Installation 5
0020221298_02 auroSTOR Installation and maintenance instructions
9
2
3
4
5
6
7
1
1
Connection for the
expansion vessel (22
mm)
2
Cold water inlet (22
mm)
3
Pressure reducer
4
Expansion relief valve
5
Outlet for the expansion
relief valve (15 mm)
6
Connecting a pressure
gauge (optional, not
included in the scope of
delivery)
7
Flow of the cold water
supply to the cylinder
1.
Before installation, rinse the pipes in order to clear any
contamination and prevent the build up of dirt.
2.
Install the safety group horizontally and install the ex-
pansion relief valve so that it is facing upwards.
3.
Note the flow direction, which is specified by an arrow.
4.
Connect the safety group
(2)
to the drain valve. Consult
the table below to find out the length to which the pipe
should be cut.
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
0.4 MPa
(4.0 bar)
250
1,150 mm
0.4 MPa
(4.0 bar)
300
1,350 mm
0.4 MPa
(4.0 bar)
5.
Install a pipe between the safety group's connection
(3)
and the temperature and pressure expansion relief
valve. Use a T-piece for this. The pipe system must
continuously slope outwards, must be visible and must
be protected against frost. There must be no risk of
injury to persons.
–
Diameter of the pipe: 15 mm
–
Length of the hose between the temperature and
pressure expansion relief valve and the expansion
relief valve
(4)
:
≤
600 mm
6.
Connect the cold water supply to the safety group
(6)
.
–
Diameter of the cold water supply pipe:
≥
22 mm
5.2.5
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 group
(1)
.
5.2.6
Installing a discharge pipe
≤ 600 mm
≥ 300 mm
D2
2
1
D1
1
Temperature and pres-
sure expansion relief
valve
2
Tundish
The drain connections of the temperature and pressure redu-
cing 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 reducing
valve. It must be installed in the same room as the cylinder,
but at a sufficient distance from electrical components. The
discharge pipes from the temperature and pressure reducing
valve and from the expansion relief valve can be connected
above the tundish using a T-piece. The discharge pipe from
the 22 mm connection of the tundish must consist of copper
pipes with a diameter of at least 22 mm and be connected to
a safe and visible drain point. The vertical section of pipe be-
neath the tundish must be at least 300 mm long before any
bends or diversions in the line. If the total resistance of the
drain line exceeds the values in the following table, you must
increase the diameter of the line. When installing the drain
line, comply with the standards, directives and laws that are
applicable in your country.
Size of
the outlet
valve
Minimum
diameter
of the
discharge
pipe D1
Minimum
diameter
of the dis-
charge
pipe from
the tun-
dish D2
Maximum
permiss-
ible res-
istance,
inform-
ation
on the
length of
a straight
pipe
Resist-
ance per
elbow or
bend
1/2"
15 mm
22 mm
28 mm
35 mm
9 mm
≤
18 m
≤
27 m
0.8 m
1.0 m
1.4 m
3/4"
22 mm
28 mm
35 mm
42 mm
≤
9 m
≤
18 m
≤
27 m
1.0 m
1.4 m
1.7 m
1"
28 mm
35 mm
42 mm
54 mm
≤
9 m
≤
18 m
≤
27 m
1.4 m
1.7 m
2.3 m
