Manual 2100-566F
Page
10 of 24
SEQUENCE OF OPERATION
Conventional 1H/1C, 2H/1C, 1H/2C or 2H/2C without Economizer
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)-THOC
(CO
2
Sensing Capability) models will activate both
G
and
A
terminals upon a ventilation call;
however, the
CS9B(E)-THOC
(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.
Conventional 1H/1C, 2H/1C, 1H/2C or 2H/2C with Economizer
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)-THOC
(CO
2
Sensing Capability) models will activate both
G
and
A
terminals upon a ventilation call;
however, the
CS9B(E)-THOC
(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.