Table of Contents
How do float switches work?
A float switch works to detect the level of liquid in a tank by using a float, magnet, and reed switch system that automatically opens and closes when water levels rise and fall inside the tank. Once the dry contacts are opened or closed, they will send an electrical signal to set off a water level alarm.
What is the symbol for a float switch?
IEC Symbol Preview – Miscellaneous Switches
| Horizontal Symbol | Vertical Symbol | Description |
|---|---|---|
| HSW12 | VSW12 | Generic Switch, Normally Closed |
| HFL11 | VFL11 | Float/Level Switch, Normally Open |
| HFL12 | VFL12 | Float/Level Switch, Normally Closed |
| HPB11KS | VPB11KS | Key Switch, Normally Open |
Where is the HVAC float switch located?
secondary drain pan
The float switch location depends on the orientation of your HVAC equipment. For horizontal units the float switch will be located in the secondary drain pan. For horizontal units without a secondary drain pan or vertical units, the float switch will be on the drainpipe.
What is a split phase single value capacitor motor?
Split Phase Single Value Capacitor Electric Motor (Dual Voltage Type). Split Phase Single Value Capacitor Electric Motor (Dual Voltage Type). This motor has two identical main winding’s arranged for either series or parallel connections. With the main winding’s connected in parallel, the line voltage is usually 240.
How do you use a float switch on a water pump?
So there we have it. A two-wire float switch that can easily be used for turning a pump on or off. Mount or suspend your switch at the desired level, get your wires into a water-tight junction box (or out of the liquid containment area and then into a junction box), check the connections back to your control and power equipment, and you’re done.
What is the function of starting switch in synchronous motor?
In series with the starting winding is a centrifugal starting switch which opens the starting circuit when the motor has attained approximately 75 to 80 percent of synchronous speed. The function of the starting switch is to prevent the motor from drawing excessive current and also to protect the starting winding from excessive heat.
What are the installation scenarios for a normally open float switch?
Installation scenarios might include a Normally Open float switch turning on a pump to empty a tank (Control Schematic 2), or a Normally Closed float switch turning off a pump that fills a tank (Control Schematic 1).