Carrier SINGLE PACKAGE ROOFTOP UNITS 48PG20-28 Installation And Service Instructions Manual page 59

Single package rooftop units electric cooling/gas heating with electromechanical controls and puron (r-410a) refrigerant
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LEGEND
IDM —
Induced-Draft Motor
IGC —
Integrated Gas Unit Controller
NOTE: Thermostat Fan Switch in the
"AUTO" position.
Fig. 46 — IGC Control (Heating and Cooling)
59

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