Lennox EL296UH070XV36B - Internal Operation; Troubleshooting Motor Operation

Page 50
NOTE - The off portion of the selected ramp prole also
applies during heat pump operation in dual fuel applica-
tions.
TABLE 14
Cooling Mode Blower Speed Ramping
Ramping Switch 9 Switch 10
A (Factory) Off Off
B Off On
C On Off
D On On
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 satised after 7-1/2 min-
utes, motor runs at 100% until demand is satised.
• Once demand is met, motor runs at 50% for 30
seconds then ramps down to stop.
OFF
OFF
1/2 MIN
50% CFM
COMPRESSOR DEMAND
7 1/2 MIN
82% CFM
100%
CFM
1/2 MIN
50% CFM
Ramping Option B
• Motor runs at 82% for approximately 7-1/2 minutes.
If demand has not been satised after 7-1/2 min-
utes, motor runs at 100% until demand is satised.
• Once demand is met, motor ramps down to stop.
OFF
OFF
82%CFM
100% CFM
COMPRESSOR DEMAND
7 1/2 MIN
Ramping Option C
• Motor runs at 100% until demand is satised.
• Once demand is met, motor runs at 100% for 45
seconds then ramps down to stop.
OFF
OFF
100% CFM
100% CFM
45 SEC.
COMPRESSOR
DEMAND
Ramping Option D
• Motor runs at 100% until demand is satised.
• Once demand is met, motor ramps down to stop.
OFFOFF
100% CFM
COMPRESSOR
DEMAND
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 16 for
switches 11, 12 and 13 that provided the corresponding
increases or decrease to both high and low heat demand.
TABLE 15
Heating Mode Blower Speeds
Heat Speed Switch 11 Switch 12 Switch 13
Increase 24% On On On
Increase 18% On On Off
Increase 12% On Off On
Increae 6% On Off Off
Factory
Default
Off Off Off
Decrease 6% Off Off On
Decrease
12%
Off On Off
Decrease
18%
Off On On
Switches 14 and 15 -- Continuous Blower Speed --
Table 17 provides continuous blower speed adjustments
that will result from different switch settings.
TABLE 16
Continuous Blower Speed
Coninuous Blower Speed Switch 14 Switch 15
28% of High Cool Speed Off On
38% of High Cool Speed
(Factory)
Off Off
70% of High Cool Speed On Off
100% of High Cool Speed On On