Ariston CLAS X User Manual

Training manual CLAS X
Pag. 17 di 69
NORMAL BOILER OPERATION
FLAME
MODULATION
Modulation occurs between the value of the
sanitary maximum power (set on the gas
valve) and the value of the minimum power
(also set on the gas valve).
The burner runs until the scale prevention
temperature is reached. The temperature is
checked by the return probe NTC2.
Performed from the flow and return NTC. If
the temperature rise 102°C a lock out occurs,
indicated on the display with 1 01.
Overheat control
To reduce the formation of scale in the
secondary exchanger.
During the D.H.W. mode the switch off and
switch on of the burner depends on the
following values of temperature:
T set
Antilime
temp.
limit
RE-
START
NTC1
(delivery
probe)
Not
influent.
85°C
81°C
NTC2
(return
probe)
> 52°C
65°C
64°C
<52°C
62°C
61°C
SCALE
PREVENTION
temperature
N.B.: The sanitary switch-off logic could be changed by the parameter 2 53:
– 0 : Anti-scale (62 o 65°C)  default
– 1 : Set-point + 4°C

Ariston CLAS X Specifications

General

Brand	Ariston
Model	CLAS X
Category	Boiler
Language	English