PROC 10 REC 004
Revision 4
24 06 15
Congratulations with your purchase of our high quality, corrosion free
hot water cylinder. (HWC).
If you are the installer, please follow the installation instructions carefully, AND check the final
installation according to the instructions. The Xstr
eam SOLARSTREAM™ range can only be installed in
a HORIZONTAL position.
Our Solarstream range is fitted with a Heat Exchanger (HE), the so-
called “Indirect Solar System” or
“Closed System”. The water inside the HWC is heated via the HE that in turn forms
a closed circuit with
the Solar Panel (SP). This closed circuit is filled with a suitable anti-freeze fluid. This anti-freeze fluid
then circulates through the HE and back to the SP and in the process the water inside the cylinder
absorbs the heat indirectly from the HE, thereby protecting the SP (flat panel) from bursting in freezing
conditions.
When connecting solar absorption panels of any kind to the SOLARSTREAM™ range, the element
should be placed in the upper element position at the rear end of the tank. This will ensure maximum
use is made for the solar energy, setting the thermostat at 60°C.
Remember that the HWC must be installed at a higher point than the highest point of the SP, so that
the heated antifreeze from the SP can siphon through the HE inside the HWC. We supply our tanks
with copper-to-copper conex fittings for ease of installation. Please hold the rear nut with a spanner
when the connections are done to the fittings provided. No soldering is allowed. The supplied fittings
must not be removed.
Proceed as follows:
• Position the
SP onto the roof, facing north. Follow the instructions from
the SP manufacturer to ensure a secured installation. Ensure that the SP is
level by using a spirit level. Allow 800mm free space for the element to be
replaced if needed in future.
• Position the Solarstream HWC above the SP with the cold inlet/ main supply on the HWC, when the
SP is faced from the front, to the left of the SP. Ensure that the HWC is level.
• Connect the SP to the HE on the HWC as follows:
• From the top of the SP to the top of the HE on the HWC, marked “From top of panel”
• Install a conex
-type T-piece to the HE and a 300mm length 22mm copper tube
connect positioned vertically using a conex-type stopper
• Make sure there are no negative (downward) bends.
• From the bottom of the HE on the HWC (marked “to the bottom of panel”) to the
\
bottom of panel.
• It is advisable to connect it th
e opposite bottom position on the SP, or if vacuum tubes with a
manifold is used to the opposite end. Ensure that a negative flow is created by forming a
“gooseneck” taking the solar return to a point below the manifold and then up again.
• Fill the SP an
d HE with suitable anti-freeze (non-toxic type). Fill it either from the
bottom of the SP (with flexible hose and feeder, higher than HWC
–
keep the conex
stopper off till it overflows) or fill from the top. Ensure no air is trapped inside the
system. Ensure no leaks on the connections: Fill the system to its brim and connect
the conex stopper.
• Connect the incoming cold line to the inlet (at bottom of HWC). Use a male inlet coupler (MIC).
• Ensure a suitable (up to 400kPa) pressure reducing valve (PRV) i
s connected to the incoming line
AND that the cold supply is taken from a point AFTER the PRV. This will ensure balanced pressure
(Hot and cold water supply at a mixing tap having the same pressure).
• Install a vacuum breaker at least 300mm above the HWC.
• Connect the hot water supply line from the outlet (on top of the
HWC), also installing a vacuum
breaker as per cold inlet.
• Connect copper tube to the temperature and pressure safety valve (T&P) and take it at a slope to a
safe position. Try to minimize sharp bends.
