SolexMidi - Model HZ - DN 20 - Solar Thermal Transfer Stations for Buffer Storage Tanks
Application range: for charging of buffer storage tanks. Range of application: up to 60 m² of collector surface with heat quantity measurement according to the BAFA promotion directive for solar thermal systems.The CE-conformity of the installation has been certified according to DIN EN 60335.
Technical Data
Operating data
Max. pressure: primary: 6 bars secondary: 6 bars
Max. operating temperature: primary: 120 °C secondary: 95 °C °C
Equipment
Controller: Controller SC5.14 for solar transfer stations
Sensors: 2 x Pt1000 (integrated), 3 x Pt1000 (enclosed)
Flow meter: 2 x FlowRotor, 2-50 l/min
Pressure relief valve: primary: 6 bars secondary: 6 bars
Pressure gauge: 0-6 bar, temperature-resistant
Check valves: primary: 2 x 200 mm wc secondary: 2 x 200 mm wc
Heat exchanger: 30 Plates, Type IC25
Flow meter: secondary: Flowmeter DN 20 / 3-22 l/min
Dimensions
Nominal diameter: DN 20 (¾')
Nominal diameter ('): ? '
Connections: primary: ¾' internal thread secondary: ¾' internal thread
Width: 674 mm
Height: 795 mm
Depth: 298 mm
Centre distance: 120 mm
Materials
Valves and fittings: Brass
Gaskets: Klingersil / EPDM
Insulation: EPP
Check valves: Brass
Heat exchanger: Solder: 99.99 % copper Plates + connecting pieces: 1.4401 (AISI 316)
Design data
Boundary conditions: Conditions: Irradiation = 800 W/m²; efficiency ?0.05 = 65%
Operation 1
Operating mode: 15 l/(m²xh)
Collector surface: 60 m²
Power: 31 kW
Temperature difference 1: 33 K
Operation 2
Operating mode: 40 l/(m²xh)
Collector surface: 30 m²
Power: 15 kW
Temperature difference 2: 12 K
Description
The compact and completely premounted transfer station for high-flow operation is completely insulated. The transfer station is equipped with a generously dimensioned stainless steel plate heat exchanger and with a preset and prewired controller. For a simple and quick installation as well as a safe commissioning.
All connections ¾' internal thread
Premounted on steel wall bracket
can be easily mounted to the wall with snap-in mechanism
All fluid-carrying parts made of brass or stainless steel, fully assembled - self-sealing or flat-sealing
Full port ball valves
Check valve in the solar and secondary circuit, can be opened, 200 mm wc, especially for solar systems, prevents gravity circulation
Airstop in the flow
for permanent deaeration of the heat transfer medium
With high-efficiency pumps by Grundfos - already installed and prewired; adapted to the performance of the transfer station, pumps can be isolated completely, no draining necessary during pump service
Flush and fill unit integrated
two fill and drain valves permit filling and flushing the primary circuit, secondary circuit with pressure relief valve at the highest point of the heat exchanger
FlowRotor, flow meter for speed control of the secondary pump, depending on the performance and heat quantity balancing (secondary)
Solar safety group
Solar pressure relief valve 6 bars, pressure gauge resistant to high temperatures 0-6 bars with valve, flat sealing connection for expansion tank, secondary side with 6 bars pressure relief valve
Compact design insulation with optimised function
made of durable elastic EPP, 100 % insulated valves and fittings, minimal heat losses
High-efficiency plate heat exchanger
generously dimensioned, for transmitting high performances with low temperature differences, completely integrated into the insulation
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