Lennox 16B27, Manuallines

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Page 12
4. Adjust - Used to select the indoor blower CFM
adjustment value by placing the jumper in appropriate
position.
• If NORM is selected, indoor blower runs at normal
speeds.
• If + is selected, indoor blower runs at approximately
10% higher speed than NORM setting.
• If – is selected, indoor blower runs at approximately
10% lower speed than NORM setting.
• If the jumper is missing, the air handler control will
activate the Configuration Jumper is Missing alarm
and will automatically use the default factory setting.
Actual CFM values for different air handler sizes are
shown in Targeted CFM Tables.
• Delay – Indoor blower cooling profile, delay for cool -
ing and heat pump operations.
• When operating a heat pump, delay profiles 1 and 2
are only applicable.
• When operating a heat pump, and profiles 3 and 4
are selected, the air handler control will default to
profile 1.
If the jumper is missing, the air handler control will activate
the Configuration Jumper is Missing alarm and will auto-
matically use the default factory setting.
d
elAy
p
roFile
1
A - When cool or heat demand is initiated, motor ramps
up to 100% and runs at 100% until demand is
satisfied.
B - Once demand is met, motor ramps down to stop.
A
B
OFF OFF
100%
CFM
COMPRESSOR
DEMAND
d
elAy
p
roFile
2
Cooling – Air Conditioner and Heat Pump:
A
B C
OFFF
OFF
100% CFM
100% CFM
45 SEC.
COMPRESSOR
DEMAND
A - When cool demand is initiated, motor ramps up to
100% and runs at 100% until demand is satisfied.
B - Once demand is met, motor runs at 100% for 45
seconds.
C - C Motor ramps down to stop.
Heating – Heat Pump only:
OFF
OFF
100% CFM
100% CFM
HEATING DEMAND
45 SEC.
30 sec
delay
A B
C
D
A - When heat demand is initiated, 30 seconds motor-on
delay starts
B - After the motor-on delay expires, motor ramps up to
100% and runs at 100% until demand is satisfied.
C - Once demand is met, motor runs at 100% for 45
seconds.
D - Motor ramps down to stop.
d
elAy
p
roFile
3
OFF
OFF
82%CFM
100% CFM
COOLING DEMAND
7 1/2 MIN
A
B
C
A - When cool demand is initiated, motor ramps up to
82%
B - Motor runs at 82% for approximately 7.5 minutes
and then ramps up to 100% (unless the demand has
been satisfied) and motor runs at 100% until demand
is satisfied.
C - Once demand is met, motor ramps down to stop
d
elAy
p
roFile
4
OFF
OFF
1/2 MIN
50% CFM
COOLING DEMAND
7 1/2 MIN
82% CFM
100%
CFM
1/2 MIN
50% CFM
B
A
C
D E
A - When cool demand is initiated, motor ramps up to
50%
B - Motor runs at 50% for 30 seconds and ramps up to
82%
C - Motor runs at 82% for approximately 7.5 minutes
and then ramps up to 100% (unless the demand has
been satisfied) and motor runs at 100% until demand
is satisfied.
D - Once demand is met, motor runs at 50% for 30
seconds.
E - Motor ramps down to stop
s
even
-s
egment
d
isplAy
An on-board single character display (see figure 2 for dis-
play location) indicates general system status information
such as mode of operation, indoor blower CFM and error
codes. Multi-character strings are displayed with character
ON for one second, OFF for 0.5 seconds and one second
pause between the character groups.