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The most environmentally-friendly method of domestic hot water heating, as well as a backup/supplement for low-temperature heating purposes. Thanks to the highly effective Sol-Titan coating, the vacuum tube collector Vitosol 300-T can even utilize diffused solar radiation. It is therefore suitable not only for domestic hot water applications, but also as a backup for central heating purposes. Absorber surface area: 22 and 32 sq.ft / 2 and 3 sq.m

Model		SP3 2m	SP3 3m
Absorber Surface Area	sq. ft sq. m	22 2.05	33 3.07
Optical Efficiency	%	82.5	82.5
Collector Dimensions
Width	inches mm	55¾ 1419	83¾ 2126
Height	inches mm	78½ 1996	78½ 1996
Depth	inches mm	4¾ 122	4¾ 122
Weight	lbs kg	99 45	150 68

The iSolar™ BX is a multi-functional temperature differential controller with add-on system functions for use in a wide variety of solar thermal heating applications. iSolar™ BX is equipped with four relay outputs; three triac pump speed control relays and one standard relay. These outputs include two pulse width modulation (PWM) outputs that enable energy conservation measures for high-effi ciency direct current (DC) pumps. The controller is equipped with fi ve Pt1000 sensor inputs, two analog Grundfos sensor inputs, and one impulse fl ow meter input. Twenty six system confi guration options are predefi ned for control of a standard solar water heating system, drainback systems, supplemental space heating, multiple storage tanks, heat dump and storage tank booster heating.

The new Steca TR 0502 solar thermal controller closes the gap between the already successful Steca TR 0301, TR 0301sc and TR 0603 temperature difference controllers.

With its animated graphic display and elegant design, it continues the success enjoyed by this family of controllers. This controller provides everything to operate your solar thermal system safely over a long service life. The Steca TR 0502 controller monitors and controls solar thermal systems with up to two differently oriented collector arrays and a maximum of two domestic hot water or buffer storage tanks. The large graphic display shows the animated control circuits, which allows you to view the operating statuses of each system. The clearly arranged display ensures easy operation using pictograms. Pre-programmed systems enable universal usage. The Steca TR 0502 controller has five inputs for recording temperatures or pulse values, as well as two outputs (one is speed-controlled) for controlling pumps or switching valves.

The Vitosol 100-F is an economy series flat plate collector that offers high performance and quality construction at an affordable price. Ideal for any solar thermal application especially domestic hot water (DHW) or pool heating. Absorber surface area: 25 sq.ft / 2.3 sq.m

Model		SV1	SH1
Installation		Vertical	Horizontal
Absorber Surface Area	sq. ft sq. m	25.0 2.32	25.0 2.32
Optical Efficiency	%	74.3	74.3
Collector Dimensions
Width	inches mm	41¾ 1056	93¾ 2380
Height	inches mm	93¾ 2380	41¾ 1056
Depth	inches mm	2¾ 72	2¾ 72
Weight	lbs kg	95 43	95 43

Single or dual heat exchangers The Stiebel Eltron SB/SBB series water heaters are indirectly fired and are equipped with either one or two large heat exchangers. The heat exchangers are heavy gauge steel with procelain enamel coating.

Flexible options The models with a single heat exchanger can be used for solar applications with some form of external backup heater. On the models with dual heat exchangers, the upper coil is typically connected to a space heating boiler fired by any fuel and the lower coil is connected to the solar panels.

Multiple uses. All Stiebel Eltron SB/SBB series water heaters can also be used as high capacity indirectly fired water heaters in conjunction with any type of heating boiler.