32
Power supply to all accessories via heat source control unit
fÖ
fÖ
B
C
aVG
fÖ
lH
A
D
E
aVG
aVG
f-]
A
aVG
aVG
f-]
A
fÖ
aVG
aVG
f-]
A
Fig. 23
Some accessories with direct power supply
B
C
A
D
E
fÖ
fÖ
aVG
fÖ
lH
aVG
aVG
f-]
A
aVG
aVG
f-]
A
fÖ
aVG
aVG
f-]
A
Fig. 24
A
Heat source control unit
B
Extension kit for heating circuit with mixer M2
C
Extension kit for heating circuit with mixer M3
D
AM1 extension or EA1 extension
E
ON/OFF switch
fÖ
Mains input
fÖ
A Power outlet
lH
Power outlet at the control unit
aVG
KM BUS connection
If the current flowing to the connected working parts
(e.g. circulation pumps) is higher than the fuse rating
of the relevant accessory, only use the output con-
cerned to control an on-site relay.
Accessories
Internal fuse protec-
tion
Extension kit for heating circuit
with mixer
2 A
AM1 extension
4 A
EA1 extension
2 A
Power supply
fÖ
Danger
Incorrectly executed electrical installations can
result in injuries from electrical current and in
appliance damage.
Connect the power supply and implement all
safety measures (e.g. RCD circuit) in accord-
ance with the following regulations:
■
IEC 60364-4-41
■
VDE regulations
■
Connection requirements specified by your
local power supply utility
■
Install an isolator in the power cable to provide
omnipolar separation from the mains for all active
conductors, corresponding to overvoltage cate-
gory III (3 mm) for full isolation. This isolator must be
fitted in the permanent electrical installation, in line
with the installation requirements.
In addition, we recommend installing an AC/DC-sen-
sitive RCD (RCD class B
) for DC (fault) cur-
rents that can occur with energy efficient equipment.
■
Max. fuse rating 16 A.
Danger
The absence of component earthing can lead to
serious injury from electric current if an electrical
fault occurs.
The appliance and pipework must be connected
to the equipotential bonding of the building.
Installation sequence
Electrical connections
(cont.)
5773 238 GB
Installation
