User guide

Wiring Harness
Pump
CAUTION: Improperly connecting the speed controller can damage it, the
pump, or the power supply. Ensure that total device load does not exceed the
maximum rating of the controller (36W@12VDC, 50W@24VDC). Ensure that
the connected device will safely accept the voltage being supplied (12V or 24V
depending on the jumper setting).
!
CTR-SPD1224M Installation Guide v 1.0
1
Power In
(12VDC)
2
Power Out
(Pump, Fan, etc.)
The Koolance CTR-SPD1224M uses voltage control
to throttle speeds for 12VDC pumps or fans. With a
jumper setting, it will also step-up and throttle volt-
age for 24VDC devices. CTR-SPD1224M requires
a 12VDC input.
Do not operate components at voltages which exceed
their specifications. Running a 12V-max pump at 24V
from the speed controller can damage the pump.
To avoid damaging the speed controller, do not con-
nect devices which exceed the controller’s maximum
power rating (36W@12V, 50W@24V).
For 3-pin pumps or fans, connect this to the
available plug on the wiring harness.
Use the wiring harness included with
your speed controller. This will accept
the pump or fan connection.
For pumps with larger Molex connectors,
use the larger (2-wire, 4 position) connector
on the wiring harness.
Power Supply
Pump tachometer signals are not used by the speed
controller. If your pump has an integrated speed knob,
it should be left on the maximum setting when adjusting
speed via the Koolance controller.
Pumps with built-in control
should be left on maximum
speed
CTR-SPD1224M has a jumper to select from 12V
(max) or 24V (max) speed control.
CAUTION: Do not power 12V pumps or
other devices with the 24V setting! This
can permanently damage the attached
device.
!
Wiring Harness
Connect One
to Pump
Connect to
Controller
Voltage Jumper
3-pin Pump
or Fan
Wiring Harness
Connect the 3-pin plug from the wiring har-
ness to the controller.
Finally, connect the power supply to the
controller.