Repeat this process many times to ensure flow switch and designated system is in fact working accurately.

Tips and warnings

  • If the flow switch is not working properly, adjustments might need to be made.
  • The flow switch should be replaced every five years or 100,000 cycles, whichever comes first.

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