
SPACE SENSOR
CONTROL,
CLOSE DIP-SWITCH
DIP-SWITCH#7
CLOSED
THERMOSTAT
CLOSES
DIP-SWITCH #2
CLOSED
NO
YES
THERMOSTAT
CONTROL
ELECTRIC
HEAT
OUTSIDE AIR
DAMPER AT MINIMUM
POSITION
ELECTRIC HEAT
IS ENERGIZED
INDOOR FAN
IS ENERGIZED
COMPRESSOR
IS ENERGIZED
OUTDOOR FANS
ENERGIZED
NO
Y CLOSED
OUTSIDE AIR
DAMPER CLOSED
FAN IS
CONTROLLED
THRU THE IGC
LOGIC
GAS
HEAT
G INPUT
ENERGIZED
W ENERGIZED
YES
NO
YES
NO
YES
NO
YES
LEGEND
IGC — Integrated Gas Unit Controller
Fig.1—CVOperation with Thermostat
6
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