Stiebel Eltron SB AC с 08.06.2009: inStAllAtion inStAllAtion

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8.3.3  Preparing the DHW circulation line connection, if 

applicable

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You can fit a DHW circulation line to the DHW circulation 

connection, or you can use the thermometer connection where 

appropriate (see chapter “Specification / Dimensions and 

connections”).

SB 302 S and SB 402 S

Fit the cylinder casing before making the water 

connection and, if necessary, the DHW circulation line 

or the flanged immersion heater.

The plinth trim should be fitted after the tightness 

check.

»

If you install a DHW circulation line on the DHW circulation 

connection, cut an opening in the cylinder casing for the DHW 

circulation line near the connection (indentation in the foam).

»

Remove the thermal insulation near the connection.

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Route the DHW circulation line through the opening in the 

cylinder casing and fit the DHW circulation line.

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Insulate the connection for the DHW circulation line.

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Insert the 1/2” adaptor supplied with flat gasket and an extension.

»

Cover the hole in the cylinder casing with the adhesive rose 

supplied. 

SB ac

With this appliance type the thermal insulation must be 

fitted before connecting a DHW circulation line:

Extend the DHW circulation connection to approx. 

150 mm. Fit the thermal insulation. For this, observe 

chapter "Fitting the thermal insulation". 

Fit the DHW circulation line.

8.3.4  Fitting the thermal insulation

The thermal insulation is available as accessory (see chapter 

“Appliance description / Accessories”).

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Fit the thermal insulation according to the instructions supplied. 

For this, ensure that there is enough space for the installation 

task.

SB 602 ac and SB 1002 ac

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Insert the anode indicator extension through the hole in the 

cover plate.

8.3.5  Fitting special accessories

SB AC: The polystyrene cap in the lower flange aperture 

is also designed to position the thermal insulation 

correctly above the flange apertures. If you fit the 

special accessories into the lower flange aperture, 

then push the polystyrene cap into the upper flange 

aperture.

»

Install the special accessories in accordance with the operating 

and installation instructions supplied.

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Close the flange apertures with an indirect coil, flanged 

immersion heater, dummy flange or threaded immersion heater. 

Maintain the DC separation towards the cylinder.

8.3.6  Fitting the water connection and the safety assembly

Carry out all water connection and installation work 

in accordance with regulations.

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Flush the line thoroughly.

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Install the DHW outlet line.

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Size the drain so that water can drain off unimpeded when the 

safety valve is fully opened. The safety valve discharge aperture 

must remain open to the atmosphere.

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Fit the discharge pipe of the safety assembly with a constant 

slope.

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Observe the information in the safety assembly installation 

instructions.

8.3.7  Fitting the thermometer

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6

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Insert the thermometer as far as it will go and align it.