Switches8 and 9 -- Cooling Mode Blower Speed --
Switches 8 and 9 are used to select cooling blower motor
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 pro-
vides the cooling mode blower speeds that will result from
different switch settings Refer to tables 21 through 31 for
corresponding cfm values
TABLE 14
Cooling Mode Blower Speeds
Speed Switch 8 Switch 9
1 - Low On On
2 - Medium Low Off On
3 - Medium High On Off
4- High (Factory) Off Off
Switches 10 and 11 -- Cooling Mode Blower Speed Ad-
justment -- Switches 10 and 11 are used to select blower
speed adjustment settings 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 ap-
plication Table 15 provides blower speed adjustments that
will result from different switch settings Refer to tables 21
through 31 for corresponding cfm values
With switches 10 and 11 set to ON, motor will bypass ramp-
ing profiles and all delays and will immediately run at se-
lected COOLING speed upon a call for cool LED will con-
tinue to operate as normal This mode is used to check
motor operation
TABLE 15
Cooling Mode Blower Speed Adjustment
Adjustment Switch 10 Switch 11
+10% (approx) On Off
NORMAL (Factory) Off Off
-10% (approx) Off On
MOTOR TEST On On
Switches 12 and 13 -- Cooling Mode Blower Speed
Ramping -- Switches 12 and 13 are used to select cooling
mode blower speed ramping options Blower speed ramp-
ing may be used to enhance dehumidification perfor-
mance The switches are factory set at option A which has
the greatest effect on blower motor performance Table 16
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 ap-
plies during heat pump operation in dual fuel applications
TABLE 16
Cooling Mode Blower Speed Ramping
Ramping Option Switch 12 Switch 13
A (Factory) Off Off
B On Off
C Off On
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 minu-
tes
• 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
__ 7 1/2 MIN .__ 100% --D,._
OFF 82% CFM CFM OFF
1/2 MIN
50% CFM
i_ COOLING DEMAND
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
(
,_p 7 1/2 MIN _ 100% CFM
OFF 82%CFM /
COOLING DEMAND --"IP"
OFF
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
_._p-- lOO% CFM --
OFF OFF
-- DEMAND
Ramping Option D
• Motor runs at 100% until demand is satisfied
• Once demand is met, motor ramps down to stop
100% CFM _OFF
COOLING
DEMAND
Page 35
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