Lennox SLP98UHV Installation Instructions Manual page 40

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 opera-
tion during the cooling mode. The table below provides the
cooling mode blower speeds that will result from different
switch settings. Refer to tables beginning on page 42 for
corresponding cfm values.
TABLE 16
Cooling Mode Blower Speeds
Speed
1 - Low
2 - Medium Low
3 - Medium High
4 - High Factory
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 switch-
es may be positioned to adjust the blower speed by +10%
or -10% to better suit the application. Table 17 provides
blower speed adjustments that will result from different
switch settings. Refer to tables beginning on page 42 for
corresponding cfm 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.
TABLE 17
Cooling Mode Blower Speed Adjustment
Adjustment Switch 10
+10% (approx.)
Default Cool CFM
- 10% (approx.)
Motor Test
Switches 12 and 13 - Cooling Mode Blower Speed Ramping
Blower speed ramping may be used to enhance dehu-
midification performance. The switches are factory set at
option A which has the greatest effect on blower motor
performance. Table 18 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 applica-
tions.
Switch 8 Switch 9
On On
Off On
On Off
Off Off
Switch 11
On Off
Off Off
Off On
On On
Cooling Mode Blower Speed Ramping
Ramping Option
A (factory)
B
C
D
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
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.
7 1/2 MIN
OFF
82%CFM
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
COOLING DEMAND
Ramping Option D
• Motor runs at 100% until demand is satisfied.
• Once demand is met, motor ramps down to stop.
OFF
Page 40
TABLE 18
Switch 12
On
Off
Off
On
7 1/2 MIN 100%
82% CFM CFM
COOLING DEMAND
100% CFM
COOLING DEMAND
100% CFM
100% CFM
45 SEC.
100% CFM
OFF
COOLING
DEMAND
Switch 13
Off
Off
On
On
OFF
1/2 MIN
50% CFM
OFF
OFF