Siemens LMU54 Series, Основная документация

Страница: 50 / 171

50/171
Siemens Building Technologies Basic Documentation LMU54... / LMU64... CC1P7494en
HVAC Products 3 Functions 07.11.2002
During the controller delay, the heat output in heating mode is limited to the heating
circuit’s correcting span («LmodTL...PhzMax» or «N_TL...NhzMax»).
The controller delay can also be activated via a flag (parameter «KonfigRg7» flag
«BetrArtRgVerz») in the case of
•
DHW demand (with the exception of instantaneous DHW heaters)
whereby the parameterized output is limited to the possible correcting span of the
respective operating mode.
If shutdown takes place due to a criterion of the electronic SLT - caused for example by
residual heat or a too rapid rise of the boiler temperature - a controller delay will be
activated with the next startup.
That controller delay lasts 30 seconds and is active only in heating mode or in the DHW
modes. During the time the controller delay is active, the following heat output is
delivered, depending on the parameterization.
KonfigRg7 - BetrArtRgVerz = 0: Minimum heat output
KonfigRg7 - BetrArtRgVerz = 1: Heat output «LmodRgVerz», which can be
parameterized
In operating modes «Chimney sweep», «Controller stop», or with the test function, the
controller delay due to an SLT criterion does not exist. But these operating modes can
activate the SLT criterion for the next startup.
Depending on the operating mode, the boiler controller must be loaded with the relevant
setpoints / actual values:
Heating mode DHW storage tank
charging
Instantaneous DHW
heating
Setpoint Tsoll TkSoll TkSoll TempAnfoUfBw
Actual value Tist TkIst TkIst TbwIst1/ TkRuec or TkIst
In heating and DHW storage tank charging mode, the ascertained boiler temperature
setpoint is passed on. In the case of an instantaneous DHW heater, the DHW setpoint is
used. The actual values will be loaded.
With instantaneous DHW heaters, this is dependent on the type of hydraulic system,
water draw or comfort mode and the parameterization (KonfigRg2, DlhKomfReglF).
With fixed controller parameterization, only the relevant controller coefficients and the
respective sampling times are selected here.
Heating mode DHW storage tank
charging
Instantaneous DHW
heating
Controller parameters
Kp, Tn, Tv
KpHz1, TnHz1, TvHz1 KpBw, TnBw, TvBw KpBw, TnBw, TvBw
Sampling time ZabtastK ZabtastK ZabtastDlh
Controller delay due
to SLT criterion
Controller configuration
Transfer of setpoint /
actual value
Determining the controller
coefficients
Parameter selection