System Example - Viessmann VITOTRANS 353 Installation And Service Instructions Manual

System example, individual appliance
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.
A
C
M
B
C
Fig. 20 Type PBS
A Vitotrans 353
Control unit in the Vitotrans 353
B
Heating water buffer cylinder
C
KW Cold water
WW DHW
PWM1 Primary pump
PWM2 Secondary pump (for type PBS: Only with
DHW circulation set, accessories)
R2 3-way diverter valve of return distribution set
Type PBS:
Return distribution set, accessories (3-way
diverter valve)
Type PZS:
3-way diverter valve integrated in the appli-
ance in the delivered condition
(cont.)
B
-S4-
-S6-
-R2-
-PWM2-
WW
-PWM1-
-S1-
-S2-
-VFS/US-
A
KW
S1 Flow temperature sensor, heating water side
("T FL")
S2 DHW temperature sensor ("TDHW")
S4 Temperature sensor, cold water or DHW circu-
lation return ("T CW"/"TDHWcircRT")
S5 Optional: Additional cylinder temperature sen-
sor for temperature-dependent return stratifica-
tion ("T cylinder")
Type PBS/PBM/PBL: Part of the return distri-
bution set, accessories
Type PZS/PZM: Standard delivery
S6 Optional: Temperature sensor, DHW circula-
tion return

System example

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