Preliminary commissioning

TacoTherm Dual ZEPTO

Fig. 30: Ball valves closed

Filling the heat interface unit

Filling the secondary circuit for

drinking water distribution

Fig. 31: Opening the fresh water ball

valve

Personnel:

n Heating and sanitary technician

Prerequisites:

n The heat interface unit has been installed and connected in

accordance with Ä Chapter 5 ‘Assembly’ on page 34.

n The water quality has been tested and found to be good.

1.

Ensure that all ball valves (Fig. 30) are closed.

2.

Check the tightness of all bolted connections and retighten if

necessary.

3.

To fill the heat interface unit, open the main supply line for

fresh water outside the heat interface unit.

4.

Slowly open the main supply line for cold water (Fig. 31/1).

ð The secondary circuit fills up.

5.

Open the hot water distribution connection (Fig. 31/2).

6.

In order to flush and bleed the lines, open the taps.

ð The drinking water system (hot) is filled, flushed and bled.

7.

ð The primary circuit fills up.

8.

Open the primary connection for the heat supply return line

(Fig. 32/1).

Filling the primary circuit

Fig. 32: Opening the ball valve for the

heating supply and heating return

V03 06/2025 Item no. 215250 EA no. 1292

Operating instructions

43

WARNING!

Risk of burns due to hot pipes!

Open the primary connection for the heat supply flow line

(Fig. 32/2).