Connecting A Modulating Control - Room Or Outside Compensation; Connecting An Outside Temperature Sensor - REMEHA Avanta 12v 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
fig. 20 Wiring diagram modulating regulator
Terminal
Block X9
1
Outside sensor (red band) for direct boiler weather compensation
or when used in conjuction with a compatable Open Therm
2 control eg: Chronotherm or Celcia 20
3
4
5
Exist
links
6
7
8
fig. 21 Wiring diagram outside temperature sensor
75
60
40
20
-15 0
fig. 22 Heat curve Remeha Avanta
X9
LTALW7H000028
X9
LTALW7H000029
Factory setting
10 20
LTALW7H000030
2.7.4 Connecting a modulating control – room or
outside compensation
The Remeha Avanta has an OpenTherm
bles our modulating range of OpenTherm
the Remeha Celcia 15 or 20) to be connected without any fur-
ther modifications.
• Mount the control in a reference room (usually the living
room).
• Remove existing link and connect the two-wire interface
cables to connectors 7 and 8 of the X9 terminal strip.
• When using the Celcia 20 it is possible to add an outside
sensor to provide weather compensation with room adjust-
ment. Connect the outside sensor to connectors 1 and 2 on
the X9 terminal strip.
If the DHW water temperature on the OpenTherm
be adjusted, then the Remeha Avanta will supply water at the
temperature determined at the OpenTherm
being set in the boiler.
OpenTherm is an industry standard modulating control avail-
®
able from several control manufacturers.

The Remeha Avanta can therefore be controlled directly by
any other controls with this OpenTherm
2.7.5

Connecting an outside temperature sensor

An outside temperature sensor can be connected to connec-
tors 1 and 2 of the X9 terminal strip.
The boiler will regulate the output using the set point of the
internal heat curve.
This can be set as follows:
- Outside temperature minimum set point = -15°C (adjustable
with parameter p29 to between 0 and -30°C)
- Outside temperature maximum set point = 20°C (adjustable
with parameter p28 to between 0 and 40°C)
- Flow temperature set point at maximum outside tempera-
ture = 20°C (adjustable with parameter p27 to between
0 and 60°C)
- Flow temperature set point at minimum outside temperature
= 20°C (adjustable with parameter p1 to between
20 and 85°C)

An outside sensor used in conjunction with a simple 230 V
time clock will provide easy to set up and operate - timed
weather compensation heating based on the above graph.
21
interface. This ena-
®
room controls (e.g.
®
control can
®
® with the maximum
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