MiniWarden Manual • 530-205-4520 • 11
Supply 110/240 Vac Input Selection
The MiniWarden supports both 110 VAC and 240 VAC. For 110 VAC the power cord includes a GFCI
on the end of the cord that plugs in. For 240 VAC the cord should be removed and the MiniWarden
should be hardwired to a circuit breaker with a GFCi by a licensed electrician. The cord can be returned
to ControlOMatic for a credit.
● VAC Selector: The red switch on the left of the bottom circuit board must have the switch notch up
for 110 VAC, and down for 240 VAC. Incorrect selection will damage the MiniWarden.
● A good solid earth ground is required for MiniWarden to work properly.
● The ORP and pH relay are directly connected to the input VAC. If you have the MiniWarden set for
240 VAC then the loads must also be 220 VAC.
● For 240 VAC operation, the neutral line will be connected to the Red 240 VAC wire and the Line
connection will be to the Black 240 VAC wire. The Neutral connection for pH and ORP relays
switches the Neutral input VAC wire. The relays are double through and break both lines.
Load / Equipment Connection & Installation
ORP & pH RELAYS: The chemical feed relays for pH and ORP are internally connected to the
input VAC main input which is located on the left side connector on the circuit board through 5 AMP
fuses F1 and F2. No voltage is being supplied to the load / equipment when the relay is off, hence,
voltage is being supplied to the load / equipment when the relay is on. Any standard chemical feed
pump or solenoid valve can be hard wired directly into the appropriate ORP and pH connection
terminals as shown below in PICTURE 4 so long as their voltage matches the input VAC connected to
the MiniWarden. Note: Minimum wire gauge for output relays is 16 gauge.
Relay Board Acronyms for ORP & pH 120/240 VAC Relays:
qLine: Normally Open Black. When the ORP & pH relay is off the terminal will have no voltage.
Hence, when the relay is on the terminal will have voltage.
qNeutral: For 110 VAC - This is connected to the input white neutral wire when the relay is on.
For 240 VAC - This is connected to the neutral connection on the VAC input terminal which is
connected to the 240 VAC red wire.
qGND ( ): The ground connection for the ORP and pH chemical feeders.
qORP NO: The connection to the relay that is normally open. When the relay is off there is no
supplied voltage, only when the relay is on.
qORP NC: The connection to the relay that has voltage when the relay is off. When the relay is on
there is no voltage.
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