33
8.4 COMMISSIONING OF THE FORCED CIRCULATION
SYSTEM
- Place the circulation group near the solar tank e higher than
the exchanger to avoid air in the circuit.
- Connect the PUMP hand pump in point 2, for allow the air to
escape into the circuit itself.
- Connect the hot flow of the manifolds to the top of the solar coil
(located at the bottom of the boiler).
- Connect the return from the bottom of the coil to the bottom of
the solar collector. This cold return pipe passes through the
solar circulator.
- Connect the expansion vessels in the return.
- Connect the electrical circuit by placing the boiler probe on
center of the solar coil and the integration probe at the
top of the boiler.
- Adjust the flow rate of the closed circuit by acting on the
regulator flow rate (5) and / or on the speed of the solar pump,
until the value indicated in the table below is reached.
8.5 WIRING DIAGRAM FOR PRESSURE RESET
FLOW ADJUSTMENT
Panels
Flow
1
1,7
2
3,3
3
5
4
6,7
5
8,3
6
10
U.M.
N.
l/min
1
8
4
5
6
7
2
3
9
10
10
1 Manual pump
2 Gate valve
3 1/2 “pump delivery
4 Antifreeze hose inlet
5 Rubber hose
6 Antifreeze tube container
7 Circulation group
8 Expansion vessel
9 Technical storage unit
10 Solar collectors
Freezing temperatures of the water-glycol
mixture as a function of the dilution%
°C
-10,1
-14,8
-20,0
-28,1
-32,0
-44,9
-50,1
Features
% by volume of propylene glycol
25%
32%
25%
43%
47%
56%
60%
