The S2 Solar 3 pump unit is a high quality, European manufactured, sinlge line solar pump group with a Wilo 25/6 solar circulating pump. Supplied fully assembled and leak tested. Designed so that DN16 stainless steel flexi pipe can be connected directly to the unit without need for adaptors, leading to faster installation with less time consuming assembling/fitting work.

S2 Solar 3 Pump Unit Details

Return line of pump unit

• Flowmeter with flow regulator, filling point and draining point
• Wilo ST 25-6 solar circulating pump with molex plug in cable
• Flanged 3-way DN20 ball valve with 10mbar non-return valve - NRV can be made in operable by turning handle 45°
• Blue coded temperature gauge (0°C to 120°C)
• Safety unit with 6 bar safety valve, 63mm diameter manometer and 3/4" flat faced BSP connection for linking in expansion vessel

Flow line of pump unit

• Flanged 3-way DN20 ball valve with 10mbar non-return valve - NRV can be made in operable by turning handle 45°
• Red coded temperature gauge (0°C to 120°C)
• Air seperator unit

Pump unit, General

• Pipe connections are 3/4" flat faced BSP to allow for direct fitting of DN16 flexi pipe.
• EPP insulation box with dimensions 155mm x 425mm x 150mm
• Constant maximum operation temperature 120°C
• Short term (20 secs) maximum operation temperature 160°C