14
Installation and maintenance instructions 0020285063_05
Size of the
cylinder
Length of the pipe
that has a diameter
of 22 mm
Pre-charge pres-
sure of the expan-
sion vessel
200
900 mm
0.3 MPa
(3.0 bar)
270
1,200 mm
0.3 MPa
(3.0 bar)
5.
Install a pipe between the safety assembly's connec-
tion and the temperature and pressure relief valve. Use
a T-piece for this. The pipe system must continuously
slope outwards, must be visible and must be protec-
ted against frost. There must be no risk of injury to per-
sons.
–
Diameter of the pipe: 15 mm
–
Length of the hose between the temperature and
pressure relief valve and the expansion relief valve:
≤
600 mm
6.
Connect the cold water inlet to the safety assembly.
–
Diameter of the cold water supply pipe:
≥
22 mm
5.2.6
Installing an expansion vessel
1.
Install the expansion vessel close to the product.
2.
Install a pipe at the expansion vessel and connect the
terminal to the safety assembly.
3.
Use a flexible hose to connect an expansion vessel to
the product's cold water inlet unit.
4.
Install the expansion vessel in accordance with the
manufacturer's specifications.
5.
Do not install a separator between the product and the
cold water inlet unit.
6.
Install the expansion vessel higher than the product in
order to not have to drain the product during mainten-
ance or when replacing the expansion vessel.
7.
Check the pre-charge pressure of the diaphragm in the
expansion vessel before you fill the product.
– ≥
0.3 MPa (
≥
3.0 bar)
5.2.7
Connecting the condensate discharge pipe
1.
Observe the locally applicable rules and regulations on
condensate discharge.
1
2
A
2.
Connect the condensate discharge pipe
(1)
to a pre-
installed drain siphon
(2)
.
Cylinder volume
Dimensions (A)
aroSTOR VWL B 200/5
UK
1047 mm
aroSTOR VWL B 270/5
UK
1367 mm
3.
Route the condensate discharge pipe with a downward
gradient and without any kinks.
4.
Fill the drain siphon with water.
5.
Leave a small clearance between the end of the con-
densate discharge pipe and the drain siphon.
6.
Ensure that the connection between the condensate
discharge pipe and the drain siphon is not air-tight.
7.
Check whether the condensate drains off without any
problems.
5.2.8
Installing a drain pipe
Drain pipe
The drain connections of the temperature and pressure re-
lief valve and the expansion relief valve must be connected
to the supplied tundish via 15-mm-thick copper pipes. The
tundish must be installed vertically, as close to the cylinder
as possible and with a maximum clearance of 600 mm from
the connection of the temperature and pressure relief valve.
It must be installed in the same room as the cylinder, but at
a sufficient distance from electrical components. The drain
pipes from the temperature and pressure relief valve and
from the expansion relief valve can be connected above the
tundish using a T-piece. The drain pipe from the 22 mm con-
nection of the tundish must consist of copper pipes with a
diameter of at least 22 mm and be connected to a safe and
visible drainage point. The vertical section of pipe beneath
the tundish must be at least 300 mm long before any bends
or diversions in the line. If the total resistance of the drain
pipework exceeds the values in the following table, you must
increase the diameter of the pipework. When installing the
drain pipework, comply with the standards, directives and
laws that are applicable in your country.
