Lennox SL280DFNV Installation Instructions Manual page 31
Dave lennox signature gas furnace downflow air discharge
Hide thumbs
Also See for SL280DFNV:
- Unit information (51 pages) ,
- User's information manual (7 pages) ,
- Instruction manual (51 pages)
Table of Contents
Advertisement
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
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
down
to
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 switches
11, 12 and 13 that provided the corresponding increases
or decrease to both high and low heat demand.
Heating Mode Blower Speeds
Heat Speed
Increase 24%
Increase 18%
Increase 12%
Increase 6%
Factory Default
OFF
Decrease 6%
Decrease 12%
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
OFF
28% of High Cool Speed
38% of High Cool Speed
(Factory Setting)
stop.
OFF
Page 31
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
Advertisement
Table of Contents
