Xylem Bell & Gossett Ecocirc XL Manuel page 9

4.3.2.2 Off ⇒ On
1. Press shortly the Up arrow button (5)
The Numeric display (6), the Parameters LEDs (4)
and the Control mode LEDs (2) returns to show the
information according to the last settings before the
Off operating mode selection.
2. Change the set point value with the Setting buttons
(5)
After the transition from Off to On operating mode, the
set point (related to the actual control mode) is equal
to the minimum value: change it if necessary.
4.3.3 Control modes
Referring to Figure 7 in the appendix, short press the
Control mode button (1) to select the desired control
mode, following this logical flow:
mode
mode
mode
NOTE:
All control modes can be combined with the Night Mode
function (see sec. 4.3.4.1)
4.3.3.1 Constant Pressure (Head)
The circulator maintains a constant differential pressure
at any flow demand;
Hset
for setting up the desired head of the pump (H
sec. 4.3.1.
When Constant Pressure (which is the factory setting)
is the selected control mode, the
permanently lit.
If the hydraulic working point allows the circulator to
be operated by regulating the head within the electric
power limits, then the target head will coincide with the
desired (set) head.
If the hydraulic working point requires the circulator to
be operated at a working point that exceeds the electric
power limits, then the target head will be de-rated to
remain within the maximum power limitation curve.
Electronic Drive Manual
mode
mode
mode
), see
set
indicator is
Hset
4.3.3.2 Proportional pressure (head)
The circulator pressure is continuously increased/
decreased depending on the increased/decreased flow
demand;
Hset
Hset
2
for setting up the desired maximum head of the pump
(H ), see sec. 4.3.1.
set
When Proportional Pressure is the selected control
mode, the indicator is permanently lit.
Hset
Hset
2
If the hydraulic working point allows the circulator to
be operated by regulating the head within the electric
power limits, then the target head will coincide with the
desired (set) head.
If the hydraulic working point requires the circulator to
be operated at a working point that exceeds the electric
power limits, then the target head will be de-rated to
remain within the maximum power limitation curve.
4.3.3.3 Fixed speed
The circulator maintains a fixed speed at any flow
demand;
Max
min
for setting up the desired speed of the pump, see
sec. 4.3.1.
When Fixed Speed is the selected control mode, the
indicator is permanently lit
If the hydraulic working point allows the circulator to
be operated by regulating the speed within the electric
power limits, then the target speed will coincide with the
desired (set) speed.
If the hydraulic working point requires the circulator to
be operated at a working point that exceeds the
electric power limits, then the target speed will be
de-rated to remain within the maximum power limitation
curve.
Control Panel
Speed
setpoint
Max
min
Speed
setpoint
7