Caution
The pipes must not be resting on the boiler.
Fit the horizontal parts sloping down towards the boiler, with a
gradient of 50 mm per metre.
6.6
Electrical connections
6.6.1 Recommendations
Warning
Electrical connections must always be made with the power
supply disconnected and only by qualified installers.
The boiler is completely pre-wired. Never change the internal
connections of the control panel.
Make sure you establish an earth connection before connecting
the electricity.
Establish the electrical connections in accordance with:
The instructions of the current standards.
The instructions of the wiring diagrams supplied with the boiler.
The recommendations in this manual.
Separate the sensor cables from the 230 V cables.
Caution
Outside the central heating boiler: Use 2 cables spaced at least
10 cm apart.
6.6.2 Control unit
The table gives important connection values for the control unit.
Supply voltage 230 VAC/50Hz
Main fuse value F1 (230 VAC) 2.5 AT
Danger of electric shock
The following components of the boiler are connected to a 230 V
power supply:
Electrical connection of the circulation pump
Electrical connection to gas valve unit 230 VAC or 230 RAC.
Fan
Electrical connection of the three-way valve
The majority of components in the control unit
Ignition transformer
Connection of supply cable
Automatic refill device (accessory)
The boiler has a three-wire mains lead (lead length 1.5 m) and is suitable
for a 230 VAC/50 Hz power supply with a phase/neutral/earth system. The
boiler is not phase sensitive. The power supply cable is connected to the
X01 connector in the instrument box. A spare fuse can be found in the
casing of the control unit. There is a service port for a PC/laptop next to
the control panel on the boiler.
Caution
Always order a replacement mains lead from De Dietrich. The
power supply cable should only be replaced by De Dietrich, or
by an installer certified by De Dietrich.
The boiler switch must be easily accessible at all times.
Important
All external connections can be made to the CB-03 (low-voltage)
PCB.
6 Installation
7686707 - v.01 - 06092018 AMC 37
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