INSTALLATION
REDARC strongly recommends that the probe be installed in the radiator by a suitably quali-
fied radiator specialist.
1. Allow the engine to cool completely before commencing any work on the radiator.
2. Select the position on the radiator header tank for the lowest safe coolant level (the
point where alarm is to sound).
3. Drain coolant (to at least below the probe mounting point).
4. Drill and mount the coolant level probe, taking care to avoid any drilling swarf enter-
ing cooling system:
•
For a metal tank, solder in the threaded brass boss. When cool, screw the probe in
using thread tape.
•
For a plastic tank, thread the hole then screw the probe in using thread tape.
5. Refill the cooling system.
6. Mount the LCA1224 where it can be seen and heard from the driving position (or use
external warnings, see below).
7. Connect the wires. (Refer to diagram below)
BLACK
Battery Negative
RED
Positive from ignition switch
BLUE
Connect to probe in radiator header tank.
YELLOW
Ground output for external buzzer (0.5A Max). If not used, this wire should be
folded/taped over.
GREEN
Ground output for external lamp (0.5A Max). If not used, this wire should be
folded/taped over.
The external warning outputs (YELLOW & GREEN wires) are GROUND outputs, so the other
terminal of the lamp or buzzer must be connected to BATTERY POSITIVE. The warning lamp
may be a LED with a suitable series resistor or a filament lamp. The maximum load on these
wires must not exceed 0.5A. To operate higher loads (either output), use the wire to operate
an external relay.
PRECAUTIONS
The LCA1224 is for emergency warning only. It warns of sudden loss of coolant while the
vehicle is operating. It will provide an indication when gradual loss has reached the low
level, but should not be used to avoid regular visual checking of the cooling system. The
cause of any loss of coolant should be investigated rather than just using the LCA1224 as a
reminder to top it up.
SPECIFICATIONS
MODEL
LCA1224
Supply range
11-32V
Current draw (alarm off)
<2mA
Current draw (alarm on)
Approx 15mA
Warning
LED & Beeper
Dimensions
65 x 40 x 25mm
Weight
<40gm
Warranty
2 years
