Mounting considerations
98-158751-C Chapter 4: Installation 4-5
4.2.4 HPA-5015 MCHPA
Installation
Install the MCHPA in one of the locations described below:
• Temperature/Non-temperature controlled locations and forced airflow cooling (Tray
with fan/plenum)
• Temperature/Non-temperature controlled location and supplied airflow cooling (Tray
integrated onto a shelf rack system)
• Pressurized/Non-pressurized locations.
Mount the MCHPA in a suitable tray, refer to Figure 3-8: Outline drawing:
CSDU/MCHPA tray and Figure 3-10: MCHPA ARINC 600 tray connector.
Coolant air pressure drop through the MCHPA (ARINC 600 Equipment Level 1)
Install the MCHPA in a location with forced cooling.
The MCHPA requires air at a flow rate of 43.9 kg/hr at a maximum of 70°C, with a
maximum allowed pressure drop of 50±30 Pa (5±3 mm of water). (ARINC 600 [4] Level
1).
Ground bonding
1
1. Make the grounding wires shorter than 150 mm from grounding start at cable to crimp
terminal lugs.
2. Make the grounding wires as short as possible.
When you combine ground wires it is necessary that the combined wires are as short as
possible.
Chassis Ground: ARINC 600 pin BP8
Radiall contact part number:
620 341. Fit to wire AWG18-20-22-24
Total max resistance: 25 mOhm.
Shield from fluid drippage
To fulfill DO-160G Waterproofness Cat. Y, the equipment must be shielded from fluid
drippage.
1. Source: 97-146191.
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