Wilo COR-1HELIX VE5203/3/VR, Инструкция по установке и эксплуатации

Страница: 27 / 35

English
32 WILO SE 07/2010
Use of pressure switch type CS.... (Fig. 3b)
• Set the hand switch (item 28 in Fig. 3b) on the
pressure switch to “0”.
• Open the pressure switch cover.
• Set the deactivation pressure using the central
screw (-P+, item 19 in Fig. 3b). The pressure can
be read in bar on the dial (on the side). Factory set-
ting is as shown on the attached acceptance test
certificate.
• Open the gate valve on the discharge side and one
tap.
• Set the hand switch (28) on the pressure switch to
“AUT”.
• Slowly close the tap.
• Monitor the deactivation point on the pressure
gauge and correct it if necessary by turning the
adjusting screw (-P+, item 19 in Fig. 3b).
• Slowly open the tap.
• Set the start-up pressure using the screw (+p-,
item 20 in Fig. 3b). The factory setting for the
pressure difference p is about 1.0 bar.
• Close the tap again.
• Set the hand switch on the pressure switch to “0”.
• Put the pressure switch cover back in place.
• Set the hand switch on the pressure switch to
“AUT” (automatic mode).
The pressure switch of type CS is designed as a
three-pole normally-closed contact (i.e. contacts
close when pressure drops and open when the tar-
get pressure is reached). This pressure switch only
allows the system to be operated in pressure
boosting mode (see installation and operating
instructions for ER switchgear). If the application
absolutely requires the fire extinguishing system
mode to be possible, the pressure switch must be
replaced, because that mode requires the contact
to open when pressure drops.
8.2 Protection against low water level (WMS)
The protection against low water level (WMS)
(Fig. 6a and 6b) for monitoring the supply pressure
is permanently factory-set to the thresholds 1 bar
(deactivates if pressure below this value) and
1.3 bar (starts up again when pressure goes above
this value).
8.3 Commissioning the system
After all the preparations and checks according to
section 8.1 have been made, the system should be
switched on at the main switch on the control
device and the control should be set to automatic
mode. (Systems of type COR-1...GE have a sepa-
rate main switch.) The pressure control system
switches the pump on until the consumer pipe-
lines are filled with water and the set pressure has
built up.
CAUTION!
If the installation has not been flushed up to
now, flush it through well at this point at the lat-
est (see section 7.2.3).
8.4 Decommissioning the system
If the system is decommissioned for maintenance,
repair or other measures, proceed as follows:
• Switch off the voltage supply and secure to pre-
vent it from being switched on again without
authorisation
• Close the stop valves upstream and downstream
of the system
• Shut off the diaphragm pressure vessel at the
throughflow fitting and drain it
• Drain the system completely if necessary