Vedika Instruments offers PC based control technology, which has already been used successfully for almost decades in all areas of industrial automation, has become an integral component of intelligent building automation. A building management system (BMS), often known as a building automation system (BAS) and EMS often known as environment monitoring system is a computer-based control system installed in building that controls and monitors the building’s mechanical and electrical equipment such as ventilation, lighting, power system, fire system & security system. Shriji offers a universal scalable building automation control system covering PC and Ethernet based controllers and modular I/O system for logging all data points in buildings.

Application

Heating & Cooling Application.
Variable Air Volume Application.
Outdoor & Parking Garage Application.
Air Handler Application.

Heating & Cooling Application

1.     Water Mixing Valve: Three-way valves are used to mixed return & supply water and chilled and hot water together. Product used Globe with electric actuator or ball valve with electric actuator.
2.     Water Temperature monitor: Temperature sensor is inserted into the water pipeline to monitor the system supply, system return, condenser return, and condenser supply and boiler supply water temperature. Product used RTD Temperature sensor with Thermowell.
3.     Pump validation/Flow proving: Proving a pump is operating can be done in several ways. Monitor the differential pressure between upstream and downstream of the pump. Product used DP Switch. Monitor the water flow exiting the pump. Product used Flow switch. Monitor the current usage of the pump. Product used Current switch. Ensure proper differential pressure is created from sufficient flow through chiller. Product used DP Transmitter.
4.     Leak detection/Drip pan monitor: A conductivity sensor is used to detect leaks of fluid around equipment and valves or to detect full drip pans. Product used Leak detector.

Variable Air Volume Application

1.     Air Volume Control: The Amount of air added to the zone is controlled by opening and closing the air duct via a damper with a damper actuator which receives a feedback signal from a differential pressure transmitter. Product used Damper Actuator and DP transmitter.
2.     Room Temperature & Carbon Dioxide: The amount of air flow to a zone is varied based on occupancy in a zone. The occupancy is determined by the concentration of carbon dioxide in the zone. Product used Carbon Dioxide and Temperature Transmitter.
3.     Room Temperature & Humidity: A wall mounted temperature and humidity transmitter is placed in the zone to monitor the zone conditions and determine demand. Product used Rh+T Transmitter.
4.     Water Flow Control: VAV system can include heating coils of hot water that the air flows past. A zone valve is used to change the amount of hot water added to the heating coil. Zone system can include radiant heating system. A zone valve is used to change the amount of hot water added to the radiator in the zone. Product used Zone Valves 1 & 2.
5.     Duct supply Temperature: VAV duct temperature sensors measure the supply or discharge air to determine if the reheat coils are needed to condition the air entering the room. Product used RTD.

Outdoor & Parking Garage Application

1.     Outdoor humidity/temperature sensors are used for determining how much outside air to bring into the building for economizer application. Product used Humidity/Temperature Transmitters.
2.     Outdoor Temperature Sensors for low humidity regions, outdoor temperature is used to determine how much outdoor outside air can be used as free cooling. 
3.     Excess Gas Exhaust: High gas concentrations of carbon monoxide and nitrogen dioxide from vehicle exhaust are expelled from a parking garage by bringing in fresh outside air through dampers and exhausting the gas saturated air via exhaust fans. Product used Carbon Monoxide & Nitrogen Dioxide Transmitters, Process controller, Damper actuator.
4.     Exhaust Fan Validation: Proving an exhaust fan is operating in a parking garage is done by using current switches to monitor the current usage of the fan.

Air Handler Application

1.     Dirty Filter Alarm: The differential pressure loss across the filter is monitored. Product used Pressure Switch & DP Transmitter.
2.     Fan Validation: Proving a fan is operating can be done in several ways. Monitor the differential pressure between upstream and downstream of the fan. Product used Pressure switch. Monitor the air flow or velocity exiting the fan. Product used Pressure, velocity & DP Transmitters.
3.     Duct Static Pressure: A pressure transmitter is used with a static pressure tip or optional inherent static probe to monitor discharge or mixing air duct static pressures. Product used low differential switch and pressure transmitter.
4.     Duct Humidity/Temperature Sensor: A humidity/Temperature transmitter is inserted into the duct to monitor the zone discharge Humidity/Temperature. Product used Humidity/Temperature transmitter.
Frozen Coil Alarm: A differential pressure loss across the cooling coil indicates ice buildup on the coil. Product used Pressure switch.