Manual Buderus MC 400 (page 11 of 88) (English, German, Dutch, French, Italian, Portuguese, Spanish)

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Contents | 11

6 720 816 739 (2015/05)MC 400

Contents

1 Key to symbols and safety instructions . . . . . . . . . . . . . . . . . 11

1.1 Key to symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

1.2 General safety instructions . . . . . . . . . . . . . . . . . . . . . . 11

2 Product details . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

2.1 Important information on use . . . . . . . . . . . . . . . . . . . . 12

2.2 Function description / control strategies . . . . . . . . . . . 12

2.2.1 Serial standard cascade . . . . . . . . . . . . . . . . . . . . . . . . 12

2.2.2 Serial optimized cascade . . . . . . . . . . . . . . . . . . . . . . . 12

2.2.3 Serial cascade with peak load coverage . . . . . . . . . . . . 12

2.2.4 Parallel cascade . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

2.2.5 Output control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

2.2.6 Flow temperature control . . . . . . . . . . . . . . . . . . . . . . . 13

2.3 Setting the coding card . . . . . . . . . . . . . . . . . . . . . . . . . 13

2.4 Scope of delivery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

2.5 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

2.6 Additional accessories . . . . . . . . . . . . . . . . . . . . . . . . . 14

2.7 Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

3 Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

3.1 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

3.2 Electrical connection . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

3.2.1 Connecting the BUS connection and temperature

sensor (extra-low voltage side) . . . . . . . . . . . . . . . . . . .14

3.2.2 Connecting the power supply, pump and mixer

(mains voltage side) . . . . . . . . . . . . . . . . . . . . . . . . . . . .15

3.2.3 Connection diagrams with system schematics . . . . . . 15

3.2.4 Overview of the terminal assignment . . . . . . . . . . . . . . 16

4 Commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

4.1 Setting the coding card . . . . . . . . . . . . . . . . . . . . . . . . . 17

4.2 System and module commissioning . . . . . . . . . . . . . . . 17

4.2.1 Settings for systems with a cascade module in the

BUS system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17

4.2.2 Settings for systems with two or more cascade

modules in the BUS system . . . . . . . . . . . . . . . . . . . . . .17

4.3 Status display for the heat source/subordinate

cascade modules on the subordinate cascade

module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17

4.4 Status display for the heat source on the

subordinate cascade module . . . . . . . . . . . . . . . . . . . . .17

4.5 Cascade settingsmenu . . . . . . . . . . . . . . . . . . . . . . . . . 18

4.6 Diagnosismenu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

5 Eliminate fault . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

5.1 Status indicator on the individual installed or

higher-level cascade module . . . . . . . . . . . . . . . . . . . . .19

5.2 Status indicator on the lower-level cascade

module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19

6 Environment / disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Installation instructions for skilled labour

1 Key to symbols and safety instructions

1.1 Key to symbols

Warnings

The following keywords are defined and can be used in this document:

• NOTICE indicates a situation that could result in damage to property

or equipment.

• CAUTION indicates a situation that could result in minor to medium

injury.

• WARNING indicates a situation that could result in severe injury or

death.

• DANGER indicates a situation that will result in severe injury or

death.

Important information

Additional symbols

1.2 General safety instructions

These installation instructions are intended for a competent person.

▶ Read the installation instructions (heat appliances, modules, etc.)

before installation.

▶ Observe safety instructions and warnings.

▶ Observe national and regional regulations, technical rules and

guidelines.

▶ Keep a record of any work carried out.

Determined use

▶ Use the product only to control heating systems with cascade

systems. In a cascade system, several heat sources are used to

achieve greater heat output.

Any other use is considered inappropriate. Any damage that may result

is excluded from liability.

Installation, commissioning and maintenance

Installation, commissioning and maintenance must only be carried out

by a competent person .

▶ Never install the product in wet rooms.

▶ Only install genuine spare parts.

Electrical work

Electrical work must only be carried out by qualified electricians.

Warnings in this document are identified by a warning

triangle printed against a grey background.

Keywords at the start of a warning indicate the type and

seriousness of the ensuing risk if measures to prevent

the risk are not taken.

This symbol indicates important information where

there is no risk to people or property.

Symbol Explanation

▶ Step in an action sequence

 Cross-reference to another part of the document

• List entry

– List entry (second level)

Table 1

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Buderus MC 400 Manual

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