www.krain.com
06
INSTALLATION
Installing the K-Rain Universal Rain/Freeze Sensor Receiver into
controllers WITH sensor terminals.
Find the controller sensor terminals (generally marked “SENSOR”, “SEN”
or “S”) and attach the yellow Universal Rain Sensor control wires directly to
these terminals in any order . Next install the red power wire to the positive
terminal (generally marked “VT” or “24VAC”) and the black common wire
to the common terminal (generally marked “C” or “COM”) or the neutral
24VAC terminal .
NOTES:
• There may be a jumper tab or wire
between the sensor terminals that
must be removed.
• If a rain sensor is removed, the
preinstalled jumper wire MUST be
reinstalled on the SENSOR terminals.
• Controllers with global overide and/or switch must
be active/on in order for the sensor to work properly.
Installing the K-Rain Universal Rain Sensor Receiver into controllers
WITHOUT sensor terminals.
a. WITHOUT pump start relay/master valve (Fig. 1). Find the controller
common terminal (generally marked “C” or “COM”) and attach one yellow
Universal Sensor wire directly to the terminal. Locate the second yellow
Universal Sensor wire and connect directly to the field common valve wire.
NOTE:
The common wire to the valves does not have to be interrupted at the controller.
Rain sensor may be wired anywhere along the common wire line.
Irrigation System Controller
To Valves
Common Wire From Valves
Wire Connector
RED
BLACK
YELLOW
YELLOW
1
2
3
4
C
P
24 VAC SENSOR
FIGURE 1:
Irrigation System Controller
To Valves
RED
BLACK
YELLOW
YELLOW
1
2
3
4
C
P
24 VAC SENSOR
