Auto Function - Ariston CLAS ONE R 24 Installation And Servicing Instruction

AUTO function

The AUTO function determines the best power output and flow tem-
perature for the heating system by continually monitoring demand.
It uses advanced modulating technology to closely track demand
and matches output with the highest precision. This ensures that
either with or without the addition of further controls the activation
of the AUTO function will enhance boiler performance. Optimum
performance can be achieved by the addition of an outdoor sensor
and indoor modulating controls.
Depending on the peripheral units connected and the number
of zones controlled, the boiler adjusts its flow temperature
automatically.
The various corresponding parameters should therefore be set (see
adjustments menu).
To activate the function, press the a
Example 1:
single zone system (high-temperature) with on/off room
thermostat:
In this case the following parameters must be set:
4 21 - Activation of temperature adjustment using sensors
- Select 1 = Basic temperature adjustment
2 44 - Boost Time (optional)
The wait time for the flow temperature increase in steps of
4°C may be set. The value varies according to the type of
system and installation.
If the Boost Time value = 00 the function is not activated.
Example 2:
single zone system (high-temperature) with on/off room
thermostat + outdoor sensor:
In this case the following parameters must be set:
4 21 - Activation of temperature adjustment using sensors
- Select 3 = outdoor sensor only
4 22 - Temperature adjustment curve selection
- Select the relevant curve according to the type of system,
installation, heat insulation used in the building, etc (see
pae 45).
4 23 - Perform a parallel curve shift if necessary, increasing or
decreasing the set-point temperature (this may also be
modified by the user, using the heating temperature
adjustment knob, which, with the Auto function activated,
is used to shift the curve in a parallel manner).
NOTE: Two zone temperature management is not suitable for use
with Y Plan systems.
NOTE: Where an outdoor sensor is connected and the system is
supplying stored domestic hot water and a central heating
circuit, each circuit must be separately connected to the PCB
using the 'RT' and 'Cyl' connections.
This is to ensure a correct flow temperature to the stored hot water
in the summer.
For further information please contact the Technical Help Desk on
0870 241 8180
button.
uto
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