Grundfos UPS3 15-50/65 - Control Functions; Operating Panel and Indicators; Control Modes

English (GB)
11
6. Control functions
6.1 Operating panel
Fig. 12 Operating panel
The operating panel shows the following:
• The control mode, after pressing the button
• Alarm status
6.1.1 Alarm or warning
If the pump has detected one or more alarms or warnings, the
first LED switches from green to red. When the fault has been
resolved the operating panel switches back to operating status.
See section 9. Fault finding the product.
6.2 Control modes
The pump has seven different control modes. Learn more about
them in the following sections.
6.2.1 Constant curve or constant speed, I, II or III (factory
setting)
At constant-curve or constant-speed operation, the pump runs at
a constant curve. The pump performance follows the selected
performance curve, I, II or III. See fig. 15 where II has been
selected.
Fig. 13 Constant-curve/-speed curve
The selection of the constant-curve or constant-speed setting
depends on the characteristics of the heating system in question.
6.2.2 Proportional pressure I, II
In proportional-pressure mode the pump performance follows the
selected performance curve I or II and adjusts the pump
performance to the actual heat demand in the system following
the proportional-pressure curve.
Fig. 14 Proportional-pressure curve
* Proportional pressure mode is not recommended in heating
systems that include an automatic bypass valve to ensure a
minimum flow for the heating appliances.
6.2.3 Constant pressure I, II
In constant-pressure mode the pump follows the selected
constant-pressure curve I or II, adjusts the pump performance to
the actual heat demand in the system following the selected
constant-pressure curve.
Fig. 15 Constant-pressure curve
Heating systems are relatively slow systems that cannot be set to
the optimum operation within minutes or hours.
If the recommended pump setting does not give the desired
distribution of heat in the rooms of the house, change the pump
setting to the shown alternative.
TM07 1516 1618
Symbol Description
Push-button
I, II, III
Constant curve or constant speed curve I, II and
III
Proportional-pressure mode I, II
Constant-pressure mode, I, II
TM06 8822 1217
The pump is factory-set to constant curve III.
UPS3
Hold 3 sec.
Q
H
System
type
Recommended control
mode
Alternative control
mode
One-pipe
heating
system
Constant-pressure mode.
See section 6.2.3 Constant
pressure I, II
Constant curve or
constant speed, I, II
or III.
TM07 1552 1618
System
type
Recommended
control mode
Alternative control mode
Two-pipe
system
Proportional-
pressure mode*
Constant curve or constant
speed I, II, III, see section
6.2.1 Constant curve or
constant speed, I, II or III
(factory setting)
TM07 1553 1618
System
type
Recommended
control mode
Alternative control mode
Underfloor
heating
system
Constant-pressure
mode
Constant curve or constant
speed I, II, III, see section
6.2.1 Constant curve or
constant speed, I, II or III
(factory setting)
Q
H
I
II
Q
H
I
II