Wilo Comfort-Vario COR-1***-GE Series, Инструкция по установке и эксплуатации

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English
14 WILO SE 11/2020
6.3 Function of the system
Systems from the Wilo-SiBoost Smart 1 and
Wilo-Comfort-Vario COR-1 and COR/T-1 series
are fitted with a non self-priming, horizontal or
vertical high-pressure multistage centrifugal
pump with a three-phase current motor (17) and
an integrated frequency converter (15) as
standard. The pump is supplied with water via the
inlet connection (4).
For suction mode (SiBoost Smart 1 and COR-1…)
from lower-lying tanks, a separate, vacuum-proof
and pressure-resistant suction line with a foot
valve should be installed. It must be positioned at
a constant upward inclination from the tank to the
pump connection.
The pump increases the pressure and pumps the
water to the consumer through the pressure pipe
(5). To do this, it is switched on and off and
controlled according to the pressure. One or two
pressure sensors (12-1 and 12-2) are intended to
monitor the pressure depending on the type of
system (Fig. 2a and 2b). The pressure sensor or
sensors continuously measure(s) the actual
pressure value, convert(s) it into an analogue
current signal and transmit(s) it to the frequency
converter (15) of the pump (or if available the
control device (2)). Depending on the demand and
the control mode, the frequency converter (or the
control device) switches the pump on or off or
changes the speed of the pump until the set
control parameters are reached. A more precise
description of the control mode, control process
and setting options can be found in the
installation and operating instructions for the
pump and the control device.
SiBoost Smart 1 HELIX VE…/MVISE... and
COR-1 MVIE…GE type systems with frequency
control on the pump and an installed pressure
sensor on the inlet side (pump housing or suction
line) can operate in p-v mode. For this purpose,
special settings are possible and required on the
frequency converter of the pump.
A more precise description of the control method
and the setting possibilities can be found in
the “p-v mode” section and in the separate
documentation for the pump/frequency
converter!
The diaphragm pressure vessel installed (9) (total
capacity of approx. 8 litres) exercises a certain
buffer effect on the pressure sensor and prevents
oscillation of the control when switching the
pump on and off. However, it also guarantees low
water extraction (e.g. due to tiny leakages) from
the available storage volume without switching on
the pump. This reduces the switching frequency
and stabilises the operating state of the system.
CAUTION! Risk of damage!
To protect the mechanical seal and plain
bearings, do not allow the pumps to run dry. Dry
running can lead to the pump developing
leakages!
On SiBoost Smart 1 HELIX VE…/MVISE... and
COR-1 MVIE…GE type systems, the supply
pressure is continuously monitored by the
pressure sensor on the inlet side and transmitted
to the frequency converter as a current signal. If
the supply pressure is too low, the system detects
a fault and the pump is stopped.
On COR-1 MHIE…GE and SiBoost Smart 1
HELIX VE…EM2 type systems, a low-water
protection device (WMS) (14) (Fig. 5a and 5b) is
provided as an accessory for direct connection to
the public water supply network. It monitors the
available supply pressure and sends a switching
signal which is processed by the frequency
converter and control device. The WMS kit is
installed on the pump's drainage opening (WMS
connection kit (Fig. 5a, 14b) from the accessories
range required) or at an installation point to be
provided in the inlet pipe.
In the case of an indirect connection (system
separation by non-pressurised break tank),
provide a level-dependent signal transmitter
installed in the break tank as a dry-running
protection device. When using a Wilo break tank, a
float switch (Fig. 10b item 52) is included in the
scope of delivery.
COR/T-1 series systems that are fitted with an
unpressurised break tank for system separation
also have a float switch (Fig. 1e item 52), which is
installed as a low-water signal transmitter in the
tank.
For tanks provided by the customer, you can
find various signal transmitters for subsequent
installation in the Wilo range (e.g. WA65 float
switch or low-water electrodes with level relay).
WARNING! Health hazard!
Use materials that do not adversely affect the
quality of the water for drinking water systems!
An additional main switch is optionally provided,
which can be retrofitted on all COR-1... GE and
SiBoost Smart 1... series systems (Fig. 1a-1h and
Fig. 8 item 16). It is used to disconnect the mains
supply for maintenance and repair work on the
system.
6.3.1 P-v mode
“p-v control” operating mode
Alongside the operating modes “Speed control”;
“Constant pressure: p-c”; “Constant differential
pressure Δp-c”; “PID control” and “Variable
differential pressure Δp-v” described in more
detail in the installation and operating instructions
for the pump, a control mode “Variable pressure
p-v” (hereinafter referred to as just p-v control),
described in more detail below, can be set via the
user interface of the frequency converter in the
menu (see Section 6.3.2).