ECONCEPT SOLAR ST
24
EN
cod. -- - 11/2010 (Rev. 00)
1. Solar circuit tightness test
Open the venting device in the solar collector circuit (ref. 17 - fig. 28).
Remove the boiler casing front panels. Open the solar circuit filling cock (ref. 1 - fig. 28) and drain cock (ref. 11 - fig. 28) .
Fit a hose from the cock (ref. 11) to the container (ref. 10 - fig. 28) and from the pump (ref. 16 - fig. 28) to the cock (ref. 1).
fig. 29 - Closed
fig. 30 - Open
Turn the flow limiter (ref. 12 - ) adjuster screw to the horizontal position (fig. 29), which closes itfig. 28.
Pump the heat transfer fluid into the circuit with the filling pump (ref. 16), until it comes out the drain cock (ref. 11 - fig. 28)
Maintain the circulation of the fluid, venting the system through the vent of the collectors (ref. 17 - fig. 28).
After venting, close the drain cock (11) and the venting device (ref. 17).
Bring the pressure to 4.5 bar and close the cock (ref. 1 - fig. 28).
Wait a few minutes, visually checking the unions and welds and recheck the pressure, which must remain stable on
the pressure gauge (ref. 7 - fig. 28).
Eliminate any leaks detected and, if necessary, do another tightness check with solar heat transfer fluid.
2. Flushing the solar circuit
Keeping the system filled and the flow limiter screw (12) in the horizontal position (closed), connect a filter (9) on the
drain pipe connected to the cock (11)
Open the cock (11) and cock (1), depressurising the solar circuit
Check the closing of the system venting device (17)
Using the pump (16), pump the solar heat transfer fluid from the container (10) in the solar circuit, for about 10-15 min-
utes (depending on the length of the system pipes)
Check the filter (9) and clean it if necessary.
3. Filling the solar circuit
Check the solar expansion tank prefilling pressure (ref. 308 - fig. 34), which should be approx. 0.3-0.5 bar below the
filling pressure (final) so that, even cold, the tank membrane is under some tension (recommended value: 1.5 bar).
Close the cock(11) and fill the solar circuit, pressurising it .
If a pressure of 2 bar (recommended value cold for systems with a height difference of up to 15 metres between the
highest point of the solar collector and the expansion tank) is reached, also close the cock (1) and turn the flow limiter
screw (12) to the upright position (open).
Disconnect the hoses and the filling pump from the cocks ref. 1 and ref. 11 of fig. 28.
4. Solar circuit venting
•
Activate mode
FH
(see specifications in cap. 4.7 "DBM29 (ECOTRONIC tech) - Solar Controller").
•
The solar pump will start operating in continuous mode.
•
Open the system vent and ensure complete venting .
•
Deactivate mode
FH
(see specifications in cap. 4.7 "DBM29 (ECOTRONIC tech) - Solar Controller").
•
The pressure gauge should indicate 1.5 - 2 bar in the circuit. If necessary, pressurise again by repeating the above steps.
L/min
12
L/min
12
