Potterton eurocondense four 125 kw Installation, Operation And Maintanance Manual page 98

9 Settings
98
Output at pump speed min (2334) and Output at pump speed
max (2335)
If the option burner output is selected under prog. no. 2320, the boiler
pump is operated up to the set burner output under prog. no line 2334 to
minimum pump speed. From the burner output set under prog. no. 2335
the boiler pump is operated on maximum pump speed. If the burner output
lies between these two values, the pump speed for the boiler pump is giv­
en by linear conversion.
Fan output heating max (2441),Fan output full charging max
(2442) andFan output DHW max (2444)
Prog.no. 2441: With this parameter the maximum boiler capacity can be
limited in heating mode.
Prog.no. 2442: With this parameter the maximum boiler capacity can be
limited in full charging mode for stratification cylinders.
Prog.no. 2444: With this parameter the maximum boiler capacity for the
DHW mode can be restricted.
Note
These are calculated values. The actual output must be calculated
using a gas meter, for example.
Fan shutdown heating mode (2445)
This function is used for switching off the supply voltage for the fan. The
supply voltage for the fan is released as soon as the fan PWM actuation is
active or a DHW request exists. The switch off is delayed following PWM
actuation or discontinuation of the DHW request. The duration of the
switch-off delay can be set with the fan switch-off delay function (prog.no.
2446). During a DHW request the voltage supply for the fan still remains
released even if the PWM actuation is not active.
Fan shutdown delay (2446)
If no heating requirement exists the voltage supply of the fan is switched
off. Here, the time during which the fan is still supplied with voltage is set.
Controller delay (2450)
The controller delay is used for a stabilisation of the combustion condi­
tions, especially after a cold start. After release of the firing automation by
the controller this remains on the set output for a specified time. Modula­
tion is only released after this time has elapsed.
Prog. no. 2450 is used to set the operating mode at which the controller
delay is active.
Controller delay fan output (2452)
Boiler capacity which is used during the duration of the control delay.
Note
For the calculated value see prog-no. 2444.
Controller delay duration (2453)
Duration of the control delay. The time duration starts as soon as a posi­
tive flame is detected after ignition.
Switching diff on CHs (2454), Switching diff off min CHs
(2455), Switching diff off max CHs (2456), (2460), Switching diff on
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