Water Side Piping Connections - Buderus Logalux PL750 Installation And Maintenance Instruction

4.3

Water Side Piping Connections

Danger: Fire danger due to soldering and
welding!
V Take proper precautionary measures dur-
ing soldering and welding, as the insula-
tion material is combustible.
V Check the insulation following work for ir-
regularities.
Danger: Scalding due to excessively hot wa-
ter!
During solar operation, the domestic hot wa-
ter can reach 194 °F (90 °C) temperature. A
thermostatic mixing valve must be placed on
the DHW tank outlet to avoid scalding
through proper adjustment.
V Install a thermostatic mixing valve between
the hot water outlet and cold water inlet
connections when using the PL750/2 S
tank for solar applications.
Buderus supplies a thermostatic mixing
valve as part of the solar pump station. It is
not a part of the solar combi-tank.
Caution: Water damage.
V Install tank drain and other accessories
prior to filling the tank.
V Cap off all connections not in use.
Caution: Be careful not to damage non heat
resistant surfaces (e.g. PEX tubing).
V Use installation materials that can handle
temperatures in excess of 176 °F (80 ° C).
Logalux PL750/2 S - Changes may be made following technical improvements!
14
4
6
AW EZ
1
6
EL EK
13
15
12
Fig. 13 Piping Connections (Basic diagram)
1 DHW tank
2 Drain valve
3 Insolation valve with drain tapping
4 P & T valve (combined with DHW outlet connection)
5 Flow check valve
6 Isolation valve
7 Bronze DHW recirc pump (optional)
8 Pressure reducer
9 Measuring port
10 Flow check valve
11 Pressure gauge connection
12 Drain valve DHW
13 Relief valve discharge line
14 Thermostatic mixing valve (3-way tempering valve)
15 Thermal expansion tank
AW DHW outlet
EK Cold inlet connection
EL Tank drain connection
EZ DHW recirc connection
4
Tank Assembly
2 3
AW
EZ
5 7 6
11 10
8 6
EK
9
6 720 615 217-11.1RS
15