20
4.1.4 Flush system
Having calculated the total system volume, fill the header tank of the filling station with a
proprietary solar system flushing fluid (such as Sentinel R200).
Manually open any motorised valve on the solar circuit then open the ball valve at filling point
A
. Open the valve at bleed point
B
using a radiator key or flat head screwdriver.
Set the multifunction ball valves to
Filling Position 1
as shown. Start the filling station
pump. The fluid will flow in at the filling point, down through the coil of the cylinder and out at
the bleed point, thus filling the lower section of the system. Run the filling station with the
valves in
Filling Position 1
until no further air flows from the bleed point.
Adjust the multifunction ball valves to
Filling Position 2
as shown, adjusting the left hand
valve first. The fluid will now flow in at the filling point, up through the collectors and out at
the bleed point, thus filling the upper section of the system. Continue to run the filling station
with the valves in
Filling Position 2
until no further air flows from the bleed point.
The system is now filled with flushing fluid and ready to be flushed.
Set the multifunction ball valves to
Normal Operating Position
as shown. Following the
instructions supplied with the system controller, manually activate the circulating pump by
accessing the HND Menu and setting HND1 to
On
. Ensure that any motorised valve is
activated and that the pump on the pump station is turning. Bleed any air from the pump
using the centre bleed screw.
Run the filling station for the period recommended by the flushing fluid manufacturer (20
minutes in the case of Sentinel R200). Once complete, set HND1 to
Off
, stop the filling
station pump then drain all flushing fluid from the filling station and from the system. Dispose
of the flushing fluid as instructed by the fluid manufacturer.
Figure 20: Multifunction ball valve filling positions
4.1.5 Fill system
The system may ONLY be filled with Warmflow Solar Fluid, which is a specially blended
solution of propylene glycol with corrosion inhibitors designed specifically for use with solar
collectors to provide effective heat transfer, anti-freeze and corrosion protection.
Repeat the process used for flushing but this time using Warmflow Solar Fluid (SF~).
Run the filling station for
at least 45 minutes
(15 minutes with the valves in
each
filling
position) and as long as is required to eliminate all air from the system (when no more
bubbles are present in the fluid issuing from the bleed point). If there is any air noise from
the circulating pump, bleed it using the centre bleed screw – this may need to be done
several time during filling.
Once fully bled, proceed with pressure testing.
Pressure
Relief
Filling Position 1
Filling Position 2
Normal Operating Position
Pressure
Relief
Pressure
Relief
Summary of Contents for Solar SHP20
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