Circulation unit, Fixed temperature
GFA300
- Thermostatic constant temperature control
- Adjustable temperature setting
- High class insulation shell
- High efficiency circulation pump
- Compact design
The ESBE series GFA300 is a circulation mixing unit designed for heating circuits, where the constant temperature control is required. Equipped with two shut-off valves with thermometers, check valve, high class insulation shell and high efficiency circulation pump.
The GFA300 is delivered with the 3-way thermostatic mixing valve for constant temperature control of the heating circuit. The thermostatic mixing valve has adjustable temperature setting.
Product range
GFA311
| Art.no. | Reference | DN | Pump | Temperature range [°C] | Connection I | Connection J | Weight [kg] | Note |
| 61023100 | GFA311 | 20 | Wilo RSTG 15/7,5 | 20–55 | G ¾" | G 1" | 4,0 |
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 |
| Cable length: | 3m |
| 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 |
Integrated valve
| ESBE VTA378 | |
| max. Differential pressure drop | 100 kPa (1bar) |
| Temperature range | 20 - 55⁰C |
| Temperature stability | ±3⁰C* |
| * | * Valid at unchanged hot/return water pressure, minimum flow rate 9 l/min. Minimum temperature difference between hot water inlet and mixed water outlet 10°C and recommended maximum temperature difference between return water and mixed water outlet: 10°C |
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 | GFA300 |
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| Installation instruction | GFA300 (en, pl, ru, sv) |
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| Installation instruction | GFA300 (de, en, es, fr, it, nl) |
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| Certificate | Declaration of Conformity, GFA300 |
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| Certificate | Declaration of Conformity UK CA, GFA300 |
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| Certificate | Building Product Declaration BPD3, GFA300 |
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| Certificate | EAC certificate (RU) |
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| Certificate | UKRSEPRO certificate (UA) |
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| Image | GFA311, high res |
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| 2D Image | GFA311 |
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| 3D drawing (stp file) | GFA311, 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 |