Lennox iComfort S30 Installation And Setup Manual page 31

Airflow Profile - Cooling
Options are:
S
A - ON: 50% - 30 seconds at 82% - 7-1/2 minutes at 100% and finish cycle
50% / 30 seconds off.
S
B - ON: 82% - 7-1/2 minutes at 100% and finish cycle off.
S
C - ON: 100% - No delays; OFF: 45 seconds.
S
D - no delays.
High HP Airflow
Range is 800.0 to 1100.0 CFM. Default is 967.0 CFM.
Continuous Indoor Blower Airflow
The range is 450 - 2000 CFM with a default setting based on equipment type
match-up. Adjustments are in increments of 5 CFM.
NOTE - All communicating installer parameters default CFM values based on
DIP switch setting (non-communicating value) prior to power up are use and
calculated using the CFM conversion tables and rounded up to closest number
on 25 CFM resolution. Any DIP switch changes made after power up are
ignore.
Dehumidification Airflow %
Range is 60.0 to 80.0%. Default is 70.0%
Heating Indoor Blower Off Delay
The range is 60 - 180 seconds with a default setting base on equipment type
match-up. Adjustment are increments of 10 seconds.
Heating Indoor Blower On Delay
The range is 15 - 45 seconds with a default setting base on equipment type
match-up. Adjustment are increments of 5 seconds.
Cooling Indoor Blower Off Delay
The range is 0.0 - 30.0 seconds with a default setting base on equipment type
match-up. Adjustment are increments of 10 seconds. Default is 0.0 seconds.
Cooling Indoor Blower On Delay
The range is 0.0 - 10.0 seconds with a default setting base on equipment type
match-up. Adjustment are increments of 1 second. Default is 2.0 seconds.
HP Indoor Blower Off Delay
The range is 0.0 - 60.0 seconds with a default setting base on equipment type
match-up. Adjustment are increments of 5 seconds. Default is 45.0 seconds.
HP Blower On Delay
The range is 0.0 - 30.0 seconds with a default setting base on equipment type
match-up. Adjustment are increments of 5 seconds. Default is 0.0 seconds.
Heating Airflow Control Type
Options for this setting are fixed CFM or fixed DAT (discharge air temperature).
Default is dependent on equipment type match-up.
Fixed CFM is selected as the Heating Airflow Control Type (parameter default
selection), the circulator will operate at a CFM that is linearly interpolated
between Low Heating Airflow and High Heating Airflow based on the current
IFC firing rate. For example, if the firing rate is 60% and Low Heating Airflow
and High Heating Airflow were set to 500 CFM and 900 CFM respectively (both
parameter values are set during the IFC commission), the circulator will run at
633 CFM (= 500+ (900-500) *(60-40)/(100-40)) – assuming 40% minimum fire
rate
Fixed Discharge Air Temperature (DAT) control when selected as Heating
Airflow Control Type, the IFC will vary circulator at a CFM to maintain a set
Discharge Air Temperature (DAT). For example if the firing rate is 60% and
Low Heating DAT and High Heating DAT were set to 115°F and 130°F
respectively (both parameter values are set during the IFC commission), the
IFC will control the circulator to maintain a DAT at 120°F (115+ (130-115)
*(60-40)/(100-40)) – assuming 40% minimum fire rate.
When Fix DAT is enabled, the following parameters are available:
Parameter Name
Low Heating Discharge Temp
High Heating Discharge Temp
Low Heating Airflow
Both range and default setting is based on equipment type match-up.
Adjustments are in increments of 25 CFM. This value is automatically adjusted
by the system based on heating airflow control type used.
High Heating Airflow
Both range and default setting is based on equipment type match-up.
Adjustments are in increments of 25 CFM. This value is automatically adjusted
by the system based on heating airflow control type used.
Reset Furnace
Any installer modifications under the furnace tab will be reset back to the factory
defaults if the reset furnace option is used.
31
Description
Range is 105 to 135°F. Adjustable
in increments of 5F. Default is
120°F.
Range is 115 to 145°F. Adjustable in
increments of 5F. Default is 130°F.