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5.2
Hydraulic connection
DANGER: Risk of fire from soldering and welding!
▶ As far as possible, carry out any soldering and welding
work before fitting the thermal insulation.
▶ Take appropriate safety measures when soldering and
welding, since the thermal insulation is combustible;
for example, cover the thermal insulation.
▶ Check the integrity of the thermal insulation after
completing work.
DANGER: Risk to health through contaminated water!
Fitting work carried out without due care for cleanliness
can result in contamination of the potable water.
▶ Install and equip the DHW cylinder hygienically and in
accordance with national standards and guidelines.
▶ Flush the DHW cylinder and pipework thoroughly with
potable water after fitting.
So that later damage to the DHW cylinder is prevented:
▶ Use metal connectors in potable water heating systems with plastic
pipes.
▶ Use installation material that is temperature-resistant at 95 °C.
▶ Use only screw fittings, and with shut-off valves if required, for all
connection pipes to the cylinder.
▶ Install an air vent valve in the DHW line upstream of the shut-off valve.
▶ Install the drain provided by the customer to the bottom cylinder
connection.
▶ In order to facilitate blow-down, never install elbows in the drain
pipe.
▶ Fit all connection pipes in such a way that they are free of tension.
Logalux LTN/LTD/LTH/LF 400...3000 – 6 720 818 806 (2015/12)
▶ Seal off all cylinder connections that are not used.
Fig. 6
Connection diagram for hydraulic connection
[1]
Storage cylinder
[2]
Air vent valve
[3]
Shut-off valve with drain valve
[4]
Pressure relief valve
[5]
Non-return valve
[6]
Shut-off valve
[7]
DHW circulation pump
[8]
Pressure reducer (if required)
[9]
Test valve
[10] Non-return component
[11] Pressure gauge connector
[12] Drain
To ensure that the cylinder can be drained quickly, use
the same connection diameter for the tee on the cold
water inlet and drain connector (EK/EL).
▶ If there is an arrangement of several DHW heaters, make the
connections for both domestic hot water and heating water in
parallel in accordance with the Tichelmann system ( Fig. 7,
page 12).
Fitting
5
11
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