Flushing The System - Solar 20075392 Manual Del Usuario

FlusHiNg THE sYsTEM

- Turn the knob of the return valve (R) fully anti-clockwise.
- Close the flow regulator (V) (so that the screw slot is
horizontal).
- 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
regulator (V) (so that the screw slot is vertical).
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 with water/glycol mix imme-
diately after flushing it out, because flushing water
may remain trapped in the circuit (with a conse-
quent 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 formula-
ted 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
CLOSED
position
OPEN
position
anti-freeze
50%
40%
30%
b
Do not use automatic or manual filling systems.
b
If the water supply is highly chlorinated, use distil-
led water to prepare the glycol/water mix.
14
Outlet Return
group group
Flow
regulator
Temperature
-32°C
-21°C
-13°C
R
Pump
A
V
B
Graduated
scale
(5-40 l/min)
density
1,045 kg/dm
3
1,037 kg/dm
3
1,029 kg/dm
3