Connecting an earth ground, Installation procedures – Irritrol IBOC-Plus User Manual

Page 21

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19

Installation Procedures

Note: Although the battery and the SPC-2 share the same input

terminals, only one power source can be connected to the IBOC

Plus at any given time. If using the SPC-2, connect the Orange

6-Volt (+) wire and Black negative (–) wire to the IBOC’s battery

input terminals.

3. By default, sensor operation is disabled for all automatic watering

programs. To enable operation of the sensor, refer to the “Rain

Sensor Operation” on page 7.
Note: Do not connect the rain switch directly to the valve

common wire

. Refer to the installation instructions provided with

the rain sensor for additional information.

CONNECTING AN EARTH GROUND

A power surge is a sudden rise in voltage on the power main line. It is

then often followed by a drop in voltage as the power line equipment

tries to protect area users. A lightning strike on the power grid is the

most common cause of power surges and can be damaging to the

controller. Surge protection is built into the IBOC Plus terminal board

to help protect the controller from surge damage by shunting the

voltage to earth ground.

MV/

PUMP

EARTH

GND

1

2

3

4

5

6

7

8

9

10

11

12

FOR SERVICE

USE ONLY

INPUT GND

L N

BATTERY

INPUT GND

+ -

RAIN SENSOR

INPUT GND

+ -

VALVE COM

1

2

3

OR

Solar Panel (optional)
Note: Refer to instructions supplied with solar panel for
installation procedure.

Rain Switch
(optional)

DC Latching
Master Valve
(optional)

Valve Common

Earth Ground

DC Latching
Control Valves

Figure 5

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