Ariston CLAS EVO SYSTEM 24 CF - Water Flow Check

Training manual CLAS X
Pag. 21 di 69
3.4 “ WATER FLOW CHECK ”
Check
When
What happens
Gradient Tdel > 7°C/sec
(checked every 100ms)
Check always with the
flame on, except during the
first 4 seconds after flame
detection.
1. Immediate safety shutdown 1 P1:
- 10sec of post-circulation
- 10 sec of post-ventilation
The boiler restarts after 10sec.
2. If the error occurs other 2 times within the
following 4 minutes it will be shutdown 1 03
:
- 20sec of post ventilation
- 1min of post circulation.
Gradient Tdel > 20°C/sec
or
Gradient Tret > 20°C/sec
(checked every 100ms)
Check always with the
flame on, and up to 7 sec
after each turn off for
temperature set or safety
shutdown.
1. Shutdown 1 04:
- 20sec of post ventilation
- 1min of post-circulation.
Tdel – Tret > 55°C
Check always with the
flame on, and up to 7 sec
after each turn off for
temperature set or safety
shutdown.
1. Immediate safety shutdown 1 P2:
- 10sec of post-circulation;
- 10sec of post ventilation.
After 10sec the boiler restarts.
2. If within 4 minutes from the first safety
shutdown the defect occurs again there will
be a safety shutdown 1 P2 :
- 10sec of post-circulation;
- 10sec of post ventilation.
After 10sec the boiler restarts but the timer
is zeroed.
3. If within 4 minutes from the first safety
shutdown the defect occurs again it will be
shutdown 1 05 :
- 20sec of post ventilation
- 1min of post circulation.
Tret > Tdel + 10°C
Check always with the
flame on.
1. If the defect occurs for 20 continuous
seconds there will be a safety shutdown 1
P3 :
- 10sec of post-circulation;
- 10sec of post ventilation.
After 10sec the boiler restarts.
2. If the defect occurs for 20 continuous
seconds another 2 times within 4 minutes it
will shutdown 1 06 :
- 20sec of post ventilation;
- 1min of post circulation.
Tret > Tdel + 30°C
Check always with the
flame on.
1. Shutdown 1 07:
20sec of post ventilation;
- 1min of post circulation