Connecting External Controls - REMEHA Avanta 12v Installation & Service Manual

fig. 16

Connecting external controls

The output of the Remeha Avanta can be controlled in the fol-
lowing ways:
On/off control – volt free switching - The boilers internal
control will modulate the output to achieve the flow tempera-
ture set point of the boiler. This contact is on the X9 terminal
strip (low voltage only).
On/off control – 230 V switching - The boilers internal con-
trol will modulate the output to achieve the flow temperature
set point of the boiler. This contact is on the X2 terminal strip
(230 VAC only).
Modulated control – Open Therm - The external controls will
modulate the boiler's output to achieve the flow temperature
determined by the modulating regulator. This contact is on the
X9 terminal strip (low voltage only).
Modulated control – Open Therm in combination with an
externally mounted simple 230 V switching time clock -
The boiler will provide room compensated heating and time
control over CH and DHW (System boiler).

• All connections on terminal X1, X2, X4, X5, X6 and X7 are
230 VAC.
• All connections on terminal X9 are low voltage only.
2.7 Connecting external controls
• Release the two screws at the bottom of the front casing,
release plastic clip below display and remove the front casing.
• Remove one of the supplied grommets in the base of the
boiler, fit a cable gland and feed the cables through.
• Connect the cables to the relevant connectors, as shown in
the diagrams.

• Isolate power supply at the fused spur before carrying out
any work on the boiler controls.
59970LTGBW7H012
18
Remeha Avanta