Roca LAURA 20 - Process of Code 22

Yes
Yes
Process of Code 22
CHSPT=Tª required
by user
DHWT>131ºF(64 ºC)
No
CHSPT=122ºF (50 ºC)
Tª required by user displayed.
Code 22 not displayed.
Before 10'
DHWT<131ºF(55 ºC)
No
CHSPT=Tª required
by user
Yes
Before 10’
DHWT>147ºF (64 ºC)
Display: Code 22
Red LED flashing and beep-beep
CHSPT=140ºF (60ºC) and the user
cannot change it
Reset
No
Yes
No
Legend
CHSPT=Central Heating Setpoint Temperature
CHT= Central Heating Temperature
DHWSPT=DHW Setpoint Temperature
DHWT= DHW Temperature
Algorithm conditions
- Thermostat ON
- CH mode enabled
- DHW demand OFF
Automatic RESET conditions
of algorithm (while code 22 is not displayed)
- If there is demand for DHW
- Thermostat OFF
- CH mode OFF
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Laura 20/20F wall-hung waterheaters