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Vitodens 200-W B2HB 45, 57 Installation
System Layout 3
Vitodens 200-W, B2HB with...
- DHW storage tank
- one heating circuit with mixing valve and system separation
Legend
Vitodens 200-W B2HB boiler with
A
Vitotronic 200, HO1B outdoor reset
control
B
Outdoor temperature !
C
Vitotrol remote (optional)
Underfloor heating circuit
D
E
Mixing valve temperature sensor ?
Pressure relief valve
F
Plate heat exchanger for system
G
separation
Accessory kit for heating circuit with
H
mixing valve
I
DHW circulating pump sA
DHW storage tank
J
K
DHW tank temperature sensor %
Expansion tank
L
DHW recirculation pump
M
N
Temperature and pressure relief valve
Flow check valve
O
P
Heating circuit pump
Q
Heating circuit pump
*
Function based on coding of address 33
IMPORTANT
DHW circulating pump must pump I into the Vitodens
200-W B2HB boiler (as illustrated).
*
28/20
20
Installation of ...
underfloor heating circuit with 3-way mixing valve
■
and system separation (low-temp. circuit)
DHW production
■
... with the following flow conditions:
The flow rate of the heating circuit is less than the
maximum possible water flow rate of the Vitodens
200-W B2HB boiler.
See page 31 for maximum water flow rate of the Vitodens
200-W B2HB boilers. The use of a low-loss header is
recommended if the system water flow rate is unknown.
The low-loss header is available as accessory part.
See following pages for installation examples with a
low-loss header.
IMPORTANT
System separation is required of underfloor heating
systems employing non-oxygen diffusion barrier tubing.
All components on the secondary side of the heat
exchanger must be made of corrosion-resistant materials.
IMPORTANT
Sizing of field-supplied pump P is critical for proper
boiler operation in this system layout. See page 31 for the
supply head pressure drop of the boiler. An undersized
pump may cause short-cycling and/or improper operation
of the boiler. Viessmann STRONGLY recommends using a
low-loss header and a boiler pump in this system layout.
Boiler Connections
35
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