Baxi Duo-tec 2 Combi 24 GA Manuel d'utilisateur télécharger pdf (Page 23)

18.0 External Low Voltage Controls

18.1 Positioning the Optional Outdoor Sensor

1. The Sensor must be fixed to an external wall surface of

the property it is serving. The wall must face a north or west.

NOTE: DO NOT position it on a south facing wall in

direct sunlight !

2. The Sensor should be approximately half the height of the

living space of the property, and a minimum of 2.5m above

ground level.

3. It must be positioned away from any sources of heat or

cooling (e.g. flue terminal) to ensure accurate operation.

Siting the Sensor above doors and windows, adjacent to

vents and close to eaves should be avoided.

18.2 Connecting the Optional Outdoor Sensor

1. Ensure the electrical supply to the boiler is isolated. Undo

the securing screws and lift the case front panel off.

2. Disengage the securing tab and hinge the control box

downwards. Undo the terminal block cover securing screw

and remove the cover.

3. Remove one of the grommets, pierce the diaphragm and

insert the wires from the Outdoor Sensor.

4. Leave sufficient slack in the wires to allow the Control Box

to be hinged fully open. Refit the grommet.

5. Connect the wires from the Outdoor Sensor to positions

4 & 5 on M2 as shown. Refit the cover.

18.3 Setting the Sensor Curve

1. Ensure that there is power to the boiler.

2. The Central Heating temperature buttons &

are used to select the desired curve as shown on the graph.

3. Normally the display will show the current temperature of

the water in the boiler (e.g. 41°C). As the buttons are

pressed the curve identification code the will be shown, from

‘00’

‘90’

For example, if Curve

‘40’

is selected, at an outside

temperature of 5°C the boiler flow temperature will be

just below 70°C. In the event of the outside temperature

falling to 0°C, the boiler flow will increase to 80°C.

3. Continue with the installation and commissioning of the

boiler as described in the Installation & Servicing Instructions.

4. Explain to the user how to select a different temperature

curve.

Outdoor Temperature

Boiler Flow

Temperature

North

West

1/2 H

2.5m Min

Optional Outdoor Sensor

1 2 ... 18 19 20 21 22 23 24 25 26 27 28

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Baxi Duo-tec 2 Combi 24 GA Manuel d'utilisateur Page 23

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