Download Viessmann VITODENS 222-W Technical data

Installation Examples
Vitodens 222-F, B2TA 19 and 35 Technical Data
System Layout 4
Vitodens 222-F, B2TA with...
- Integrated DHW production
- one direct-connected heating circuit
- one heating circuit with a mixing valve
5683 719 - 05
Legend
A Vitodens 222-F B2TA boiler with
Vitotronic 200, HO1B outdoor reset control
B Outdoor temperature sensor !
C Vitotrol remote (optional)
D Under floor heating circuit
E Radiator heating circuit
F Heating circuit pump 28/20
G Mixing valve temperature sensor ?
H Accessory kit for heating circuit with mixing valve
I Domestic hot water storage tank
J Integral expansion tank
K Temperature and pressure relief valve outlet
L Pressure relief valve outlet
M DHW circulating pump sA
N Boiler pump 20
O Low-loss header
P Low-loss header sensor ?
Q DCW inlet
R DHW outlet
Installation of different heating circuits...
■
radiator heating circuit (high-temp. circuit)
■
under floor heating circuit with 3-way mixing valve
(low-temp. circuit)
■
DHW production
... with the following flow conditions:
1. The water flow rate (output) of the radiator heating
circuit is at least 30% greater than that of the under
floor heating circuit.
2.
The total flow rate of the two heating circuits is
less than the maximum possible water flow rate of
the Vitodens 222-F B2TA boiler (see page 27 for
max. water flow rate).
The use of a low-loss header is strongly
recommended if the maximum water flow rate in the
application concerned exceeds the values shown on
page 27, or if the system flow rates are unknown.
The low-loss header is available as accessory part.
The 3-way mixing valve, built-in to achieve the lowtemperature level of the under floor heating circuit, is
controlled by an accessory kit for a heating circuit with
mixing valve.
27