Riello TOP MODULANTE Bedienungsanleitung Seite 20

VM
PC Heat transfer fluid filling pump
To fill the system, proceed as follows:
− Fit the hose holder (supplied) and connect a rubber pipe
to the taps (A) and (B)
− Connect the filling pump (PC) as shown
− Turn handle on valve (VR) clockwise
Open taps (A) and (B) on the return tube
− Open manual degassing tap and any bleeder valve, lo-
cated at the highest points of the system, and keep them
open throughout the filling procedure.
− Pump the heat transfer fluid around the circuit with an
external filling pump until all air bubbles have been
eliminated. Close the manual bleed valve and any vent
valves opened previously.
− Close the cock (A)
− Temporarily raise the pressure in the system to 4 bar.
− Close the cock (B)
− Turn handle on valve (VR) counter clockwise
− Start up the system for about 20 minutes.
− Repeat air bleeding operation until system is completely
free of air bubbles.
− set the system pressure. Open the tap (A) to lower the
pressure to the desired value.
− Close the cock (A)
− Disconnect the rubber pipes and remove the hose holder
from the taps (A) and (B)
9
The set pressure must ensure that the one measured at the
solar collectors is positive with respect to the ambient one
(avoid depression in the solar field) and must be set con-
sidering both the safety valve opening pressure (10) and the
solar expansion reservoir pre-charge pressure. To set the
system pressure correctly, refer to the design manual.
0
Do not fill the system in bright, sunny conditions or if the
collectors are hot.
9
Use a manual bleed valve, which should be installed at the
highest point in the system, to ensure that all air bubbles
have been eliminated from the circuit.
VR
B
PC
A
Mixture
of glycol
and water
ADJUSTING THE FLOW
Correct flow adjustment is essential to proper functioning of the
entire system.
Set the flow adjuster (V) to the fully open position.
The pump is of the modulating type and is controlled by the
solar controller by means of a PWM signal. Refer to the manu-
al supplied with the solar controller to set the pump flow rate
range.
Make sure that the pump's rated flow rate is suitable for the
number of solar collectors connected to the solar storage cyl-
inder.
M
MB
Flow regulator V
CLOSED OPEN
ø6 mm
Graduated scale
l/min.
Proceed as follows:
− Using the manual mode of the solar regulator set the
maximum speed of the circulator (see instructions of the
solar regulator)
− Check the value on the measuring device (G) and adjust
the flow rate using the flow rate adjuster (V) to obtain the
flow rate required by the system.
− Set the automatic mode of the solar regulator.
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R
G
RB
G