4
STEP 3:
CONNECTING THE TRANSFORMER
Refer to Figure 2 and connect the yellow wire to the terminal marked
"YELLOW," and red wire to the terminal marked "RED" and the blue wire to the
terminal marked "BLUE."
Caution:
Always connect the wires before plugging in
the transformer. If not, you run a risk of short circuiting the transformer and/or
clock.
STEP 4:
USING THE PUMP START CIRCUIT
Pump start or master valve capability is available only on the PC-106-PS and
PC-104-PS models. This circuit allows the timer to be used in conjunction with
a "pump relay switch" (Rain Bird model PCR-1) which when activated by the
timer, will in turn activate the pump. The pump start circuit can also be used to
operate a standard 24-volt "master valve."
The hot wire of the relay switch connects to the terminal marked "MV" The com-
mon wire connects to the regular system common wire or terminal. See the
pump relay’s instruction booklet for details.
Caution:
Be sure the total current draw of the relay switch plus the station valve
doesn't exceed 650 milliamps.
Important:
To avoid pump damage caused during a "default schedule," wire
each unused station terminal to a terminal that is being used. This prevents the
pump from operating against closed valves if the default program kicks-in during
a power failure.
STEP 5:
INSTALL A BATTERY
To ensure proper timer operation, install a 9-volt alkaline battery (not included)
to the snap connector near the bottom edge of the control panel. In the event of
a power failure the battery will maintain the programmed watering schedule in
memory for up to 24 hours.
The battery will not allow the timer to open any valves, but the timer will remem-
ber the approximate time of the power failure. When the power resumes, an un-
completed watering cycle will be completed. If a watering start was missed dur-
ing the outage, it will be initiated once the power resumes. After a power out-
age, reset the exact time of day.
If the battery is dead or doesn't have enough power left, none of the program-
ming will be retained. In this event, the timer will revert to its "default program,"
which waters once per day, 10 minutes per station, 8 hours after the power is
restored. All programming steps must be repeated.