Viessmann WB1A Series Installation And Service Instructions Manual page 32

Boiler Connections
Installation Examples
System Layout 4
Vitodens 100-W, WB1A 8-24, 8-30 with...
– DHW storage tank
– Low-loss header
– one high-temperature heating circuit
– one low-temperature heating circuit
–
Viessmann Vitotronic 050, HK1M controller
Q
R
Legend
Legend
A Boiler power pump module
Primary pump (boiler PPM control)
A1
(field supplied)
B Honeywell switching relay for
heating circuit E
Heating circuit pump
B1
(field supplied)
C Honeywell switching relay for
DHW H control
DHW circulating pump (field
C1
supplied)
D Vitotronic 050, Model HK1M
Digital indoor / outdoor heating
circuit control unit & pump control
Vi. Part No. 7134 627
32
All manuals and user guides at all-guides.com
(continued)
A
A1
G
Heating circuit pump (field
D1
supplied)
E Radiator heating circuit
F Underfloor heating circuit
G Low loss header
-Max. flow 17.5 USGPM
Vi. Part No. 7134 791
-Max. flow 35 USGPM
Vi. Part No. 7134 792
H DHW indirect storage tank
I Outdoor temperature sensor
J Limit thermostat (optional)
See note 1
E
B
B1
J
C
H
K
C1
F
I
N
O
D1
M
See next page for notes and
explanation of this drawing.
K DHW tank aquastat, Honeywell
Part No. L4008A1031,
Vi. Part No. 9560 985
M Mixing valve motor / control
N Mixing valve supply temperature
sensor
O Viessmann mixing valve
P Room thermostat (optional)
See note 2.
Q Vitodens 100 boiler
R Expansion tank
P
D