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WILO_IOM_WIBOOSTER_07012019
6.2.4
Dry-running protection system and protection against
low water
• Every Wilo-WiBooster pressure booster system is
supplied with a suction transducer that has a .4%
accuracy across its full span (0-150 PSI) which equates
to a +/- 0.6 PSI deviation.
•
To fit an alternate, dry-running, switch protection
system (
not common
and provided by others):
• It is very rare for a problem to arise using the Wilo-
WiBooster supplied suction transducer when a
storage tank is used. Regardless of this rarity, issues
with low water conditions when utilizing a storage
tank can occur and a digital switch can be used in
lieu of the transducer in the form of a tank float or
low water probe.
• Please refer to the PLC operation, described later
in this document for detailed instructions to use a
digital switch in lieu of the Wilo-supplied suction
transducer.
6.2.5
Diaphragm pressure vessel (optional accessory)
For transport reasons, if the NSF-61 hydropeumatic has
been purchased as an accessory for the Wilo-WiBooster,
it will not be attached upon delivery; it will be separately
packed. Before commissioning, this must be mounted
on the ¾” shutoff valve (see Fig. 5e) and charged to the
appropriate pressure at the jobsite with nitrogen (See below
– 6.2.5.1)
6.2.5.1
Diaphragm pressure vessel recommended charge
The hyropneumatic tank should be installed on the
discharge manifold, adjacent to the pressure transducer,
and it should be charged with pressure to equal 70% of
the system constant pressure setpoint. For example, if the
constant pressure setpoint is 80 PSI, the tank should be
charged to 56 PSI (80 x 70%).
6.3
Electrical connection
DANGER!
Risk of fatal injury! The electrical connection must be
made in accordance with the local and national electrical
code regulations by a qualified electrician!
The Wilo-WiBooster can be equipped with different
variances of current and voltage. To make the electrical
connection, the corresponding installation and operating
instructions and attached electrical circuit diagrams must be
observed. General points to be considered are listed below:
• Every Wilo-WiBooster control panel is supplied with a
current overload sized for each pump motor amperage
(circuit breakers).
• The type of current and voltage of the main connection
must comply with the details on the wiring diagram of
the control panel.
• The electrical connection line must be adequately sized
according to the total power of the Wilo-WiBooster.
• External protection must be provided according to local
and national electrical codes.
• As a protective measure, the Wilo-WiBooster must be
wired to ground in accordance to local and national
electrical codes. The connections intended for this
purpose are identified accordingly (see wiring diagram).
• Further measures are referenced in the wiring diagram
of the control panel.
7
Commissioning/decommissioning
We recommend that Wilo’s after-sales service commission
the system. Contact your dealer, the nearest Wilo
representative or our service department directly for details.
7.1
General preparations and checking
WARNING!
Make sure the system is de-engergized and wait 5
minutes to allow any capacitance voltage to discharge.
Before energizing the system for the first time:
• Check that onsite wiring and grounding of the electrical
panel is correct.
• Check that the pipe joints are stress-free.
• Fill the system and check visually for leakage.
•
Open the pump vent screws and slowly fill the pumps
with water so that the air can escape.
CAUTION!
Risk of damage! Do not allow the pump to run dry. Dry-
running destroys the axial face seal of the Scot Pump.
In suction mode (e.g. negative level difference between
storage tank and pumps), the pump and the suction line
must be filled via the opening in the vent screw (use a
funnel as required).
7.2
Electrical layout, sequence of operations and start-up
procedure
DANGER!
Risk of fatal injury! Always refer to the wiring diagram
of the onsite Wilo-WiBooster ONLY! References and
examples of wiring diagrams in this document are not
official wiring diagrams for the onsite unit in the panel.
7.2.1
Electrical layout - panel overview
Every Wilo-WiBooster panel shall meet the requirements
of UL508A standards for Industrial Control equipment.
Standard panel shall be rated as a NEMA 12 enclosure with
a fan; CFM rated for heat sink requirements of the variable
frequency drives (VFDs). Three phase, 208-230/460
voltage panels shall either be equipped and mounted with
Danfoss FC-51 micro VFDs (1-10 horse power) or Danfoss
FC-101 VFDs (10-20 horse power) – no keypad per pump.
Three Phase, 575 voltage panels shall be equipped and
mounted with Danfoss FC-101 drives – no keypad per
pump. VFD’s shall be programed to the WIlo-WiBooster
needed parameters prior to shipment. The Danfoss variable
speed drives will be mounted inside the panel enclosure
and supplied with a NEMA 1 enclosure rating. The VFD will
utilize the MODbus protocol to report faults and energy
usage in kWh to the programmable logic controller. The
VFD shall provide visual indication that requires no external
control devices. The panel shall have labeled wires and
terminal block for easy reference to the wiring diagram.
The panel shall contain motor protector circuits, for each
pump supplied, sized for motor amperage. Through-the-
door-disconnect with selector handle and lockout will be
provided with the panel. The panel will also be provided with
alarm with silencing button.
