Dungs MPA 5111, Руководство пользователя

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Printed in German
y • Edition 02.14 • Nr
. 254 722
7.6 State description
MPA 5111
State xx Designation Description
24 Standard mode In this mode, the MPA can be modulated via several types
(see P70 to P76, especially P72).
A voluntary switch-off after a defined time can be activated
(P70). If this time is set to a maximum of 23 hours and 59
minutes, the MPA is in the intermittent mode.
Continuous operation (≥ 24 h) is only possible using acon-
tinuous operation stick, see section 8.11
25 Changeover after regular switch-
off
This state can be used to define the modulation degree
after a regular switch-off (see also P80 and P81).
Possible application: In order to avoid a switch-off when
the system is under full load, this state can be used to
reduce (or increase) the power to a defined value.
26 VPS B - Decision In this state the decision is made if a valve test must be
carried out. See Operation with valve testing system.
This state lasts only 1/16 of a second.
27 VPS B - Empty the area between
the valves
V2 remains open (P42) in order to empty the area between
the valves and to compensate the possibly existing gas
pressure.
28 VPS B - Test time V1 In the defined test time (P43), no gas pressure may be built
up in the area between the valves otherwise the valve 1 is
considered as "leaking".
29 VPS B - Fill
the area between the valves
V1 is opened (P44) in order to fill the area between the
valves with gas pressure.
30 VPS B - Gas pressure detection This states lasts only one-eighth of a second and serves
for the monitoring of the gas pressure detector GDWVPS.
31 VPS B - Test time V2 The gas pressure may not drop within the defined test time
(P45) otherwise the valve 2 is considered as "leaking".
Note: When the MPA with ignition gas flame is used, also
the additional valve (= main gas flame) may be leaky al-
though the error message refers to V2.
32 Follow-up time During this time (P82), a flame signal may be present from
the previous mode caused by e.g. existing residual gas in
the combustion chamber. The external light monitoring is
only started in the following state.
33 Post-aeration In this state, the post-aeration of the combustion chamber
is carried out (P83).
In this state, no flame must be detected. Since the dura-
tion of the state with the setting P83=0 is only a few milli-
seconds, the MPA reacts also to external light if "no" post-
aeration is configured.
34 Restart protection In this state, the temperature controller is not evaluated,
that means if another heat request is sent or activated, the
automatic is not restarted.
35 Lack of gas GDWMIN If the input GDWMIN of the automatic system is not closed,
the automatic system waits in this state until the gas pres-
sure is detected.