System Layout 3 - Viessmann VITODENS 222-F Installation Instructions Manual

Installation Examples

System Layout 3

Vitodens 222-F, B2TA with...
- Integrated DHW production
- one heating circuit with mixing valve and system separation
Legend
A Vitodens 222-F B2TA 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 outlet
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
Integral expansion tank
K
L Boiler pump
20
M Temperature and pressure relief valve outlet
DCW inlet
N
O DHW outlet
Expansion tank
P
34
Vitodens 222-F, B2TA 19 and 35 Installation
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
222-F B2TA boiler.
See page 27 for maximum water flow rate of the Vitodens
222-F B2TA 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.