User Guide

Page 34
Thermostat Furnace Condensing
Unit
ML193DF and CONDENSING UNIT
THERMOSTAT DESIGNATIONS
(Refer to specific thermostat and outdoor unit.)
COMMON
POWER
HEAT
INDOOR BLOWER
Y
C
R
G
W1
Y
C
R
G
W
COOLING
FIGURE 50
CONDENSING
UNIT
CONDENSING
UNIT COMMON
*CONDENSING
UNIT
*NOTE − R" REQUIRED ON SOME OUTDOOR UNITS
Install the room thermostat according to the instruc-
tions provided with the thermostat. See figure 50 for
thermostat designations. If the furnace is being
matched with a heat pump, refer to the FM21 installa-
tion instruction or appropriate dual fuel thermostat in-
structions.
Indoor Blower Speeds
1 − When the thermostat is set to FAN ON," the indoor
blower will run continuously on the heating speed
when there is no cooling or heating demand.
2 − When the ML193DF is running in the heating mode,
the indoor blower will run on the heating speed.
3 − When there is a cooling demand, the indoor blower will
run on the cooling speed.
TYPICAL ML193DF FIELD WIRING DIAGRAM
FIGURE 51
IGNITOR
*R
*NOTE − R" REQUIRED ON SOME OUTDOOR UNITS