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CBX40UHV
Table 13. CBX40UV, with ComfortSense
®
7000 Thermostat and Two-Stage Outdoor Unit Operating Sequence
Operating Sequence System Demand System Response
System
Condition
Step
Thermostat Demand Relative Humidity
Compre
ssor
Air
Handler
CFM
(COOL)
Comments
Y1 Y2 O G W1 W2 Status D
No Call for Dehumidification
Normal Operation
− Y1
1 On On On Acceptable 24 VAC Low 70%
Compressor and indoor air
handler follow thermostat
demand
Normal Operation
− Y2
2 On On On On Acceptable 24 VAC High 100%
Room Thermostat Calls for First−Stage Cooling
BASIC MODE (Only active on a Y1 thermostat demand)
Normal Operation 1 On On On Acceptable 24 VAC Low 70%
ComfortSense 7000 thermo-
stat energizes Y2 and de−en-
ergizes D on a call for
dehumidification
Note: No over cooling.
Dehumidification
Call
2 On On On On Demand 0 VAC High 70%
PRECISION MODE (Operates independent of a Y1 thermostat demand)
Normal Operation 1 On On On Acceptable 24 VAC Low 70%
Dehumidification mode be-
gins when humidity is greater
than set point
Dehumidification
call
2 On On On On Demand 0 VAC High 70%
Dehumidification
call ONLY
1 On On On On Demand 0 VAC High 70%
ComfortSense 7000
thermostat will keep outdoor
unit energized after cooling
temperature setpoint has
been reached in order to
maintain room humidity
setpoint.
Note: Allow to over cool 2
0
F
from cooling set point.
Room Thermostat Calls for First− and Second−Stage Cooling
BASIC MODE (Only active on a Y1 thermostat demand)
Normal Operation 1 On On On On Acceptable 24 VAC High 100%
ComfortSense 7000 thermo-
stat energizes Y2 and de−en-
ergizes D on a call for
dehumidification
Note: No over cooling.
Dehumidification
Call
2 On On On On Demand 0 VAC High 70%
PRECISION MODE (Operates independent of a Y1 thermostat demand)
Normal Operation 1 On On On On Acceptable 24 VAC High 100%
Dehumidification mode be-
gins when humidity is greater
than set point
Dehumidification
call
2 On On On On Demand 0 VAC High 70%
Dehumidification
call ONLY
1 On On On On Demand 0 VAC High 70%
ComfortSense 7000
thermostat will keep outdoor
unit energized after cooling
temperature setpoint has
been reached in order to
maintain room humidity
setpoint.
Note: Allow to over cool 2
0
F
from cooling set point.
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