Ariston CLAS - Secondary Exchanger; Antiscale Limit Temperature

Training manual CLAS
Pag. 28 di 71
4.4 SECONDARY EXCHANGER
The secondary exchanger is fixed to the hydraulic unit with two screws.
The two points where the screws are to be fixed are asymmetric with the body of the exchanger so that it can
be assembled only in the proper position.
4.4.1 Antiscale limit temperature
Reduces the formation of scale in the
secondary exchanger. During SANITARY
MODE operation the burner turn off and
restart depends on the temperature values
detected by probes NTC1 and NTCs
indicated here on the right.
T set
Antiscale limit
temp.
START
NTC1
(delivery probe)
Non
influente
85°C
81°C
NTCs
(sanitary probe)
NTC2
(return probe from
01/08/2008)
> 52°C
65°C
64°C
<52°C
62°C
61°C
HEAT EXCHANGER
Hot water from the main exchanger, flows
into A, transferring its heat and flows out
through B
The cold water from the domestic hot water
mains, passes through the domestic
proportional flow meter (thus starting up the
boiler in domestic hot water mode) flows into
C, heat up and flows out through D, ready for
use in the distribution network.
Exchanger with 16 plates