System Examples; Connections On The Dhw Side - Viessmann Vitocell 100-U Installation Instructions For Contractors

Connecting the heating water side and solar side
Note
Vitosol collectors can be operated with up to 6 bar (0.6
MPa).
1. For heating water flow temperatures above 95
Remove the pipe collars from the pipe outlets on
the heating water side (pipe collars have l.h.
threads).
2. Install the heat supply control unit.
3. Install the flow line with a rise and fit an air vent
valve at the highest point.

System examples

Available system examples: See www.viessmann-
schemes.com

Connections on the DHW side

■ For the DHW connection, observe DIN 1988 and DIN
4753 ( : SVGW regulations)
c
■ Connect all pipework with detachable fittings.
Seal any connections that are not required with red
■
brass caps.
Equip the DHW circulation pipe with a DHW circula-
■
tion pump and a check valve.
■ Connection of the DHW circulation pump:
– Connection to the boiler control unit if it is equip-
ped with a DHW circulation pump connection.
Connection with a time switch if no DHW circula-
–
tion pump connection is available on the boiler
control unit.
– Connection via the time switch.
B
A
C
D
V
E
T
T
Fig. 17
DHW
A
DHW circulation pipe
B
DHW circulation pump
C
C:
º
G
F
H K LMNH
U
N
(cont.)
4. Only for heating water flow temperatures above
110 C:
º
Install a type-tested high limit safety cut-out, if one
has not yet been installed in the system (see
pages 17 and 19). For this, use a temperature
limiter and a high limit safety cut-out.
5. For solar thermal systems:
Irrespective of collector type, install an additional
high limit safety cut-out, if less than 40 litres DHW
volume is available per m
page 17 and 19).
Permissible temperature:
Permissible operating pressure:
Test pressure:
O
HNP R H S O
Thermostatic DHW circulation set
D
Circulation pump (transfer)
E
Visible discharge pipe outlet point (tundish)
F
2
collector area (see
95 °C
10 bar
(1 MPa)
16 bar
(1.6 MPa)
17