Technical Information; Type Key; Technical Data; Delivery - Wilo COF-2 Helix Mode D'emploi

5 Technical information

5.1 Type key

COF-2HELIX606-T-V-CPI
COF COF =
2 2 =
HELIX606 HELIX606 = Pump types
T T =
V V =
B =
CPI CPI =
Nothing = No CPI

5.2 Technical data

• Maximum operating pressure: 16 bar
• Permitted water temperature: 3 °C to 50 °C
• Permitted ambient temperature: 5 °C to 40 °C
• Supply voltage: TRI 400V ±10 %
• Frequency: 50 Hz
Ensure that general installation corresponds to
safety standard NF-C 15-100.
5.3 Scope of delivery
It is crucial that, prior to delivery, you are aware of
all main components that make up the pressure-
boosting system.
See the pressure-boosting system illustration
in Fig. 1:
1. High-pressure vertical multistage centrifugal
pump
2. Baseplate for support and fixation
3. Switchgear and automation control
4. Suction manifold
5. Discharge manifold
6. Pressure sensor
7. Pressure gauge
8. Flow switch
9. Low-water cut-out switch (version using
municipal water supply)
10. Pressure tank (accessory, not supplied as
standard)
11. Bypass pipe (option): Ensures direct water
supply without using pumps when the munic-
ipal water supply pressure is sufficient
NOTICE:
Each pump is equipped with suction-side gate
valves, non-return valves and discharge valves.
Each collector tank is also fitted with a plug.

5.4 Variants

Depending on the installation type, the pressure-
boosting system comes in 2 variants as specified
in the product definition.
Variant 1: Low-water cut-out switch
Installation and operating instructions Wilo-COF-2 Helix
Version
Number of pumps
Power supply voltage
Tri 400 V
Protection against low
water level in municipal
supply
Protection against low
water level in
replenishment
reservoir
With insulation monitoring
device built into the

switchgear

• Version V: The pressure-boosting system is sup-
plied with a pressure switch connected to the suc-
tion manifold.
NOTICE:
MINIMUM PERMISSIBLE PRESSURE: 1 BAR
• Version B: The pressure-boosting system is sup-
plied with a float switch to install in the replenish-
ment reservoir.
Variant 2: Insulation monitoring device
• With CPI: The switchgear contains CPI for the
pump and monitors the motor insulation and
earthing. Mandatory equipment for energy-
related products (ErP).
• Without CPI
5.5 Switchgear
The switchgear (Fig. 1, No. 3) protects and con-
trols the pressure-boosting system.
• Refer to the switchgear manual for more detailed
information.

5.6 Accessories

The following accessories are available for pur-
chase:
• Gate valves
• Vibration damping bushings
• Pressure reducer
• Pressure tank
• Foot valve strainer
• Warning light
• Start-up tank
Accessories must be ordered separately and must
be installed on the system.

6 Description and function

6.1 Description

The pressure-boosting system is supplied with its
pipework ready for connection. The customer
must connect the suction and discharge manifolds
correctly.
The customer must also connect the switchgear
to the mains power supply.
When making the connection to the municipal
water supply, regulations and currently valid
standards must be observed and, as necessary,
fulfilled pursuant to the regulations of water dis-
tribution companies.
In addition, local specificities must be taken into
account: for example, if the suction pressure is too
high or variable, a pressure reducer must be
installed.

6.2 Operation

The pressure-boosting system is equipped with
non self-priming high-pressure multistage cen-
trifugal pumps.
The pumps are activated when low pressure is
detected (Fig. 1, No. 6) and deactivated when the
flow rate is detected as zero (Fig. 1, No. 8).
English
17