TacoTherm Dual ZEPTO

Faults

4.

5.

6.

7.

8.

Collect the remaining water using a cloth.

Install a new backflow preventer.

Ensure that O-ring seals are available.

Tighten the new backflow preventer using an adjustable

spanner.

Restart the heat interface unit ( Ä Chapter 7 ‘Preliminary com-

missioning’ on page 42 and

Ä Chapter 8 ‘Final commissioning’

on page 45).

11.6

Replacing the flow rate sensor

Personnel:

Protective equipment:

Tool:

Material:

n Heating and sanitary technician

n Protective gloves

n Adjustable spanner

n Spare parts

n Cloth

1.

2.

3.

4.

5.

Close the main shut off valve (Fig. 43/1) for the supply line to

the backflow preventer to ensure no more water can flow

through the backflow preventer.

Fig. 43: Replacing the flow rate sensor

If the pipe section is one through which hot water flows, wait

until the pipe section has cooled down.

Release the bolted connection for the flow rate sensor

(Fig. 43/2) using an adjustable spanner.

Remove the flow rate sensor.

Collect the remaining water using a cloth.

56

Operating instructions

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

Observe the flow chart ( Ä Chapter 3.1 ‘Circuits

and connection points in the heat interface

unit’ on page 23).

WARNING!

Risk of burns due to hot pipes!