System Layout 2 - Viessmann VITOCROSSAL 300 Technical Data Manual

Vitocrossal 300 CU3A 26 to 57 Technical Data

System Layout 2

Vitocrossal 300 CU3A with...
- DHW storage tank
- one heating circuit with mixing valve and system separation
Legend
Vitocrossal 300 CU3A boiler with
A
Vitotronic 200, KW6B outdoor reset
control
B Outdoor temperature !
C Vitotrol remote (optional)
Underfloor heating circuit
D
E Mixing valve temperature sensor ?
Pressure relief valve
F
Plate heat exchanger for system
G
separation
Accessory kit for heating circuit with
H
mixing valve
I DHW circulating pump sA
DHW storage tank
J
K DHW tank temperature sensor %
L Expansion tank
DHW recirculation pump
M
N Temperature and pressure relief valve
Heating circuit pump
O
Heating circuit pump
P
* Function based on coding of address 33
*
28/20
20
Installation of ...
underfloor heating circuit with 3-way mixing valve
■
and system separation (low-temp. circuit)
DHW production
■
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 8 for the supply
head pressure drop of the boiler. An undersized pump
may cause short-cycling and/or improper operation of the
boiler.
Installation Examples
21