Model ZTWD
Programmable Thermostat w/ Integrated 2-Zone Comfort Control for RNC
Provides a Balanced, Comfortable Home and Energy Savings at About Half the Cost and an Easier Installation
No Bypass
Integrated Comfort Solution
Comfort & Energy Savings
The ZTWD Thermostat controls the activation of heating and cooling calls, and automatically controls the distribution of heating and cooling based on the zone temperatures to provide whole home comfort and energy savings.
Eliminates bypass damper and duct.
Eliminates separate 24VAC transformer.
Eliminates DAT sensor.
Eliminates zoning panel.
Eliminates second thermostat.
Only 1 HERS test is required.
Compatible with gas/electric equipment with 1H/1C, 2H/1C or 1H/2C or heat pump equipment with single stage compressor heating and single stage auxiliary heating.
WiFi and Non-WiFi models available.
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 dampers are wired to the ZTWD Thermostat subbase.
The low cost TS4B Wired Temperature Sensor is installed in the upstairs zone and wires to the ZTWD Thermostat subbase. Optionally, two TS4B2 Temperature Sensors can be installed 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 to heat pump equipment with single stage compressor and single stage auxiliary heating for 24VAC power and to control the equipment.
How It Works
The ZTWD Thermostat monitors the downstairs temperature 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 whole home comfort and energy savings in every season.
