Pump station for solar thermal systems return connection with UPM3 pump Caleffi 278HE

Pump station for solar thermal systems return connection with UPM3 pump Caleffi 278HE

Circulation units are used on the primary circuit of solar thermal systems to control the temperature in the hot water storage. The pump inside the units is activated by the signal arriving from the regulator. The units contain the functional and safety devices for optimum circuit control. They are available with flow and return connection or with return connection only. The return connection is available in versions fitted for/not fitted for connection to the digital regulator. The units are equipped with a high efficiency pump with PWM control. Combinable with the DeltaSol® SLL digital regulator (code 278005) with PWM control (optional) suitable for the management and control of 9 different types of solar thermal systems also in the version with insulating casing and protective panel.

Product description:

Pump station for solar thermal systems, return connection.

Electric supply: 230 V (AC).

Max. working pressure: 10 bar.

Safety relief valve temperature range: -30–160 °C.

Safety relief valve setting: 6 bar (for other setting, see 253 series using the adapter code F21224).

Flow meter temperature range: -10–110 °C.

Max. percentage of glycol: 50 %.

Consisting of:

- Solar circulation pump;

- safety relief valve for solar thermal systems 253 series;

- fill/drain cock;

- instrument holder fitting with pressure gauge;

- flow meter;

- return temperature gauge;

- shut-off valve with check valve;

- 2 hose connections;

- pre-formed shell insulation.

* With PWM control