sauter equitherm EQJW245, Руководство по эксплуатации

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EQJW245
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Technical data
The weekly switching programme can be used to increase the domestic water
temperature at regular intervals. If a higher domestic water temperature is
required for a longer period independently of the switching programme, a
separate switch is available.
T
RF1,2
can be monitored for the maximum actual values. If the temperature
exceeds a limit for the actual value of T
RF1,2,
the associated setpoint for T
F1,2
is
reduced. For the heating circuits, a limitation characteristic dependent on the
outside temperature (fi xed value-sequence-fi xed value) can be defi ned, and a
fi xed limit value can be defi ned for domestic water preparation. The limitation
function, the limit value and the infl uence on the setpoint of T
F
are parameterised
at SERVice level.
The maximum fl ow or the maximum power can be limited. Limit values can be
specifi ed for the heating, domestic water preparation and the combination of
heating and domestic water preparation. If the limit value is exceeded the fl ow
temperature is reduced. The limit values and intervention intensity when the limit
is exceeded are parameterised in the SERVice level.
The minimum fl ow can be limited. To do so, you can use a pulse signal from a
fl ow measuring device or the signal from the auxiliary contacts of a control unit.
When the function is activated, the valve on the primary side closes and does not
open again until the setpoint for T
F
is 5K higher than the actual value.
The relays for the various outputs can be activated separately in manual mode.
The setting for this is menu-guided if manual mode has been enabled, which is
done at SERVice level. The factory setting for manual mode is ‘not enabled’.
Safety functions are not in operation in manual mode, and limits do not apply.
With the automatic cut-off facility, the heating controller saves energy without any
loss of comfort levels, wherever possible. There are several ways of having a
heating circuit switched off by the heating controller:
The current mode for the heating circuit is OFF •
Summer/winter heating limit is OFF •
T •
A
≥
T
Rs
(when T
A
≤
T
Rs
– 1K, controller switches back on).
The optimisation function causes the heating to be switched on/off at the optimum
time in automatic mode when changing from reduced or back-up mode into
normal mode. The switching times are chosen so that the room temperature‘s
setpoint is reached at the time that is set in the switching programme. At the
same time, energy is saved by switching on as late as possible and off as early
as possible.
EN 1264 Part 4 describes how cement fl oors must be treated before fl oor
coverings are laid with functional heating. Firstly, a fl ow temperature of 25°C must
be maintained over 3 days for this purpose. After this, the maximum fl ow
Legionella function
Limitation of return
temperature
Flow and power
limitation
Minimum fl ow
limitation
Manual mode
Automatic cut-off
Optimisation of
switching times
Screed curing