Connect Transformer - Rain Bird ESP-SMT Installation & Operation Manual

Connect Transformer

ESP-SMT Indoor Controller
The ESP-SMT indoor controller has an external transformer
that reduces standard supply voltage to 24 VAC to
operate the sprinkler valves. You will need to connect this
transformer to terminals within the controller cabinet.
F
CAUTION: To prevent electrical shock and potential
damage to the transformer, DO NOT plug in the
transformer until you have connected its cable to the
controller.
A Make sure the transformer is NOT plugged in.
B Feed the three transformer wires through the bottom
left hole in the cabinet. Then pull about 12" of the
cable up into the cabinet.
Tie a loose overhand knot in the cable just inside
C
the controller to prevent strain on the connector
terminals.
D On the horizontal terminal strip at the top of the
controller cabinet, connect the green wire to the
"GND" terminal.
Connect one of the remaining two wires to a 24 VAC
E
terminal. Connect the other wire to the second 24
VAC terminal. Connect either wire to either 24 VAC
terminal; polarity of these wires is not important.
ESP-SMT Smart Modular Control System
61
A
E
F Verify that all connections are secure. Then plug
the transformer into any standard three-pronged
grounded electrical outlet.
!
NOTE: All electrical connections and wiring runs
must be made according to local building codes.
BC
D