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Manual 2100-684
Page
12 of 25
SEQUENCE OF OPERATION
Operation
G
Y/O
Y1
Y2
W1/E
W2
O/B
D
A
Fan Only
X
1
st
Stage Cooling
X
X
2
nd
Stage Cooling (if employed)
X
X
X
1
st
Stage Heating
X
X
2
nd
Stage Heating (if employed)
X
X
X
Dehumidification
X
Ventilation
1
X
1
X
1
CS9B(E)-THOCA
(CO
2
Sensing Capability) models will activate both
G
and
A
terminals upon a ventilation call;
however, the
CS9B(E)-THOA
(Non-CO
2
Sensing) models will activate the
A
terminal only if there is an existing call
for the indoor blower, whether through space conditioning or through constant fan operation.
Operation
G
Y/O
Y1
Y2
W1/E
W2
O/B
D
A
Fan Only
X
1
st
Stage Cooling (Economizer)
X
X
2
nd
Stage Cooling
X
X
X
3
rd
Stage Cooling (if employed)
X
X
X
X
1
st
Stage Heating
X
X
2
nd
Stage Heating (if employed)
X
X
X
Dehumidification
X
Ventilation
1
X
1
X
1
CS9B(E)-THOCA
(CO
2
Sensing Capability) models will activate both
G
and
A
terminals upon a ventilation call;
however, the
CS9B(E)-THOA
(Non-CO
2
Sensing) models will activate the
A
terminal only if there is an existing call
for the indoor blower, whether through space conditioning or through constant fan operation.
TABLE 2
Conventional 1H/1C, 2H/1C, 1H/2C or 2H/2C without Economizer
TABLE 3
Conventional 1H/1C, 2H/1C, 1H/2C or 2H/2C with Economizer