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M2 MIX33 DN25

2-WAY PUMP UNIT WITH 3-WAY MIXING VALVE WITH BUILT-IN BY-PASS

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

Supply
• Connection.
• 3-way mixing valve with adjustable by-pass. Through the by-pass (adjustable from the front part) it is possible to mix on the supply line a quantity of water coming back from the return line of the system.
• High efficiency synchronous pre-wired circulating pump (for the models that include it).
• Flanged ball valve supplied with in-handle thermometer (red ring, range 0°C-120°C).

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).
• Magnetic filter (in the models where it is present)
• “T” Connection for mixing valve.
• Connection.

Centre distance 125 mm. EPP insulation box (Dimensions: 250x380x170 mm).
PN 10, max temperature 110°C (unit without pump).
External connections: 1” Female.

FIELD OF USE
For power up to 38 kW (with Δt 15 K) and maximum flow rate 2200 l/h.
Kvs Value: 7.0.
For an accurate sizing or for higher flow rates, please refer to the curves shown in the instructions.

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

Code
Specifications
External connections
Circulator
Servomotor
Dirt separator
20355R-M33 G 1" Female - - -
20355R-M33-P6 G 1" Female Wilo Para 25/6 SC - -
20355R-M33-A6 G 1" Female Grundfos UPM3S Auto 25-60 - -
20355R-M33-P8 G 1" Female Wilo Para 25/8 SC - -
203652-M33 G 1" Female - -
203652-M33-P6 G 1" Female Wilo Para 25/6 SC -
203652-M33-A6 G 1" Female Grundfos UPM3S Auto 25-60 -
203652-M33-P8 G 1" Female Wilo Para 25/8 SC -
20355R-M33-M21 G 1" Female - -
20355R-M33-AHC G 1" Female - ● With weather-compensated controller -
20355R-M33-P6M21 G 1" Female Wilo Para 25/6 SC -
20355R-M33-A6M21 G 1" Female Grundfos UPM3S Auto 25-60 -
20355R-M33-P8M21 G 1" Female Wilo Para 25/8 SC -
20355R-M33-P6AHC G 1" Female Wilo Para 25/6 SC ● With weather-compensated controller -
20355R-M33-A6AHC G 1" Female Grundfos UPM3S Auto 25-60 ● With weather-compensated controller -
20355R-M33-P8AHC G 1" Female Wilo Para 25/8 SC ● With weather-compensated controller -

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