Potterton eurocondense four 125 kw, Installation, Operation And Maintanance Manual, Page: 103 / 148

Antifreeze (3880)
Information of the antifreeze used.
Antifreeze concentration (3881)
Input of antifreeze concentration for usage measurement of solar energy.
Pump capacity (3884)
Input of the flow of the installed pump for calculation of the brought in vol­
ume for usage measurement.
Pulse unit yield (3887)
Defines the flow per pulse for the Hx input. The Hx input must be config­
ured to pulse count for this.
9.2.14 Solid fuel boiler
Locks other heat sources (4102)
If the solid fuel boiler is activated, other heat generators, e.g. oil./gas boil­
ers, are blocked as soon as an increase in the boiler temperature is estab­
lished that indicates that the comparative temperature has been exceeded
(prog. no. 4133).
Setpoint min (4110)
The boiler pump is only put into operation if the boiler temperature has
reached the minimum setpoint set here in addition to the necessary tem­
perature difference.
Temp diff on (4130), Temp diff off (4131) and Comparative
temp (4133)
1 / 0 On / off boiler pump
Bx Comparative actual temperature
T1 Temp diff on
T0 Temp diff off
TKx Boiler temperature
TS Storage temperature
t Time
A sufficiently large temperature difference is necessary between the boiler
temperature and the comparative temperature for start-up of the pump.
To maintain the comparative temperature, the following settings are avail­
able under prog. no. 4133:
Hot water sensor B3 / Hot water sensor B31: The comparative tempera­
ture is supplied by the DHW sensor B3/B31.
Buffer sensor B4 / Buffer sensor B41: The comparative temperature is
supplied by the buffer storage tank sensor B4/B41.
Flow temp setpoint: The flow temperature setpoint is used as compara­
tive temperature.
Setpoint min: The value set in prog.no. 4110 is used as comparative
temperature.
Pump overrun time (4140)
Setting pump after-run time.
9.2.15 Buffer storage tank
Auto generation lock (4720)
The hydraulic separation of heat generator and buffer storage tank is ach­
ieved by the automatic heat generator lock. The heat generator is only put
into operation if the buffer can no longer cover the current heat demand.
The following settings are possible:
None: The automatic heat generator lock is deactivated.
With B4: The automatic heat generator lock is triggered by the buffer
cylinder B4.
With B4 and B42/B41: The automatic heat generator lock is triggered by
the buffer cylinders B4 and B41/B42.
Fig.40 Storage tank charging
1
0
TKx
T1
T0
TS
Bx
T
t
RA-0000081
9 Settings
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