7
Connecting a Pump Start Relay
CAUTION: To prevent controller damage, ensure the pump start relay
current draw does not exceed 0.3 amps. Do not connect the pump motor starter
directly to the controller.
1. Connect a wire pair to the 24 VAC pump start relay. Route the wires into the
controller housing with the valve wires.
2. Connect one wire to the terminal labeled COM. Connect the remaining wire to the
terminal labeled MV. See Figure 3.
CAUTION: To prevent pump damage due to “Dead-heading,” connect a jumper wire
from any unused station terminal to a station terminal with a valve connected. See Figure
3
Rain Sensor Installation
A rain sensor can be connected directly to the TEMPUS Controller to automatically
interrupt watering when it begins to rain. When the rain sensor absorbs rain water,
it automatically signals the TEMPUS Controller to suspend all watering operations.
The display will alternately show (sensor).
1. Route the wire cable from the rain switch sensor into the controller along with the
valve wires.
2. Remove the jumper wire from the sensor terminals.
3. Referring to the instructions provided with the rain sensor, connect two wires
from the rain sensor designated for “Normally Closed” applications to the sensor
terminals. See Figure 4.
Figure 3
Figure 4
Toro TEMPUS Controller 4
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