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)
DMotor runs at 50% for 30 seconds.
DMotor then runs at 82% for approximately 7−1/2 minu- tes.
DIf demand has not been satisfied after 7−1/2 minutes, motor runs at 100% until demand is satisfied.
DOnce demand is met, motor runs at 50% for 30 sec- onds then ramps down to stop.
OFF |
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| 7 1/2 MIN |
|
| 100% |
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| OFF | |
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| |||||||
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| 82% CFM |
| CFM |
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| ||||
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| ||||
|
| 1/2 MIN |
|
|
| 1/2 MIN | |||||||||
|
| 50% CFM |
|
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| 50% CFM | |||||||||
COMPRESSOR DEMAND
Ramping Option B
SMotor 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.
SOnce demand is met, motor ramps down to stop.
| 7 1/2 MIN | 100% CFM |
| |
OFF | 82%CFM | OFF | ||
| ||||
| COMPRESSOR DEMAND |
| ||
Ramping Option C
SMotor runs at 100% until demand is satisfied.
SOnce demand is met, motor runs at 100% for 45 sec- onds then ramps down to stop.
100% CFM | 100% CFM | OFF |
OFF |
|
COMPRESSOR
DEMAND 
45 SEC.
Ramping Option D
SMotor runs at 100% until demand is satisfied.
SOnce demand is met, motor ramps down to stop.
OFF | 100% CFM |
OFF | |
| 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 | Switch | Switch | |
11 | 12 | 13 | ||
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Increase 24% | On | On | On | |
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Increase 18% | On | On | Off | |
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Increase 12% | On | Off | On | |
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Increase 6% | On | Off | Off | |
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Factory Default | Off | Off | Off | |
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Decrease 6% | Off | Off | On | |
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Decrease 12% | Off | On | Off | |
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Decrease18% | Off | On | On | |
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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 | Switch 14 | Switch 15 | |
Blower Speed | |||
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| ||
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| |
28% of High Cool Speed | Off | On | |
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38% of High Cool Speed | Off | Off | |
(Factory) | |||
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70% of High Cool Speed | On | Off | |
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100% of High Cool Speed | On | On | |
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Page 33
