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LEGEND
AHU — Air Handling Unit
CUST — Condensing Unit Status
DSIO — Relay Module
DX — Direct Expansion
OAT — Outdoor Air Thermostat
PIC — Product Integrated Control
Factory Wiring
Field Wiring
Fig. 70 — Outdoor Air Thermostat/DSIO Wiring
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Carrier 39L Air Conditioner User Manual