Bedienungsanleitung Buderus MCM10 (Seite 66 von 72) (Englisch)

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Installation

MCM10

To safeguard the splashproof rating (IP): route cables so

that the cable sheath extends into the cable grommet by

at least 20 mm (Æ fig. 12).

Fig. 12 Splashproof

B Ensure connection to the correct poles (9 = negative,

10 = positive) to prevent faulty functions.

3.2.2 230 V AC connection

B Only use cable of comparable quality.

B Never connect additional controllers that regulate other

system components to outputs C (pump) and D (fault

signal).

B Recommendation when using several MCM10

modules (cascade with more than 4 boilers): provide

the additional MCM10 modules with power via the

MCM10 master module. This ensures simultaneous

commissioning.

3.2.3 Remote fault indicator connection

A remote fault indicator with acoustic or optical indication

(e.g. fault indicator) can be connected to the zero volt fault

contact (Æ fig. 3, terminals D, page 59). The state of the

fault contact is also indicated via an LED on the

MCM10 module (Æ tab. 10, page 68).

This zero volt contact carries a maximum current of 1 A at

230 V AC.

3.2.4 Electrical connection of the outside

temperature sensor

In conjunction with a heating controller with 2-wire BUS

control, connect the outside temperature sensor to the

MCM10 master module (Æ fig. 3, page 59) and not to

the boiler.

3.2.5 Electrical connection of the flow

temperature sensor

Flow temperature sensor connection (Æ fig. 3, page 59):

• System version 1: at the WM10 low loss header

module; or

• System versions 2, 3 and 4: at the MCM10 module

(terminal E).

3.2.6 Electrical connection of an external

switching contact

Prior to connecting an external switching contact, remove

the jumper from the plug-in strip.

3.2.7 Disposal

B Dispose of packaging in an environmentally

responsible manner.

B When replacing components, dispose of the used

components in an environmentally responsible manner.

3.3 Fitting accessories

B Fit accessories according to legal requirements and

the installation instructions supplied.

B Connect BUS subscribers RC35, WM10 and MM10

at terminal J (Æ fig. 3, page 59).

CAUTION: The MCM10 module input is not

fuse-protected.

Overloading the outputs can damage the

MCM10 modules.

B Fuse-protect the power supply of the

MCM master module with a maximum of

16 A.

CAUTION: Output C (pump) of the MCM10

module has a maximum load capacity of

250 W.

B Connect pumps with a higher power

consumption via relays.

The maximum power consumed by the

system components (pump, ...) must not

exceed specifications (Æ tab. 3 page 60).

7 746 800 090-07.1O

≥20 mm

Situation Contact, operating state

Power ON, no fault

Power ON, fault or no power

Tab. 9 Contact, operating states

The remote fault indicator is enabled when

the power supply to the MCM10 master

module is interrupted (function check).

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