23
Equipment Parameters
Selections listed in this section are dependent on system hardware configuration. Not all options listed in this section will be available.
NOTE:
When changing the default settings for any parameter, there is a possibility that it will affect the settings for another parameter. If this happens, a pop-up
message will be displayed listing the other affected parameters and their new automatically set values.
The following is a complete list of all possible parameters listed under
System
. Parameters actually available are dependent on the Lennox communicating
equipment type detected and non-communicating equipment added.
Table 6. Smart Hub Parameters
Parameter
(In alphabetical
order)
Description
About
This screen provides information concerning language supported, equipment type name, control software revision, model, control mode number, control serial number,
control hardware revision, protocol revision number, device product level, 24VAC average power consumption, 24VAC peak power consumption, compatible devices list,
application code memory size and micro-controller part number.
Auto Changeover
- Humidif.
Deadband
Prevents the humidification and dehumidification settings from being closer together than 5% or greater than 10% (Dead-band).
Range is 5 to 10%. Default is 5%. Adjustments are in increments of 1%.
Auto Changeover -
Temp Deadband
Prevents the heating and cooling from being set closer together than 3ºF (1.67°C) or greater than 9ºF (5.0°C) (Dead- band).
Range is 3 to 9°F (1.67 to 5.0°C). Default is 3°F (1.67°C). Adjustments are in increments of 1°F (0.56°C).
Auto
Dehumidification
Overcooling
Threshold
Adjustments are in increments of 1%. This value can automatically be affected by adjusting other parameters. One example would be when enabling Max
Dehumidification Overcooling.
Range is 0 - 10%. Default is 4%.
Aux Heating
Activation
Threshold
This is an adjustment to hasten or delay the aux heat activation. This adjusts how far below the set point the temperature must fall with the HP at 100% before allowing
electric heat to come on.
Range is 0 - 10°F (0.0 to 5.56°C) with increments of 0.25°F (0.14°C). The default setting is 2.5°F (0.83°C).
Definition/Dependencies:
Step Change versus Steady State Modes
• Outdoor temperature below the high balance point or with balance points disabled.
•
Heat Pump demand above 95% for 10 minutes.
•
Sixty (60) minute temperature rise prediction = less than this Parameter Setting (value)
Result:
The Heating Proportional Integral Algorithm (as set for less, normal, or more aggressive) will begin to stage on the electric heat to bring the space temperature up to set
point.
Synopsis
: The lower this parameter is set, the quicker the auxiliary heating will respond, in both step change mode and steady state mode.
Balance Point Control
If system is set up as dual fuel or heat pump with electric heat and a outdoor temperature sensor connected to smart hub, the low and high balance point settings will appear. The balance points
feature requires that a sensed outdoor temperature is provided to the thermostat. The outdoor ambient temperature can be read from either a:
• Field-installed outdoor temperature sensor (X2658).
•
Communicating heat pump. All communicating heat pumps have a factory-installed outdoor temperature sensor.
Options are enabled or disabled. Default is disabled. When enabled, both low and high balance points can be set.
High Balance Point
This setting is used to prevent the furnace or electric heat from heating the structure. (Alert 19 - Minor - Notification only - The outdoor temperature is higher than the level
where the furnace or electric heat is programmed to heat the home.)
Range is -17 to 75°F (-27.22 to 23.89°C). Default is 50°F (10.0°C). Adjustments are in increments of 1°F (0.56°C).
