Solar Controllers, Solar Water Pumps

The SPP Pump Station is a pre-assembled unit designed for transferring heat from solar thermal collectors to a storage tank. These pump stations are used on the primary circulating loop of solar hot water heating systems to control the temperature of the water in the storage tank. The pump inside the unit is activated by the signal from the differential controller, which is inset into the pump station. The unit contains functional and safety devices for optimal control of solar water heating, and are available with a return connection only.

Design Features: Check valve to prevent thermo circulation-Valves for flushing, filling, and emptying the system-Flow control valve with flow meter for displaying and setting the flow rate-In line thermometer for displaying return temperatures-Pressure gauge for displaying the system pressure-Safety relief valve to prevent overpressure-Three-speed Wilo solar pump for wide range of flow rates.

The SPP iSolar controller (below) is integrated into the pump station.

The SPP iSolar Controllers come in 4 different models and feature multi-functional temperature control with additional functions available depending on model. The controllers can be used for a wide variety of applications and has inputs for four PT-1000 sensors. Preset factory defaults are defined for control of a solar water heating system, and have a built in second relay (some models) to divert any surplus heat that may be generated by the solar thermal collectors. The auxiliary relay can also be used to maintain tank temperature, protect the system from overheating, or divert the excess heat to another source.

This controller features a large Liquid Crystal Display (LCD) screen & user interface, complete with three function keys. The easy-to-use icons assist both end-users and installers to operate, diagnose, and customize a solar heating system.

System Screen LCD Display with 16-segment display & 8 symbols for system status - Operating LED control lamp and 3 push-button control -Δ T Control -Maximum tank temperature control -Heat generation measurement kWh (BTU)-Two relay models feature various advanced control options.