Lennox SL280UHNV - Page 22

Page 22
TABLE 8
Cooling Blower Speed Adjustment
Adjustment Switch 7 Switch 8
+10% (approx) On O󰀨
Factory Default O󰀨 O󰀨
-10% (approx) O󰀨 O󰀨
Switches 9 and 10 -- Cooling Mode Blower Speed
Ramping -- Blower speed ramping may be used to en-
hance dehumidication performance. The switches are
factory set at option A which has the greatest e󰀨ect on de-
humidication performance. Table 9 provides the cooling
mode blower speed ramping options that will result from
di󰀨erent switch settings. The cooling mode blower speed
ramping options are detailed below.
TABLE 9
Cooling Mode Blower Speed Ramping
Ramping Switch 9 Switch 10
A (Factory) O󰀨 O󰀨
B O󰀨 On
C On O󰀨
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 min-
utes.
• If demand has not been satised after 7-1/2 minutes,
motor runs at 100% until demand is satised.
• Once demand is met, motor runs at 50% for 30 sec-
onds 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 minutes,mo-
tor runs at 100% until demand is satised.
• Once demand is met, motor ramps down to stop.
OF
F
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 sec-
onds then ramps down to stop.
OF
F
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 10 for
switches 11, 12 and 13 that provided the corresponding
increases or decrease to both high and low heat demand.
TABLE 10
Heating Mode Blower Speeds
Heat Speed Switch 11 Switch 12 Switch 13
Increase 24% On On On
Increase 18% On On O󰀨
Increase 12% On O󰀨 On
Increase 6% On O󰀨 O󰀨
Factory
Default
O󰀨 O󰀨 O󰀨
Decrease 6% O󰀨 O󰀨 On
Decrease
12%
O󰀨 On O󰀨
Decrease
18%
O󰀨 On On
Switches 14 and 15 -- Continuous Blower Speed --
Table 11 provides continuous blower speed adjustments
that will result from di󰀨erent switch settings.
TABLE 11
Continuous Blower Speed
Continuous Blower Speed Switch 14 Switch 15
28% of High Cool Speed O󰀨 On
38% of High Cool Speed
(Factory)
O󰀨 O󰀨
70% of High Cool Speed On O󰀨
100% of High Cool Speed On On