MCZ HydroTherm 70 [20/45] Electrical connection of the control unit mcz

INSTALLATION AND USE MANUAL

Chapter 4

page 20

4.5.2. Electrical connection of the control unit MCZ

The thermal adjuster is made up of:

 Recessed control unit.

 Fruit box.

 Thermal probe and well (included in the supply)

For correct operation and to avoid any damage to electrical/electronic

parts:

 Place the device in a dry place far from direct heat sources.

 Place the PROBE by using the specific manifold (optional) in a

way to read the correct temperature of the boiler, avoiding

direct or indirect contact with the flame.

 Place the container-box without the control unit body.

The installation and the electrical connections must

be made by a qualified electrician using adequate

equipment.

Connection to the power supply network must be

made only after connecting the wires in the terminal

board.

LINE

Connect the 230 Vac 10% -~50 Hz electric line to the terminal boards

[1] and [2] to power the control unit. Protection fuse T3.15 A

INPUTS (I)

Probe: Connection to the probe of the fireplace stove that detects the

system temperature.

Temperature range 0 – 100 °C

Flux: ON/OFF permission for the connection of a flow switch or

thermostat of a boiler for domestic hot water

OUTPUTS (U)

Pump: Connection of the water circulation pump in the heating

system. Terminals [3] and [4]

Valv: Connection of a possible 2/3 wire solenoid valve serving as

domestic valve. Terminals [5] [6] and [7]

Aux: Auxiliary connection to connect a gas boiler to control the

shutdown. Terminals [8] [9] and [10]

P2: Connection to the domestic hot water circulation pump.

Terminals [11] and [12]