User Guide

ManualsBrandsWilo ManualsCirculator PumpsStratos GIGA 1.5/3-105, 3-Speed Cast Iron Stratos GIGA Series Inline Circulator, 3 HP

English

14 WILO SE 06/2011

Δp-v:

The electronics linearly change the differential pressure setpoint to

be kept by the pump between the delivery heads H

and ½ H

. The

differential pressure setpoint H

decreases or increases with the

volume flow (Fig. 16).

Q = Volume flow

H = Differential pressure (min./max.)

= Differential pressure setpoint

NOTE:

For further information about setting the control mode and the asso-

ciated parameters, see chapter 8 “Operation” on page 29 and

chapter 9.4 “Setting the control mode” on page 47.

NOTE:

A differential pressure sensor is needed for the control modes that are

being performed (Δp-c and Δp-v) which sends the actual value to the

electronics.

Manual control mode:

The speed of the pump can be kept to a constant speed between n

min

and n

max

(Fig. 17). “Manual control” mode deactivates all other con-

trol modes.

PID control:

If the aforementioned standard control modes cannot be used – e.g.

if other sensors are to be used or the distance to the pump is very

long – then the PID control (Proportional-Integral-Differential con-

trol) is available.

By selecting a good combination of individual control portions, the

operator can ensure fast reacting, constant control without lasting

setpoint deviations.

The output signal of the selected sensor can take any intermediate

value. The respective actual value reached (sensor signal) will be

shown as a percentage (100% = maximum measurement range of the

sensor) on the status page of the menu.

NOTE:

The displayed percentage value only corresponds indirectly to the cur-

rent delivery head of the pump(s). It can be, for example, that the maxi-

mum delivery head has already been reached at a sensor signal < 100%.

For further information about setting the control mode and the asso-

ciated parameters, see chapter 8 “Operation” on page 29 and

chapter 9.4 “Setting the control mode” on page 47.

6.3 Dual pump function/Y-pipe

application

NOTE:

The properties described below are only available if the internal

MP interface (MP = Multi Pump) is used.

• Both pumps are controlled by the master pump.

If one of the pumps malfunctions, the other will run according to the

master's control settings. In case of a total failure of the master, the

slave pump operates at emergency operation speed.

Fig. 16: Δp-v control

max

½ H

min

Fig. 17: Manual control mode

min

max