OKSOL-150 - Orkli

en
7. PROTECTION AGAINST EXCESS TEMPERATURES. SAFETY VALVES.
OKSOL-150 integrates the safety devices required in a solar system.
. Primary or solar circuit: A 3 bar safety valve guarantees
safety and correct system operation.
. Absorber design assumes solar fluid dilation of up to
1.2 litres. As a consequence pressure fluctuation inside
the absorber is minimal.
PRIMARY DRAIN OUTLET
We recommend covering the collector during prolonged absence of DHW
consumption during low consumption periods (summer, etc.). The tank
should not be drained. Do not close the inlet valve (each time the water
reaches the maximum temp. A certain amount of water will be drained,
which will be replaced by tap water at a lower temp.).
The collector can be covered with an opaque and safe tarp, to prevent
solar radiation acting on it.
. DHW circuit: A 6 bar pressure and 95ºC safety valve
guarantees optimum service range.
SECONDARY DRAIN OUTLET
SECONDARY INLET
8.
ANTI-FREEZE PROTECTION
OKSOL-150 STRUCTURE: 30-40
Solar circuit
The solar circuit heat transfer fluid contains a percentage of glycol, which varies depending on the weather at the system location. This percentage is
established as a function of the historical minimum for the area and therefore the circuit is protected against freezing. The anti-freeze fluid sheet should
clearly reflect the glycol-water mixture minimum operating temperature.
The primary circuit is loaded ready for the customer with a concentration of 50% propylene glycol, which guarantees a freezing point below 35°C (see
item 14).
DHW circuit
For extreme climate areas Orkli has designed an anti-freeze kit. Please contact our technicians for further information about this device.
In the event of a prolonged absence, empty the solar accumulator (see chapter "Accumulator Drainage").
Freezing trials carried out with the system in CENIFER refrigerator laboratories show that at rest and at a water temp. in the initial tank of 13 º C, the
system remains above freezing point more than three consecutive days at -10 º C, without any sunlight.
Chamber Temp. [Cº] Start Temp [Cº] End Temp. [Cº] Time [hours]
-20 13 0.2
37:25
-10 13
0.2
77:00
In case of freezing, the system itself with minimum radiation, undertakes to defrost the tank water
9.
LIGHTNING PROTECTION
We recommend that a copper cable with a diameter of at least 16 mm2 should be used to connect to the lightning arrest system of the building.
User manual - 17