[Cds21] Condenser, minimum inlet temperature control
Program block, name / node subtype: [Cds21] Condenser, minimum inlet temperature control
Library hierarchy: Cooling and refrigeration equipment
Family: Cds
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Configurator
Program blocks are stored in the library without I/Os. Use the auto-create and auto-connect functions to create I/Os and/or to connect them to the interface blocks, e.g., R_A, CMD_B. Alternatively, take the I/Os from the folder containing the predefined I/Os in the library and/or from the plant and connect them to the interface blocks.
Controls a condenser with an optional pump and a mixing valve that is optimized for chiller operation.
This program block has the following optional functions:
Option: Mixing valve (1xAO, 1xAI)
Controls the position of a mixing valve (Vlv24).
If the optional mixing valve is used, it is controlled by the following function:
Temperature control for the outlet temperature (part of the option "Mixing valve").
The inlet temperature is controlled by a PID controller. The sensor value is compared to a minimum inlet temperature setpoint.
We recommend using the inlet temperature sensor.
Option: Pump (1xBO, 4xBI)
Controls a pump (Pu21). Different alternatives are possible, e.g., TwnPu21.
The pump runs when the condenser is running, and the optional shutoff valve is open.
Option: Shutoff valve (1xBO, 2xBI)
Controls a shutoff valve that opens when the condenser is running (Vlv21).
Option: Inlet temperature (1xAI)
Reads the signal from an inlet temperature.
Option: Outlet temperature (1xAI)
Reads the signal from an outlet temperature.
Option: Recooling command (1xBO)
Controls the output interface to a recooling system. It is active when the condenser is running.
Name | Description | Type | Alarm / Notification class | Trend / Type |
|---|---|---|---|---|
Pu | Pump | N/A | N/A | |
TOut | Outlet temperature | AI: Analog input | No | Yes, 2 |
TIn | Inlet temperature | AI: Analog input | No | Yes, 2 |
SpTInMin | Minimum inlet temperature setpoint | ACnfVal: Analog configuration value | N/A | No |
VlvMx | Mixing valve | N/A | N/A | |
Further elements that belong to this element: TCtr | Temperature controller | Ctr: Controller | ||||
VlvShof | Shutoff valve | N/A | N/A | |
ReCCmd | Recooling command | BO: Binary output | No | Yes, 4 |