Installation manual

ENGLISH
Conergy AS
Owners Manual
22
6.3.4 Fill procedure for closed circuit systems:
1. The charging procedure is made in two stages.
The first to leak test the system, using potable
water. The second is to charge the system with
ST-5 Solar Transfer Fluid. It is essential that the
solar panels are not exposed to direct sunlight
during this procedure. Cover if necessary.
2. Attach a suitable tube to the barbs on the Fill &
Drain Ports, and secure in place with hose
clamps or similar.
3. Fully open both ports using the Key provided.
4. Commence water flow through the Fill Port until
water is discharged from the Drain Port. This
should happen almost immediately.
5. Close the Isolating Ball Valve by turning the slot
horizontal.
6. Fluid will now move up the system, through the collectors, and return to the HEM-25-B module.
One should hear the sound of air escaping. Wait until a clear stream of water exhausts from the
Drain Port, free of air bubbles and particulate matter. This may take a few minutes.
7. At this stage, close the Drain Port. Wait until the pressure gauge reads about 1.5 - 2 Bar, then
close the Fill Port.
8. Open the Isolating Ball Valve by turning the slot vertical.
9. Thoroughly check the circuit for leaks. Watch the pressure gauge to ensure that there is no
drop in pressure – this may indicate a leak somewhere.
10. Once confident that there are no leaks in the system, repeat steps (1) – (8) of the procedure above
using an ST-5 Solar Transfer Fluid/Potable Water solution instead of straight potable water.
Fill Port
Isolating Ball
Valve
Drain Port
Pressure Gauge
6.3.5 Approved solar transfer fluid details:
Name: ST-5 Solar Transfer Fluid
Description: Propylene Glycol
Appearance: Red Liquid
To ensure adequate frost protection, use the full 4.5 litres of ST-5 within the closed circuit. This will
maintain the proportion of glycol above 37% on all closed circuit systems.
6 Connections at the Storage Tank