eControls ZTWD21 Installation Manual

eControls
DESCRIPTION
The ZTWD thermostat controls the heating and cooling
system and the distribution of heating and cooling to the
upstairs and downstairs zones to provide a uniformly
comfortable home. The thermostat is installed in the
downstairs living zone, a temperature sensor is installed
in the upstairs bedroom zone and two modulating
dampers are installed in the ducts controlling airflow to the
upstairs and downstairs zones..
During heating and cooling calls, the ZTWD thermostat
checks the temperature at the upstairs sensor and the
temperature at the thermostat every 2 minutes and if there
o
is a 2 or more difference, the ZTWD automatically
adjusts the modulating dampers to direct more heating or
cooling to the zone that needs it for a uniformly
comfortable home.
FEATURES
SYSTEM MODES
Off, Heat or Cool
FAN MODES
Auto or On (Continuous)
THERMOSTAT MODES
Hold or Schedule
PROGRAMS PER DAY
Morning, Daytime, Evening and Night.
PROGRAM FORMAT
Weekdays and Weekend – 5/2.
TEMPERATURE OVERRIDE
Temperature is held for 3 hours when adjusted in Schedule mode.
AIRFLOW COMFORT SELECTION
Automatic Uniform Comfort
Thermostat monitors the upstairs and downstairs
temperatures and automatically adjusts the distribution of
heating and cooling to the upstairs and downstairs to keep
o
the spaces within 2 of each other. Factory default.
Upstairs Comfort Focus
More heating or cooling is directed upstairs and less to the
unoccupied downstairs, and the upstairs temperature sensor
is used to control heating and cooling calls.
Downstairs Comfort Focus
More heating or cooling is directed downstairs and less to the
unoccupied upstairs, and the thermostat is used to control
heating and cooling calls.
with Integrated Equipment and 2-Zone Control
Model A80WL2
Damper Actuator
Wireless
24VAC
24VAC,2.8VA 24VAC
Made in USA Sleeping
eControls, Inc.
Airflow %
Living
Day
Tu
AM
MENU MODE
NIGHTTIME COMFORT CONTROL
Automatically directs 30% more heating or cooling to the upstairs
sleeping zone and 30% less to the unoccupied downstairs living
zone. Upstairs sensor is used to control heating and cooling
calls. Factory set to Off.
AIRFLOW LIMITS
40% to 160%.
AIRFLOW CONTROL
Factory set to On. When set to Off, thermostat operates as a
typical thermostat controlling equipment only.
COMPATIBLE EQUIPMENT
Gas/Electric 2H/1C or 1H/2C or Conventional Heat Pump with
single stage compressor with single stage auxiliary heating.
COMPATIBLE TEMPERATURE SENSOR
(1) TS510W sensor or (2) TS520W sensors.
COMPATIBLE MODULATING DAMPERS
Model R80CT - Round damper or Model RT80CT - Rectangular
damper.
POWER
Operates on 24VAC from the HVAC equipment using the R and
C terminals. Battery back up to maintain time.
WARRANTY
5-year warranty, limited to the repair or replacement of the
product due to defective material or workmanship.
Installation Manual
Model ZTWD21 Thermostat
eControls
Cool
Set To
Schedule
COOL
Living
SYSTEM
AUTO
FAN
Patent US 10,520,212 B1
Ver409 Jan 2024
Model A80WL2
Damper Actuator
Wireless 24VAC
24VAC,2.8VA 24VAC
Made in USA
eControls, Inc.