Cooling Requirements; Lru/Sensor Installation Information - Garmin G3X Installation Manual

LRU Width
GMU 22
N/A
(Magnetom-
eter)
GSA 28
2.5 inches
(Servo
(63.5 mm)
Actuator)
4.0 inches
GSU 25
(101.6 mm)
(ADAHRS)
GSU 73
5.50 inches
(ADAHRS/
(139.7 mm)
EIS)
2.4.2

Cooling Requirements

While no forced cooling air is required for the G3X system, it is highly recommended that the air behind
the panel be kept moving (by ventilation or a fan).
• No cooling air is required for the GAD 29
• No cooling air is required for the GDU 37X
• No cooling air is required for the GEA 24
• No cooling air is required for the GMC 305
• No cooling air is required for the GMU 22
• No cooling air is required for the GSA 28
• No cooling air is required for the GSU 25
• No cooling air is required for the GSU 73, however the GSU 73 should be mounted in a location
that provides adequate airflow to comply with the maximum outer case temperature listed in
Section 11.
NOTE
Avoid installing the G3X LRUs near heat sources. If this is not possible, ensure that
additional cooling is provided. Allow adequate space for installation of cables and
connectors. The installer will supply and fabricate all of the cables. All wiring should be
in accordance with FAA AC 43.13-1B and AC 43.13-2B.

2.5 LRU/Sensor Installation Information

Each LRU/sensor has unique considerations that the installer should be familiar with before beginning the
physical installation. Become familiar with all installation information by studying sections 3-13 of this
document before actually beginning the installation of the LRUs/sensors.
G3X Installation Manual - Installation Preparation
Page 2-10
Table 2-4 G3X LRU Physical Specifications
Height
2.10 inches 3.37 inches (85.6 mm)
(53.3 mm) Diameter
4.0 inches 2.8 inches
(101.6 mm) (71.1 mm)
2.12 inches
(53.8 mm)
2.5 inches (63.5 mm)
2.61 inches
(66.2 mm)
w/conn
5.50 inches (139.8 mm)
3.96 inches
7.33 inches (186.2 mm)
(100.6 mm)
w/connectors
Depth Unit Weight
0.35 lbs.
(0.158 kg)
1.40 lbs
(0.635 kg)
0.48 lbs
(0.217 kg)
3.1 lbs
(1.406 kg)
Unit Weight w/
Nutplate &
Connector
Weight
0.50 lbs.
(0.226 kg)
NA
0.684 lbs
(0.310 kg)
3.5 lbs
(1.587 kg)
190-01115-01
Rev. L