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Pump Connection
L This controller does not
provide mains power to
drive a pump–a pump
must be driven via an
external relay and contactor
(pump start) setup
L The controller provides
a low voltage signal that
actuates the relay which in
turn enables the contactor
and finally the pump
® Although the controller has
permanent memory and
thus a default program
will not cause erroneous
valve actuation, it is
good practice to connect
unused zones on the unit
back to the last used zone
® This in effect, inhibits
the chances of the
pump ever running
against a closed head
L In some circumstances
not all operational zones
may be hooked up–for
example, your KRX8 is
capable of running 8
zones but there were
only 4 field wires and
solenoid valves available
for connection
® This situation can pose a
risk to a pump when the
system test routine for
the controller is initiated
Inputs/Outputs
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