JPI EGT-701 Installation Manual page 10

FAA APPROVED
INSTALLING THE EGT-701 SCANNER®
(alarm wire not supplied)
8
7
6
5
4
11
3
2
RS-232 input to EDM-700
9
1
RS-232
output from
EDM-700
Before you begin, note that the most common cause of probe problems is poor
terminal crimps.
When cutting each pair of leads in the wiring harness to the proper length to connect to the probes, leave enough
slack in the harness so that probes from adjacent cylinders may be interchanged if necessary for trouble-shooting and
servicing. Thermocouple wire length is not critical and should be trimmed to any length as required for a clean
installation.
The Temperature probes must be wired with the correct polarity. Each wire is marked with the cylinder number. The
EGT and CHT probes connect to the temperature indicator with yellow jacket Teflon Chromel Alumel wire supplied.
Strip the wires as shown below, observing color codes.
crimping terminals.
Thermocouple wire harness
Terminate each wire with a crimp-on ring terminal, provided. The ring terminals may be crimped with a "service-type"
tool, however AMP part number 48518 crimp tool is recommended. Verify the quality of each crimp with a sharp tug on
the wire. The terminal should be impossible to pull off when crimped correctly.
Place a ¼ x 4 inch sleeve over each pair of wires in the harness. Connect the harness ring terminal to the probe ring
terminal using the supplied number 4 screws and nuts, placing the star washer between the ring terminals, not against
the nut.
Slide the sleeve over the joint and secure with three tie-wraps.
INSTALLATION MANUAL FOR THE EGT-701 Report 103
+12/24 avionic bus
Cut red lead if
transducer is
also connected
to another fuel
flow instrument
GPS output
GPS input
(some KLN series only)
to instrument
tie-wrap 3 places
1/20/09
Alarm lamp or enunciator
(customer supplied option)
FF
EGT
COM
ALL
EGT
FF
WHT
1
BLK
RED
fuel flow option
connector
GPS
Important: fold back the wire double before
2 1/4"
red
1/4"
shrink tubing
Important: place star waster between two ring
terminals and tighten nut and bolt as
necessary
Rev-E
panel
mounted
switch
WHT
BLK
RED
OUT
Fuel Flow Transducer
FloScan 201 -A, -B, -C, or 231
Fold back wire
yellow
double before
crimping terminals
1 1/2"
shrink tubing
to probe
1/4 x 4" sleeve
Page 10 of 30
IN
ring terminal