Faults

TacoTherm Dual ZEPTO

6.

Install a new flow rate sensor (Fig. 44).

7.

Ensure that O-ring seals are available.

8.

Tighten the new flow rate sensor using an adjustable spanner.

9.

Tighten the primary hot water return line using an adjustable

spanner.

10. Restart the heat interface unit (

Ä Chapter 7 ‘Preliminary com-

missioning’ on page 42 and

Ä Chapter 8 ‘Final commissioning’

on page 45).

Fig. 44: Flow rate sensor

11.7

Replacing the temperature sensor

Personnel:

n Heating and sanitary technician

1.

Shut down the heat interface unit for a short period ( Ä Chapter

13.1 ‘Shutting down the heat interface unit for a short period

(<24 h)’ on page 60).

2.

Wait until the pipes have cooled down.

3.

To remove the temperature sensor (Fig. 45), release the M10

bolt.

4.

Remove the bolted connection with the temperature sensor.

5.

Secure the new temperature sensor and O-ring against slipping

out using an M10 bolt.

6.

Restart the heat interface unit ( Ä Chapter 14 ‘Restarting’

on page 62).

Fig. 45: Releasing the temperature

sensor

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

Operating instructions

57