Model ZTWD
Programmable Thermostat with Integrated Equipment
and 2-Zone Control for Residential New Construction
Controls the equipment and automatically controls the distribution of heating and cooling to provide a balanced, uniformly comfortable home.
Eliminates Bypass.
Eliminates DAT sensor and separate 24VAC transformer.
About half the material cost of zoning.
About half the installation time of zoning.
WiFi and non-WiFi models available.
Automatic and Manual Comfort Control
Night Comfort option saves 30% in energy at night.
Typical Installation
A typical installation includes two round R80CT or rectangular RT80CT Modulating 3-Wire Dampers installed in the trunks feeding the upstairs and downstairs zones. The low cost TS510W Wired Temperature Sensor is installed in the upstairs zone and wires to the ZTWD thermostat. Optionally, two TS520W wired sensors can be installed in the upstairs zone and the temperatures are averaged. The ZTWD 2-Zone Programmable Thermostat is installed in the downstairs zone and is wired to gas/electric equipment with 1H/1C, 2H/1C or 1H/2C or heat pump equipment with 2H/1C or 1H/2C for 24VAC power and to control the equipment. The upstairs and downstairs dampers wire to the ZTWD Thermostat, each damper using a 3-wire connection.
How It Works
The ZTWD Thermostat monitors the downstairs temperatures at its location and the upstairs temperature at the sensor during heating and cooling calls. If the upstairs and downstairs temperatures differ by 2 degrees or more, the ZTWD automatically distributes 2% more heating or cooling to the zone that needs it every 2 minutes. To distribute more heating or cooling upstairs, the upstairs damper fully opens and the downstairs damper partially closes, forcing more heating or cooling to the upstairs zone. To distribute more heating or cooling downstairs, the downstairs damper fully opens and the upstairs damper partially closes, forcing more heating or cooling to the downstairs zone.
The ZTWD system dynamically adjusts the dampers to find the right distribution of heating and cooling to provide a balanced, uniformly comfortable home and save energy in every season.
