Lennox CBX40UHV Series Installation And Service Procedure page 34

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Table 10. CBX40UV, with ComfortSense
Operating Sequence
System
Condition
Step
Normal Operation
1
- Y1
Normal Operation
2
- Y2
BASIC MODE (Only active on a Y1 thermostat demand)
Normal Operation
1
Dehumidification
2
Call
PRECISION MODE (Operates independent of a Y1 thermostat demand)
Normal Operation
1
Dehumidification
2
call
Dehumidification
1
call ONLY
BASIC MODE (Only active on a Y1 thermostat demand)
Normal Operation
1
Dehumidification
2
Call
PRECISION MODE (Operates independent of a Y1 thermostat demand)
Normal Operation
1
Dehumidification
2
call
Dehumidification
1
call ONLY
®
7000 Thermostat and Two‐Stage Outdoor Unit Operating Sequence
System Demand
Thermostat Demand
Y1
Y2
O
G
W1
W2
No Call for Dehumidification
On
On
On
On
On
On
On
Room Thermostat Calls for First-Stage Cooling
On
On
On
On
On
On
On
On
On
On
On
On
On
On
On
On
On
On
Room Thermostat Calls for First- and Second-Stage Cooling
On
On
On
On
On
On
On
On
On
On
On
On
On
On
On
On
On
On
On
On
System Response
Relative Humidity
Compre
Status
D
ssor
Acceptable
24 VAC
Acceptable
24 VAC
High
Acceptable
24 VAC
Demand
0 VAC
High
Acceptable
24 VAC
Demand
0 VAC
High
Demand
0 VAC
High
Acceptable
24 VAC
High
Demand
0 VAC
High
Acceptable
24 VAC
High
Demand
0 VAC
High
Demand
0 VAC
High
Page 34
Air
Handler
CFM
(COOL)
Comments
Low
70%
Compressor and indoor air
handler
demand
100%
ComfortSense 7000 thermo­
Low
70%
stat energizes Y2 and de-en­
ergizes D on a call for
dehumidification
70%
Note: No over cooling.
Low
70%
Dehumidification mode be­
gins when humidity is greater
70%
than set point
ComfortSense
thermostat will keep outdoor
unit energized after cooling
temperature
been reached in order to
70%
maintain
setpoint.
Note: Allow to over cool 2
from cooling set point.
ComfortSense 7000 thermo­
100%
stat energizes Y2 and de-en­
ergizes D on a call for
dehumidification
70%
Note: No over cooling.
100%
Dehumidification mode be­
gins when humidity is greater
70%
than set point
ComfortSense
thermostat will keep outdoor
70%
unit energized after cooling
temperature
been reached in order to
maintain
setpoint.
Note: Allow to over cool 2
from cooling set point.
follow
thermostat
7000
setpoint
has
room
humidity
0
F
7000
setpoint
has
room
humidity
0
F
CBX40UHV

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