Caleffi 278HE Series circulation group 3/4" F connections return connection with UPM3 pump - 1-13 l/min.
The Caleffi 278HE Series circulation group has the function of regulating the temperature inside the boiler and is used on the primary circuit of solar systems . Safety devices are inserted in the group in order to guarantee regular monitoring of the circuit. This version has a return connection and is equipped with a Grundfos UPM3 Solar 15-75 high efficiency circulation pump with PWM control, 3/4 F connections. The PWM technology guarantees a drastic reduction in the power dissipated by the group resulting in greater system efficiency .
The Caleffi Series 278HE circulation group is composed of: Solar circulation pump, Series 253 safety valve for solar systems, fill/drain tap, instrument holder fitting with pressure gauge, flow meter, return thermometer, shut-off and check valve, 2 hose holders , preformed shell insulation.
The installation must be carried out by qualified and authorized technical personnel.
TECHNICAL FEATURES
- Connections: G 3/4" (ISO 228-1) F
- Maximum operating pressure: 10 bar
- Fluid temperature range: -10 – 110 °C
- Calibration: 6 bar
- Power supply: 230 V (AC)
- Maximum percentage of glycol: 50%
- Fluid of use: water, glycol solutions
- Flow meter scale: 1-13 l/min.
- Pump type: UPM3 15-75.
WARRANTY
The guarantee is the official Caleffi one and lasts 2 years.
