Potterton EC three 125 Installation, Operation And Maintenance Manual page 94

Programming
Setpoint manual control
(2214)
Burner running time min
(2241)
Burner off time min
(2243)
SD burner off time
(2245)
Pump overrun time
(2250)
Pump overr time after DHW
(2253)
Boiler pump at heat genera-
tion lock
(2301)
Impact heat generation lock
(2305)
Temp differential max
(2316)
Temp differential nominal
(2317)
94
The Temperature to which the boiler will be contolled in manual control mode
(also see prog. no. 7140).
Here the time span after start up of the burner is set in which the switch off dif-
ference is increased by 50 %. However, this setting does not guarantee that the
burner always remains in operation for the set time span.
The boiler minimum pause time only takes effect between heating requirements
coming following in sequence. The boiler minimum pause time blocks the boiler
for a set time.
When exceeding this switching difference, the burner pausing time mini-
mum(prog.-no. 2243) will be interrupted. The boiler starts despite pausing time.
The delay times of the pumps are controlled according to heating mode or DHW
mode.
Stop of boiler pump in case of activated manual heat generation lock (e.g. via H1).
- Off: Switching off not activated
- On: Switching off activated
With these parameter it can be set whether the heat generation lock should be
effective only for heating requests or also for DHW requests.
- Heating mode only: Only the heating request is locked. DHW requests will con-
tinue to be operated.
- Heating and DHW mode: All heating and DHW requests will be locked.
The limit of the boiler stroke is only possible if a valid value of the boiler return
temperature is available.
Caution! The limit of the boiler stroke is only performed if a modulating heat cir-
cuit pump is configured, i.e. if Prog. no. 6085 (PWM-output P1) is assigned to a
heating circuit pump.
The expansion between boiler flow temperature and boiler return temperature is
called the temperature rise.
For operation with a modulating pump, the temperature rise is limited with this
parameter.
Condensing gas boiler Eurocondense three125-300 kW 7308536-02 06.13