XL 1050
18-HD80D1-6E-EN 19
6.7 System Mode
The 1050 Control has (5) System Modes which can be
selected: Heating, Cooling, Off, Emergency Heat and Auto.
• Heating – System will only operate in heating mode
• Cooling – System will only operate in the cooling
mode
• Off – System will not operate in heating or cooling
mode
• Emergency Heating – System will operate the indoor
heat source only (this is only available when the
outdoor unit type is a heat pump)
• Auto - The 1050 Control will determine which mode of
operation based on the following rules:
• Heating - Indoor temperature is equal or less than
heating setpoint
• Cooling – Indoor temperature is equal to or greater
than cooling setpoint or within 1°F of cooling setpoint
There is minimum deadband between heating and cooling
setpoints of 3°F (4°F when zoning is applied).
6.8 Quiet Mode (VSPD Systems Only)
Quiet Mode limits compressor operation (Heating
and Cooling Mode) % Demand to meet local sound
requirements. There are two effective times that can
be adjusted. Day which starts are 9 AM and Night
which which starts at 10 PM which is required in certain
jurisdictions.
The Quiet Mode feature is available on the 1050 comfort
controls.
Charcteristics of Quiet Mode
• When active, the QM symbol will be displayed on the
1050 Home Screen.
• When enabled, Quiet Mode limits both heating and
cooling modes.
• Quiet mode may be configured to only limit Day
operation, only limit Night operation, or limit Day and
Night operation to different % demands.
• Night mode affects operation from 10 PM until 9 AM,
at which point Day settings for Quiet Mode take over.
• During heating mode, indoor supplemental heat
is allowed if the system cannot maintain space
conditions while Quiet Mode is active.
• Local code may require auxiliary heat lockout to be
configured.
NOTE: Quiet Mode is disabled by default in the homeowner
system options. The option to Disable or Enable Quiet Mode
is always available to the homeowner. This functionality
is accessed from the Home Screen by pressing System
Mode> System Options>Enable on the Quiet Mode option.
If Quiet Mode is enabled without installer setup, Night
operation allows only the minimum % Demand and Day
operation allows maximum % Demand. To optimize Quiet
Mode performance, the installing dealer must make the
changes to the setup found in the Quiet Mode Set-up
document available online.
6.9 Fan Mode
The 1050 Control has three Fan Modes:
• Auto – Fan only runs with a call for heating or cooling
• On – Fan runs continuous
• Circ – Fan runs a user selected minimum amount of
time each hour
6.10 Air Cleaner Mode
The 1050 Control has three Air Cleaner modes:
• Auto – Air cleaner operates only with a call for fan
operation
• Quick – Air cleaner will operate for 3-hours with
blower at 100%
• Allergy – Air cleaner will operate for 24-hours with
blower at 100%
Note: If a communicating Air Cleaner is installed, the power
level will be set to High during Quick and Allergy Clean
Modes.
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