Selection of boiler type configurations

In heating systems boilers are used in the primary heating system to cover the required heating load in buildings. Boilers can have large or small water contents and can be equipped with or without 2- or 3-way boiler valves. Boilers with a large water content can start without circulation, but boilers with a small water content cannot start without circulation. In this module 6 boiler type configurations are selectable by the parameters SYS-02 and SYS-03 as shown in the next table.

Table 2.   Boiler configuration

Configuration
SYS-02

Boiler valve

Control function

1

3-way

minimum return temperature control

2

2-way

maximum return temperature control

3

2-way

no return temperature control

Table 3.   Boiler water volume

Configuration
SYS-03

Water volume

1

large

2

small


The boiler type configurations are shown in the next figures.

SYS-02 = 1

SYS-02 = 2

SYS-02 = 3

minimum return temperature control

maximum return temperature control

no return temperature control

Fig. 1.   Boiler configurations


NOTE: For the boiler butterfly valve applications connect the output “ButFlyVlv” to obtain the required on/ off operation.