Lennox S40 Installation And Setup Guide

33
Furnace
Table 8. Furnace Parameters
Parameter Description
About
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,
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.
Airow Prole
- Cooling
Options are:
A - ON: 50% - 30 seconds at 82% - 7-1/2 minutes at 100% and
nish cycle 50% / 30 seconds off.
B - ON: 82% - 7-1/2 minutes at 100% and nish cycle off.
C - ON: 100% - No delays; OFF: 45 seconds.
D - no delays.
Continuous Indoor
Blower Airow
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 parameter default CFM values are based on Furnace
Control (IFC) DIP switch setting (non-communicating
value) prior to power up. This dip switch 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
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.
Dehumidication
Airow %
Range is 60.0 to 80.0%. Default is 70.0%
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
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.
Table 8. Furnace Parameters
Parameter Description
Heating Airow
Control Type
Options for this setting are xed CFM or xed DAT (discharge air
temperature). Default is dependent on equipment type match-up.
Fixed CFM is selected as the Heating Airow Control Type
(parameter default selection), the circulator will operate at a CFM
that is linearly interpolated between Low Heating Airow and
High Heating Airow based on the current IFC ring rate. For
example, if the ring rate is 60% and Low Heating Airow and High
Heating Airow 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 re rate.
Fixed Discharge Air Temperature (DAT) control when selected as
Heating Airow Control Type, the IFC will vary circulator at a CFM
to maintain a set Discharge Air Temperature (DAT). For example if
the ring 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
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) – assuming 40% minimum re 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
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.
High Cooling
Airow
Range of operation of the indoor blower during high cooling
operation.
The range is dependent of indoor unit model and size. Default is
based on cooling demand with an Incremental adjustments of 25
CFM.
High Heating
Airow
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 airow
control type used.
High HP Airow Range is 800.0 to 1100.0 CFM. Default is 967.0 CFM.
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 Indoor 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.

Lennox S40 Specifications

General

Display	Color touchscreen
Voice Control	Amazon Alexa, Google Assistant
Energy Reports	Yes
Programming	7-day programmable
Warranty	5-year limited warranty
Connectivity	Wi-Fi
Compatibility	Lennox HVAC systems
Smart Features	Geofencing
Sensors	Temperature, Humidity