Baxi LUNA HT 1.280, Installation, Operation And Maintenance Manual

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Temperature difference (4130 - 4133)
Temp diff on/off
(4130, 4131)
Comparative temp
(4133)
A sufficiently large temperature difference is necessary between the boiler tem-
perature and the comparative temperature for start-up of the pump.
Fig. 25: Storage tank charging
TBx
Temp diff on
Temp diff off
On
Off
TSt
Bx
TBx
Bx
ON/OFF
Boiler temp
Comparative actual temperature
ON/OFF Boiler pump
To maintain the comparative temperature, the following settings are available
under prog. no. 4133:
DHW sensor B3/B31: The comparative temperature is supplied by the DHW sen-
sor B3/B31
Storage tank sensor B4/B41: The comparative temperature is supplied by the buf-
fer storage tank sensor B3/B31
Flow temp setpoint: The flow temperature setpoint is used as comparative tem-
perature.
Setpoint min The value set in prog.no. 4110 is used as comparative temperature.
Pump after-run time (4140)
Pump after-run time
(4140)
Setting pump after-run time.
Buffer storage
Auto generation lock
(4720)
The hydraulic separation of heat source and buffer storage tanks achieved by the
automatic heat generation lock. The heating source will only be started if the buf-
fer storage tank cannot cover the actual heat request. The following settings are
possible:
- None : the automatic heat generation lock is de-activated.
- with B4 : the automatic heat generation lock will be triggered by the buffer sto-
rage tank B4
- with B4 and B42/B41 : the automatic heat generation lock will be triggered by
the buffer storage tanks B4 and B41/B42.
Auto heat gen lock SD
(4721)
The heat source will be locked if the temperature in the buffer storage tank is hig-
her than the boiler s auto heat generation lock SD.
Programming
98 358 436 08.10