Lennox SL280UHNV Installation Instructions Manual page 37
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Also See for SL280UHNV:
- Unit information (53 pages) ,
- Manual (50 pages) ,
- User's information manual (7 pages)
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SL280UHV, Non-Communicating Thermostat with Humidity Control Feature and Single-Speed Outdoor Unit
OPERATINg SEQUENCE
System
Step
Condition
NO CALL FOR DEHUMIDIFICATION
Normal Operation
1
BASIC MODE (only active on a Y1 thermostat demand)
Normal Operation
1
Dehumidification
2
call
PRECISION MODE (operates independent of a Y1 demand)
Normal Operation
1
Dehumidification
2
Call
Dehumidification
1
Call Only
Jumpers at indoor unit with a single stage outdoor unit. With Condensing unit
- Cut W914 (R to DS) on SureLight® control With Heat Pump - Cut W914 (R to
DS) & W951 (R to O) on SureLight® control
Dave Lennox ComfortSense® 7500 thermostat to use for this application - Y2081 4 heat / 2 cool
*Dehumidification blower speed is 70% of COOL speed for all units .
**In Precision mode, ComfortSense® 7000 thermostat will maintain room temperature up to 2 °F (1.2°C) cooler than room setting.
OPERATINg SEQUENCE
SYSTEM DEMAND
Thermostat Demand
Y1
O
g
W1
On
On
On
On
On
On
On
On
On
On
On
On
On
On
On
On
On
On
TABLE 15
Relative Humidity
Status
D
24
Acceptable
VAC
24
Acceptable
VAC
Demand
0 VAC
24
Acceptable
VAC
Demand
0 VAC
Demand
0 VAC
Page 37
SYSTEM RESPONSE
Blower
Compre
CFM
ssor
(cool)
Compressor and
High
100%
indoor blower follow
thermostat demand
ComfortSense® 7500
High
100%
thermostat energizes
Y1 and de-energizes
D on a call for de-
High
70%*
humidification
Dehumidification
High
100%
mode begins when
humidity is greater
High
70%*
than set point
ComfortSense®
7500 thermostat
will try to maintain
room humidity
High
70%*
setpoint by allowing
the room space to
maintain a cooler
room thermostat
Comments
setpoint**
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