29
on the side). It is intended to prevent dry run
of centrifugal pumps. The helical rotor pump
types will maintain pressure even as it runs
dry, so this device will not work reliably. It will
also shutoff if the pressure falls due to high
water demand.
Pressure switch connection There are two
ways to connect the pressure switch:
1. primary power switching The switch is
used to disconnect the DC power source.
Wire the switch between the power source
distribution point and the controller, as you
would with a conventional pump.
2. remote switching This method uses the
“remote float switch” terminals. Small wire
(minimum #18 AWG) can be run to the
pressure switch from a long distance. See
illustration below. Advantage: the controller
stays on all the time. If the water source runs
low (even if it recovers) the “Source Low”
indicator light will stay on to notify the user.
Power draw of the controller in OFF mode is
only about 1 watt.
Pressure switch connected to the controller
(junction box) for “remote switching”
Pressurizing Systems continued
To Next Page
Loading...
Need help?
General
