Viessmann EM-EA1 Installation And Service Instructions Manual page 7

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Power supply

Connect the power supply and

implement all safety measures

(e.g. RCD circuit) in accordance

with the following regulations:

■ IEC 60364-4-41

■ VDE regulations

■ Technical connection require-

ments (TAB) specified by the

local grid operator

Danger

The absence of system compo-

nent earthing can lead to seri-

ous injury from electric current if

an electrical fault occurs.

The appliance and pipework

must be connected to the equi-

potential bonding of the building.

(cont.)

Isolators for non-earthed conductors

■ The mains isolator (if installed) must

simultaneously isolate all non-

earthed conductors from the mains

with a minimum contact separation of

3 mm.

■ If no mains isolator is installed, all

non-earthed conductors must be iso-

lated from the power supply by the

upstream circuit breaker with a mini-

mum contact separation of 3 mm.

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