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FLUSHING THE SYSTEM
- Turn the knob of the outlet valve (M) fully anti-clock-
wise.
- Turn the knob of the return valve (R) fully anti-clock-
wise.
- Close the flow regulator (V) (by turning clockwise with
a 6 mm Allen key).
- Open the cocks (A) and (B) on the return group.
- Pump water in through the cock (A) and wait for it to
come out of the cock (B).
Leave water flow through the system until it has been
thoroughly flushed out.
- Close the cocks (A) and (B) and re-open the flow reg-
ulator (V) (by turning anticlockwise with a 6 mm Allen
key).
b
If copper piping has been used and joints have
been hot brazed, flush out the system to remove
any brazing residues. Seal test the system after you
have flushed it out.
b
Fill the solar collector circuit with water/glycol mix
immediately after flushing it out, because flushing
water may remain trapped in the circuit (with a con-
sequent risk of freezing).
PREMIXING WATER + GLYCOL
Glycol anti-freeze is supplied separately and must be
premixed with water in a suitable container before being
used to fill the system. For example, a mix of 40% glycol
and 60% water provides anti-freeze protection down to a
temperature of -21°C.
b
The propylene glycol supplied is specially formulat-
ed for solar collector applications and remains fully
efficient throughout the -32 to +180°C temperature
range. It is also non-toxic, biodegradable and bio-
compatible.
b
Do NOT part fill the circuit with pure glycol then add
water later.
FUNCTIONING
Gruppo di
mandata
M
CHIUDE
CLOSE
Rubinetti A e B
Cocks (A) and (B)
posizione
posizione
CLOSED
Anti-freeze
50%
40%
30%
b
Do not use automatic or manual filling systems.
b
If the water supply is highly chlorinated, use distilled
water to prepare the glycol/water mix.
20
Gruppo di
Outlet
Return
ritorno
group
group
Regolatore
Flow
di portata V
regulator V
ø6 mm
APRE
OPEN
OPEN
APERTO
position
CHIUSO
position
Temperature
-32°C
-21°C
-13°C
R
Circolatore
Pump
A
V
B
Graduated
Scala graduata
scale
5,0-40,0 l/min.
in l/min.
Density
1,045 kg/dm
3
3
1,037 kg/dm
3
1,029 kg/dm
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