System Layout 2 - Viessmann Vitocrossal 300 CU3A 26 Installation Instructions Manual

Vitocrossal 300 CU3A 26 to 199 Installation

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 Vitotronic 200,
A
KW6B outdoor reset control
Outdoor temperature !
B
C Vitotrol remote (optional)
D Underfloor heating circuit
Mixing valve temperature sensor ?
E
F Pressure relief valve
Plate heat exchanger for system separation
G
Accessory kit for heating circuit with mixing valve
H
I DHW circulating pump sA
DHW storage tank
J
DHW tank temperature sensor %
K
L Expansion tank
DHW recirculation pump
M
N Temperature and pressure relief valve
O Heating circuit pump
Heating circuit pump
P
* Function based on coding of address 53
*
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 18 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
45