Viessmann Vitovalor PT2 Installation And Service Instructions For Contractors page 16

Preparing for installation
Preparing for installation
Connections on the water side with connection set (standard delivery)
110
62
F
E
D
C
B
A
Fig. 6
A Heating return R
¾
Cold water R
B ½
DHW circulation R
C ½
DHW R
D ½
Depending on the layout of the modules: Connections
towards the free side on the cylinder module to the
right or left.
Note
All height dimensions have a tolerance of +15 mm on
account of the adjustable feet.
1. Prepare the connections on the heating water side.
Thoroughly flush the heating system.
Note
Fit the on-site expansion vessel (if required) to the
heating return.
16
(cont.)
(accessory)
G
A
B
C
D
E
F
E Heating flow R
¾
Manometer and drain valve
F
Gas shut-off valve
G
2. Prepare the connections on the DHW side. Install
the safety assembly (accessories or on-site provi-
sion) in the cold water line to DIN 1988 and
EN 806 (see page 40).
Recommendation:
Install the safety valve above the DHW cylinder.
This protects the valve against contamination, scal-
ing and high temperatures.
3. Prepare gas connection to TRGI [or local regula-
tions].