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D 215 - RTR 684 C2 Eng. 14.06.00

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COSTER

B1 – Primary t° detector (0 ... 99 °C)

B2 – Primary flow limit t° detector

B3 – Primary t° detector (0 ... 40 °C)

B4 – Boiler anticondensing t° detector

B5 – Auxiliary t° detector

7. WIRING DIAGRAM

R – Remote control for modifying programmes

Rt° – Primary temperature set point adjuster

M1 – Primary circuit pump

M2 – Auxiliary circuit pump

Y1 – Primary control valve

8. SITING CONTROLLER

The controller must be sited in a dry space which meets the relevant ambiental limits shown under 4. TECHNICAL

DATA. If sited in a space classified as “Dangerous” it must be installed in a cabinet for electrical devices

constructed according to the regulations in force for the danger class involved.

The controller can be installed on a DIN rail or in a DIN modular enclosure.

9. WIRING

Proceed as follows:

• Separate base and cover

• Mount base on DIN rail and check that securing elements (5.4) hold it firmly in place.

• Carry out wiring according to the diagram and in observance of the regulations in force, using cables of :

– 1.5 mm

for power and relay control outputs

– 1 mm

for detectors and remote control

– 1 mm

for C-Ring. For limits of cable length please see technical data sheet T 022

• Switch on power (230 V ~) and check voltage across terminals L and N

• Switch off power, replace cover on base and secure it with the four screws supplied (5.3).

You are advised not to insert more than two cables in a single terminal of the controller and if necessary to use

external junction boxes.

B2B1 B4

Rt°

230 V ~

D UE

MB3

MB1

11 12 13

RTR 684

C RING

5 6 7 L L N N 8 9 10

T T

1 2

E1 E2 E3

1 2 3 4 5 6 7 8 ... 19 20

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