Installation manual

610C-001 INSTALLATION MANUAL DOCUMENT No. 070906 REV. 1.2
INSIGHT INSTRUMENT CORP. BOX 122, FORT ERIE, ONTARIO, L2A 5M6
Wiring Considerations
The G3 series system is supplied with a factory-assembled wiring harness configured for the speci-
fied number of cylinders. The harness edge connector contains a polarization pin which mates with a
slot in the display’s printed circuit board. This prevents improper engagement of the connector.
Before installing, confirm that the factory fabricated harness connector matches wiring diagram,
Drawing # 1200-018. All the red thermocouple wires should be on one side of the connector.
The G3 series Display circuit boards are supported during shipment by small anti-static shipping re-
straints. Leave these restraints in place during the installation of the display and remove only prior to
inserting the harness edge connectors.
Unlike most other EGT and CHT installations the probe wire length is not critical and may be trimmed
to any length as required to fit each probe.
Note: Plan your Installation to include a service loop in the GEM wiring harness to allow for future
adjustments.
CAUTION: Splicing of the thermocouple wire is not recommended.
Display Wiring Power Connections
The G3 series Display automatically accommodates both 14 and 28 Volt electrical systems.
Connect the “red” power lead to a separate trip-free, re-settable circuit breaker that receives power
from the avionics bus or aircraft bus.
If the aircraft does not include an Avionics Master switch circuit or bus, we recommend that one be
installed or a separate switch (user provided) to remove power from the Display unit during engine
starts.
Connect the ground wire (black) to a common avionics ground bus (airframe ground).
11/32