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

2. Installation
fig. 22 Wiring diagram on/off control
R000152-B
fig. 23 Wiring diagram for an external 230 V time clock
R000197-A
22
X9
R000152-B
X2
R000197-A
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.
• R emove existing link between connectors 7 and 8 of the X9
terminal block before use;
• C onnect 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.
• F or 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.
• F or 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.
Remeha Avanta Plus
.
127768-271011