Viessmann WB1A007 - Page 32

Boiler Connections
32
Installation Examples (continued)
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
Legend
Legend
5581 775 1.3
M
O
D
I
F
N
E
B
J
H
K
C
R
G
A
Q
P
A1
B1
D1
C1
See next page for notes and
explanation of this drawing.
A1
B1
D1
C1
A Boiler power pump module
Primary pump (boiler PPM control)
(field supplied)
B Honeywell switching relay for
heating circuit E
Heating circuit pump
(field supplied)
C Honeywell switching relay for
DHW H control
DHW circulating pump (field
supplied)
D Vitotronic 050, Model HK1M
Digital indoor / outdoor heating
circuit control unit & pump control
Vi. Part No. 7134 627
Heating circuit pump (field
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
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