Circulation unit, direct supply
GDA300
- High efficiency circulation pump
- High class insulation shell
- Pre tested and ready to use
- Compact design
The ESBE series GDA300 is a direct supply circulation unit designed for applications, where the energy transport in the most efficient way is required. Equipped with two shut-off valves with thermometers, check valve, high class insulation shell and high efficiency circulation pump. You can be sure that ESBE delivers the best circulation unit for both your economy as well as for the environment. It is simply the most efficient direct supply unit available. When designing the circulation unit product line the focus at ESBE has been to simplify installation. This goes through the whole product from pre assembly, mounting brackets and insulation to packaging design.
Product range
GDA311
| Art.no. | Reference | DN | Pump | Connection I | Connection J | Weight [kg] | Note |
| 61003100 | GDA311 | 20 | Wilo RSTG 15/7,5 | G ¾" | G 1" | 3,7 |
Technical data
Technical data
| Pressure class: | PN 6 |
| Working pressure: | 0,6 MPa |
| Insulation: | EPP λ 0,036 W/mK |
| EEI (Energy Efficiency Index), circulation pump: | <0,21 |
| Media, Heating water: | in accordance with VDI2035 |
| Media, Water/Glycol mixtures: | max. 50 % (above 20% admixture, the pump data must be checked) |
| Media, Water/Ethanol mixtures: | max. 28 % |
| Media temperature, max.: | +110 °C |
| Media temperature, min.: | 0 °C |
| Ambient temperature, max.: | +50 °C |
| Ambient temperature, min.: | 0 °C |
| Connections, Internal thread (G): | ISO 228/1 |
| Connections, External thread (G): | ISO 228/1 |
| Material, in contact with water |
Components: Brass, Cast iron, Steel Sealing materials: PTFE, Aramid fibre, EPDM |
Integrated pump
| Wilo RSTG 15/7,5 | |
| Power supply | 230 ± 10% V AC, 50/60 Hz |
| Power consumption | 4 — 75 W |
| Enclosure rating | IP X4D |
| Insulation class | F |
| EEI (Energy Efficiency Index), circulation pump | <0,21 |
EMC 2014/30/EU
RoHS3 2015/863/EU
PED 2014/68/EU, article 4.3
Dimensioning
Wiring
Accessories and Spare Parts
Spare parts
| Art No. | Reference | Designation | Note | Data sheet | Instruction manual | |
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67003500 | GSP933 | ESBE GSP933 Ball valve DN 20 | DN20 |  |
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67000600 | GSP903 | ESBE GSP903 Thermometer upgrade set, 2 pcs/package | |
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67003300 | GSP933 | ESBE GSP933 Ball valves incl thermometer DN20 G¾", 2 pcs/package | DN20, G¾" | |
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67003800 | GSP933 | ESBE GSP933 Ball valves incl thermometer DN20 G1", 2 pcs/package | DN20, G1" | |
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67003000 | GSP930 | ESBE GSP930 Insulation circulation unit DN 20 | |
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67003100 | GSP931 | ESBE GSP931 Pump RSTG 15/7,5 Wilo | |
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67003900 | GSP932 | ESBE GSP932 PWM cable Wilo RSTG, 3m | |
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Options
| Art No. | Reference | Designation | Note | Data sheet | Instruction manual | |
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66000600 | GMA331 | ESBE GMA331 Manifold for 3 circulation units, without integrated hydraulic separator function. | DN20 | |
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66000500 | GMA321 | ESBE GMA321 Manifold for 2 circulation units, without integrated hydraulic separator function. | DN20 | |
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Download area
Download area
| Type | Preview | Download |
| Data sheet | GDA300 |
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| Installation instruction | GDA300 (en, pl, ru, sv) |
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| Installation instruction | GDA300 (de, en, es, fr, it, nl) |
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| Certificate | Declaration of Conformity, GDA300 |
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| Certificate | Declaration of Conformity UK CA, GDA300 |
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| Certificate | Building Product Declaration BPD3, GDA300 |
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| Certificate | EAC certificate (RU) |
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| Certificate | UKRSEPRO certificate (UA) |
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| Image | GDA311, high res |
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| 2D Image | GDA311 |
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| 3D drawing (stp file) | GDA311, DN20 |
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Related materials
Related products
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GMA300 | Series GMA300 is manifolds for 2 or 3 circulation units including insulation according to EnEV2014 and wall brackets. | Data sheet | Installation instruction |
Quick links
Quick links
| Movie: Circulation Units - Installation intro |