Pipework volume
Pipe
Nominal diameter
Dimension x wall thick-
ness in mm
Volume in l/m
Copper pipe
DN 25
28 x 1
0.53
DN 32
35 x 1
0.84
DN 40
42 x 1
1.23
DN 50
54 x 2
2.04
DN 60
64 x 2
2.83
Threaded pipes
1
33.7 x 3.25
0.58
1 ¼
42.4 x 3.25
1.01
1 ½
48.3 x 3.25
1.37
2
60.3 x 3.65
2.21
Composite pipes
DN 25
32 x 3
0.53
DN 32
40 x 3.5
0.86
DN 40
50 x 4.0
1.39
DN 50
63 x 6.0
2.04
Hydraulic connection lines
DN 32
40 x 3.7
0.84
DN 40
50 x 4.6
1.31
Note
If the heat pump is also used for cooling, the heating water flow and
heating water return must be thermally insulated with vapour diffu-
sion-proof material.
Further hydraulic data
Circulation pump
Factory-fitted
Residual heads with integral circulation
pump
See page 55.
7.10 Water quality
Heating water
Unsuitable fill and top-up water increases the level of deposits and
corrosion. This can lead to system damage.
Hard water can also cause damage to the instantaneous heating
water heater in particular.
Observe VDI 2035 regarding quality and amount of heating water,
including fill and top-up water.
■ Flush the heating system thoroughly before filling.
■ Only fill with water of potable quality.
■ Only fill and operate appliances that have an instantaneous heat-
ing water heater with softened water.
Design information
(cont.)
122
VIESMANN
VITOCAL
7
5831388
