Solahart 151J, Руководство пользователя

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INSTALLATION INSTRUCTIONS – CLOSED CIRCUIT SERIES
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FILLING AND COMMISSIONING THE CLOSED CIRCUIT
The solar collectors and tank heat exchanger jacket are connected together to create a sealed, closed circuit that is entirely
separate from the potable water in the storage cylinder. The circuit is filled with ‘Hartgard’ fluid. Under no circumstances
can any fluids other than ‘Hartgard’ be used as the heat transfer fluid. Only potable water can be used in conjunction with
‘Hartgard’. If potable water cannot be sourced, then distilled or deionised water should be used.
Only Solahart trained and authorised installers are permitted to fill the closed fluid circuit. Refer to your Solahart dealer for
more information. For authorised installers, a special set of instructions and installation tools are provided.
Warning: The storage tank must be filled with water and pressurised before filling the closed circuit. Filling the
storage tank provides water pressure inside of the cylinder, protecting it from the pressure within the closed circuit during
the commissioning process. Not filling the storage tank with water may result in damage to the cylinder lining.
The solar collectors must be covered with an opaque material. Covering the collectors prevents solar gain and heating from
occurring, keeping the collectors and closed circuit fluid cooler during the commissioning procedure. This will reduce the
risk of scalding and burn injury by preventing the collector surface and closed circuit fluid from becoming very hot.
Systems Installed with an Over Temperature Protection (OTP) System
An Over Temperature Protection system incorporates a HartStat valve. The HartStat valve is a temperature actuated valve
that is designed to close when exposed to high temperatures.
Warning: Apart from being an occupational health and safety concern to the installer, if the solar collectors and
HartStat valve are not covered during the commissioning procedure of the closed circuit of a thermosiphon unit, it is
possible for the solar collectors to generate enough heat to close the valve. This will create a vapour lock that prevents
complete filling of the closed circuit.
If the HartStat valve was to close and the closed circuit is only partially filled the solar performance can be severely
reduced resulting in a no hot water complaint. In addition, excessive noise can be generated from the system leading to
possible disturbance and irritation to the householders.
To avoid premature closure of the HartStat valve, the following instructions MUST BE followed during the commissioning
procedure and charging of the closed circuit.
Ensure the collectors are covered with the carton material. If not, securely cover the collectors with an opaque material.
This is to prevent solar gain and heating of the closed circuit fluid during the commissioning procedure.
Cover the HartStat valve with a cloth soaked in cold water. This is to keep the valve as cool as possible and ensure it
remains in the open position during the commissioning procedure.
Closed Circuit Fluid and Concentration
The Hartgard heat transfer fluid concentrate is supplied a 4.5 litre bottle. A minimum of one (1) complete 4.5 litre bottle of
concentrate is recommended and should be used in each system as standard where the ambient temperature does not fall
below -7°C. A Hartgard concentration greater than 20% is required to suit ambient temperatures below -7°C and the
volume used may need to be increased in the closed circuit.
The volume of Hartgard heat transfer fluid concentrate to be used in the closed circuit of each system is given in the table
below. Check this volume against the closed circuit volume required for the system to ensure the correct amount of fluid
has been added. Failure to mix the correct volume of Hartgard concentrate may void the Solahart warranty. Solution
concentrations over 50% become proportionally less thermally efficient. The Hartgard can be siphoned into the closed
circuit system using a known quantity of fluid. Fill the system by the siphon method using a known quantity of fluid.
Heat transfer fluid concentrate volume (litres)
for minimum ambient operating temperature
System
Size
Number of
SPA2000 or
J Collectors
Closed
Circuit
Volume
4.5 litre*
heat transfer
fluid
concentrate
-7°C (18°F)
20% fluid
concentrate
-13°C (7°F)
30% fluid
concentrate
-22°C (-8°F)
40% fluid
concentrate
-34°C (-29°F)
50% fluid
concentrate
151 1 11.9 33.6% 2.4 3.6 4.8 6.0
181 1 13.4 29.9% 2.7 4.0 5.4 6.7
302 2 19.2 20.8% 3.8 5.8 7.7 9.6
303 3 23 17.4% 4.6 6.9 9.2 11.5