System Layout 3 - Viessmann VITODENS 200-W Technical Data Manual

Installation Examples

System Layout 3

Vitodens 200-W, B2HA with...
- DHW storage tank
- one heating circuit with mixing valve and system separation
Legend
A Vitodens 200-W B2HA boiler with
Vitotronic 200, HO1B outdoor reset
control
Outdoor temperature !
B
Vitotrol remote (optional)
C
D Underfloor heating circuit
Mixing valve temperature sensor ?
E
F Pressure relief valve
G Plate heat exchanger for system
separation
H Accessory kit for heating circuit with
mixing valve
DHW circulating pump sA
I
J DHW storage tank
DHW tank temperature sensor %
K
Expansion tank
L
M DHW recirculation pump
Temperature and pressure relief valve
N
O Flow check valve
P Heating circuit pump
Heating circuit pump
Q
* Function based on coding of address 33
IMPORTANT
DHW circulating pump must pump I into the Vitodens
200-W B2HA boiler (as illustrated).
42
*
28/20
20
Vitodens 200-W, B2HA 19 to 80 Technical Data
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 B2HA boiler.
See page 10 for maximum water flow rate of the Vitodens
200-W B2HA 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 10 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.