Trane US Inc. CONT8241 ユーザーズマニュアル
824 Programmable Comfort Control
18-HD72D1-1
page 31
7. Advanced Operation
7.1 Dehumidification
The 824 utilizes the following methods for dehumidification:
•
Air flow reduction – If the indoor unit has a variable
speed blower the 824 Control can reduce the system
air flow by 30% anytime the indoor RH is higher than
the cooling RH target. Air flow reduction is disallowed
if the indoor temperature is more than 2°F away from
the cooling set point. Dehumidification is enabled by
default and can be disabled by navigating to Installer
Settings>Advanced>Comfort settings.
speed blower the 824 Control can reduce the system
air flow by 30% anytime the indoor RH is higher than
the cooling RH target. Air flow reduction is disallowed
if the indoor temperature is more than 2°F away from
the cooling set point. Dehumidification is enabled by
default and can be disabled by navigating to Installer
Settings>Advanced>Comfort settings.
•
“Fan Off” delays are defeated when dehumidification
is enabled and the indoor RH exceeds the cooling RH
target.
is enabled and the indoor RH exceeds the cooling RH
target.
•
Cooling Overshoot - If cooling overshoot is enabled,
the Control will allow a .1°F of overcooling for each 1%
of RH error. When the system is actively overcooling,
Dehumidification will be displayed on the 824 home
screen. A maximum amount of overcooling can be
configured for 1°F, 2°F or 3°F. Overcooling is enabled
in Installer Settings>Advanced>Comfort settings.
the Control will allow a .1°F of overcooling for each 1%
of RH error. When the system is actively overcooling,
Dehumidification will be displayed on the 824 home
screen. A maximum amount of overcooling can be
configured for 1°F, 2°F or 3°F. Overcooling is enabled
in Installer Settings>Advanced>Comfort settings.
•
Smart Continuous Fan – If this option is enabled,
continuous fan operation will be interrupted when
indoor RH exceeds desired cooling RH target. A
humidity icon will be displayed along with the fan
icon to indicate that continuous fan operation has
been disabled due to high humidity conditions. Smart
Continuous Fan will not interrupt the fan circulate
mode. To enable this function press Menu>Fan>Smart
Continuous Fan settings.
continuous fan operation will be interrupted when
indoor RH exceeds desired cooling RH target. A
humidity icon will be displayed along with the fan
icon to indicate that continuous fan operation has
been disabled due to high humidity conditions. Smart
Continuous Fan will not interrupt the fan circulate
mode. To enable this function press Menu>Fan>Smart
Continuous Fan settings.
7.2 Warm Air Discharge
Enabling Warm Air Discharge will reduce the variable
speed blower air flow by 20% when in compressor heating
operation. Warm air discharge only applies to compressor
heating and is disabled when hydronic, fossil fuel or
electrical heat (including supplement heat) modes are
activated. Warm Air Discharge can be enabled in Installer
Settings>Advanced>Comfort settings.
speed blower air flow by 20% when in compressor heating
operation. Warm air discharge only applies to compressor
heating and is disabled when hydronic, fossil fuel or
electrical heat (including supplement heat) modes are
activated. Warm Air Discharge can be enabled in Installer
Settings>Advanced>Comfort settings.
7.3 Lockouts
7.4 Control response rate
7.5 Aux Contacts
7.4 Control response rate
7.5 Aux Contacts
The 824 has two sets of dry contacts which can be
configured to control a Humidifier, Ventilation system or a
Whole-House Dehumidifier.
configured to control a Humidifier, Ventilation system or a
Whole-House Dehumidifier.
7.6 Stand Alone Operation
Dehumidifier can operate independent from cooling
operation as long as the control is Cooling or Auto mode
and the last call was cooling.
If Stand Alone Operation is selected, the control allows
the user to select whether the indoor fan operates with
dehumidifier request.
operation as long as the control is Cooling or Auto mode
and the last call was cooling.
If Stand Alone Operation is selected, the control allows
the user to select whether the indoor fan operates with
dehumidifier request.
With Active Call for Cooling Only – Dehumidifier can only
operate during an active call for cooling.
operate during an active call for cooling.