Allied Air A97USMV Installation Instructions Manual page 46

Switches 8 and 9 - Cooling Mode Blower Speed-
The unit is shipped from the factory with the DIP switches
positioned for high speed (4) indoor blower motor operation
during the cooling mode. The table below provides the
cooling mode blower speeds that will result from different
switch settings.
Cooling Mode Blower Speeds
Switches 10 and 11 - Cooling Mode Blower Speed
Adjustment - The unit is shipped from the factory with
the DIP switches positioned for NORMAL (no) adjustment.
The DIP switches may be positioned to adjust the blower
speed by +10% or -10% to better suit the application. Table
18 provides blower speed adjustments that will result from
different switch settings. Refer to air flow tables for values.
With switches 10 an 11 set to ON, motor will bypass ramping
profiles and all delays and will immediately run at selected
COOLING speed upon a call for cool. LED will continue
to operate as normal. This mode is used to check motor
operation.
Cooling Mode Blower Speed Adjustment
Switches 12 and 13 - Cooling Mode Blower Speed
Ramping - Blower speed ramping may be used to enhance
dehumidification performance. The switches are factory set
at option A which has the greatest effect on blower motor
performance. Table 19 provides the cooling mode blower
speed ramping options that will result from different switch
settings. The cooling mode blower speed ramping options
are detailed below.
NOTE: The OFF portion of the selected ramp profile only
applies during heat pump operation in dual fuel applications.
Page 46 of 74
Table 17
Table 18
Cooling Mode Blower Speed Ramping
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 satisfied after 7-1/2 minutes,
motor runs at 100% until demand is satisfied.
• Once demand is met, motor runs at 50% for 30 sec-
onds then ramps down to stop.
Ramping Option "B"
• 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.
• Once demand is met, motor ramps down to stop.
Ramping Option "C"
• Motor runs at 100% until demand is satisfied.
• Once demand is met, motor runs at 100% for 45 sec-
onds then ramps down to stop.
Ramping Option "D"
• Motor runs at 100% until demand is satisfied.
• Once demand is met, motor ramps down to stop.
Issue 1622
Table 19
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