STIEBEL ELTRON SOL 27 PREMIUM W - Manual (Page 5)

17 West St., W. Hatfi eld, MA 01088
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INSTALLATION INSTRUCTIONS
SOL 27 PREMIUM S & W COLLECTORS - 230016 & 230017
3 Assembly instructions
3.1 Important Information
!
WARNING: RISK OF SCALDING. TO PREVENT THE
SOLAR FLUID FROM BOILING IN THE COLLECTORS,
THE SYSTEM SHOULD NOT BE FLUSHED OR FILLED DURING
PERIODS OF STRONG SUNSHINE.
System Pressure
Regularly check the pressure gauge of the heat transfer
circuit at the pump station. The pressure should range
between 30-70 psi during all operating times. If the system
is above or below this pressure, troubleshooting may be
required.
After-heating Backup
The backup heater should be of adequate capacity to
provide suffi cient hot water. The backup water heater must
be certifi ed, listed, and labeled by an accredited safety
certifi cation organization.
Expansion Tank
An expansion tank must be included in the solar loop, and
is typically connected via the dedicated expansion tank
connection on the pump station. The expansion tank should
be sized according to standard design practices. More
information about expansion tank sizing can be accessed via
the expansion tank users manual.
!
IMPORTANT: TO PROTECT THE SYSTEM AGAINST
FROST AND CORROSION, FILL THE SOLAR SYSTEM
EXCLUSIVELY WITH THE RECOMMENDED PROPYLENE GLYCOL
MIXTURE.
4 Installation Instructions
4.1 Planning and Installation
Pipework Installation
Use copper or stainless steel pipes or corrugated stainless
steel hoses for the supply and return lines. Pipe diameter
is depended on length of run and expected fl ow rates.
Recinnebded pipe diameter for systems of up to eight
collectors is ¾˝. If the pipe run is longer than 60 feet, a
larger pipe diameter may be needed.
Vent tiles are recommended for pipe run penetrations
into the roof. On fl at roofs and roofs with shallow pitches,
passing the pipes through an external wall is recommended
to avoid water leaks. Pipe hangers must provide correct
support and pitch and must meet building codes. Hangers
must not comporess insulation and should allow for thermal
contraction and expansion of the pipework. Installers must
comply with all Local, State and National Codes.
We recommend trimming pipes with pipe cutters to avoid
creating metal fi lings. Electrically ground the pipework in
accordance with electrical codes. Connect all pipework to
the building's ground over the shortest possible distance.
Soldered Pipe
Soldered pipe must be hard-soldered using 95/5 lead-free
solder.
Alternative Piping
Piping made with locking ring fi ttings, press fi ttings,
and corrugated hoses must be sealed using suitable
sealants. Seals must be resistant to propylene glycol and
temperatures up to 356F.
Rated Volumetric Flow Rate
The rated volumetric fl ow rate for a collector array (max. 5
collectors) is 0.25 - 1.25 gpm, but it is recommended to be
0.75 gpm. The fl ow rate for every additional collector array,
so in a system of 3 x 3 collectors, the fl ow rate would be
2.25 - 11.25 gpm, but Stiebel Eltron would recommend 6.75
gpm.