Preparing For Installation; Hydraulic Connection With Hydraulic Connection Set - Viessmann NC-Box Installation And Service Instructions For Contractors

Hydraulic connection with on-site pipework
For
■ Vitocal 222-G/242-G and Vitocal 333-G/343-G
■ Vitocal 200-G, Vitocal 300-G and Vitocal 350-G with-
out sufficient installation space above the heat
pump, e.g. when retrofitting

Hydraulic connection with hydraulic connection set

Vitocal 200-G, Vitocal 300-G and Vitocal 350-G with
sufficient installation space above the heat pump: See
page 7.
Fig.1
NC-Box
A
B Return, heating/cooling circuit or separate cooling
circuit
Flow, heating/cooling circuit or separate cooling
C
circuit
Primary circuit flow (NC-Box brine entry)
D
1. Fit the NC-Box near the heat pump on a wall capa-
ble of bearing the load.
2. Connect on-site connection lines so that they are
free of load and torque stress.
3
2 2
Secondary circuit return to heat pump
E
F Secondary circuit flow to the NC-Box
Heat pump
G
Primary circuit flow (heat pump brine inlet)
H
Primary circuit BDF valve (brine)
K
Secondary circuit BDF valve (heating water)
L

Preparing for installation

5