Lennox DAVE SIGNATURE SL280DFV Installation Instructions Manual page 32
Gas furnace downflow air discharge
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Also See for DAVE SIGNATURE SL280DFV:
- Unit information (67 pages) ,
- Installation instructions manual (60 pages) ,
- Information (44 pages)
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NOTE - The off portion of the selected ramp profile also
applies during heat pump operation in dual fuel applica-
tions.
TABLE 14
Cooling Mode Speed Ramping
Ramping Option
A (factory)
B
C
D
Ramping Option A (Factory Selection)
•
Motor runs at 50% for 30 seconds.
•
Motor then runs at 82% for approximately 7-1/2
minutes.
•
If demand has not been satisfied after 7-1/2 min-
utes, motor runs at 100% until demand is satisfied.
•
Once demand is met, motor runs at 50% for 30
seconds then ramps down to stop.
7 1/2 MIN
OFF
82% CFM
1/2 MIN
50% CFM
COMPRESSOR DEMAND
Ramping Option B
•
Motor runs at 82% for approximately 7-1/2 minutes.
If demand has not been satisfied after 7-1/2 min-
utes, motor runs at 100% until demand is satisfied.
•
Once demand is met, motor ramps down to stop.
7 1/2 MIN
OFF
82%CFM
COMPRESSOR DEMAND
Ramping Option C
•
Motor runs at 100% until demand is satisfied.
•
Once demand is met, motor runs at 100% for 45
seconds then ramps down to stop.
100% CFM
OFF
COMPRESSOR
DEMAND
Switch 9
Switch 10
Off
Off
Off
On
On
Off
On
On
100%
CFM
1/2 MIN
50% CFM
100% CFM
100% CFM
45 SEC.
•
Motor runs at 100% until demand is satisfied.
•
Once demand is met, motor ramps down to stop.
OFF
Switches 11, 12 and 13 -- Heating Mode Blower Speed
-The switches are factory set to the OFF position which
provides normal heat speed. Refer to TABLE 15 for switch-
es 11, 12 and 13 that provided the corresponding increas-
es or decrease to both high and low heat demand. See
TABLE 24 on page 56 for allowable heating speeds.
Heating Mode Blower Speeds
Heat Speed
Increase 24%
Increase 18%
Increase 12%
Increase 6%
Factory Default
Decrease 6%
Decrease 12%
OFF
Decrease 18%
Switches 14 and 15 -- Continuous Blower Speed
TABLE 16 provides continuous blower speed adjustments
that will result from different switch settings.
Continuous
Blower Speed
28% of High Cool Speed
OFF
38% of High Cool Speed
(Factory Setting)
Switch 16 - Not Used
OFF
Page 32
Ramping Option D
100% CFM
COMPRESSOR
DEMAND
TABLE 15
Switch 11
Switch 12
On
On
On
On
On
Off
On
Off
Off
Off
Off
Off
Off
On
Off
On
TABLE 16
Continuous Blower Speed
Switch 14
Off
Off
OFF
Switch 13
On
Off
On
Off
Off
On
Off
On
Switch 15
On
Off
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