On/Off Control - Room Temperature (Volt Free Switching); Time Control Using An Internal Or External 230 V Clock - REMEHA Avanta Range 24c Installation & Service Manual

Terminal
Block X9
1
2
3
4
5
Exist
links
6
7
Modulating - using Open Therm control
eg: Honeywell Chronotherm or Celcia 20
8 On / Off - using simple volt free switching control
fi g. 21 Wiring diagram on/off control
LT.AL.W7H.000.026c
Terminal
Block X2
5 N
Power supply to external time clock -230v
4 L
Switch live (230v) from external time clock DHW demand
3
Remove existing link 4-3 to use this function
Exist
2
links
Switch live (230v) from external time clock HTG demand
1
Remove existing link 4-1 to use this function
fi g. 22 Wiring diagram for an external 230 V time clock
LT.AL.W7H.000.027
X9
X2
Remeha Avanta Plus
2.7.1 On/off control – room temperature (volt free
switching)
The Remeha Avanta Plus can be connected to a 2-wire on/
off volt free heating control, programmer or thermostat, ie
Remeha Celcia 10. Mount the thermostat in a reference room
usually the living room.
• Remove existing link between connectors 7 and 8 of the X9
terminal block before use;
• Connect the 2-wire programmer or room thermostat to
connectors 7 and 8 of the X9 terminal block.

If a room thermostat with an anticipation resistor is being used,
parameter p5 should be changed from 0 to 1, see par.
2.9.8.
2.7.2 Time control using an internal or external
230 V clock

When the switch spur is on, the terminal block X2 will be live
(230 V).
• A 230 V two channel time clock for CH and DHW control
can be connected to the Remeha Avanta Plus
Live 230 V supply for the time clock - connect to connectors
4 (L) and 5 (N) on X2 terminal block.
• For CH - remove existing link between connectors 4 and 1
of the X2 terminal block and connect the 230 V output from
the time clock to terminal 1 on the terminal block X2.
• For DHW - remove existing link between connectors 4 and 3
of the X2 terminal block and connect the 230 V output from
the time clock to terminal 3 on the terminal block X2.

For this option to function correctly a link or room control must
be fitted between connectors 7 and 8 of X9 terminal block
(remove existing link before use).
For continuous DHW on, when using a combi boiler, the link
across connectors 3 and 4 MUST NOT be removed
If the 230 V supply for the external time clock is not taken from
the boiler – terminal block X2 connections 4 & 5, it must be
taken from the same phase as the boiler 230cv supply and
correct polarities observed.
22
.