43
Installation scheme
Note
This scheme is a general example without shut-off
valves or safety equipment. This does not replace the
need for on-site engineering.
-1/PWM2-
WW
KW
-PWM1-
-1/PWM1-
-1/S1-
-1/S2-
-R1-
-1/R1-
-1/S6-
A
E
-PWM2-
-R2-
-1/S5-
-1/S4-
M
-PWM1-
-2/PWM1-
-2/S1-
-2/S4-
-R1-
B
-2/S2-
-PWM1-
-4/PWM1-
-4/S1-
-4/S4-
-R1-
-4/R1-
4
-4/S2-
-1/VFS/US-
-2/R1-
M
-2/VFS/US-
M
D
-4/VFS/US-
-S1-
-VFS/US-
-VBus-
-1/R2-
-S4-
-S2-
2
-S1-
-VFS/US-
-VBus-
-S4-
-S2-
-S1-
-VFS/US-
-VBus-
-S4-
-S2-
-S5-
-S6-
1
M
Fig.22
A
Vitotrans 353 with master control unit
1
B
Vitotrans 353 with slave control unit
2
C
Not shown: Vitotrans 353 with slave control
unit
3
D
Vitotrans 353 with slave control unit
4
E
Heating water buffer cylinder
1
Master control unit in the Vitotrans 353
2
Slave control unit in the Vitotrans 353
3
Not shown: Slave control unit in the
Vitotrans 353
4
Slave control unit in the Vitotrans 353
KW
Cold water
WW
DHW
PWM1 Primary pump
PWM2 Secondary pump (DHW circulation pump),
accessories
R1
Cascade valve
R2
Temperature-dependent return stratification:
Only with return distribution set, accessories
S1
Flow temperature sensor, heating water side
(
"T FL"
)
S2
DHW temperature sensor (
"TDHW"
)
S4
Cold water temperature sensor (
"T CW"
) for
switching the cascade valve
S5
Additional cylinder temperature sensor for tem-
perature-dependent return stratification (
"T
cylinder"
)
S6
Temperature sensor, DHW circulation return
(
"TDHWcircRT"
)
VBus
VBus cable: Connection of the individual con-
trol units in the cascade
!
Please note
Interchanged connections result in
incorrect data transfer.
Never interchange the cores; see
page 12.
System example
System example, cascade
(cont.)
5517 095 GB
System examples
Summary of Contents for VITOTRANS 353
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