Occupancy and Temperature Node- Temperature Influencing

|How it works

Overview

The OTN(Occupancy and Temperature Node) is part of 75F's vertically integrated suite of intelligent building solutions, delivering multi-mode sensing, remote monitoring for building occupants. The OTN(Occupancy and Temperature Node) supports Temperature influencing profile on the software side.

OTN is temperature, occupancy, humidity sensing device integrated into existing CCU as a pairable option on the floor planner.

OTN(Occupancy and Temperature Node) is a product made for those customers who needs micro zone level controls which can override the existing schedules. This comes handy in cases where there is dynamic occupancy in a space like.

• A restaurant where occupancy varies from day to day and time to time.
• Work environments post Covid19 where the employee strength is cycled, predicting which desks are occupied and which are not a new requirement to handle energy efficiency.

Advantages

Following are the reasons that make OTN stand out amongst the occupancy detectors in the market.

• OTN(Occupancy and Temperature Node) is powered by 2 x AA cells,  and hence no wiring required.
• They can communicate on 75F proprietary RF network and does not need a gateway to connect to the rest of the system.
• The product has minimal BOM and hence has value for money.
• The device can sense temperature and humidity and has mechanical buttons and can still work as a thermostat if we are not controlling anything.
• The battery life is expected to be of 2 years
• This profile does not connect/control any equipment at the terminal level. The reported temperatures influence the operation of the central plant equipment.

Operation

OTN when paired as Temperature Influencing profile does not connect/control any equipment at the terminal level. The reported temperatures, however, influence the operation of the central plant equipment. It therefore has zone status but not equipment status if it is alone.

Each OTN module can be in setback either due to vacation or daily unoccupied. When the module is in heating mode, then the setback temperature is lower than desired as determined by tuners. If the module is in cooling mode, then the setback temperature is higher than desired, as determined by tuners. If the module is in auto mode, then it has a concept of energy saving range in unoccupied time.  The temperature is allowed to drift between the heating/cooling setback points.

There is a concept of building limit breach as with the SmartNode module. There is a zone priority assigned for the OTN operation as it affects any central air handling HVAC equipment connected to the CCU. 

Once the equipment has been configured, the zone user preference can be changed from zone settings screens across portals, apps and CCU.

Multiple OTN modules cannot be paired to a single zone. Each module has a zone, building, named schedule like a regular zone. In addition, there is a zone level vacation and system vacation that affects all these temperatures influencing equipment modules.

|Configuration

From the Select Device type screen

1. Select OTN

The OTN|Select module Type screen is displayed

1. Select Temperature Influencing.

The Temperature influencing configuration screen is displayed with the following parameters.

• Zone Priority
• Auto Force Occupied
• Auto Away
• Temperature Offset

Configuration Parameters

Once the Parameter are configured.

1. Click Set to confirm the parameters set.

The Configured profile for the Temperature Influencing profile of the OTN is displayed as below.