GFA311, Wilo Pump
GFA311, Wilo Pump

Circulation unit

GFA300

The ESBE series GFA100 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 GFA100 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.

  • Thermostatic constant temperature control
  • Adjustable temperature setting
  • High class insulation shell
  • High efficiency circulation pump
  • Compact design

Product range

GFA300 front_A-01
GFA311
GFA300 side_A-01
Series GFA311
Art.no.ReferenceDNPumpTemperature range °CConnection IConnection JWeight kgNoteNTCNTC = National Trade Code
61023100GFA31120Wilo 15/7,520–55G ¾"G 1"4.0  

Installation support

Installation examples
GFA300_B-01
Installation instruction GFA300

Technical data

Technical data
Pressure class: PN 6 
Media temperature, max.: +110 °C
min.: 0 °C
Ambient temperature, max.: +50 °C
min.: 0 °C
Working pressure: 0.6 MPa
Connections, Internal thread (G): ISO 228/1 
External thread (G): ISO 228/1 
Insulation: EPP λ 0.036 W/mK 
Media, Heating water  (in accordance with VDI2035) 
Water/Glycol mixtures, max. 50 %
(above 20% admixture, the pump data must be checked)  
Water/Ethanol mixtures, max. 28 %
Material, in contact with water: Components of Brass, Cast iron, Steel 
Sealings material of: PTFE, Aramid fibre, EPDM 
EEI (Energy Efficiency Index), Wilo circulation pump: <0,21 
The integrated Thermostatic mixing valve: Max. differential pressure drop: 100 kPa
Temperature range: 20–55 °C
Temperature stability*: ± 3 °C
* Valid at unchanged hot/cold water pressure, minimum flow rate 9 l/min. Minimum temperature difference between hot water inlet and mixed water outlet 10°C. 
The integrated Circulation pump: Type: Wilo RSTG 15/7,5 
Power supply: 230±10% VAC, 50/60Hz 
Cable length: 3 m
Power consumption: 4-75 W
Enclosure rating: IP X4D 
Insulation class: F 
EEI (Energy Efficiency Index): <0,21 
Characteristics: See diagram 
Conformity CE_A-01
LVD 2014/35/EU
EMC 2014/30/EU
RoHS 2011/65/EU
ErP2015_A-01
ErP2009/125/EC
ErP2015
$name
EnEV2014
. blank-01
Circulation pump Wiring LTC100_A-01
The circulation pump should be preceded by a multi-pole contact breaker in the fixed installation.
GxA300_elkoppling PWM-01
Pumpspeed could be controlled by PWM signal
Constant speed GFA300 Constant dimensioning_A_en-01
Dimensioning, Pump Capacity diagram
Example: Start with the heating demand of heating circuit (e.g. 25 kW) and move horizontally to the right in the diagram to the Δt = 15°C (temperature difference between flow and return of the heating circuit). Next go up and find working point and read the available pressure of the pump on the left – ∆p = 47 kPa.
Variable pressure GFA300 Constant dimensioning_A_en-01

Accessories and spare parts

Options
ImageArt.no.ReferenceDesignationNational trade codeNoteData sheetInstructions manual

GMA321

Manifold for 2 circulation units, without integrated hydraulic separator function.
66000500GMA321Manifold GMA321, DN20 Manifold for 2 units.

GMA331

Manifold for 3 circulation units, without integrated hydraulic separator function.
66000600GMA331Manifold GMA331, DN20 Manifold for 3 units.
Spare parts
ImageArt.no.ReferenceDesignationNational trade codeNoteData sheetInstructions manual

GSP931

ESBE GSP931 Pump RSTG 15/7,5 Wilo
67003100GSP931Pump RSTG 15/7,5 Wilo    

GSP903

ESBE GSP903 Thermometer upgrade set, 2 pcs/package
67000600GSP903Thermometer upgrade set, 2 pcs/package    

GSP932

ESBE GSP932 PWM cable Wilo RSTG, 3m
67003900GSP932PWM cable Wilo RSTG, 3m    

GSP933

ESBE GSP933 Ball valves incl thermometer DN 20, 2 pcs/package
67003300GSP933Ball valves incl thermometer DN 20, 2 pcs/package DN20  

GSP930

ESBE GSP930 Insulation circulation unit DN 20
67003000GSP930Insulation circulation unit DN 20    

Download area

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Data sheet GFA300
Installation instruction GFA300
2D Image GFA311
3D drawing (stp file) GFA311, DN20

Related products

GMA321

GMA300

Series GMA300 is manifolds for 2 or 3 circulation units including insulation according to EnEV2014 and wall brackets.
GMA321

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