Ariston CLAS - Water Flow Check

Training manual CLAS
Pag. 18 di 71
3.4 “WATER FLOW CHECK”
Check
When
What happens
Gradient Tman > 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 Tman > 20°C/sec
or
Gradient Trit > 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.
Tman – Trit > 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.
Trit > Tman + 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.
Trit > Tman + 30°C
Check always with the
flame on.
1. Shutdown 1 07:
20sec of post ventilation;
- 1min of post circulation