Operation; Setting The Control Mode And Delivery Head - Wilo Yonos MAXO-D Installation And Operating Instructions Manual

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NOTE: The pump body can be vented by briefly switching to speed stage 3 (maximum
speed stage).
WARNING! Risk of injury and damage to property!
It is not permitted to remove the motor head or the flange connection / threaded pipe
union for the purpose of bleeding the system!
• There is a risk of scalding!
Escaping fluid can lead to injuries and damage to property.
• Touching the pump can cause burns!
Depending on the operating status of the pump or unit (fluid temperature), the entire
pump can become very hot.
8.2

Operation

WARNING! Risk of burns!
Depending on the operating status of the system, the entire pump can become very
hot. There is a risk of burns if metallic surfaces are touched (e.g. cooling fins, motor
housing, pump housing). The setting can be made on the control module during normal
operation by pressing the red button. Do not touch any hot surfaces when doing this.
The pump is operated via the operating knob (fig. 1a, item 1.3).

8.2.1 Setting the control mode and delivery head

By turning the operating knob either the control mode and desired delivery head are
selected or the speed stage is set.
Setting the control mode
Variable differential pressure (p-v): fig. 8
The pump for the control mode Δp-v is set at the left of the middle position.
Constant differential pressure (p-c): fig. 9
The pump for the control mode Δp-c is set at the right of the middle position.
3 speed stages (n = constant):
The pump can be set to 3 speed stages (1, 2 or 3) using the operating knob (Fig. 1c).
Setting
1
2
3
* Curves for setting the speed stages are dependent on the type; see the catalogue.
Setting the delivery head
The LED display shows the setpoint set on the pump.
If the operating knob is turned to the left or right, the set setpoint increases for the respec-
tive control mode. If the operating knob is turned back again, the set setpoint is reduced.
Adjustment is done in steps of 0.5 m (up to the delivery head setpoint of 10 m) or in steps
of 1 m (> 10 m delivery head setpoint). Intermediate steps are possible, but are not shown.
14
Display
C1
C2
C3
Speed stage
min.
med.
max.
WILO SE 03/2015