Auto Function - Ariston CLAS HE R 12 Installation And Servicing Instructions

commissioning

AUTO function

The AUTO function determines the best power
output and flow temperature for the heating
system by continually monitoring demand. It
uses advanced modulating technology to clo-
sely 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 enhan-
ce 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 1 - Activation of temperature adjustment
using sensors
- Select 1 = Basic temperature
adjustment
 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.
40
Example 2:
single zone system (high-temperature) with
on/off room thermostat + outdoor sensor:
In this case the following parameters must be
set:
4 1 - Activation of temperature adjustment
4  - Temperature adjustment curve
4 3 - Perform a parallel curve shift if
button.
uto
NOTE: Two zone temperature management is
NOTE: Where an outdoor sensor is connected
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 41 8180
using sensors
- Select 3 = outdoor sensor only
selection
- Select the relevant curve according
to the type of system, installation, heat
insulation used in the building, etc
(see pae 45).
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).
not suitable for use with Y Plan systems.
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.