The S2 Solar 30 pump unit is a high quality, European manufactured, twin 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 30 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

TDC3 Controller Details

All S2 Solar 30 solar pump units come with a pre-fitted and prewired TDC 3, twin relay solar controller. The Wilo pump has a quick release molex plug that allows the from cover of the pump unit tot be completely removed during installtion.

Compact design High-contrast lighted display with extensive full-text and graphic mode Self-explanatory operation via 4 softkey entry keys Support for initial parameter setting with integrated setup assistants Various collector, storage and frost protection programs Special start logic for vacuum tube collectors and self-dumping systems Data storage unit with comprehensive statistics and graphic analysis for long-term monitoring of the system Function control by simple heatmetering Error memory and analysis with date and time 15 different solar confugurations pre-programmed in controller Setup Wizard simplifies setup procedure On-board statistics Variable pump speed control

The controller is suitable for use with 15 different solar system configurations, details can be seen in the images below.