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NOTE − The off portion of the selected ramp profile also ap-
plies during heat pump operation in dual fuel applications.
TABLE 17
Cooling Mode Blower Speed Ramping
Ramping Option
Switch 9 Switch 10
A (Factory) Off Off
B Off On
C On Off
D On On
Ramping Option A (Factory Selection)
D Motor runs at 50% for 30 seconds.
D Motor then runs at 82% for approximately 7−1/2 minu-
tes.
D If demand has not been satisfied after 7−1/2 minutes,
motor runs at 100% until demand is satisfied.
D 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
S Motor runs at 82% for approximately 7−1/2 minutes. If
demand has not been satisfied after 7−1/2 minutes,
motor runs at 100% until demand is satisfied.
S Once demand is met, motor ramps down to stop.
OFF
OFF
82%CFM
100% CFM
COMPRESSOR DEMAND
7 1/2 MIN
Ramping Option C
S Motor runs at 100% until demand is satisfied.
S Once demand is met, motor runs at 100% for 45 sec-
onds then ramps down to stop.
OFF
OFF
100% CFM
100% CFM
45 SEC.
COMPRESSOR
DEMAND
Ramping Option D
S Motor runs at 100% until demand is satisfied.
S 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 pro-
vides normal heat speed. Refer to table 18 for switches 11,
12 and 13 that provided the corresponding increases or de-
crease to both high and low heat demand.
TABLE 18
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
Increase 6% On Off Off
Factory Default Off Off Off
Decrease 6% Off Off On
Decrease 12% Off On Off
Decrease18% Off On On
Switches 14 and 15 −− Continuous Blower Speed −−
Table 19 provides continuous blower speed adjustments
that will result from different switch settings.
TABLE 19
Continuous Blower Speed
Continuous
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