GRA111, GRA131, Wilo Pump GRA112, GRA132, Grundfos Pump
GRA111, GRA131, Wilo Pump GRA112, GRA132, Grundfos Pump

Circulation unit

GRA100

The ESBE series GRA100 is a circulation mixing unit intended for heating circulations where an outstanding flow and temperature control are required. Equipped with two shut-off valves with thermometers, check valve, high class insulation shell and high efficiency circulation pump. The GRA100 is delivered with a 3-way rotary progressive mixing valve and actuator. The Circulation Mixing Unit ensures best regulation performances independent from flow rate and low oversizing risk thanks to progressive valve characteristic, as well as the working possibility with most controllers available on the market.
  • Outstanding flow control thanks to the progressive characteristic of the valve
  • Ready to use with most controllers available on the market
  • High class insulation shell
  • One size fits all – auto adapt + progressive characteristic

Product range

GRA111_GBA111 front_B-01
GRA111, GRA131
GRx111_GBx111 side_RGB_A-01
GRx112_GBx112 front_RGB_A-01
GRA112, GRA132
GRx112_GBx112 side_RGB_A-01
Series GRA111
Art.no.ReferenceDNPumpConnection IConnection JWeight kgNoteNTCNTC = National Trade Code
61040100GRA11125Wilo 25/6G 1"G 1½"5.7230V, 3 point control signal ARA661 
61040400GRA11132Wilo 25/7.5G 1¼"G 1½"6.4230V, 3 point control signal ARA661 
Series GRA112
Art.no.ReferenceDNPumpConnection IConnection JWeight kgNoteNTCNTC = National Trade Code
61040500GRA11225Grundfos 25-50G 1"G 1½"5.8230V, 3 point control signal ARA661 
61040600GRA11232Grundfos 25-70G 1¼"G 1½"6.5230V, 3 point control signal ARA661 
Series GRA131
Art.no.ReferenceDNPumpConnection IConnection JWeight kgNoteNTCNTC = National Trade Code
61043200GRA13125Wilo 25/6G 1"G 1½"5.724V, Proportional signal ARA639 
61043300GRA13132Wilo 25/7.5G 1¼"G 1½"6.424V, Proportional signal ARA639 
Series GRA132
Art.no.ReferenceDNPumpConnection IConnection JWeight kgNoteNTCNTC = National Trade Code
61043400GRA13225Grundfos 25-50G 1"G 1½"5.824V, Proportional signal ARA639 
61043500GRA13232Grundfos 25-70G 1¼"G 1½"6.524V, Proportional signal ARA639 

Installation support

Operation
GRA100_RGB_A-01
Installation examples
Appl_Circ Unit_Mixing3-01
Appl_Circ Unit_Mixing_Multi-01
Installation instruction GRA100
Installation instruction GRA100 (EE, FI, RU, CZ)
Installation instruction GRA100, Wilo Pump
Installation instruction GRA100, Grundfos Pump
Instruction 2-way valve function

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 
Conformity: PED 2014/68/EU, article 4.3 
The integrated Mixing valve: Max. differential pressure drop: 100 kPa
Close off pressure: 200 kPa
Leakrate in % of flow*: <0,05 %
* Differential pressure 100kPa (1 bar) 
Characteristics: See diagram 
The integrated Actuator, GRA110: Actuator type: ARA661 
Control signal: 3-point 
Power supply: 230 ± 10% V AC, 50Hz 
Power consumption: 5 VA
Running time 90°: 120 s
Enclosure rating: IP41 
Protection class: II 
The integrated Actuator, GRA130: Actuator type: ARA639 
Control signal: proportional 
Feedback signal: 2-10 V AC
Power supply: 24 ± 10% V AC/DC, 50/60 Hz 
Power consumption - operation, AC: 5 W
Power consumption - operation, DC: 2.5 W
Power consumption - dimensioning, AC: 11 VA
Power consumption - dimensioning, DC: 6 VA
Running time 90°: 15/30/60/120 s
Enclosure rating: IP41 
Protection class: II 
The integrated Circulation pump: Power supply: 230±10% VAC, 50/60Hz 
Power consumption - Wilo 25/6: 3-45 W
Power consumption - Wilo 25/7.5: 3-76 W
Power consumption - Grundfos 25-50: 2-34 W
Power consumption - Grundfos 25-70: 2-53 W
Enclosure rating: IP X4D 
Insulation class: F 
Characteristics: See diagram 
Conformity CE_A-01
LVD 2014/35/EU
EMC 2014/30/EU
RoHS 2011/65/EU
ErP2015_A-01
ErP 2009/125/EC
ErP 2015
$name
EnEV 2014
Circulation pump Wiring LTC100_A-01
The circulation pump should be preceded by a multi-pole contact breaker in the fixed installation.
Wiring, Actuator ARA661 ARA600 3point_A-01
The actuator should be preceded by a multi-pole contact breaker in the fixed installation.
Wiring, Actuator ARA639 ARA600 Prop Advanced_GB_A
Valve characteristics VRG430_RGB_GB_C-01
Available pressure, Wilo pump GRx Wilo_dimensioning_verA_GB-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 = 45 kPa.
Available pressure, Grundfos pump GRx Grundfos_dimensioning_verA_GB-01

Accessories and spare parts

Options
ImageArt.no.ReferenceDesignationNational trade codeNoteData sheetInstructions manual

GMA121

Manifold for 2 circulation units, without integrated hydraulic separator function.
66000100GMA121Manifold GMA121 Manifold for 2 units. 

GMA131

Manifold for 3 circulation units, without integrated hydraulic separator function.
66000200GMA131Manifold GMA131 Manifold for 3 units. 

GMA221

Manifold for 2 circulation units, with integrated hydraulic separator function.
66000300GMA221Manifold GMA221 Manifold for 2 units, with integrated hydraulic separator function. 

GMA231

Manifold for 3 circulation units, with integrated hydraulic separator function.
66000400GMA231Manifold GMA231 Manifold for 3 units, with integrated hydraulic separator function. 
Spare parts
ImageArt.no.ReferenceDesignationNational trade codeNoteData sheetInstructions manual

GSP901

ESBE GSP901 Pump RKA 25/6 Wilo
67000100GSP901Pump RKA 25/6 Wilo DN25 

GSP901

ESBE GSP901 Pump RKA 25/7.5 Wilo
67000300GSP901Pump RKA 25/7.5 Wilo DN32 

GSP901

ESBE GSP901 Pump UPM3 25-50 Grundfos
67000400GSP901Pump UPM3 25-50 Grundfos DN25 

GSP901

ESBE GSP901 Pump UPM3 25-70 Grundfos
67000500GSP901Pump UPM3 25-70 Grundfos DN32 

GSP903

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

GSP911

ESBE GSP911 Ball valves incl thermometer DN 25, 2 pcs/package
67003400GSP911Ball valves incl thermometer DN 25, 2 pcs/package DN25  

GSP911

ESBE GSP911 Ball valves incl thermometer DN 32, 2 pcs/package
67003500GSP911Ball valves incl thermometer DN 32, 2 pcs/package DN32  

GSP910

ESBE GSP910 Insulation circulation unit DN 25/32
67004400GSP910Insulation circulation unit DN 25/32    

Download area

Find here direct related product information for download. If you don’t find your specific need here please look further into below mentioned "Quick links" or this website's “Search” and “Support” area.
Data sheet GRA100
Installation instruction GRA100
Installation instruction GRA100 (ee, fi, ru, cz)
Instruction 2-way valve function
Installation instruction GRA100, Wilo Pump
Installation instruction GRA100, Grundfos Pump
Installation instruction ARA661, 3-point
Installation instruction ARA639, Proportional
2D Image GRA111
2D Image GRA112
3D drawing (stp file) GRA111, DN25
3D drawing (stp file) GRA111, DN32
3D drawing (stp file) GRA112, DN25
3D drawing (stp file) GRA112, DN32
3D drawing (stp file) GRA131, DN25
3D drawing (stp file) GRA131, DN32
3D drawing (stp file) GRA132, DN25
3D drawing (stp file) GRA132, DN32

Related products

GMA411

GMA400, GMA500

Series GMA400 and GMA500 are manifolds for circulation units including insulation shell according to EnEV2014 and wall brackets
GMA411

Related applications

Quick Links