Verdant’s VX platform allows for master/slave control of HVAC equipment. This application is ideal in scenarios where building operators wish for two or more identical HVAC units to condition a space to the same temperature with one thermostat.

Verdant’s master/slave application can control up to seven (7) HVAC units with one thermostat. Some possible scenarios for this application include:

Conference rooms & banquet halls

Radiant & baseboard heaters serving one space

Multiple PTACs conditioning the same space

Verdant’s thermostat with lighting control (VX-TL-KT) includes a relay output that can produce a voltage signal when occupancy is detected by the onboard sensor or any other connected occupancy sensor. The voltage output is 24VAC if occupancy is detected. The thermostat has a built-in occupancy detection algorithm that avoids shorts gaps in occupancy when occupancy has been established in a room.

Once the same algorithm determines that the room is empty, the output will de-energize. The behavior of this output can be inverted, so the relay output is 24VAC when the room is unoccupied. The 24VAC output can energize or de-energize the coil of an external relay installed in the lighting circuit to interrupt the flow of power after a configurable amount of time of no occupancy.

Verdant recommends installing our thermostat facing the bedroom to determine occupancy effectively. In this position, the thermostat will maximize the savings and guest comfort by avoiding false occupancy detection. If there is a guest in the bedroom area, the thermostat will sustain the occupancy status, keeping lights ON. If the guest moves out of the detection range of the thermostat’s onboard occupancy sensor, the thermostat will start a configurable timer before changing the occupancy status and de-activating the lighting output. If the thermostat has not detected any change in room occupancy before the end of this timer, the thermostat will de-activate the output and judge the room to be unoccupied.

An external transformer, providing 24 VACS, powers the VX-TL thermostat wall unit. In order to provide early occupancy detection, the X3-NC-OS wired remote sensor should be installed close to the main door. The wired remote sensor connects to the VX-TL thermostat via a 3-pin harness connector supplied with the thermostat.

The Wireless HVAC controller is powered by a 24VAC connection available at the unit and then connected to the matching PTHP terminals (see diagram).

The lighting relay coil connects to the VX-TL’s occupancy output (located in the wall unit) through the 7-pin connector, also provided with the thermostat. Black and purple leads will provide the occupancy sensor status to the relay. This relay could be a 24VAC-coil relay like LR2401B2G from Functional Devices. Ensure the relay contacts are suitable for operation at the same voltage as the lighting units.

For bathroom lights and receptacles, use a stand-alone light switch with embedded motion detection. If the room features multiple bedrooms, additional wireless or wired occupancy sensors can be deployed and connected to the VX-TL thermostat to ensure complete occupancy coverage. This solution also allows for the installation of one or multiple balcony door or window switches to increase the savings potential and avoid possible moisture problems due to condensation of outside air humidity inside the room. Please consult Verdant for multi-sensor applications.

Verdant’s VX series includes a model that is compatible with HVAC units with digital inputs.

Verdant and Mitsubishi Electric Trane HVAC US (METUS) have forged a strategic partnership that allows Verdant thermostats to control Mitsubishi equipment without the need for 3rd party adaptors.

The VX3-RSW-MIE thermostat incorporates native connectivity with CITY MULTI® indoor VRF units and M-, P-, and Nv-Series mini-splits thereby enabling the many well-known features of the Verdant system. The thermostat connects directly to the CN105 port of the indoor unit. By using the native Mitsubishi Electric protocol, Verdant’s thermostat is capable of sending vital information to the indoor unit such as guestroom set point and actual guestroom temperature, allowing the unit to smoothly control the flow of refrigerant, reaching the desired set point with precision.

The thermostat communication with the indoor unit does not interfere with the existing communication bus between outdoor and indoor units. The thermostat communication wiring can be installed once the indoor unit has power without waiting for the completion of the main communication bus. The Mitsubishi Electric CN105 port on the indoor unit can provide the power requirements to the HVAC Controller. For convenience, the thermostat can be powered using 2 AA batteries or at 12VDC with a 2-conductor wire from terminals 11 and 12.

For a full list of compatible units, consult the specification sheet.

Verdant and LG have forged a strategic partnership that allows Verdant thermostats to control LG equipment without the need for 3rd party adaptors.

The VX3-RSW-LG thermostat incorporates native connectivity with LG indoor VRF units and mini-splits thereby enabling the many well-known features of the Verdant system. The thermostat connects directly to the CN_REMOTE port of the indoor unit. By using the native LG protocol, Verdant’s thermostat is capable of sending vital information to the indoor unit such as guestroom set point and actual guestroom temperature, allowing the unit to smoothly control the flow of refrigerant, reaching the desired set point with precision.

The thermostat communication with the indoor unit does not interfere with the existing communication bus between outdoor and indoor units. The thermostat communication wiring can be installed once the indoor unit has power without waiting for the completion of the main communication bus. The LG CN_REMOTE port on the indoor unit can provide the power requirements to the HVAC Controller. For convenience, the thermostat can be powered using 2 AA batteries or at 12VDC with a 2-conductor wire from terminals 11 and 12.

For a full list of compatible units, consult the specification sheet.

Verdant’s VX Series line of thermostats includes a wireless thermostat that can control high voltage Fan coil systems of up to 277V that are typically found in hotels.

An HVAC controller with an onboard transformer communicates to a wireless thermostat on the wall.

Note: Verdant’s high voltage thermostat kit is not suitable for baseboard heating due to the high amperage. To utilize Verdant thermostats for baseboard heaters, an external relay with a built-in transformer such as the one found here must be used.