REMEHA Avanta Plus 24s, Installation And Service Manual

Page: 20 / 153

20
Remeha Avanta Plus
1
2
Manufacturer Sit Controls
Supply voltage 230 V – 1ph – 50 Hz
Pre-purge time 3 s
Post-purge time 5 s
Ignition time 2.5 s
Safety time 5 s
Anti-cycling time 3 till 10 min.
Fuse value F1 (230 V) 2 AT
DC fan (for 24s, 35c and 28c) 24 VDC
AC fan (for 39c only) 230 VAC
table 04 Control unit characteristics
m
Any loads other than those specified above are only allowed if
an isolating transformer is used.
The output of the Remeha Avanta Plus can be controlled in
the following 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).
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).
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 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).
z
• 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
and remove the front casing.
• Feed the cables through the grommet in the base of the
boiler.
• Connect the cables to the relevant connectors, as shown in
the diagrams.
LT.AL.W7H.000.024
{
•
Isolate power supply at the fused spur before carrying out
any work on the boiler controls.