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EL296UHV, Non-Communicating Thermostat with Humidity Control Feature and Two-Speed Outdoor Unit
OPERATING
SEQUENCE
System
Ste
Condition
p
Y1
NO CALL FOR DEHUMIDIFICATION
Normal Opera
1
On
tion - Y1
Normal Opera
2
On On
tion - Y2
ROOM THERMOSTAT CALLS FOR FIRST STAGE COOLING
BASIC MODE (only active on a Y1 thermostat demand)
Normal Opera
1
On
tion
Dehumidification
2
On On
Call
PRECISION MODE (operates independent of a Y1 thermostat demand)
Normal Opera
1
On
tion
Dehumidification
2
On On
call
Dehumidification
1
On On
call ONLY
ROOM THERMOSTAT CALLS FOR FIRST AND SECOND STAGE COOLING
BASIC MODE (only active on a Y1 thermostat demand)
Normal Opera
1
On On
tion
Dehumidification
2
On On
Call
PRECISION MODE (operates independent of a Y1 thermostat demand)
Normal Opera
1
On
tion
Dehumidification
2
On On
call
Dehumidification
1
On On
call ONLY
Jumpers at indoor unit with a two stage outdoor unit
Cut factory jumper from Y1 to Y2 or cut W915 (Y1 to Y2)
With Condensing unit - Cut W914 (R to DS) on SureLight
With Heat Pump - Cut W914 (R to DS) & W951 (R to O) on SureLight
Use Dave Lennox ComfortSense
*Normal operation first stage cooling blower speed is 70% COOL speed.
**Dehumidification blower speed is, reduced to 70% of COOL.
***In Precision mode, ComfortSense
OPERATING SEQUENCE
SYSTEM DEMAND
Thermostat Demand
W
W
Y2
O
G
1
2
On
On
On
On
On
On
On
On
On
On
On
On
On
On
On
On
On
On
On
On
On
On
On
On
®
7000 thermostat Y2081 4 heat / 2 cool for this application.
®
7000 thermostat will maintain room temperature up to 2 °F (1.2°C) cooler than room setting.
TABLE 13
Relative Humidity
Compressor
Status
D
24
Acceptable
Low
VAC
24
Acceptable
High
VAC
24
Acceptable
Low
VAC
0
Demand
High
VAC
24
Acceptable
Low
VAC
0
Demand
High
VAC
0
Demand
High
VAC
24
Acceptable
High
VAC
0
Demand
High
VAC
24
Acceptable
Low
VAC
0
Demand
High
VAC
0
Demand
High
VAC
®
control
Page 40
SYSTEM RESPONSE
Blower
Comments
CFM
(COOL)
70%*
Compressor and indoor
blower follow thermostat
demand
100%
ComfortSense
70%*
thermostat energizes Y2
and de-energizes D on a
70%**
call for de-humidification
70%*
Dehumidification mode
begins when humidity is
greater than set point
70%**
ComfortSense
thermostat will try to
maintain room humidity
70%**
setpoint by allowing the
room space to maintain
a cooler room thermostat
setpoint***
ComfortSense
100%
thermostat energizes Y2
and de-energizes D on a
70%**
call for de-humidification
70%*
Dehumidification mode
begins when humidity is
greater than set point
70%**
ComfortSense
70%**
thermostat will try to
maintain room humidity
setpoint by allowing the
room space to maintain
a cooler room thermostat
setpoint***
®
control
®
7000
®
7000
®
7000
®
7000
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