Connecting A Pump Start Relay; Connecting A Toro Rain Switch - Toro ECx User Manual

Connecting a Pump Start Relay

(Optional)
Caution: To prevent timer damage, ensure the
relay current draw does not exceed 0.30 Amps.
Do not connect the timer directly to the pump
starter.
1. Route a wire pair from the 24 Va.c. pump relay into
the timer housing.
2. Connect one wire to the terminal labeled COM (11).
Connect the remaining wire to the terminal labeled
PUMP/MV (12) as shown below.
BATTERY
11
12
24 V a.c. Pump Relay
Caution: To prevent pump damage due to
"Dead-heading," connect a jumper wire from
any unused zone terminal to a zone terminal
with a valve connected.
Jumper Wire
Valve Common Wire

Connecting a Toro Rain Switch

(Optional)
The Toro Rain Switch (model # 53221) is a remote rain
sensing device which can be connected directly to your
ECx timer to automatically interrupt watering during rain.
A Sensor bypass switch is
provided to enable the Rain
Switch operation to be
turned On and Off.
When the Rain Switch
absorbs rain water it auto-
matically signals the ECx to
suspend all watering opera-
tions. The "No Watering"
symbol will appear in the
upper right corner of the
display until the Rain Switch
drys out and automatically
resets. The "No Watering" symbol will disappear and
timer operation will resume as programmed.
1. Route the wire cable from Toro Rain Switch into the
timer housing through the access hole provided.
2. The Rain Switch cable has four wires: two copper
wires and two silver wires. Only two of the wires are
used. Connect the heavier 18 AWG (1.0mm
wire and the thin 24 AWG (0.50mm
terminals labeled SENSOR (10). Trim off the remain-
ing two cable wires.
3. Set Sensor Switch (13) as required: ON allows the
Rain Switch to interrupt watering; OFF bypasses the
Rain Switch input.
13
10
Toro Rain Switch
2 ) copper
2 ) silver wire to the
25