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QUESTION Why do we use a reverse-action (N.O.) float switch?
ANSWER If the cable connection is broken, the pump will continue to operate. The water supply will not
be disrupted (but of course, the tank will overflow). This is the general preference in the industry. If you
prefer the pump to stop if the connection is broken, use a normally closed float switch instead.
ILLUSTRATION
Connection of NORMALLY CLOSED float to junction box terminals.
Grounding shielded float switch cable
If you use shielded cable (containing a metallic foil or braid
around the wires, like Dankoff Solar
Float Switch Cable
), connect the shield to ground AT THE
CONTROLLER ONLY. Do NOT ground the shield at the float switch. This will reduce surges induced by
nearby lightning.
If you are not using a float switch,
terminals 4 and 5 must be connected. Terminal 3 remains
disconnected. The product is pre-wired this way at the factory.
Operation of the float switch system
When the water level is high, the float switch will stop the pump.
The FULL-TANK OFF indicator on the controller will light up. When the water level drops, the float switch
will signal the controller. The indicator light will go out, and the pump will restart if sufficient power is
available.
Overriding the float switch
You may want to override the float switch to allow overflow for irrigation
purposes or to test or observe your system. For a N.O. switch circuit, install a switch to DISCONNECT
ONE of the float switch wires. FOR A N.C. switch circuit, install a switch to CONNECT the two float
switch wires together.
UP (open)
FLOAT SWITCH
(normally closed)
DOWN (closed)
NO 3
Common 4
NC 5
Remote
Float
Switch
If cable is shielded,
ground this end only
Содержание SunCentric P
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