How it works: Retrofitting FLEXIRO Radint Wall Heating with Plug-In Drywall System

SCOPE OF DELIVERY Complete “Wall heating for drywall construction” kit

The detailed scope of the kit is described in the PDF installation guide. You will also find further accessories and suitable tools in the FLEXIRO Shop.

NOTE:

The same also applies to FLEXIRO wall heating: working on heating systems requires sufficient technical knowledge and skills. If necessary, have the installation carried out by a professional installer.

IMPORTANT NOTES BEFORE STARTING THE INSTALLATION

The arrangement of the individual wall heating elements must be determined when beginning the installation work. Since the wall elements cannot be cut to size, custom-cut panels may be required along the edges of the planned heating surface. You can obtain suitable gypsum plasterboards from DIY stores or specialist dealers. All installations in the wall surface, such as light switches or sockets etc., cannot be installed in the dry construction elements. You should also insert commercially available gypsum plasterboards as strips at these points. The edge junctions around the wall surface must then be filled later with a permanently elastic sealant.

IMPORTANT NOTES BEFORE INSTALLATION

The FLEXIRO connection hoses can generally be shortened. When installing the the wall heating kits 6 or 8, however, it must be ensured that the differences in length (max. 15%) between the two connection hoses leading to the KOMPA Box do not become too great. There is a risk of uneven heat distribution. It is not a problem if the connection hoses are too long. The excess length is distributed in the wall cavity.

When setting the fixing screws with which the wall heating elements are mounted on the substructure, please use only the edge area of the longitudinal sides of the elements with a maximum distance of 2cm to the outer edge. Never drill or screw into the surface of the elements. This could damage the heating pipes. The manufacturer is not liable for damage caused by disregarding this specification.

PREPARING THE INSTALLATION

The installation wall must be level, clean, dry and stable.

Any unevenness must be levelled out when fixing the substructure.

Before installing the wall heating elements, determine the position of the KOMPA Box so that you know exactly where you need to lead the pipes.

The arrangement of the wall heating and the positioning of the KOMPA boxes can be designed individually. There is no general solution here. Please ensure that the control valve can always be reached later. The pipe ends of the connecting hoses must be at a distance from the floor so that they can be inserted into the individual connections after installation of the KOMPA-Box.

INSTALLING THE CONTROL BOX

To ensure efficient temperature control, the Kompa Box should be positioned in such a way that the thermostatic head can measure the temperature of the indoor air and the air can flow around it unhindered.

The separately enclosed installation and operating instructions must be observed.

FITTING THE SUBSTRUCTURE

A 60 x 60 mm squared timber substructure is vertically mounted on the existing wall.

The squared timber upright members (studs) on which the drywall elements of the wall heating system will later be mounted must be perpendicularly positioned with exactly 600 mm centres.

The mounted squared timber studs end about 150 mm above the floor in each case. Two further squared timber members should be fixed horizontally along the junctions with the floor and ceiling, crosswise to the squared timber studs already mounted vertically.

PREPARING AND INSTALLING THE WALLING ELEMENTS

Remove the FLEXIRO wall elements from the packaging. Two people should work in order to prevent damage to the elements.

The arrangement of the heating pipes can be seen on the back of the drywall elements. On the connection side (a short side of the element), the connection pipe ends should be removed from the transport position.

INSTALLING THE DRYWALL HEATING ELEMENTS

The elements of the wall heating are mounted centrally on the squared timber by means of drywall screws suitable for timber substructures. The distance between the lower edge of the element and the floor must be about 40 cm.

INSTALLATION CONNECTING HOSES

After inserting the support sleeves into the pipe ends, connect three FLEXIRO wall elements to each other via the plug-in connectors and the 500 mm short connection hoses.

Now connect the supply and the return for the first and respectively third wall element with the 3000 mm-long connection hoses to the KOMPA Box (different length for larger kits).

INSTALLATION CONNECTING HOSES

The connection hoses must be laid free of twists and with a bending radius of not less than 200 mm.

Cut out any kinks or damaged areas on the connection hose. The pipe must be reconnected with a permanently tight coupling (see Plug-in connector under Accessories). The same procedure should be followed if the pipes have to be extended.

CONNECTING TO THE KOMPA-BOX

The distributor arms are connected to the KOMPA Box using the Eurocone connector. The Eurocone has a self-sealing effect while the metal screw connection has a purely safety-related function. Over-tightening should be avoided as this would compromise the safety of the wall heating system.

CONNECTING TO THE KOMPA BOX

The following illustrations show the arrangement of the heating pipes in the KOMPA Box. The heating pipes are connected to the distributor arms using the simple plug-in assembly. The heating pipes that have just been cut and possibly shortened are inserted directly into the plug-in connections of the distributor arms up to the stop.

CONNECTING TO THE HEATING SYSTEM

Make sure that the supply and return lines are correctly connected in the KOMPA Box. Mixing up the supply and return lines in the KOMPA Box will disable the thermostatic valve and even prevent the flow through the FLEXIRO wall heating system.

PRESSURE TESTING THE HEATING SYSTEM

Make sure that the system and all associated components are correctly installed before putting the wall heating system into operation.

Follow our detailed instructions for the pressure test in the PDF installation guide.

TESTING THE WALL HEATING

Make sure you conduct a trail run before sealing the wall surface. This is the last opportunity to correct installation errors or damage.

CLOSING THE WALL AREA

The gypsum plasterboard which is fitted in the peripheral areas to the adjoining walls, ceiling and floor must have a 12.5 mm thickness. The joints to the adjacent building components must be flexible so that the heating surface does not crack as a result of the expansion movements caused by heat. Please follow manufacturer's instructions.

CONCLUDING WALL HEATING WORK

Fill and then sand the joints in accordance with the installation guidelines for drywall construction.

COMMISSIONING (HEATING UP PROCESS)

After completion and complete drying of joint fillers, paints and surface coverings, the wall heating system can be put into operation.

During the first hours of operation, the desired surface temperature is set on the thermostatic valve head of the KOMPA Box.The wall heating system is a radiant heating system. The sense of warmth is very direct. Tip: Adjust the temperature according to your sense of comfort and not according to the value you read on a thermometer.

Connection diagram for 3 wall heating elements

Installation Wall heating detail showing the connection between the elements