34
Connections (without connection accessories)
A
Heating flow G ¾
B
Gas connection G ¾
C
Condensate drain
D
Drain safety valve
E
Heating return G ¾
F
Plug for junction box, sensors and
accessories
G
Power cable
On-site preparation of the gas, water and
electrical connections:
Note
Observe the requirements of
DIN VDE 0100.
1. Prepare the water connections. Flush
the heating system.
Note
Fit the expansion vessel to the heat-
ing return.
2. Prepare gas connection to TRGI [or
local regulations].
3. Prepare electrical connections.
Information on the power supply
■ The power supply for the
Vitotwin 300-W must have sepa-
rate MCB/fuse protection.
Connect the power supply directly
from the distribution board as per
connection conditions of your
power supply utility and VDE 0100
[IEE or local wiring regulations], not
from a final consumer circuit. Never
connect the appliance via a plug-in
connection. Observe national reg-
ulations.
■ The appliance is supplied with a
FLEX-JB 3 x 2.5 mm
2
power cable.
Install power supply socket on site.
Preparing for installation
Preparing for installation
(cont.)
5618 294 GB
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