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Circulation unit, Control function
GRB300
- Variable primary flow and constant secondary flow
- High efficiency circulation pump with 21 different flow settings and feedback on power consumption
- A broad product portfolio offering multiple configuration options, including various Kvs values and different high efficiency circulation pumps. Some units are also equipped with an integrated balancing valve.
- Equipped with two extra shut-off valves
- Easy to install with adjustable wall bracket
- High class insulation shell
- Pretested and ready to install
- Compact design
The function of the GRB300 is preferable when there is a requirement to control small energy additions to the secondary circuit. The valve functions as an ‘injection valve’ with an always fully open bypass, allowing a larger working angle to be utilized. To optimize the installation, the Kvs value should be chosen based on the energy need in the secondary circuit, which also will provide increased comfort and longevity by minimizing the risk of controller hunting.
Circulation unit series GRB300 is supplied with a rotary 3-way housing with a 2-way valve function and an internal bypass that is constantly open. The valves come with a knob for manual adjustments and can be equipped with the preferred actuator or controller.
The GRB300 units are also equipped with two shut-off valves with colour coded thermometers, a pump and a high-class insulation shell. Two extra shut-off valves, with colour coded thermometers, to be mounted in a preferred location, are also included.
The units have adjustable wall bracket which simplifies mounting onto the wall.
Product range
GRB301
| Art.no. | Reference | DN | Kvs [m³/h] | Pump | Actuator type | Connection I | Connection J | Weight [kg] |
| 61045100 | GRB301 | 20 | 0,4 | Wilo Yonos PICO 15/1-6 | ─ | G 1" | G 1" | 4,7 |
| 61045200 | GRB301 | 20 | 0,63 | Wilo Yonos PICO 15/1-6 | ─ | G 1" | G 1" | 4,7 |
| 61045300 | GRB301 | 20 | 1,0 | Wilo Yonos PICO 15/1-6 | ─ | G 1" | G 1" | 4,7 |
| 61045400 | GRB301 | 20 | 1,6 | Wilo Yonos PICO 15/1-6 | ─ | G 1" | G 1" | 4,7 |
| 61045500 | GRB301 | 20 | 2,5 | Wilo Yonos PICO 15/1-6 | ─ | G 1" | G 1" | 4,7 |
| 61045600 | GRB301 | 20 | 4,0 | Wilo Yonos PICO 15/1-6 | ─ | G 1" | G 1" | 4,7 |
GRB361
| Art.no. | Reference | DN | Kvs [m³/h] | Pump | Actuator type | Connection I | Connection J | Weight [kg] | Note |
| 61046100 | GRB361 | 20 | 0,4 | Wilo Stratos PICO 15/0,5-6 | ─ | G 1" | G 1" | 5,6 | with 1 balancing valve |
| 61046200 | GRB361 | 20 | 0,63 | Wilo Stratos PICO 15/0,5-6 | ─ | G 1" | G 1" | 5,6 | with 1 balancing valve |
| 61046300 | GRB361 | 20 | 1,0 | Wilo Stratos PICO 15/0,5-6 | ─ | G 1" | G 1" | 5,6 | with 1 balancing valve |
| 61046400 | GRB361 | 20 | 1,6 | Wilo Stratos PICO 15/0,5-6 | ─ | G 1" | G 1" | 5,6 | with 1 balancing valve |
| 61046500 | GRB361 | DN20 | 2,5 | Wilo Stratos PICO 15/0,5-6 | ─ | G 1" | G 1" | 5,6 | with 1 balancing valve |
| 61046600 | GRB361 | 20 | 4,0 | Wilo Stratos PICO 15/0,5-6 | ─ | G 1" | G 1" | 5,6 | with 1 balancing valve |
Installation support
Install ESBE Circulation unit GRB300 (sv)
Operation
Installation example
Documents
| Name | Download |
| Installation instruction GRB300 |
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Technical data
Technical data
| Pressure class: | PN 10 |
| Working pressure: | 1,0 MPa |
| Insulation: | EPP λ 0,036 W/mK |
| EEI (Energy Efficiency Index), circulation pump: | <0,20 |
| Media, Heating water: | in accordance with VDI 2035 |
| Media, Water/Glycol mixtures: | max. 50 % ; water / glycol mixtures are affecting the pump performance. In case of Applications where water / glycol mixtures are used, pump performance should be considered. |
| Media temperature: | min. +5°C, max. +95°C |
| Ambient temperature: | min. 0°C, max. +40°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 Yonos PICO 15/1-6 130 | |
| Power supply: | 230 ± 10% V AC, 50/60 Hz |
| Power consumption: | 4 — 40 W |
| Enclosure rating: | IP X4D |
| Insulation class: | F |
| EEI (Energy Efficiency Index), circulation pump: | <0,20 |
| Wilo Stratos PICO 15/0,5-6 130 | |
| Power supply: | 230 ± 10% V AC, 50/60 Hz |
| Power consumption: | 3 — 40 W |
| Enclosure rating: | IP X4D |
| Insulation class: | F |
| EEI (Energy Efficiency Index), circulation pump: | ≤0,18 |
Conformity
EMC 2014/30/EU
RoHS3 2015/863/EU
ErP 2009/125/EU
Dimensioning
Wiring
Accessories and spare parts
Options
| Art No. | Reference | Designation | Note | Data sheet | Instruction manual | |
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12520100 | ARA639 | ESBE ARA639, Actuator Proportional 24V 15/30/60/120s | |
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12101300 | ARA661 | ESBE ARA661, Actuator 3-point 230V 120s | |
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12721100 | CRA211 | ESBE CRA211 Constant temperature Controller | |
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12721700 | CRA217 | ESBE CRA217 Constant temperature Controller | with PWM pump control | |
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12663100 | CRB211 | ESBE CRB211 Room temperature Controller, Cable | |
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12663700 | CRB217 | ESBE CRB217 Room temperature Controller, Cable | with PWM pump control | |
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12665700 | CRB227 | ESBE CRB227 Room temperature Controller, Wireless | with PWM pump control | |
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12821100 | CRC211 | ESBE CRC211 Outdoor temperature compensated Controller | |
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12821700 | CRC217 | ESBE CRC217 Outdoor temperature compensated Controller | with PWM pump control | |
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12684200 | CRD221 | ESBE CRD221 Combined outdoor and room temperature Controller | |
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12684700 | CRD227 | ESBE CRD227 Combined outdoor and room temperature Controller | with PWM pump control | |
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66000500 | GMA321 | ESBE GMA321 Manifold for 2 circulation units, without integrated hydraulic separator function. | DN20 | |
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66000600 | GMA331 | ESBE GMA331 Manifold for 3 circulation units, without integrated hydraulic separator function. | DN20 | |
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66000700 | GMB631 | ESBE GMB631 Manifold Box | DN20, for 2-3 units | |
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66100800 | GOP853 | ESBE GOP853 Wilo-Connect module BMS | |
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66101000 | GOP831 | ESBE GOP831 Balancing valve STV20 | DN20 | |
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Spare parts
| Art No. | Reference | Designation | Note | Data sheet | Instruction manual | |
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67004100 | GSP941 | ESBE GSP907 Pump Wilo Yonos PICO 15/1-6 130 | DN20 | |
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67006300 | GSP953 | ESBE GSP953 Pump Wilo Stratos PICO 15/0,5-6 | DN20 | |
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Download area
Download area
| Type | Preview | Download |
Related materials
Applications
Applications
Circulation unit equipped with rotary mixing valve with 2-way function. The circulation unit is intended for heating circuits where a constant secondary flow and temperature control are required.