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Installation sequence
Connecting the pumps
Secondary pump connection (DHW circulation pump)
BN
BU
Fig.3
Control unit wiring chamber
A
Secondary pump (DHW circulation pump)
B
Temperature sensors
The temperature sensors in the Vitotrans 353 are
already connected in the delivered condition.
Sensors to be connected, individual appliance:
■
S5: Additional cylinder temperature sensor for tem-
perature-dependent return stratification (optional)
Installation
Installation instructions for the heating water buf-
fer cylinder or sensor manufacturer's instructions
Connection
In accordance with system example and diagram.
8
(cont.)
GNYE
BU
BN
M
B
1~
A
Sensors to be connected, cascade:
■
S5: Additional cylinder temperature sensor for tem-
perature-dependent return stratification (optional)
S6: DHW circulation return sensor (optional)
■
Extension with recommended connecting cable: 2-core
with a cross-section of 0.75 mm
Note
Never route this lead together with 230/400 V cables.
2
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