Connecting an Earth Ground
CAUTION: The built-in circuit
protection in all Rain Dial Plus
controllers must have an earth
ground path to help protect the
controller from power surges. This
is especially important in lightning-
prone areas. A 12–16-gauge
(2.0–1.0 mm
2
) solid copper ground
wire must be connected to the
ground
lug located on the
controller’s terminal board and a
ground source such as a metal
water pipe or copper-clad ground
rod.
Connecting the Valves
Route one valve solenoid lead from
each valve through the large hole in the
bottom of the controller. Secure each
wire to a separate numbered terminal.
Attach the remaining wire from each
valve to a single common wire and attach that wire to the “VC” (Valve Common)
terminal.
CAUTION: Do not link the common wire of two or more controllers together.
Use a separate, independent valve common wire for each controller. Linking two
or more controllers with a single common wire can cause disruptions or even
serious product damage.
Note: This controller is designed to work with 24 V a.c., 0.25A (6 VA) solenoid operated
valves. A maximum of two solenoids per terminal may be used (not to
exceed 0.5A per station), and no more than three solenoids should be on at
any one time plus the master valve and/or pump start, if one is being used.
Load requirements must not exceed 1.0A maximum total current draw.
Installations continued...
7
MV
1
2
3
Master Valve or
Pump Start Relay
Valve Common
Earth
Ground
Rain Sensor
Switch
2-Amp Fuse
Ground Lug
Rain Sensor
Plug-In
Transformer
Figure 3
