MiniWarden Manual 530-487-5007 10
❑ ORP NC: The connection to the relay that has voltage when the relay is o. When the relay is on
there is no voltage.
ORP DRY CONTACT RELAY
A dry contact relay is not connected to any voltage and acts as a switch. To supply power to a load /
equipment (such as a chemical pump) through a dry contact relay, the voltage must be supplied
using a jumper to the appropriate voltage. To change the ORP relay to dry contact the Dry Contact Switch
must be switched to the upper position. In this case, when the relay is on the Line connection will be
connected to the Neutral connection when the relay is on. For the control of a saltwater chlorine generator
the dry contact can be used as a switch with no voltage.
Relay Board Acronyms for the ORP Dry Contact Relay:
❑ Line: One side of the dry contact relay. ❑ Neutral: Other side of the dry contact relay
❑ ORP NO: Line is connected to Neutral when the relay is on.
❑ ORP NC: Line is connected to Neutral when the relay is o.
Supported Auxiliary Dry Contact Loads / Equipment:
Chlorine Generators: A high power chlorine generator should not be powered using MiniWarden’s
internal VAC power as it may exceed the input 2.5 AMP relay rating. One way is to break the chlorine
generator ow switch line (B) as shown in PICTURE 5. When MiniWarden’s relay turns on while the
ow switch is on then the chlorine generator will turn on. When the relay is turned o it makes the
chlorine generator think there is no ow and the chlorine generator will turn o.
Loads / Equipment Using External 24 VAC (Erosion Feeders & Suction Side Cal Hypo): Solenoids are
used to control water ow through a chlorine erosion feeders and suction side cal hypo systems and
may use 24 VAC. Install a 24 VAC Transformer external to the MiniWarden and connect one of the
output leads to the Line connection of the ORP relay and connect the Neutral connection of the ORP
relay to the solenoid as shown in PICTURE 5. Connect the other 24 VAC Transformer wire to the
remaining solenoid wire (C). If the 24 VAC Transformer has an output ground wire then connect it to
one of the GND terminals on the relay board.
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