Automation of independent heating system with two pumps, two-stage hot water supply system with two pumps

Process description and justification of measuring instrument selection

In this work, we consider the operation of the plenum ventilation system.

Automation System Functions

Control of supply air temperature depending on ambient air temperature in operating mode.

Automatic change of modes during the day and accounting of days off according to internal timer-calendar .

Automatic setting to "Winter Summer" modes by ambient temperature.

Heater control, fans on/off, air dampers open/close ("blinds").

Alarm about accidents: fan accidents, air filter contamination, breaking and closing of temperature sensors and other failures.

In case of accidents, a special control algorithm is started.

Indication of temperature, air filter pressure, state of discrete sensors, etc., as well as adjustment of parameters using the operator console built into the controller.

Let's consider one of the functions, namely control of coolant temperature in the heater.

According to the readings of the temperature sensor T3, the control effect of the heater is controlled to maintain the temperature in the channel at a given level (setpoint). Accepted parameters of heat networks 15070 ° С. The ACS calculates the difference (mismatch) between the channel temperature and the setpoint and determines the required calorifer performance.

Resistance thermometer is suitable for selected conditions

DTS224-50M.B3.43/1.5

This sensor meets our requirements and also complies with the regulatory document. [1]

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