5
Optional Accessories
Rain Sensor
Connect an optional Rain Sensor to the Timer
Remove the wiring bay cover at the bottom of the unit.
Remove the yellow jumper wire from the terminals
marked
RAIN SENSOR
on the terminal block.
REMOVE
JUMPER WIRE
NOTE:
Do not remove the jumper wire unless connecting
a rain sensor. The timer will not function if the jumper wire
is removed and a rain sensor is not connected.
Connect the two wires from the sensor to the
RAIN
SENSOR
terminals.
CONNECT
WIRES
Master Valve Or Pump Start Relay
Connect an optional master valve or pump start
relay
SST timers support the use of a master valve or pump start relay.
A pump start relay connects to the timer the same way as a
master valve, but connects differently at the water source.
Using a direct burial cable, connect one of the wires from
the master valve (or pump start relay) to the timer termi-
nal marked
MSTR VALVE
.
Using a direct burial cable, connect the remaining wire
from the master valve (or pump start relay) to one of the
timer terminals marked
COMMON
.
MASTER
VALVE
DIRECT
BURIAL
CABLE
POWER
COMMON
Additional instructions for connecting a pump start
relay
To avoid possible pump damage, connect a short jumper
wire from any unused zone terminal(s) to the nearest
zone terminal in use.
Example: if a 4 zone model timer is in use with only two
zones connected, route the terminals for zones 3 and 4 to
the nearest active terminal (in this example, zone 2).
c
WARNING:
Make sure that the total draw of the master
valve (and/or pump start relay) plus the draw of the valve
does not exceed 650mA at 24VAC, 60hz. Note that the
timer does NOT provide main power for a pump.
ACTIVE
TERMINAL
JUMPER
WIRES
