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18-HD64D1-1 15
Feature Description
History Screen
The History Screen provides system cycle information. Cycle counts and run time can be viewed
for first stage and second stage compressor operation, W1 & W2 heating and defrost cycles. This
information can be viewed in a 24 hour, 1 week or 2 week period.
Humidification
There are two options available for humidification:
Indoor RH setpoint• —this controls the humidifier based on the desired indoor humidity setpoint
(options from 10%–45%).
Frost Control setpoint• --The thermostat references the outdoor temperature and indoor envi-
ronment to calculate the risk of frost or condensation on interior walls and windows. A scale of
0 to 10 allows for customized settings based on the insulation properties of the home. A higher
number may be selected for well insulation homes, whereas a lower number should be selected
on poorly insulation homes. A lower number should be utilized if condensation is observed.
There are two control options for enabling humidification:
Humidification with an active call for heat.•
Humidification without an active call for heat (thermostat energizes blower and humidifier). •
Humidification is only available when in the heating mode (or in the auto mode when the last
call was for heating). A 60 second minimum blower off delay is enforced if “steam” humidifi-
cation is selected.
Installer Setup
There are two categories for Installer Setup.
Standard• —this is the basic system settings such as heat pump or cooling only, single or multi
stage, compressor type, etc. This is the basic system set up that is self discovered in communi-
cating mode, but requires manual input when using a Relay Panel for 24 volt configurations.
Advanced• —this provides advanced configuration of the system such as cycles per hour, mini-
mum run times, humidification and dehumidification setpoints, blower delays and temperature
lockouts to name a few of the customizable features in this set up.
Load Value
Load Value is a numerical representation of the needed capacity to satisfy the setpoint. Proportional
(distance from setpoint) error plus integral (time away from setpoint) error is used to calculate load
value.
Lockouts
System lockouts will disable a certain function of the system under specific outdoor temperatures:
Compressor Heating Lockout• – will lockout all compressor operation below a set outdoor tem-
perature (from 5°–70°). This value must be set lower than the auxiliary heat lockout.
Auxiliary Heating Lockout• – will lock out auxiliary heat stages above a set outdoor tempera-
ture (from 40°–70°). This value must be set higher than the compressor heating lockout.
Defrost Heater Balance Point• for W1, W2 & W3 – will lock out specific auxiliary heat stages
when above a set outdoor temperature. (W1 setpoint is from 40°–55°, W2 & W3 setpoints are
from 5°–55°). This feature does not apply to dual fuel systems.
Compressor Cooling First Stage Lockout• – will lock out the first stage compressor above a
set outdoor temperature. (from 80°–120°)
Compressor Heating First Stage Lockout• – will lock out the first stage compressor below a
set outdoor temperature. (from 0°–50°)
Furnace First Stage Heating Lockout• – will lock out first stage furnace operation below a set
outdoor temperature. (from 15°–50°)
First stage lockouts are not available with zoning.
Multi Systems
Multiple thermostats that control individual systems can be linked. Multiple systems can be con-
trolled from any thermostat location. A wireless home network is required for multi system function-
ality.
Photo Album
Allows the customization of a photo album screen saver. An SD card is required to view the pictures.
Photos may be in .jpg, .jpeg, .bmp, .png, or .gif file formats and must be smaller than 3 MB each.
Reminder Screens Reminders can be set for filters, UV lamps, humidifier pads, and various other service reminders.
Restore
There are three levels of restore:
Restore from the Setting Screen• – this restores all personal configurations, such as program
schedules and home screen customization to their default setting.
Reset Advanced Options from the Install Set Up screen• – this restores all the advanced set
up selections such as system lockouts, accessories, air flow and comfort options to their default
setting.
Restore Equipment Default• – this restores the thermostat to its “out of the box” condition. All
settings will be set to their factory default condition.