System Layout 5 - Viessmann VITODENS 222-F Installation Instructions Manual

Installation Examples

System Layout 5

Vitodens 222-F, B2TA with...
- Integrated DHW production
- one heating circuit with mixing valve
- one heating circuit without mixing valve and low-loss header
Legend
A Vitodens 222-F B2TA boiler with
Vitotronic 200, HO1B outdoor reset control
Outdoor temperature sensor !
B
C Vitotrol remote (optional)
Under floor heating circuit
D
E Radiator heating circuit
F Boiler pump
20
Mixing valve temperature sensor ?
G
H Kit for heating circuit with mixing valve
Domestic hot water storage tank
I
Integral expansion tank
J
K Temperature and pressure relief valve outlet
Pressure relief valve outlet
L
M Heating pump
28/20
N Low-loss header
Viessmann temperature sensor for low-loss header
O
P DCW inlet
DHW outlet
Q
DHW circulating pump sA
R
36
Vitodens 222-F, B2TA 19 and 35 Installation
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:
The total flow rate of the two heating circuits is greater
than the maximum possible water flow rate of the
Vitodens 222-F B2TA boiler (see page 27 for maximum
water flow rate of boiler).
The use of a low-loss header is strongly recommended.
The low-loss header is available as accessory part.
The 3-way mixing valve, built-in to achieve the low-
temperature level of the under floor heating circuit, is
controlled by an accessory kit for a heating circuit with
mixing valve.