English
Installation and operating instructions Wilo-CC-System
25
• Systems without frequency converter:
If the base load pump fails, this pump is switched
off and it's function is transferred to a peak load
pump. This Pump is administrated by the control
system then as base load pump.
If a peak load pump fails, this pump is always
switched off and a other peakload pump is
switched on (if theres no other pump available,
the reservepump is beeing activated).
Lack of water
Supervised from a NC contact of a pre-pressure
switch, reserve tank float switch or an optional
niveau relay the pumps can be switched off with
an adjustable time delay (menue 3.3.2.1). If the
contact closes again during the delay time, no
action takes place.
Otherwise the automatic re-start of the system
after a shut down caused by a lack of water signal
is then following 10 s after closing the signal con-
tact.
Supervision of minimal and maximal pressure
In menue 3.3.2.3 the limits for a safe and properly
system operation can be adjusted. An overrun of
the maximal pressure limit leads to a immediately
shut down of all pumps. If then pressure decreases
to the switch on level again, normal operation is
released. If there 3 shutdowns due to maximum
pressure occuring within 24 hours, collective fail-
ure signal " SSM" will be activated.
An undershooting of the minimal pressure limit
generates immediately a collective failure signal
"SSM". The pumps will not be switched off.
For the supervision of maximal- and minimal pres-
sures in the above mentioned menue a hysteresis
for the pressure value and a time delay for the
triggering of the failure mode processing can be
adjusted. For this short time pressure peaks and
breaks can be blinded out.
External off
The control system can be deactivated by an
external NC contact. This function has priority
befor all others! In this mode the pump kick is acti-
vated, too.
Operation with failured sensor
In menue 3.3.2.3 the limits for a safe and properly
system operation can be adjusted. An overrun of
the maximal pressure limit leads to a immediately
shut down of all pumps. If then pressure decreases
to the switch on level again, normal operation is
released. If there 3 shutdowns due to maximum
pressure occuring within 24 hours, collective fail-
ure signal " SSM" will be activated.
An undershooting of the minimal pressure limit
generates immediately a collective failure signal
"SSM". The pumps will not be switched off.
For the supervision of maximal- and minimal pres-
sures in the above mentioned menue a hysteresis
for the pressure value and a time delay for the
triggering of the failure mode processing can be
adjusted. For this short time pressure peaks and
breaks can be blinded out.
Emergency run
In the case that the controller itself fails, every
single pump can be switched via the Hand-0-
Automatic switch (fig. 1.1/1.2; Pos. 8). This func-
tion has priority before the automatic pump
switching by the controller.
6.1.4 Motor protection
Overtemperature protection
Motors with winding protection contact signals
the controller an excessive winding temperature
by opening a thermal contact. The electrical con-
nection of this contact is to execute referring to
the wiring scheme.
For motors with a temperature depending resistor
(PTC) for the overtemperature protection, a
optional relay is requested for the signal process-
ing.
Overcurrent protection
Motors connected to switchboxes up to 4,0 kW
are protected by motor protection switches with
thermal and electromagnetic tripping. The trip
current must be adjusted dircetly on this switches.
Motors connected to switchboxes from 5,5 kW on
are protected by thermal overload relays. These
relays are directly mounted on the motor contac-
tors. The trip current must be adjusted directly on
this relays and is in star/delta start 0,58 * I
N
.
All motor protection functions protect the motor
in operation on frequency converter and on line.
Pump failures leads directly to the switching off
command for the pump and generates a collective
fault signal. After rectification of the fault's causal
a acknowledgement is requested befor restarting
the pump.
All motorprotection functions are active in the
emergency mode, too.
6.2
Operation of control system
6.2.1 Operating panel functions
•
Main switch
On/Off
• The Touchdisplay (graphic operation, 128x64
Pixel) displays the operation modes of pumps,
controller and frequency converter. Furthermore
all parameters are adjusted directly on the display.
The panel's backlight chnages ist colour according
to the operating state: GREEN - System o.k.; RED
- Fault; ORANGE - Fault acknowledged but not
rectified.
The operating panel functions are displayed refer-
ring to context on the touchpanel. Beside this
cleartexts graphic symbols as shown below being
applied:
Содержание Wilo-CC-System
Страница 2: ...Fig 1 1 Fig 1 2...
Страница 3: ...Fig 2 Fig 3 Fig 4...
