Connecting a Pump Start Relay
Note: Connecting a master valve or pump start relay
is optional and may not be required for your sprinkler
system.
CAUTION: To prevent timer damage, do not
connect the timer directly to the pump starter.
A 24 VAC, 0.3A (max) relay must be used.
1. For pump relay wires, install a 1/2
″ (13mm)
conduit adapter and conduit.
2. Connect a wire pair to the pump relay terminals
and route the cable through the conduit and into
the timer housing.
3. Connect one wire to the terminal labeled COM.
Connect the remaining wire to the terminal
labeled PUMP/MV.
CAUTION:
To prevent pump damage due
to back pressure, remove all unused zone
modules. Connect a jumper wire from an unused
zone terminal to a zone terminal with a valve
connected.
Connecting the Power Source
WARNING
: AC power wiring must be installed
and connected by qualified personnel only. All
electrical components and installation procedures
must comply with all applicable local and national
electrical codes. Some codes may require a means
of disconnection from the AC power source installed
in the fixed wiring and having a contact separation
of at least 0.120
″ in the line and neutral poles.
Make sure the power source is OFF prior to
connecting the timer.
1. Route 120 VAC power and equipment ground
wires from the power source, through the conduit
and into the timer transformer compartment.
Note: The input power terminal block accepts
wire size up to 14 gauge (2mm
2
).
2. Remove 3/8
″ (10mm) insulation from each wire.
3. Using a small common screwdriver, secure the
wires to the terminal block as follows: Hot to
L,
Neutral to
N, and Equipment Ground to .
6
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