http://www.solar.lynnautorepair.com/content/liquid-pump-thermal-solar-sy...
Design

Glandless circulation pump with threaded connection. Preselectable speed stages for power adjustment

Application

Hot-water heating systems of all kinds, industrial circulation systems, cold water systems and air-conditioning systems

Type key

Example: Wilo-Star-RS 25/4
Star-RS Standard pump (screw-end pump)
25/ Nominal connection diameter R
4 Nominal delivery head [m] at Q = 0 m3/ h

Special features/product benefits

* Suitable for any installation position with horizontal shaft; terminal box in 3-6-9-12 o'clock position
* Pre-selectable three speed stages for load adjustment
* Easy, safe installation with the practical wrench attachment point on the pump body
* Simplified electrical installation through the terminal box with removable threaded cable connection that can be used on both sides; quick connection with spring clips

Technical data

* Permissible temperature range --10°C to +110°C
* Mains connection 1~230 V, 50 Hz
* Protection class IP 44
* Threaded connection Rp ½, Rp 1 or Rp 1¼
* Max. operating pressure 10 bar

Equipment/function

Operating modes

* Speed-stage switching

Manual functions

* Selection of speed stages (3 speed stages)

Equipment

* Wrench attachment point on pump body
* Cable entry possible on both sides
* Quick connection with spring clips
* Blocking current-proof motor

Materials

* Pump housing: Cast iron
* Impeller: Plastic
* Shaft: stainless steel
* Bearing: metal-impregnated carbon

Scope of delivery

* Pump
* Seals
* Installation and operating instructions

Options

* Version ...RG with housing made of red brass
* Version ... -130 with short overall length of -130 mm

Accessories

* Screwed connections
* Adapter fittings
* Thermal insulation shells