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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 fac-
tory with the DIP switches positioned for NORMAL (no) ad-
justment. The DIP switches may be positioned to adjust the
blower speed by +10% or −10% to better suit the application.
The table below provides blower speed adjustments that
will result from different switch settings. Refer to blower
tables at the front of this manual for corresponding cfm val-
ues. With switches 10 and 11 set to ON, motor will bypass
ramping profiles and all delays and immediately upon a call
for cool, run at COOLING speed selected. LED will continue
to operate as normal. This mode is used to check motor op-
eration.
TABLE 7
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 performance.
The switches are factory set at option A which has the great-
est effect on blower motor performance. Table 8 provides
the cooling mode blower speed ramping options that will re-
sult from different switch settings. The cooling mode blower
speed ramping options are detailed below.
TABLE 8
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 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.
OFF
OFF
1/2 MIN
50% CFM
COOLING 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 satisfied after 7−1/2 minutes, mo-
tor runs at 100% until demand is satisfied.
Once demand is met, motor ramps down to stop.
OFF
OFF
82%CFM
100% CFM
COOLING DEMAND
7 1/2 MIN
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.
OFF
OFF
100% CFM
100% CFM
DEMAND
45 SEC.
Ramping Option D
Motor runs at 100% until demand is satisfied.
Once demand is met, motor ramps down to stop.
OFF
OFF
100% CFM
COOLING
DEMAND
