Electronics International CA-1 - Manual (Page 16)

7. Hook-Up Connecting Wires:
Connect the red wire supplied in the kit to the 12 or 24 volt bus via a 1 amp fuse or circuit breaker (see the
Wiring Diagram at the back of this manual). Connect the black wire supplied in the kit to ground. Connect
the white/violet to the 12V bus (leave it open for a 24V system). Connect the white/gray wire to the 24V bus
(connect to ground for a 12V system). If this unit has an "Ice Zone" warning light, connect the white/orange
wire to the Panel Light Rheostat to dim the "Ice Zone" warning light at night.
Tie off any excess cable under the instrument panel. Be sure these cables do not obstruct the freedom of
travel of any controls.
8. Connect and Install the Instrument and/or Remote Switch:
Connect the extension cables and all other wires to the instrument and/or remote switch as shown in the
appropriate wiring instructions at the back of this manual. Be sure the connectors mate properly. Install the
unit from behind the instrument panel using 6 x 32 screws. These screws must not be longer than .4 inches.
Install the remote switch through a 1" square hole cut into the aircraft instrument panel. Tie wrap cables as
needed. Be sure these cables do not obstruct the freedom of travel of any controls.
9. System Ground Test:
A. Turn the master switch on and look for a near ambient temperature reading on each channel. If the
instrument does not power-up (display a reading), check the power and ground leads (red and black leads)
for an open, loose or poor connection.
If you suspect any channel is not receiving a signal remove the probe from the engine (leaving it connected
to the Extension Cable) and apply a temperature to it. Look for an increase in reading on the display for that
channel. Check the other channels for an increase in reading. You may have connected the probe to the
wrong Extension Cable. If the reading is decreasing, you may have reversed the connectors on the Extension
Cable leads (the yellow wire on the probe must connect to the yellow wire on the Extension Cable).
B. Start the engine and check each channel for a proper reading. On the ground EGT’s will read around
900’F and CHT’s will read around 200’F. If you suspect any channel is not receiving a signal properly, see
the “Troubleshooting” section of this manual.
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Installation Instructions 7. Hook-Up Connecting Wires