Viessmann Vitocal 200-G Series Installation And Service Instructions Manual page 19

Hydraulic connections
Fitting the primary/secondary circuit connection set (standard delivery)
E
D
+
1.
Fig. 11
Primary circuit flow (heat pump brine inlet), con-
A
nection Cu 28 x 1.5 mm
Primary circuit return (heat pump brine outlet),
B
connection Cu 28 x 1.5 mm
Secondary circuit flow (DHW cylinder), connection
C
Cu 28 x 1.5 mm
Connecting the primary circuit
!
Please note
The heat transfer medium can cause corrosion
damage to on-site lines and components.
The components and lines used must be resist-
ant to the heat transfer medium. Never use zinc-
plated/galvanised pipes.
(cont.)
C
B
A
2.
5x
5x
Secondary circuit flow (heating circuits), connec-
D
tion Cu 28 x 1.5 mm
Secondary circuit return (heating circuits DHW cyl-
E
inder), connection Cu 28 x 1.5 mm
1. Equip the primary circuit with an expansion vessel
and safety valve, in accordance with DIN 4757.
Note
■ The expansion vessel must be approved to
DIN 4807. The diaphragms of the expansion ves-
sel and safety valve must be suitable for the heat
transfer medium.
The blow down and drain pipes should exit into a
■
container. This container must be able to hold
the maximum possible expansion volume of the
heat transfer medium.
2. Ensure adequate thermal and anti-vibration insula-
tion where pipes penetrate walls.
Installation sequence
19