Stiebel Eltron SOL 23 PLUS Utilisation Et Installation page 28

Also protect the thermal insulation against
bird attack.
Sample installation
The system sketch shows the layout of a
A
solar heating system for DHW heating.
Air vent valve
Install a manual air vent valve
!
(lockable) at high points of the system;
alternatively route a ventilation line to a
manual air vent valve. Never use automatic
air vent valves.
Safety
There must not be any shut-off devices
!
between the collectors and the safety
valve. The safety valve responds at 6 bar.
To comply with DIN 4757 the safety valve must
discharge into a container that can hold the
entire content of the system. In case of smaller
systems, the empty heat transfer medium can is
adequate.
Non-return valve
SOKI is fitted with a resettable non-return valve
as standard to prevent stored heat from being
dissipated.
Drain facility
Install a drain valve at the lowest point of the
system.
Expansion vessel
The expansion vessel is designed for an
operating pressure of 6 bar and to be resistant
to H-30 L or H-30 LS.
The pre-charge pressure is 3 bar and must
be checked before the system is filled. This
pressure must never be reduced.
Installation information
Check to ensure that the roof
!
structure is in perfect condition (static
calculation required and possibly Building
Regulations/Planning Permission).
All roof work must be undertaken by a
qualified roofer. When working on roofs, follow
the safety regulations and, in particular, the
"Safety rules for working on roofs" and "Safety
and fall arrest harnesses".
Handling
The collector can be pulled onto the roof
C
over a ladder. For this, place a rope around the
entire collector frame.
Never connect this rope to the collector
connections.
Installed height
The SOL 23 plus is designed in accordance with
DIN 1055 for a max. installation height of 20 m
and a snow load of 1.25 kN/m² (equivalent to a
standard snow load of 1.2 kN/m²).
28
C
When working on roofs: Observe the relevant safety regulations.
Assembly
Generally, roof integration on a tiled roof with
a pitch of 30°- 90° is possible. The collectors
may be fitted either next to each other or
above each other. The SOL 23 plus flat plate
collector for roof integration is designed
for a rafter roof with a tensioned underlay
and tile cover. Roofs that vary from these
constructions may required checking.
For reasons associated with the
!
hydraulic criteria, no more than five
collectors may be connected together in
series. The individual rows of the array must
be arranged parallel to each other.
Tools required
You need the following tools for the
installation:
– Conical one-lip bit for sheet metal or a
stepped drill bit, min. Ø = 27 mm
– Bit Ø = 4.5 mm
– 2 spanners with a width across flats of 10
– Ratchet with extension, socket spanner
SW 10
– To connect the collectors:
2 spanners with width across flats of
32 and 27
– For the roof outlet/duct:
2 spanners with width across flats of
30 and 38
– For the lead flashing and clamps for the
flashing:
Hammer and rubber mallet
Ice load
The standard snow load must also never be
exceeded through the formation of snow
traps, snow drifts and ice.
Standard snow load for Germany
When installing solar collectors observe that
different minimum angles of inclination must
be applied to the collectors for snow load
zones 1 to 3. When making this calculation
it is assumed that the snow can slide off the
roof unimpeded.
Rope
Never attach the rope to the ends of the pipes.
eight in
H
m above
sea level
100
200
300
400
500
600
700
800
900
1000
1100
1200
1300
x : Any angle of inclination (see specification)
* : In accordance with the relevant Planning Office
Edge and corner regions
The collectors must be secured outside the
D
edge and corner regions in accordance with
DIN 1055 part 4.
D
a/8
a/16
Snow load zone
1 1a 2 2a 3
• • • • •
• • • • •
• • • • •
• • • • > 32°
• • • > 35° > 39°
• • >37° > 41° > 44°
• • > 41° > 45° > 48°
• > 36° > 45° > 48° > 50°
> 35° > 40° > 48° > 50° > 52°
> 39° > 43° > 49° > 52° > 53°
> 42° > 46° > 51° > 53° > 54°
> 44° > 48° > 53° > 54° > 55°
> 47° > 49° > 54° > 55° > 56°
a (roof width)
Roof area
Edge
Corner
a/2