Viessmann Vitodens 200-W B2HA 88 Technical Data Manual page 33

Vitodens 200-W B2HA 88-150, 311- 530 Technical Data
Accessories for Vitodens 200-W
Low-Loss Header (continued)
Low-loss header design (Type 80/60 or 120/80)
Principle of Operation
(continued)
IMPORTANT
Use only a Viessmann supplied temperature sensor. Do
not use any other manufacturer's temperature sensor.
Legend
AB Air Bleed
BR Boiler Return
BS Boiler Supply
BY Bypass (with laminar flow)
D Debris and/or air
DV Drain Valve
SC Sensor Cable
SR System Return
SS System Supply
TS Viessmann Temperature Sensor
SW Sensor Well
IMPORTANT
When installing a low-loss header, the system mixed
supply temperature (T3) must be calculated as follows:
Legend
T1
T2
T3
T4
Vprimary
Vsecondary
Vbypass
Qprimary
Qsecondary
Vprimary < Vsecondary
T1 > T3
T2 = T4
Qprimary = Qsecondary
T1 167°F (75°C)
Vsecondary=Vprimary+Vbypass
Model No.
Type 80/60
Type 120/80
Type 160/80 *1
Type 200/120 *1
*1 Floor-mounted version (typically used for
multiple-boiler installations).
Boiler supply temperature
Boiler return temperature
System supply temperature
System return temperature
Boiler circuit flow rate
Heating circuit flow rate
Bypass flow rate
Heat supplied by boiler
Heat consumed by system
Max. system flow rate
19.5 GPM / 4.5 m
35.2 GPM / 8 m
44 GPM / 10 m
80 GPM / 18 m
Accessories
3 /h
3 /h
3 /h
3 /h
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