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The Water Valve Rebuild Kit contains all the parts needed to replace the water control valve assembly.

The water control valve assembly may need to be replaced when:

• Main burner will not turn on
• Main burner is on low flame
• Water is not hot enough, or as hot as usual

• Diaphragm
• “O” Ring
• Spindle
• Washers
• Retaining Clip
• Instructions

The Steca TA OP1 overvoltage protection unit is a connection socket in a splash-proof IP65 protective case and serves to protect the collector sensor against local lightning strikes and externally induced voltage spikes.

 A varistor protective diode protects against atmospheric overvoltages that can lead to the destruction of the collector sensor. The use of the Steca TA OP1 is generally recommended for extra protection of the collector sensor in any type of solar thermal system. In addition, the simple operation of the spring terminals allows rapid and simple installation of the collector sensors using a sensor extension cable.

Immersion sensors allow temperature recording in liquid and gaseous media and are designed for installation in existing or on-site immersion sleeves. The standard measurement unit contains a Pt1000 temperature sensor, according to DIN EN 60 751, class B, in a two-core connection.

Product features

■For installation in immersion sleeves

Our STR 1 includes everything that is needed for a thermal solar system. Apart from the controller for temperature differences an electronically controlled limitation of the storing temperature has been built in. Of course, it is possible to adjust hysteresis, temperature difference and max. storing temperature individually. By using the hand-gear control you can adjust the pump for testing or other operations. A display indicating the temperature informs you about the collector temperature to be stored. Another very important point was the breakdown safety switch which does not lower your solar system’s performance since it is very low in self-consumption. The regulator is supplied including a collector temperature sensor and a storage temperature sensor in the lower storage tank area for limiting the maximum storage temperature.

• Individually adjustable switch-on temperature difference, switch-off hysteresis and maximum storing temperature
• Display unit for the storing and collector temperature
• Temperature sensor with error flag
• Storing temperature limitation
• Easiest assembly and handling
• Coordinate safety concept
• Hand-gear control
• Status display