Lennox iComfort S30 Installation And Setup Manual page 34

Parameter Description
This screen provides information on unit code, language supported, equipment type name, unit model number, unit serial number, unit nominal capacity, number of
heating stages, heating capacity by stage, indoor blower CFM range, control software revision, control model number, control serial number, control hardware revision,
About discharge air temp sensor, outdoor air temp sensor, protocol revision number, device product level, factory installed transformer, 24VAC average power consumption,
24VAC peak power consumption, line voltage average power consumption, line voltage peak power consumption, compatible devices list, application code memory size
and micro-controller part number.
Options are:
A - ON: 50% - 30 seconds at 82% - 7-1/2 minutes at 100% and finish cycle 50% / 30 seconds off.
Airflow Profile
B - ON: 82% - 7-1/2 minutes at 100% and finish cycle off.
- Cooling
C - ON: 100% - No delays; OFF: 45 seconds.
D - no delays.
The range is 450 - 2000 CFM with a default setting based on equipment type match-up. Adjustments are in increments of 5 CFM.
Continuous Indoor
NOTE: All iComfort parameter default CFM values are based on Furnace Control (IFC) DIP switch setting (non-communicating value) prior to power up. This dip switch
Blower Airflow
settings are use and calculated using CFM conversion tables. They are then rounded up to closest number on 25 CFM resolution. Any DIP switch changes
made after power up are ignore.
Cooling Indoor
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.
Blower Off Delay
Cooling Indoor
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.
Blower On Delay
Dehumidification
Range is 60.0 to 80.0%. Default is 70.0%
Airflow %
Equipment Name A unique name can be assigned to this component. Name can be up to 29 characters. Name can consist of letters, numbers, special characters and spaces.
Heating Indoor
The range is 60 - 180 seconds with a default setting base on equipment type match-up. Adjustment are increments of 10 seconds.
Blower Off Delay
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 297 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 (46°C) and 130°F (54.4°C) respectively (both
Heating Airflow
parameter values are set during the IFC commission), the IFC will control the circulator to maintain a DAT at 120°F (48.9°C) (115+ (130-115) *(60-40)/(100-40)) – as-
Control Type
suming 40% minimum fire rate.
When Fix DAT is enabled, the following parameters are available:
Low Heating Discharge Temp
Range is 105 to 135°F (43.44 to 60.0°C). Adjustable in increments of 5F (2.78°C). Default is 120°F (51.67°C).
High Heating Discharge Temp
Range is 115 to 145°F (48.89 to 65.56°C). Adjustable in increments of 5F (2.78°C). Default is 130°F (57.22°C).
Heating Indoor
The range is 15 - 45 seconds with a default setting base on equipment type match-up. Adjustment are increments of 5 seconds.
Blower On Delay
Range of operation of the indoor blower during high cooling operation.
High Cooling
Airflow
The range is dependent of indoor unit model and size. Default is based on cooling demand with an Incremental adjustments of 25 CFM.
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
High Heating
Airflow
based on heating airflow control type used.
High HP Airflow
Range is 800.0 to 1100.0 CFM. Default is 967.0 CFM.
HP Indoor Blower
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.
Off Delay
Table 8. Furnace Parameters
34