
5 │
4 - Operation
In the thermal store, heating water is heated up from several heat sources like various types of hot-water boilers,
renewable energy sources (heat pumps, solar collectors), or electric heating elements.
The thermal store shall be connected to a heat source through G 6/4” threaded fittings. Should the tank be connected
to a solar system, this must be done via a heat exchanger because solar systems are not filled with heating water.
Individual connection points are assigned according to the circuits to be connected. There is a wide choice of combi-
nations, just some examples are described in the following chapter.
5 - Examples of ports allocation
Conn. point Example I. -solid boil. + el. Example II. - firepl. + gas boil. Example III. - heat p. + el.
H1 outlet to a heating system outlet to a heating system outlet to a heating system
B1 inlet from a solid fuel boiler outlet to a gas boiler el. heating element
U3 el. heating element plug inlet from a heat pump
44 plug plug plug
B2 inlet to a solid fuel boiler inlet to a fireplace return line to a heat pump
H2 drain valve, expansion vessel drain valve, expansion vessel drain valve, expansion vessel
U2 return line from a heating system return line from a heating system return line from a heating system
U5 plug plug plug
U1 el. heating element plug el. heating element
Psafety valve, G 1/2“, 3 bar safety valve, G 1/2“, 3 bar safety valve, G 1/2“, 3 bar
C2, C2, T, C1 sheaths for weather compensated controller, thermometer, thermostat...
Connections depend on the circuit to be connected, the a.m. examples are informative only.
Example I.
Solid fuel boiler and el. heating element.
HW
CW
E
H1
B1
U3
U4
B2
U1
U5
U2
P2
H2
PS
400 K+
PS
500 K+
PS
600 K+
PS
700 K+
PS
900 K+
PS
1100 K+
pos. connection height [mm]
heat sources
B1 G6/4" F 1365 1375 1385 1395 1415 1435
B2 G6/4" F 225 235 245 255 275 300
heating system
H1 G6/4" F 1665 1685 1705 1725 1765 1815
H2 G6/4" F 225 235 255 255 275 300
control and safety
C1 G1/2" F 1365 1375 1385 1395 1415 1435
C2 G1/2" F 515 570 535 545 565 585
C3 G1/2" F 1065 1075 1085 1095 1115 1135
TG1/2" F 1245 1255 1265 1275 1295 1315
PG1/2" F 425 425 425 425 425 445
universal inlet/outlet
U1 G6/4" F 1365 1375 1385 1395 1415 1435
U2 G6/4" F 425 425 435 445 465 490
U3 G6/4" F 985 995 1005 1015 1035 1055
U4 G6/4" F 605 615 625 635 655 675
U5 G6/4" F 1145 1155 1520 1175 1195 1220