System Layout 7 - Viessmann VITODENS 200-W B2HE 85 Installation Instructions Manual

Vitodens 200-W B2HE 85, 120, 150, 199 Installation

System Layout 7

Vitodens 200-W, B2HE with...
- direct-connected heating circuit
- one heating circuit with system separation
Legend
Vitodens 200-W B2HE boiler with integrated
A
outdoor reset control and variable speed boiler pump
Outdoor temperature sensor !
B
Vitotrol remote (optional)
C
D Under floor heating circuit
Radiator heating circuit
E
F Plate heat exchanger for system separation
G Heating circuit pump (mixing circuit)
Mixing valve temperature sensor ?
H
I Accessory kit for heating circuit with mixing valve
DHW storage tank
J
DHW tank temperature sensor %
K
L Expansion tanks
Temperature and pressure relief valve
M
Pressure relief valve
N
O DHW recirculation pump
* Based on system configuration set using the
commissioning assistant.
*
P2
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 less than
the maximum possible water flow rate of the Vitodens
200-W B2HE boiler (see pages 37 and 38 for maximum
water flow rate of boiler).
The use of a low-loss header is strongly recommended if
the maximum water flow rate in the application concerned
exceeds the max. boiler flow rate, 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 low-
temperature level of the under floor heating circuit, is
controlled by an accessory kit for a heating circuit with
mixing valve I. The boiler pump supplies the radiator
heating circuit and the plate heat exchanger for system
separation.
IMPORTANT
The pressure drop (secondary circuit) of the plate heat
exchanger F must be less/equal to the pressure drop of
the 3-way mixing valve. This must be taken into account
when sizing the plate heat exchanger.
Installation Examples
45