MiniWarden Manual 530-487-5007 9
Supply 110/220 Vac Input Selection
The MiniWarden supports both 110 VAC and 220 VAC. For 110 VAC the power cord includes a GFCI on
the end of the cord that plugs in. For 220 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 220 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 220
VAC then the loads must also be 220 VAC.
● For 220 VAC operation, the neutral line will be connected to the Red 220 VAC wire and the Line
connection will be to the Black 220 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 o, 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.
Relay Board Acronyms for ORP & pH 120 VAC Relays:
❑ Line: Normally Open Black. When the ORP & pH relay is o the terminal will have no voltage.
Hence, when the relay is on the terminal will have voltage.
❑ Neutral: For 110 VAC - This is connected to the input white neutral wire when the relay is on. For
220 VAC - This is connected to the neutral connection on the VAC input terminal which is connected
to the 220 VAC red wire.
❑ GND: The ground connection for the ORP and pH chemical feeders.
❑ ORP NO: The connection to the relay that is normally open. When the relay is o there is no
supplied voltage, only when the relay is on.
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