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4.9 Low-Water Probe for Dry-Run Protection
THIS DEVICE IS NOT NORMALLY USED IN SWIMMING POOL APPLICATIONS.
If you are not using the low-water probe,
connect a short wire between the probe terminals in the
junction box (terminals 1 and 2). Minimum wire size is #18 AWG.
WARNING
Running completely dry will damage the pump end and void the warranty.
The
purpose of the probe system is to sense the loss of water in the source, and turn the pump off.
The low-water probe should be used if it is possible for the pump’s water source to run low, causing the
pump to lose prime or to run dry.
The low-water probe is not included with
SunCentric P
. To obtain this accessory,
order
ETAPUMP Low-Water Probe
Item # 11682 from your Dankoff Solar supplier.
Mounting the probe
The low-water probe is supplied with a hose clamp, allowing
it to be mounted to a water pipe, as shown in the photo. It can be mounted by any
practical means, as long as the electrodes are within 30° of vertical position. It can
be mounted anywhere in the water source. It does not have to be on the intake pipe.
Wiring the probe
Splice the two wires to submersible wires of #18 AWG or larger,
using the submersible splice kit supplied with the probe. The splices use heat-shrink
tubing, like your main pump splice (see splice kit instructions). In the controller,
connect the well probe wires to the low-water probe terminals #1 and 2.
Operation
The probe senses electrical conductivity through the water, between
two electrodes. If the water level drops below the probe, continuity is lost. The
controller will stop the pump and the “Low-Water OFF” light will indicate. When the
water level recovers and again contacts the electrodes, the controller will delay the
restart for 20 minutes. To force a restart, turn the controller off, then on again.
The Low Water-OFF light stays ON for the remainder of the day,
even if the water recovers and the
pump restarts automatically. This tells you that the water source ran low at least once since the power
was disrupted (or sun went down). To turn the light off, reset the controller by turning it off/on.
4.10 External ON/OFF Switching
This section applies to systems that require an external device to switch the pump on and off. If the
external device is to be a float switch to turn the pump off when it has filled a storage tank, see the next
section.
The pump uses a controller that is primarily made for solar powered water supply systems that are used
to fill a tank. The external (remote) switching circuit is used primarily for a full-tank float switch. Therefore,
the terminals are labeled “Remote Float Switch”. However, they can be used for any form of switching
device.
Most external switching devices use “normally open” (N.O.) contacts, where the contacts open
(disconnect) to turn a device OFF. Connect the device to the junction box according to the following
illustration.
Содержание SunCentric P
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