Circulation unit, Mixing function
GRC100, GRC200
- Outstanding flow control thanks to the progressive characteristic of the valve
- Perfect heating curve characteristic
- High class insulation shell
- One size fits all – auto adapt + progressive characteristic
The ESBE series GRC is a circulation mixing unit which is intended for heating circulations where an outstanding flow and outdoor temperature control are required. Equipped with two shut-off valves with thermometers, check valve, high class insulation shell and high efficiency circulation pump. The GRC series is delivered with a 3-way rotary progressive mixing valve and actuator combined with outdoor temperature controller. The Circulation Mixing Unit ensures best regulation performances independent from flow rate and low oversizing risk thanks to the progressive valve characteristic, as well as the perfect heating curve characteristic.
GRC111



Art.no. | Reference | DN | Pump | Connection I | Connection J | Weight [kg] | Note |
61040200 | GRC111 | 25 | Wilo 25/6 | G 1" | G 1½" | 6,3 | Controller CRC111 |
61040700 | GRC111 | 32 | Wilo 25/7,5 | G 1¼" | G 1½" | 7,0 | Controller CRC111 |
GRC112



Art.no. | Reference | DN | Pump | Connection I | Connection J | Weight [kg] | Note |
61040900 | GRC112 | 25 | Grunfos 25-50 | G 1" | G 1½" | 6,4 | Controller CRC111 |
61041100 | GRC112 | 32 | Grundfos 25-70 | G 1¼" | G 1½" | 7,1 | Controller CRC111 |
GRC141



Art.no. | Reference | DN | Pump | Connection I | Connection J | Weight [kg] | Note |
61041300 | GRC141 | 25 | Wilo 25/6 | G 1" | G 1½" | 7,0 | Controller CRD122, with room display unit |
61041400 | GRC141 | 32 | Wilo 25/7,5 | G 1¼" | G 1½" | 7,8 | Controller CRD122, with room display unit |
GRC142



Art.no. | Reference | DN | Pump | Connection I | Connection J | Weight [kg] | Note |
61041500 | GRC142 | 25 | Grundfos 25-50 | G 1" | G 1½" | 7,1 | Controller CRD122, with room display unit |
61041600 | GRC142 | 32 | Grundfos 25-70 | G 1¼" | G 1½" | 7,9 | Controller CRD122, with room display unit |
GRC211



Art.no. | Reference | DN | Pump | Connection I | Connection J | Weight [kg] | Note |
61040300 | GRC211 | 25 | Wilo 25/6 | G 1" | G 1½" | 7,2 | Controller 90C-1A |
61040800 | GRC211 | 32 | Wilo 25/7,5 | G 1¼" | G 1½" | 7,9 | Controller 90C-1A |
GRC212



Art.no. | Reference | DN | Pump | Connection I | Connection J | Weight [kg] | Note |
61041000 | GRC212 | 25 | Grundfos 25-50 | G 1" | G 1½" | 7,3 | Controller 90C-1A |
61041200 | GRC212 | 32 | Grundfos 25-70 | G 1¼" | G 1½" | 8,0 | Controller 90C-1A |
Guidance for installers, Circulation Units
Operation

Installation examples

Technical data
Pressure class: | PN 6 |
Working pressure: | 0,6 MPa |
Insulation: | EPP λ 0,036 W/mK |
EEI (Energy Efficiency Index): | <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. - GRC100: | +50 °C |
Ambient temperature, max. - GRC200: | +40 °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
Grundfos UPM3 25-50 | |
Power supply | 230 ± 10% V AC, 50/60 Hz |
Power consumption | 2 — 34 W |
Enclosure rating | IP X4D |
Insulation class | F |
EEI (Energy Efficiency Index) | <0,20 |
Grundfos UPM3 25-70 | |
Power supply | 230 ± 10% V AC, 50/60 Hz |
Power consumption | 2 — 53 W |
Enclosure rating | IP X4D |
Insulation class | F |
EEI (Energy Efficiency Index) | <0,20 |
Wilo Yonos Para 25/6-130 RKA | |
Power supply | 230 ± 10% V AC, 50/60 Hz |
Power consumption | 3 — 45 W |
Enclosure rating | IP X4D |
Insulation class | F |
EEI (Energy Efficiency Index) | <0,20 |
Wilo Yonos Para 25/7,5 RKA | |
Power supply | 230 ± 10% V AC, 50/60 Hz |
Power consumption | 3 — 76 W |
Enclosure rating | IP X4D |
Insulation class | F |
EEI (Energy Efficiency Index) | <0,21 |
Integrated valve
ESBE VRG430, DN20-8 | |
max. Differential pressure drop | 100 kPa (1 bar) |
Close off pressure | 200 kPa (2 bar) |
Leakrate in % of flow | <0,05%* |
* | Differential pressure 100 kPa (1 bar) |
ESBE VRG430, DN25-12 | |
max. Differential pressure drop | 100 kPa (1 bar) |
Close off pressure | 200 kPa (2 bar) |
Leakrate in % of flow | < 0,05%* |
* | Differential pressure 100kPa (1 bar) |
Integrated controller
ESBE 90C-1A-90 | |
Power supply | 230 ± 10% V AC, 50/60 Hz |
Power consumption | 5 VA |
Running time at max. speed | 120 s |
No. of input sources | 5 |
No. of output sources | 1 |
Enclosure rating | IP54 |
Protection class | II |
ERP temperature controls class | III |
Energy efficiency contribution | 1,5% |
ESBE CRD122 | |
Power supply | Actuator unit: 230 ± 10% V AC, 50 Hz; Room display unit, wireless: 2x 1,5 V LR6/AA |
Battery endurance, wireless room display unit | 1 year |
Power consumption | 10 VA |
Running time at max. speed | 30 s |
Enclosure rating | Actuator unit: IP41; Room display unit: IP20 |
Protection class | II |
ERP temperature controls class | VII |
Energy efficiency contribution | 3,5% |
Radio frequency | 868 MHz |
ESBE CRC111 | |
Power supply | 230 ± 10% V AC, 50 Hz |
Power consumption | 10 VA |
Running time at max. speed | 30 s |
Enclosure rating | IP41 |
Protection class | II |
ERP temperature controls class | III |
Energy efficiency contribution | 1,5% |

EMC 2014/30/EU
RoHS 2011/65/EU
PED 2014/68/EU, article 4.3

ErP2015

Dimensioning

Wiring
Valve characteristics VRG430, DN20

Valve characteristics VRG430, DN25

Options
Spare parts
Download area
Applications
Circulation unit with mixing valve together with controller for radiator circuit.
Products
GRC100, GRC200Circulation unit with mixing valve together with controller for district heating systems.
Circulation unit with mixing valve together with controller for district heating systems.