[DhwCtl21] Sensors, setpoints and control for domestic hot water, with storage tank

Program block, name / node subtype: [DhwCtl21] Sensors, setpoints and control for domestic hot water, with storage tank

Library hierarchy: Heating equipment

Family: DhwCtl

Project tree	Diagram

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.

Function

Controls the domestic hot water storage tank charging state.

This program block has the following optional functions:

Option: Circulation pump (1xBO, 4xBI)

Controls a pump (Pu21). The circulation pump is periodically switched on and off, e.g., 10 minutes on, 20 minutes off.

Option: Legionella prevention

Used in hot water systems to prevent the growth of the legionella bacteria or as a thermal disinfectant to kill legionella (LglPrev21).

Option: Domestic hot water temperature (1xAI)

Creates an analog input for the domestic hot water temperature and reads its signal.

Option: Overtemperature detector (1xBI)

Reads the signal from an overtemperature detector and generates an alarm.

Mandatory elements

Name	Description	Type		Alarm / Notification class	Trend / Type
DhwStk	Domestic hot water storage tank	[DhwStk21] Domestic hot water storage tank		N/A	N/A

See also

Optional elements

Name	Description	Type	Alarm / Notification class	Trend / Type
CirPu	Circulation pump	[Pu21] Pump, 1-speed	N/A	N/A
LglPrev	Legionella prevention	[LglPrev21] Legionella prevention	N/A	N/A
TDhw	Domestic hot water temperature	AI: Analog input	Yes, 8	Yes, 2
OvrTDet	Overtemperature detector	BI: Binary input	Yes, 4	No

See also