Wilo Helix VE 2 Serie Einbau- Und Betriebsanleitung Seite 56

English
Access lock
Function „Access lock" can be used to lock the
pump settings.
To activate or deactivate this function, proceed
as follows:
• Set switch 2 to the ON position (Fig. A1, Pos. 1).
Menu <7.0.0.0> is called up.
• Turn the rotary knob to enable or disable the
locking function. The current state of the locking
function is indicated by the following symbols:
• Return switch 2 to the OFF position (Fig. A1,
Pos. 1). The display returns to the status page.
8.3.6 Configurations
NOTE: If the pump is supplied as separate part
and as an integral part of a system assembled by
us, the standard configuration mode is „Speed
control".
„Speed control" mode (Fig. 2, 3)
Setting the frequency manually or by external
control:
• For starting up, we recommend to set the motor
speed to 2400 RPM.
„Constant pressure" and
„Variable pressure" mode (Fig. A2, A3, A7)
Regulation by pressure sensor and setpoint
(internal or external).
• The addition of a pressure sensor (with tank;
sensor kit supplied as accessory) allows the
pump to be pressure-controlled (with no water
in the tank, pressurise the tank to a pressure of
0.3 bar below the pressure control value of the
pump).
• The accuracy of the sensor shall be ≤ 1 %, and it
should be used between 30 % and 100 % of the
measuring range. The tank must have a usable
volume of at least 8 litres.
• For starting up, we recommend a pressure set
value of 60 % of the maximum pressure.
„P.I.D. control" mode
Control by a sensor (temperature, flow rate, etc.)
by P.I.D. control and setpoint (internal or exter-
nal).
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Lock enabled: Parameters are locked,
menus are accessible in read-only
mode only.
Lock disabled: Parameters can be
changed, access to menus is allowed
to make setting.
9. Maintenance
All servicing must be performed by an author-
ized service representative only!
WARNING! Risk of electrical shock!
Ensure that any electrical hazard is avoided.
Ensure that the power supply is switched off and
secured against unauthorised switching before
performing any work on the electric system.
WARNING! Risk of scalding!
In case of high water temperatures and high system
pressures, close the insulating valves upstream and
downstream of the pump.
First, allow pump to cool down.
- Helix pumps are designed for low maintenance.
- If required, the mechanical seal can be easily
replaced thanks to its cartridge-type design.
Insert the wedge in the housing (Fig. 6) once
mechanical seal position is set.
- Always keep the pump perfectly clean.
- Pumps which are not used during periods of
frost must be drained to avoid damage: Close the
guard valves, fully open the drain-priming plug
and the venting plug.
WILO SE 09/2013