Bedienungsanleitung Nefit MZ 100 (Seite 12 von 64) (Deutsch, Englisch, Holländisch, Französisch, Italienisch, Portugiesisch, Spanisch)

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12 | Commissioning

MZ 1006 720 815 281 (2014/10)

4 Commissioning

4.1 Setting coding switch I

The function of the module is set via coding switch I.

Observe the following:

•

System with 2-port valve (S-schematic, in UK only): coding switch I to

• System with mid-position valve (Y-schematic, in UK only): coding

switch I to Y

• Example 1: 1 heating zone with 3 unmixed heating circuits:

– Module for heating circuits 1, 2 and 3 = coding switch I to 2

– Module for heating circuits 4, 5 and 6 = coding switch I to 3

• Example 2: 1 heating zone with 2 unmixed heating circuits and one

cylinder charging circuit:

– Module for heating circuits 1, 2 and cylinder charging circuit =

coding switch I to 1

– Module for heating circuits 7, 8 and cylinder charging circuit =

coding switch I to 4

The same heating circuit numbers must be set for each of the user

interfaces:

Example 3: system for 4 heating circuits and cylinder charging circuit, 2

MZ 100 modules are therefore required. The coding switches I can be

set to 2 and 4 at these 2 modules. This means heating circuits 1, 2, 3 and

7 are active. In this case, the 4 user interfaces (controllers) of the

heating circuits must also be coded to 1, 2, 3 and 7.

4.2 Setting the temperature switch II

The cylinder setpoint temperature is adjusted via temperature

switch II.

Observe the following:

• An installed user interface C 100 instead of the module specifies the

cylinder setpoint temperature via the BUS system. The module will

only specify 15 °C (frost protection) if the cylinder setpoint

temperature is less than 15 °C: temperature switch II to off (2 valid

increment positions).

• The module specifies the cylinder setpoint temperature in 5 °C

increments from 40 °C to 70 °C: temperature switch at 40 to 70.

• The module specifies 75 °C which is the maximum cylinder setpoint

temperature:

temperature switch to max (2 valid increment positions).

4.3 Commissioning of the module and the system

1. Set the function of the module via coding switch I.

2. If the cylinder setpoint temperature is specified by the module (not

with C 100): set the cylinder temperature via temperature switch II.

-or-

If the cylinder setpoint temperature is specified via a user interface

(with C 100): set temperature switch II to off.

3. If required, set the coding switch and temperature switch at

subsequent modules.

4. Switch on the power supply (mains voltage) to the entire system.

When the module indicator lights up green continuously:

5. Commission and set up the user interface as described in the

accompanying installation instructions.

First make all electrical connections correctly and only then

carry out the commissioning!

▶ Follow all installation instructions for all components

and assemblies in the system.

▶ Make sure that multiple modules do not have the same

coding.

▶ Only switch on the power supply when all modules are

set up.

NOTICE: Connected pumps can start as soon as the

system is switched on unless the control unit has

detected the module.

▶ Fill the system before switching it on so that the

pumps do not run dry.

Number of

heating

circuits

1) Information only applies for user interfaces with EMS 2, for user interfaces with

EMS plus a maximum of 4 heating circuits/zones and 2 cylinders applies

Number of

DHW systems

Coding switch I

Heating circuit

assignments for

user interfaces

(MZ 100 no. 1)

(MZ 100 no. 2)

(MZ 100 no. 3)

1-3 0 2–– 1, 2, 3

4-6 0 23– 1, 2, 3, 4, 5, 6

7-8 0 234 1, 2, 3, 4, 5, 6, 7, 8

21 1––1, 2

3-5 1 13– 1, 2, 4, 5, 6

6-8 1 234 1, 2, 3, 4, 5, 6, 7, 8

1-4 2 14– 1, 2, 7, 8

5-7 2 134 1, 2, 4, 5, 6, 7, 8

11 S

2) In UK only

– – 1

11 Y

– – 1

Table 8

WARNING: Risk of scalding!

▶ If DHW temperatures above 60 °C are set or thermal

disinfection is performed (temperature switch II

temporarily above 60 °C), a mixer must be installed.

Temperature switch II

Setpoint temperature of

cylinder

Increment position Inscription

0off10 °C (frost protection)

1–10 °C (frost protection)

24040 °C

3–45 °C

45050 °C

5–55 °C

66060 °C

7–65 °C

87070 °C

9–75 °C

10 Max. 75 °C

Table 9

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