Controller delay (2450)
The controller delay is used for a stabilisation of the combustion
conditions, especially after a cold start. After release of the firing
automation by the controller this remains on the set output for a specified
time. Modulation 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.
Controller delay duration (2453)
Duration of the control delay. The time duration starts as soon as a
positive flame is detected after ignition.
Switching diff on HCs (2454), Switching diff off min HCs
(2455), Switching diff off max HCs (2456), (2460), Switching diff on
DHW (2461) and Switching diff off min DHW (2462)Switching diff
off max DHW
Sd Switching difference off
Sd1 Switching diff off max HCs, Switching diff off max DHW
Sd2 Switching diff off min HCs, Switching diff off min DHW
Sd3 Switching diff on HCs, Switching diff on DHW
t Time
Ti Actual temperature
To avoid unnecessary switch off during transient effects the switch-off
difference adapts dynamically depending on the temperature profile (see
fig.).
Delay heat req special op (2470)
The heat request during special operation (chimney-sweep function,
controller stop, manual operation) is sent to the burner delayed by the time
set here. In this way slowly opening mixers can already start up before the
burner goes into operation. Thus a boiler temperature that is too high can
be prevented.
Static press superv sh'down (2480)
This parameter controls behaviour when the water pressure is outside the
permissible range:
Lockout position: The boiler is locked.
Start prevention: The boiler start-up is prevented.
Gas energy metering (2550)
This parameter is used to switch gas energy metering on or off. The
counter values are not deleted during this process.
Important
Charging priorityAbsolute If the charging priority is not “Absolute”
and there is a requirement for heating operation at the same time
as domestic water charging, the gas energy is only taken into
consideration in the meter for the heating circuit.
Gas energy metering readj (2551)
The gradient of the linear approximation function is adapted here.
Value < 1: Leads to lower gas energy metering.
Value > 1: Leads to increased gas energy metering.
A value of 1 means there is no change compared to the approximation
function stored.
Fig.32
Switching difference
t
Sd
Sd1
Sd2
Sd3
RA-0000079
Ti
Ti
9 Settings
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