Lennox EL297DFV Series Unit Information page 28

NOTE - In heat pump mode blower operation defaults to
option c.
TABLE 7
Cooling Mode Blower Speed Ramping
Ramping
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 factory default heat speed. Refer to TABLE 8 for
switches 11, 12 and 13 that provided the corresponding
increases or decrease to both high and low heat demand.
Heat Speed
Increase 24%
Increase 18%
Increase 12%
Increase 6%
Factory
OFF
Default
Decrease 6%
Decrease
12%
Decrease
18%
Switches 14 and 15 -- Continuous Blower Speed --
TABLE 9 provides continuous blower speed adjustments
that will result from different switch settings.
OFF
Continuous Blower Speed
28% of High Cool Speed
38% of High Cool Speed
(Factory Setting)
Switch 16 - Not Used
OFF
Page 28
Ramping Option D
100% CFM
COMPRESSOR
DEMAND
TABLE 8
Heating Mode Blower Speeds
Switch 11 Switch 12
On On
On On
On Off
On Off
Off Off
Off Off
Off On
Off On
TABLE 9
Continuous Blower Speed
Switch 14
Off
Off
OFF
Switch 13
On
Off
On
Off
Off
On
Off
On
Switch 15
On
Off