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, GRA131

GRA112, GRA132

Series GRA111

Art.no.	Reference	DN	Pump	Connection I	Connection J	Weight kg	Note	NTCNTC = National Trade Code
61040100	GRA111	25	Wilo 25/6	G 1"	G 1½"	5.7	230V, 3 point control signal ARA661
61040400	GRA111	32	Wilo 25/7.5	G 1¼"	G 1½"	6.4	230V, 3 point control signal ARA661

Series GRA112

Art.no.	Reference	DN	Pump	Connection I	Connection J	Weight kg	Note	NTCNTC = National Trade Code
61040500	GRA112	25	Grundfos 25-50	G 1"	G 1½"	5.8	230V, 3 point control signal ARA661
61040600	GRA112	32	Grundfos 25-70	G 1¼"	G 1½"	6.5	230V, 3 point control signal ARA661

Series GRA131

Art.no.	Reference	DN	Pump	Connection I	Connection J	Weight kg	Note	NTCNTC = National Trade Code
61043200	GRA131	25	Wilo 25/6	G 1"	G 1½"	5.7	24V, Proportional signal ARA639
61043300	GRA131	32	Wilo 25/7.5	G 1¼"	G 1½"	6.4	24V, Proportional signal ARA639

Series GRA132

Art.no.	Reference	DN	Pump	Connection I	Connection J	Weight kg	Note	NTCNTC = National Trade Code
61043400	GRA132	25	Grundfos 25-50	G 1"	G 1½"	5.8	24V, Proportional signal ARA639
61043500	GRA132	32	Grundfos 25-70	G 1¼"	G 1½"	6.5	24V, Proportional signal ARA639

Installation support

Operation

Installation examples

Movie

Guidance for installers, Circulation Units

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

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

ErP 2009/125/EC
ErP 2015

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

Image	Art.no.	Reference	Designation	Note
GMA121 Manifold for 2 circulation units, without integrated hydraulic separator function.	66000100	GMA121	Manifold GMA121	Manifold for 2 units.
GMA131 Manifold for 3 circulation units, without integrated hydraulic separator function.	66000200	GMA131	Manifold GMA131	Manifold for 3 units.
GMA221 Manifold for 2 circulation units, with integrated hydraulic separator function.	66000300	GMA221	Manifold GMA221	Manifold for 2 units, with integrated hydraulic separator function.
GMA231 Manifold for 3 circulation units, with integrated hydraulic separator function.	66000400	GMA231	Manifold GMA231	Manifold for 3 units, with integrated hydraulic separator function.

Spare parts

Image	Art.no.	Reference	Designation	Note
GSP901 ESBE GSP901 Pump RKA 25/6 Wilo	67000100	GSP901	Pump RKA 25/6 Wilo	DN25
GSP901 ESBE GSP901 Pump RKA 25/7.5 Wilo	67000300	GSP901	Pump RKA 25/7.5 Wilo	DN32
GSP901 ESBE GSP901 Pump UPM3 25-50 Grundfos	67000400	GSP901	Pump UPM3 25-50 Grundfos	DN25
GSP901 ESBE GSP901 Pump UPM3 25-70 Grundfos	67000500	GSP901	Pump UPM3 25-70 Grundfos	DN32
GSP903 ESBE GSP903 Thermometer upgrade set, 2 pcs/package	67000600	GSP903	Thermometer upgrade set, 2 pcs/package
GSP911 ESBE GSP911 Ball valves incl thermometer DN 25, 2 pcs/package	67003400	GSP911	Ball valves incl thermometer DN 25, 2 pcs/package	DN25
GSP911 ESBE GSP911 Ball valves incl thermometer DN 32, 2 pcs/package	67003500	GSP911	Ball valves incl thermometer DN 32, 2 pcs/package	DN32
GSP910 ESBE GSP910 Insulation circulation unit DN 25/32	67004400	GSP910	Insulation circulation unit DN 25/32

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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