Functional description

TacoTherm Dual ZEPTO

3.4 Accessory:

3.4.1 First fix rail

Fig. 19: First fix rail

3.4.2 Flushing bypass

If the section of the building is not yet ready for the installation of the

heat interface unit, a first fix rail can be installed in advance. All the

pipes are routed to this rail from below and can be filled and vented

up to the shut-off valves.

The unit is subsequently mounted on the fix rail(

Ä Chapter 5

‘Assembly’ on page 34).

By using the flushing bypass (Fig. 20), the primary circuit can be

flushed without water flowing through the heat interface unit.

The pipe connection set makes it easier to connect lines that are

guided into the unit from above. The unit is subsequently mounted on

the connecting rail (

Ä Chapter 1.2 ‘Other applicable documents’

on page 8).

When the unit is installed in a living area, the white front cover can

help integrate the unit better into the flat.

Fig. 20: Flushing bypass

3.4.3 Pipe connection set

3.5 Options

3.5.1 White front cover

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

Operating instructions

29

NOTICE!

The valves of the flushing bypass must be closed

when the unit is in normal operation.