Viessmann BW 01.A06, Installation And Service Instructions Manual

Page: 94 / 168

94
G
Lag heat pump 2
Connection at contact for "External
demand "
H Zero volt contact "External demand
"
K
Lag heat pump 3
L Central fault message input, lag
heat pump
N/C contact X3.10 / X3.11 triggers a
message.
Power supply
Isolators for non-earthed conductors
■ The mains isolator (if installed) must
simultaneously isolate all non-earthed
conductors from the power supply with
a minimum contact separation of 3
mm.
■ We additionally recommend installing
an AC/DC-sensitive RCD (RCD class
B
) for DC (fault) currents that
can occur with energy efficient equip-
ment.
■ If no mains isolator is installed, all non-
earthed conductors must be isolated
from the power supply by the upstream
circuit breaker with at least 3 mm con-
tact separation.
Danger
Incorrectly executed electrical
installations can lead to injury
from electrical current and result
in equipment damage.
Make the power supply connec-
tion and implement all protective
measures (e.g. RCD circuit) in
accordance with the following
regulations:
■ IEC 60364-4-41
■ VDE regulations
■ Technical connection require-
ments specified by your local
power supply utility
■ Protect the power supply to the
heat pump control unit with
16 A max.
Danger
An absence of component earth-
ing in the system can lead to seri-
ous injury from electrical current
if an electrical fault occurs.
Connect the appliance and pipe-
work to the equipotential bonding
of the house in question.
Installation sequence
Electrical connections
(cont.)
5600 161 GB