Advanced Operation; Control Response Rate; Dehumidification; Dehumidifier Operation - Trane TZON1050AC52ZA Installation Manual

Installation Guide
7.

Advanced Operation

7.1

Control response rate

Allows the user to select a set of higher proportional-integral
control constants to increase the responsiveness of the
1050 Control. Selecting "Fast" will cause the 1050 Control
to generate load value at a faster rate. Control Response
rate can be adjusted in Installer Setup>Comfort Settings.
7.2

Dehumidification

The 1050 Control utilizes the following methods for
dehumidification:
• Air flow reduction (applies only to variable speed
blowers) – The 1050 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 above the
cooling setpoint. Dehumidification is factory enabled
in the Installer Setup>Comfort Settings.
All "Fan Off" delays are also defeated when
dehumidification is enabled and the indoor RH
exceeds the cooling RH target.
Overcooling [Disabled when zoning is applied]
•
(applies to variable speed and non-variable speed
blowers) - If overcooling is enabled, the 1050 Control
will allow a 0.1°F of overcooling for each 1% of RH
error. A maximum amount of overcooling can be
configured for 1°, 2° or 3°F.
EXAMPLE OF OVERCOOLING
WITH MAXIMUM CONFIGURED AT 2°
TARGET ACTUAL
HUMIDITY HUMIDITY
40% 45%
40% 55%
40% 65%
40% 70%
When the system
Dehumidification will be displayed on the 1050
Control's home screen. The maximum amount of
overcooling is configured in Installer Setup>Comfort
settings.
• Smart Continuous Fan (applies to variable speed and
non-variable speed blowers) – If 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 also interrupt the fan circulate mode when indoor
humidity exceeds the desired cooling RH. This feature
can be enabled in the Installer Settings>Comfort
Settings>Smart Continuous Fan settings.
20
PERCENT DEGREES OF
OF RH OVERSHOOT
ERROR
5% 0.5° Overshoot
15% 1.5° Overshoot
25% 2.0° Overshoot
30% 2.0° Overshoot
is actively overcooling,
7.3

Dehumidifier Operation

The 1050 Control has the ability to control a Whole-House
Dehumidifier through the normally open dry AUX Contacts
on the optional Relay Panel. Control options are:
• Stand Alone Operation – Dehumidifier can operate
independent from cooling operation as long as the
1050 Control is in Cooling mode or Auto mode and
the last call was cooling. When applied with a zoning
system, all dampers are driven full open when the
dehumidifier is operating without a call for capacity.
If Stand Alone Operation is selected, the 1050
Control allows the user to select whether the indoor
fan operates with dehumidifier request.
For systems with variable speed blowers, the blower
speed during a call for dehumidification only will be
the same as continuous fan speed
• With Active Call for Cooling Only – Dehumidifier can
only operate during an active call for cooling.
All dehumidifier control options are located in the
Installer Setup>Accessories Settings.
7.4

Dual Fuel Operation

The 1050 Control can control a dual fuel system without the
need of an external dual fuel kit. An Outdoor Temperature
Sensor must be installed and enabled for Restricted Modes
to be available. The 1050 Control options are:
• Non Restricted Mode – The 1050 Control will
determine which mode of heat will operate to maintain
comfort based on the calculated system load value.
With a load value in compressor heating range the
heat pump will operate and if the load value climbs
to auxiliary heat range, the heat pump will cycle off
and the auxiliary heat source will cycle on. Once the
load value falls below the auxiliary heat range, the
auxiliary heat will cycle off, and the heat pump will
cycle back on.
• Restricted Mode (compressor heat only) – Once
enabled an outdoor temperature lockout can be set
to disable compressor heating operation. When the
outdoor temperature falls below the compressor
heat lockout the system will operate on auxiliary
heat source only. At any temperature above the
compressor heat lockout the system will operate
the same as non-restricted mode, heat pump or
auxiliary heat would be allowed based on system
load value. Once the compressor heat is locked out,
the outdoor temperature must rise at least 4° above
the compressor heat lockout setting before allowing
compressor heat again.
18-HD80D1-3-EN