HVAC control & monitoring enables continuous status monitoring which lies at the heart of the trend towards continuous commissioning, fault detection & post occupancy evaluation.

A common method for managing temperature within commercial and industrial facilities is through programmable thermostats connected with packaged rooftop units. Most of these thermostats are not tied to any centralized network and management application. Instead, most hvac controls operate on a standalone basis are poorly managed and therefore do not deliver sufficient energy savings. This creates an opportunity to improve how programmable thermostats are managed.

Wireless mesh sensors are ideal for both temporary & permanent hvac control & monitoring allowing sensors to be relocated easily to focus on areas of concern without the need to employ specialist skills to maintain network reliability.

 

Wireless Control of Packaged HVAC RTUs

The diagram illustrates a typical wiring configuration for the monitoring & control of a packaged roof top unit (RTU). A room installed smart wireless thermostat (WT22) communicates with the wireless device (WC21) mounted adjacent to the RTU. Care is required in the design of the solution in order to avoid undue attenuation of the wireless signal caused by the metal housing of the RTU.

Featured products – WT22, WT920

 

VAV Sensor Network

The diagram illustrates a typical arrangement for a distributed VAV network. The wireless devices at each VAV create a self-forming, self healing network which significantly reduces installation costs and ensures reliable performance. The wireless gateway (EC1) controls configuration and start up of all the terminal units. The gateway then relays control and monitoring signals to individual VAV units. Finally data from the gateway is made available for any existing energy monitoring or BMS system using industry standard protocols e.g. ModBus or RTU/RS485.

Featured products – EC1, WC21, WT22

 

WC21 Mounting Detail