TacoHeat Mix

Pump assembly with mixer, actuator, high efficiency pump and shut-off ball valves with thermometer for heating circuits


The TacoHeat Mix pre-assembled pump assembly is suitable for heating circuits. It consists of a three-way mixer with actuator, high efficiency pump, two shut-off ball valves with integral thermometers and a non-return valve integrated into the return.


  • Compact: All necessary valves, accessories and components are fitted
  • Simple: Suction and pressure sides can be shut off for simple pump replacement
  • Efficient: High efficiency pump used with EEI ≤ 0.20
  • Flexible: Can be used with any heat generator


The integral three-way mixer with actuator regulates the required flow temperature to the selected set value in conjunction with the flow sensor and the consumer heating controller. The mixer has an internal bypass which ensures circulation of the return.
It reduces the high flow temperature from the heat generator down to the required level, which also results in an increase in the flow rate, as required for underfloor heating circuits.
This allows the actuator to operate across the entire setting range.
The high efficiency circulation pump has various operating modes which can be adjusted to suit the relevant heating circuit.
The non-return valve integrated into the return prevents incorrect circulation or heat backflow.

Technical Data


  • Operating temperature TB max: 110 °C
  • Operating pressure PB max: 10 bar
  • kVS value of mixing valve: 4 m³/h
  • Flow rate: max. 1200 l/h
  • Thread to DIN 2999/ISO 7 and ISO 228
  • Recommended application area:
    • Radiator heating system: 2000 l/h x 15 K = 35 kW
    • Underfloor heating system: 2000 l/h x 7 K = 16 kW (11.6 kW at 5 K)

Electrical connection information

Grundfos UPM3 HYBRID 15-70 130

  • Rated voltage: AC 230 V
  • Permissible voltage deviation: +10 % – 15 %
  • Rated frequency: 50/60 Hz
  • Power consumption: Speed P1 [W] min. 2, max. 52 I1/1 [A] min. 0.04, max. 0.52
  • Protection rating: IP 44
  • EEI ≤ 0.20

UNI 3P rotary drive

  • Rated voltage: AC 230 V
  • Permissible voltage deviation: ± 10 %
  • Rated voltage: AC 230 V ± 10 %
  • Rated frequency: 50 Hz
  • Actuating signal: 3-point floating SPDT
  • Power consumption: 6 VA
  • Runtime: 147 s/90°
  • Torque: 15 Nm
  • Protection rating: IP 44


  • Base plate: zinc-plated sheet steel
  • Back panel and cover: stylish EPP insulation
  • Flow:
    • Ball valve: hot-pressed brass, nickel-plated
    • Circulation pump: cast iron
    • Three-way mixer: brass
    • Servomotor housing: plastic
  • Return:
    • Ball valve: hot-pressed brass, nickel-plated
    • Connection pipe: plastic
    • Tee for three-way mixer: brass
    • Non-return valve: plastic
  • Gaskets/seals: EPDM, PTFE

Flow Media

  • Water mixtures with standard corrosion and antifreeze additives (indicator scale for viscosity of medium υ = 2.3 mm²/s)
  • Heating water (VDI 2035; SWKI BT 102-01; ÖNORM H 5195–1)
  • Cold water

Building categories

  • Apartments, apartment buildings
  • Detached houses, estates of detached houses
  • Multi family homes

Type Overview

TacoHeat Mix

Heating circuit pump assembly
Order no. Thread Equipment
277.1200.000 G 1" / Rp ¾" Mixing valve, actuator and high efficiency pump