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M2 Energy DN25

2-WAY UNMIXED PUMP UNIT DESIGNED TO FIT A HEAT/COOLING ENERGY METER

The unit for 1” (180 mm) circulating pumps consists of:

Supply
• Connection.
• Flanged ball valve with T-handle.
• High efficiency synchronous pre-wired circulating pump (for the models that include it).
• 3-way flanged ball valve supplied with in-handle thermometer (red ring, range 0°C-120°C). The third way M10x1 allows the dip fitting and the lead sealing of a ø5x45 mm sensor.

Return
• Flanged ball valve with 20 mbar check valve (which can be excluded by rotating the handle by 45°) supplied with in-handle thermometer (blue ring; 0°C-120°C).
• Distance piece made of plastic 1”x130mm that has to be removed, after having cleaned the installation, to fit the heat/cooling energy meter
• Flanged ball valve with T-handle.
• Connection.

Centre distance 125 mm.
EPP insulation box (Dimensions: 250x380x170 mm).

PN 10, max temperature 90°C.
External connections: 1” Female.

FIELD OF USE
For power up to 50 kW (with ∆t 20 K) and maximum flow rate 2150 l/h (*).
Kvs value: 8.0 (*).
Approximate data calculated with a 6 m head circulating pump.
For an accurate sizing or for higher flow rates, please refer to the curves shown in the instructions.
(*) The data are relevant to the pump unit without circulating pump and without heat/cooling energy meter installed.

Available circulating pumps:
Wilo Para 25/6 SC
Grundfos UPM3S Auto 25-60 
Wilo Para 25/8 SC

Installable heat/cooling energy meters:
DN20 - 1” x 130
Qn 2,5 

Code
Specifications
External connections
Circulator
203518-20 G 1" Female -
203518-P6-20 G 1" Female Wilo Para 25/6 SC
203518-A6-20 G 1" Female Grundfos UPM3S Auto 25-60
203518-P8-20 G 1" Female Wilo Para 25/8 SC

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