Characteristics

• Factory pre-assembled compact loading group, which ensures trouble-free and quick installation to heat storage and heat source systems
• The loading group provides a rapid rise in heat source temperature and storage loading starts automatically as soon as the operating temperature is reached, thus improving boiler efficiency and service life
• At the initial stage of loading, rapid storage tank temperature stratification makes it possible to obtain heat energy very quickly after the start of the combustion
• Automatic shut-off function closes the bypass line in the final stage of loading to ensure maximum loading the storage tank
• Return temperature is steplessly adjustable from 0 to 95 °C with a single control knob
• Ideal for use with water based fireplaces and stoves thanks to the easily adjustable return temperature, various heat sources can always be operated at optimum temperature
• The charging group is easy to maintain and all wearing parts are easily replaced without the need to drain the water system

Properties

Loading pump: Grundfos UPM3 AUTO L -50 (230 VAC 50/60 Hz 2-33 W)

Maximum boiler power: 65 kW (maximum flow ~2500 l/h)

Maximum operating temperature: 110 °C

Maximum operating pressure: 0,6 MPa (6 bar)

Return temperature: Stepless adjustment 0–95 °C

Connection: R 32 or R 25 or CU28mm (Integrated closing function)

Material: brass and cast iron

Backflow preventer and by-pass shutoff integrated in the mixing valve
Mechanical setting ensures that settings are maintained in the event of a power failure

Dimensions (width x height x depth): 385 x 175 x 165 mm

Weight: 4,1 kg

Delivery contents:

Motor unit / AMCTS-controller 24 VAC / 140s / 90-degrees / 5Nm

• IP41-protection class
• Manual switch and mechanical position indication on the front panel

External power supply, 230 VAC 50 Hz / 18 VAC, 300 mA

• 2,5 metre connection cable, DC plug connections directly to the motor part / controller

Supply water temperature sensor (NTC 2K2)

• 1 metre connection cable, RJ12-connector
• Pipe fastening ties

Union ball valves 3 pieces

• 1 ½” x 1 ¼” or 1 ½” x 1” or 1 ½” x CU28mm

Vexve AMV3231 3-way mixing valve

• 1530070 DN 40 kvs.15

Vexve Connector

• 1 ½” x 1 ½”

Grundfos-loading pump

• UPM3 AUTO L -50

Connection adapters to valves

Vexve AM series and Termomix valves, as well as other standard four-point attachment valves (adapters available for several other valves)

This device meets the following environmental requirements and standards:

• Operating temperature 0 … +40 °C
• Storage temperature −20 … +60 °C
• Shipping temperature −20 … +60 °C
• Humidity 0–100 % RH, non-condensing conditions
• RoHs 2002/95/EC
• CE-mark 93/68/EEC
• EMC-directive 2004/108/EEC
• LVD- directive 2006/95/EC
• General requirements for household control devices EN 60730–1:2000
• Special requirements for temperature controllers EN 60730-2-9:2002