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Speed
1 - Low
2 - Medium Low
3 - Medium High
4 - High (factory)
Table 13. 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
14 provides blower speed adjustments that will result from
different switch settings. Refer to air flow tables for values.
With switches 10 and 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.
Adjustment
+ 10%
NORMAL (factory)
- 10% (approx.)
MOTOR TEST
Table 14. 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 15 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.
Ramping Option
A (factory)
B
C
D
Table 15. 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
minutes.
•
If demand has not been satisfied after 7-1/2 minutes,
motor runs at 100% until demand is satisfied.
508364-01
Switch 8
Switch 9
On
On
Off
On
On
Off
Off
Off
Switch 10
Switch 11
On
Off
Off
Off
Off
On
On
On
Switch 12
Switch 13
Off
Off
On
Off
Off
On
On
On
•
Once demand is met, motor runs at 50% for 30
seconds 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
seconds 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.
Switches 14 through 19 - Heating Mode Blower Speed
- These switches are factory set at the OFF position,
which provides 100% of normal speed during HIGH HEAT
demand, 70% of normal speed during MIDRANGE HEAT
demand and 35% of normal speed during LOW HEAT
demand. Switches 14, 15 and 16 are used to adjust the
LOW HEAT blower motor speed. Switches 17, 18 and 19
are used to adjust the HIGH HEAT blower motor speed.
Table 16 and Table 17 provide the heating mode blower
speeds that will result from different switch settings. See
Table 19 for allowable heating speeds.
Thermostat
Demand
Adjustments
Low Heat
(R to W1)
Table 16. Low Heat Blower Speeds
Issue 2346
Blower
DIP Switch Settings
Speed
14
+ 15%
On
+ 7.5%
On
Normal
Off
- 7.5%
On
- 15%
On
15
16
Off
On
Off
Off
Off
Off
On
Off
On
On
Page 33 of 74
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