Further Operating Modes For Saving Energy; General Functions Of The Pump - Wilo Stratos Notice De Montage Et De Mise En Service

English

6.2.3 Further operating modes for saving energy

• Manual control mode: The speed of the pump is maintained at a constant speed
between n
pressure control at the module.
• If "auto" operating mode is activated, the pump is able to detect minimum
heating output requirements of the system by the prolonged reduction of the
fluid temperature and then switching over to setback operation. If heating out-
put requirements are increased, the unit automatically switches over to control
mode. This setting ensures that the pump's power consumption is reduced to a
minimum, which is the ideal setting in most cases.
CAUTION! Risk of damage to property!
Setback operation may only be enabled if hydraulic balancing of the system
was performed. In the event of non-compliance, insufficiently supplied sys-
tem components may freeze up in the event of frost.
• The "Q-Limit" operating mode can be combined with the other control modes
(Δp-v, Δp-c, Δp-T, controller), which makes it possible to limit the maximum
volume flow to 25% - 90% of Qmax. When the set value is reached, the pump
is controlled on the pump curve along the limit - never beyond.
NOTE: "Q-Limit" can only be set using the Wilo-IR-Stick (accessory).
If "Q-Limit" is used in non-hydraulically balanced systems, partial areas can be
undersupplied. Perform hydraulic balancing.

6.2.4 General functions of the pump

• The pump is equipped with an electronic overload protection function which
switches off the pump in the event of an overload.
• For data storage, the control module is equipped with a non-fading memory. All
settings and data are retained no matter how longer the module is disconnected
from the power supply. When the power supply is re-established, the pump con-
tinues to run with the values set prior to disconnection from the power supply.
• Pump kick: Any pumps switched off via the (ON/OFF) menu, a bus command,
the infrared interface, the Ext.Off control input or 0-10V start running for a
short time every 24 hours to prevent blockages in the event of long standstill
periods. The mains voltage must not be interrupted for this function.If discon-
nection from the mains is planned for a lengthy period, the pump kick must be
applied by the heating/boiler control by switching on the mains voltage briefly.
For this, the pump must be switched on by the control prior to disconnection
from the mains (display → motor/module symbol lights up).
• SSM: The contact of the collective fault signal (potential-free normally closed
contact) can be connected to a building automation system. The internal con-
tact is closed if the pump is without power, if there is no fault or if there is a mal-
function of the control module. The performance of the SSM is described in
Chapters 6.2.5, 10.1 and 10.2.
• For connecting to external monitoring units, the system can be expanded by
retrofitting interface modules for communication. Analogue and digital IF Mod-
ules are available as an option (see catalogue).
60
and n (Fig. 11). Manual control mode deactivates differential
min max
WILO SE 04/2016