Grundfos Medium UPM Series Installation and operation manual

GRUNDFOS DATA BOOKLET
Medium UPM
UPMM, UPML, UPMXL, UPMXXL, SOLAR PML
EU range
1 x 230 V, 50/60 Hz

Table of contents
2
Medium UPM
1. Introduction 3
Medium UPM - EU range. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Safety instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2. Features and benefits 6
Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Benefits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
ErP, Ecodesign regulation in brief . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Identification. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3. Performance overview 8
4. Product range 9
5. Control mode and signals 10
Control principles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
6. Control modes, user interface and settings 13
Pump control in heating systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Control mode explanation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
User interface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
7. Technical description 19
Exploded view . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Sectional view . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Material specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Description of components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
8. Installation 23
Pumped liquids . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Mechanical installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Electrical installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
9. Startup 31
10. Service 32
11. Disposing of the product 34
12. Performance curves 35
Curve conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
13. Data sheets 36
14. Accessories 45
15. Approvals and certificates 46
EC declaration of conformity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
VDE certificate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Grundfos Product Chemical Compliance declaration concerning the non-use of certain chemical substances . . . . . 47
REACH Regulation (EC 1907/2006) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Customer information regarding REACH, RoHS and other relevant chemical legislation and Grundfos’ Product
Chemical Compliance initiatives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
WEEE Directive 2012/19/EU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
16. Abbreviations 49

Introduction
3
Medium UPM 1
1. Introduction
Medium UPM - EU range
This data booklet applies to the Grundfos Medium UPM pump range.
Applications
In a modern heating, cooling and domestic hot water
supply system there are different circuits in which
Medium UPM pumps in different versions can be
placed. A differentiation must be made between the
heating (or cooling) production and the distribution.
On the production side there are some applications
where pumps are used in primary or internal circuits
e.g. for geothermal or solar thermal brine circuits.
The distribution side is often split into two circuits - a
primary and a secondary circuit - in order to keep the
flow and temperature independent from each other. A
heat exchanger, a hydraulic separator or a buffer tank
can be used for this separation.
For some heating generators (e.g. condensing boilers,
heat pumps or district heating) it is important to keep
the return temperature as low as possible. Therefore it
is necessary to keep the right balance between flow in
primary and secondary circuits. Without separator, the
primary pump creates a differential pressure in the
secondary circuits. A generator effect can happen in
the secondary pump, from which Medium UPM pumps
are protected.
The primary pump is mostly integrated into the heating
appliance and controlled via a control signal (e.g.
PWM or BUS) to ensure the optimum operation of the
boiler, for instance.
Type P1 max. Control
R 1 1/2" x 130 mm CED R 1 1/2" x 180 mm CED R 2" x 180 mm CED R 1" x 130 mm CED R 1 1/2" x 180 mm N
UPMM xx-95 100 W PWM A ●●●●●
UPMM xx-95 AUTO AUTO ●●●●●
UPML xx-105
140 W
PWM A ●●●●●
UPML xx-105 LIN LIN bus ●●●●●
UPML xx-105 AUTO AUTO ●●●●●
SOLAR PML xx-145 140 W PWM C ●●●●●
UPMXL xx-125
180 W
PWM A ●●●●●
UPMXL xx-125 LIN LIN bus ●●●●●
UPMXL xx-125 AUTO AUTO ●●●●●
UPMXXL xx-120 180 W PWM A ●●
UPMXXL xx-120 AUTO AUTO ●●
Application Recommended pump type
Heat production or heat
transmission side
Gas or oil-fired space and combination heaters UPMM/UPML/UPMXL/UPMXXL PWM/LIN
Solid fuel heaters UPMM/UPML/UPMXL/UPMXXL AUTO
Heat pumps (brine side) UPMM/UPML/UPMXL/UPMXXL PWM/LIN
Heat pumps (heating side) UPMM/UPML/UPMXL/UPMXXL PWM/LIN
Mini combined heat and power cogeneration UPMM/UPML/UPMXL/UPMXXL PWM/LIN
Thermal solar system (collector side) SOLAR PML
District heating systems with heat exchanger UPMM/UPML/UPMXL/UPMXXL PWM/LIN
Heat distribution side
Space heating systems UPMM/UPML/UPMXL/UPMXXL AUTO
Space heating and cooling systems UPMM/UPML/UPMXL/UPMXXL AUTO
Domestic hot water generation (heating side) UPMM/UPML/UPMXL/UPMXXL PWM/LIN
Domestic hot water generation (DW side) UPMM/UPML/UPMXL AUTO N
Domestic hot water recirculation UPMM/UPML/UPMXL AUTO N

Introduction
4
Medium UPM
1
Fig. 1 Complete domestic heating system combined with renewable energy sources
On the generation side, most pumps are externally
controlled via control signal ( PWM, LIN bus) by the
appliance control. The pumps on the distribution side
are often stand-alone pumps and mainly internally
controlled (AUTO version). The pumps in circuits with
variable flow are differential-pressure controlled either
as constant pressure (CP) or proportional pressure
(PP) control. In addition to 3 different control curves
each, there is the option to select the AUTOADAPT CP
or PP mode. With AUTOADAPT, the control curve is
automatically adapted to the actual requirements of the
respective application.
For domestic hot water systems, we must offer pumps
with stainless-steel housings that have the necessary
drinking water approvals like UBA, KTW, DVGW, ACS,
KIWA or WRAS.
For solar thermal systems, SOLAR PML pumps are
available, which are suitable for solar media containing
glycol up to 110 °C (peak). They use the PWM-C signal
profile, which is inverse of the PWM-A signal profile.
The PWM-C signal profile stops the pump and avoids
that the pump runs and overheats or unloads the
storage tank, if the signal is missing.
All medium UPM pumps are equipped with spacers to
decouple the terminal box from the motor. The motor is
protected against condensate in the stator with drain
holes. Therefore, all pumps can run down to minus
10 °C with antifreeze media mixtures.
TM07 1736 2218
Solid fuel
boiler
Gas fuel
boiler
Geothermal
heat pump
Solar charging kit
Heat producers Heat consumers
Underfloor
heating kit
Heating kit
Freshwater
station

Introduction
5
Medium UPM 1
Safety instructions
General information
Target group
Qualification and training
The persons responsible for installation, startup,
operation and maintenance must be appropriately
qualified for these tasks. Areas of responsibility, levels
of authority and the supervision of the persons must be
precisely defined by the operating company. If
necessary, the persons must be trained.
Symbols used in this document
Storage and transport
• Observe the permissible ambient conditions.
• The storage location must be protected from rain,
humidity, condensation, direct sunlight and dust.
• Maximum storage time: 2 years from delivery.
• Use appropriate lifting and transporting devices.
• Observe the maximum stacking height of pallets.
Non-observance of the safety instructions may have
dangerous consequences for persons, the
environment and the product.
Read this document before installing the
product. Installation and operation must
comply with local regulations and
accepted codes of good practice.
DANGER
Indicates a hazardous situation which, if
not avoided, will result in death or
serious personal injury.
WARNING
Indicates a hazardous situation which, if
not avoided, could result in death or
serious personal injury.
CAUTION
Indicates a hazardous situation which, if
not avoided, could result in minor or
moderate personal injury.
A blue or grey circle with a white
graphical symbol indicates that an
action must be taken.
If these instructions are not observed, it
may result in malfunction or damage to
the equipment.
Tips and advice that make the work
easier.

Features and benefits
6
Medium UPM
2
2. Features and benefits
Features
The Medium UPM range offers a number of important
features and benefits for the customer:
• Suitable for heating, solar-thermal systems,
geothermal heat pumps and cooling
• Internally or externally speed-controlled, high-
efficiency pumps with electronically commutated
motor (ECM) with permanent-magnet rotor and
frequency converter
• Proven components based on the second UPM
generation
• Improved motor technology and hydraulics for high
pump efficiency
• Meets all Ecodesign requirements of the ErP
regulation EU/622/2012
• Functional design concentrating on the essentials,
fitting in the smallest space
• Easy operation and convenient setting via external
control signals or button
• Electronics separated from the motor for operation
in condensing environments
• Motor protected against condensed water by means
of drain holes and double-coated wiring
• Fits into the confined space inside boilers and heat
pumps
• Electrical compatibility with existing PWM
controllers
• Low ambient temperature constraints (EN 60335)
• Electrocoated cast-iron housing for the prevention
of inside and outside corrosion
• Low flow noise
• High starting torque for reliable starting
• Suitable for cold antifreeze media containing glycol
or ethanol
• Standard delivery with plug for easy electrical
connection and quick and safe installation
Benefits
• Use up to 80 % less electrical power than
conventional constant-speed pumps.
• Use up to 60 % less electrical power than
conventional speed-controlled pumps.
• Highly reliable, based on a range with more than 1
million units installed with success since 2006.
• Cost-optimised and highly available thanks to the
use of existing mass production facilities.
ErP, Ecodesign regulation in brief
The EU has addressed the climate challenge in a EuP/
ErP directive: Since August 2015, all stand-alone
pumps as well as pumps integrated in boiler systems,
solar systems and heat pump systems must fulfil
Ecodesign requirements, defined in regulation 641/
2009/EC on glandless pumps, which was amended by
622/2012/EC. The regulation has set radically new
standards for energy efficiency.
The essentials
• Glandless pumps integrated in products must have
an energy efficiency index (EEI) of not more than
0.23. The benchmark level is 0.20.
• Stand-alone pumps are measured according to EN
16297-2.
• Integrated pumps are measured according to EN
16297-3, due to their various functions integrated in
many customised hydraulic solutions on the market.
• All pumps integrated in products which generate
and/or transfer heat and all types of media are
included. This means that not only heating systems,
but also solar-thermal and heat pump systems are
affected by the Ecodesign regulation.
• Non-compliant spare pumps for integrated pumps
sold before August 2015 are allowed until January
1st, 2022.
• Pumps designed for recirculation of drinking water
are out of the scope of this regulation.
• Conformity with EU regulations is governed through
mandatory CE marking.
All Grundfos Medium UPM pumps meet the Ecodesign
requirements measured by EN 16297-2 and EN
16297-3:2012.

Features and benefits
7
Medium UPM 2
Identification
Type key Nameplate
Fig. 2 Nameplate
Example: UPM XL 25 -105 180 AUTO
Type
UPM Standard
SOLAR PM For thermal solar systems
Power variant
M 100 W
L 140 W
XL 180 W
XXL 180 W
Nominal diameter
15 R 1/2" / G 1"
25 R 1" / G 1 1/2"
32 R 1 1/4" / G 2"
Nominal head
95 9.5 m
105 10.5 m
120 12.0 m
125 12.5 m
145 14.5 m
Pump housing, port-to-port length
130 Cast iron CED, 130 mm
180 Cast iron CED, 180 mm
N 180 Stainless steel, 180 mm
Control variant
AUTO Internally controlled
Externally controlled via PWM
LIN Externally controlled via LIN bus
TM05 7899 1613
Pos. Description
1 Product type
2 Voltage [V]
3 Frequency [Hz]
4 Legal product code
5 Control signal
6 Rated current [A] at maximum and minimum performance
7 Input power P1 [W] at maximum and minimum performance
8 Speed
9 Approval marks
10 Direction of rotation, direction of deblocking
11 Product number
12 Production code, year, week and customer ID
13 Country of origin
14 CE mark
15 Enclosure class
16 Temperature class
17 Maximum system pressure [MPa]
18 Energy index
19 Customer item number

Performance overview
8
Medium UPM
3
3. Performance overview
Fig. 3 Medium UPM performance overview
TM07 2174 2518
0
2
4
6
8
10
12
14
16
0.0 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0
H
[m]
Q [m³/h]
SOLAR PML xx-145 140 W
UPMXL xx-125 180 W
UPMXXL xx-120 180 W
UPML xx-105 140 W
UPMM xx-95 100 W

Product range
9
Medium UPM 4
4. Product range
Pump type P1 max. Control Housing Page
UPMM 15-95 130
100 W PWM A
R 1" x 130 mm CED
36
UPMM 25-95 130 R 1 1/2" x 130 mm CED
UPMM 25-95 180 R 1 1/2" x 180 mm CED
UPMM 25-95 180 N R 1 1/2" x 180 mm N
UPMM 32-95 180 R 2" x 180 mm CED
UPMM 15-95 130 AUTO
100 W AUTO
R 1" x 130 mm CED
37
UPMM 25-95 130 AUTO R 1 1/2" x 130 mm CED
UPMM 25-95 180 AUTO R 1 1/2" x 180 mm CED
UPMM 25-95 180 N AUTO R 1 1/2" x 180 mm N
UPMM 32-95 180 AUTO R 2" x 180 mm CED
UPML 15-105 130
140 W PWM A
R 1" x 130 mm CED
38
UPML 25-105 130 R 1 1/2" x 130 mm CED
UPML 25-105 180 R 1 1/2" x 180 mm CED
UPML 25-105 180 N R 1 1/2" x 180 mm N
UPML 32-105 180 R 2" x 180 mm CED
UPML 15-105 130 LIN
140 W LIN bus
R 1" x 130 mm CED
38
UPML 25-105 130 LIN R 1 1/2" x 130 mm CED
UPML 25-105 180 LIN R 1 1/2" x 180 mm CED
UPML 25-105 180 N LIN R 1 1/2" x 180 mm N
UPML 32-105 180 LIN R 2" x 180 mm CED
UPML 15-105 130 AUTO
140 W AUTO
R 1" x 130 mm CED
39
UPML 25-105 130 AUTO R 1 1/2" x 130 mm CED
UPML 25-105 180 AUTO R 1 1/2" x 180 mm CED
UPML 25-105 180 N AUTO R 1 1/2" x 180 mm N
UPML 32-105 180 AUTO R 2" x 180 mm CED
SOLAR PML 15-145 130
140 W PWM C
R 1" x 130 mm CED
40
SOLAR PML 25-145 130 R 1 1/2" x 130 mm CED
SOLAR PML 25-145 180 R 1 1/2" x 180 mm CED
SOLAR PML 25-145 180 N R 1 1/2" x 180 mm N
SOLAR PML 32-145 180 R 2" x 180 mm CED
UPMXL 15-125 130
180 W PWM A
R 1" x 130 mm CED
41
UPMXL 25-125 130 R 1 1/2" x 130 mm CED
UPMXL 25-125 180 R 1 1/2" x 180 mm CED
UPMXL 25-125 180 N R 1 1/2" x 180 mm N
UPMXL 32-125 180 R 2" x 180 mm CED
UPMXL 15-125 130 LIN
180 W LIN bus
R 1" x 130 mm CED
41
UPMXL 25-125 130 LIN R 1 1/2" x 130 mm CED
UPMXL 25-125 180 LIN R 1 1/2" x 180 mm CED
UPMXL 25-125 180 N LIN R 1 1/2" x 180 mm N
UPMXL 32-125 180 LIN R 2" x 180 mm CED
UPMXL 15-125 130 AUTO
180 W AUTO
R 1" x 130 mm CED
42
UPMXL 25-125 130 AUTO R 1 1/2" x 130 mm CED
UPMXL 25-125 180 AUTO R 1 1/2" x 180 mm CED
UPMXL 25-125 180 N AUTO R 1 1/2" x 180 mm N
UPMXL 32-125 180 AUTO R 2" x 180 mm CED
UPMXXL 25-120 180 180 W PWM A R 1 1/2" x 180 mm CED 43
UPMXXL 32-120 180 R 2" x 180 mm CED
UPMXXL 25-120 180 AUTO 180 W AUTO R 1 1/2" x 180 mm CED 44
UPMXXL 32-120 180 AUTO R 2" x 180 mm CED

Control mode and signals
10
Medium UPM
5
5. Control mode and signals
Control principles
Some medium UPM pumps are controlled via a digital
low-voltage pulse-width modulation (PWM) signal,
which means that the speed of rotation depends on the
input signal. The speed changes as a function of the
input profile. These communication signals are
standardised in the VDMA Einheitsblatt 24244 "Wet
runner circulating pumps - Specification of PWM
control signals".
Control signals
Digital low-voltage PWM signal
The square-wave PWM signal is designed for a 100 to
4,000 Hz frequency range. The PWM signal is used to
select the speed (speed command) and as feedback
signal. The PWM frequency on the feedback signal is
fixed at 75 Hz in the pump.
Duty cycle
d % = 100 x t/T
Example
Fig. 4 PWM signal
Interface
The Medium UPM PWM interface consists of an
electronic part connecting the external control signal to
the pump. The interface translates the external signal
into a signal type that the microprocessor can
understand.
In addition, the interface ensures that the user cannot
get into contact with dangerous voltage if touching the
signal wires when power is connected to the pump.
Note: "Signal ref." is a signal reference with no
connection to protective earth.
Fig. 5 Schematic drawing, interface
Example Rating
T = 2 ms (500 Hz) UiH = 4-24 V
t = 0.6 ms UiL ≤ 1 V
d % = 100 x 0.6 / 2 = 30 % IiH = 10 mA
TM04 9911 0211
Abbreviation Description
T Period of time [sec.]
d Duty cycle [t/T]
UiH High-level input voltage
UiL Low-level input voltage
IiH High-level input current
T
t
UiH
UiL
TM06 0787 0914
5
9
S
5
%&%
%&%
36
&1<)
N N
PWM output
PWM input
Signal ref.
Galvanic isolation
Pump electronics

Control mode and signals
11
Medium UPM 5
PWM input signal profile A (heating)
At high PWM signal percentages (duty cycles), a
hysteresis prevents the pump from starting and
stopping if the input signal fluctuates around the
shifting point. At low PWM signal percentages, the
pump speed is high for safety reasons. In case of a
cable breakage in a gas boiler system, the pump
continues to run at maximum speed to transfer heat
from the primary heat exchanger. This is also suitable
for heating pumps to ensure that the pumps transfer
heat in case of a cable breakage.
Fig. 6 PWM input profile A (heating)
PWM input signal profile C (solar)
At low PWM signal percentages (duty cycles), a
hysteresis prevents the pump from starting and
stopping if the input signal fluctuates around the
shifting point. Without PWM signal percentages, the
pump will stop for safety reasons. If a signal is missing,
for example due to a cable breakage, the pump will
stop to avoid overheating of the solar thermal system.
Fig. 7 PWM input profile C (solar)
PWM feedback signal - power consumption
(standard)
The PWM feedback signal offers pump information like
in bus systems:
• current power consumption (accuracy ± 2 % of
PWM signal)
• warning
•alarm
• operation status.
Alarms
Alarm output signals are available because some
PWM output signals are dedicated to alarm
information. If a supply voltage is measured below the
specified supply voltage range, the output signal is set
to 75 %. If the rotor is blocked due to deposits in the
hydraulics, the output signal is set to 90 %, because
this alarm has a higher priority.
Fig. 8 PWM feedback signal, power consumption
QT = qualification time, DT = disqualification time
TM07 1737 2218
PWM input signal
[%] Pump status
≤ 10 Maximum speed: max.
> 10 / ≤ 84 Variable speed: min. to max.
> 84 / ≤ 91 Minimum speed: min.
> 91/95 Hysteresis area: on/off
> 95 / ≤ 100 Standby mode: off
TM07 1738 2218
PWM input signal
[%] Pump status
≤ 5 Standby mode: off
> 5 / ≤ 8 Hysteresis area: on/off
> 8 / ≤ 15 Minimum speed: min.
> 15 / ≤ 90 Variable speed: min. to max.
> 90 / ≤ 100 Maximum speed: max.
510 5020 30 40 60 70 80 90 100
Max.
PWM input signal [%]
Speed
510 5020 30 40 60 70 80 90 100
Max.
PWM input signal [%]
Speed
TM07 1739 2218
Pos. Type Description
1 UPMM, UPML, SOLAR PML slope 2 W/%, saturation point,
140 W
2 UPMXL, UPMXXL slope 3 W/%, saturation point,
210 W
PWM output
signal
[%]
QT
[s] Pump info DT [s] Priority
95 0 Standby (STOP) by PWM signal 0 1
90 30 Alarm, stop, blocked error 12 2
85 0-30 Alarm, stop, electrical error 1-12 3
75 0 WARNING 0 5
0-70 0-140 W (slope 2 W/% PWM) 6
Output frequency: 75 Hz ± 5 %
25 50 100 150 200 250
10
20
30
40
50
60
70
80
90
100
1
2
Standby (stop)
Alarm stop: Fault, blocked pump
Alarm stop: Electrical fault
Slope: 2 W/%
Power [W]
PWM output [%] (output frequency 75 Hz ± 5 %)
Slope: 3 W/%

Control mode and signals
12
Medium UPM
5
PWM feedback signal - flow estimation (on request)
On request, there is an option where the PWM
feedback signal can also be used to indicate the flow
of the pump on defined pump housings (e.g. cast iron
inline) above a head of 1 m. The accuracy of the
feedback signal is depending on the media, media
temperature and operation point, but it gives an
indication on the actual flow.
Example: The PWM output range between 0-70 %
shows the flow between 0 and 4 m3/h with a slope of
0.057 m3/h / % PWM.
Fig. 9 PWM feedback signal - flow estimation
Data
LIN bus (on request)
On request, there is an option of Medium UPM pumps
with LIN bus communication. This data bus has been
developed as a Local Interconnect Network (LIN) in
the automotive sector and is used in vehicles.
"VDMA Einheitsblatt 24226" defines the specification
of an appliance-integrated fieldbus system based on
the LIN bus. With the LIN bus, serial data can be
transmitted for control, monitoring and analysis.
Data transmitted from the LIN bus can be defined by
Grundfos.
Fig. 10 LIN bus on fieldbus of heating control systems
TM07 1789 2218
Maximum rating Symbol Value
PWM frequency input with high-speed
optocoupler f 100-4000 Hz
Guaranteed standby power consumption < 3 W
Rated input voltage - high level UiH 4-24 V
Rated input voltage - low level UiL < 1 V
High-level input current IiH < 10 mA
Input duty cycle PWM 0-100 %
PWM frequency output, open collector f 75 Hz ± 5 %
Accuracy of output signal regarding power
consumption
Note: A PWM output signal below 5 % is too
inaccurate for the calculation of the flow.
± 2 % (of
PWM signal)
Accuracy of output signal regarding flow:
< 1 m3/h
> 1 m3/h
± 0.1 m3/h
± 0.2 m3/h
Output duty cycle PWM 0-100 %
Collector emitter breakdown voltage on
output transistor Uc< 70 V
Collector current on output transistor Ic< 50 mA
Maximum power dissipation on output
resistor PR60 mW
Zener diode working voltage Uz36 V
Maximum power dissipation in Zener diode Pz500 mW
10
20
30
40
50
60
70
80
90
100
0 1.0 2.0 3.0 4.0
Flow [m3/h]
Standby (stop)
Alarm stop: Fault, blocked pump
Alarm stop: Electrical fault
Warning Saturation at 4 [m3/h]
0.0-4 [m
3
/h] (Slope: 0.057 [m
3
/h]
Warning: Electronics high temp.
PWM output [%] (output frequency 75 Hz ± 5 %)
TM07 2079 2618
CONNECTIVITY
LIN BUS
MࢡpV
•
BMS
BUILDING MANAGEMENT
SYSTEM

Control modes, user interface and settings
13
Medium UPM 6
6. Control modes, user interface and settings
Pump control in heating systems
The heating required in a building varies greatly during
the day due to changing outdoor temperatures, solar
radiation and heat emanating from people, electric
appliances, and others. In addition, the need for
heating may vary from one section of the building to
another and the thermostatic valves of some radiators
may have been turned down by the users. An
uncontrolled pump will produce a too high differential
pressure when the heat demand and flow are low.
Possible consequences:
• too high energy consumption
• irregular control of the system
• noise in thermostatic radiator valves and similar
fittings.
Grundfos Medium UPM AUTO pumps automatically
control the differential pressure by adjusting the
performance to the actual heat demand, without the
use of external components.
Control mode explanation
Medium UPM - externally controlled by a
control signal from the system controller
Some Medium UPM pumps are available with external
digital PWM control signal.
PWM A profile (heating) (externally controlled)
The pump runs on constant-speed curves depending
on the current PWM value (regarding VDMA 24244).
The speed decreases when the PWM value increases.
If PWM equals 0, the pump runs at maximum speed.
PWM C profile (solar) (externally controlled)
The pump runs on constant-speed curves depending
on the current PWM value.
The speed increases when the PWM value increases.
If PWM equals 0, the pump stops.
Other external communication signals
Some Medium UPM pumps are available with LIN bus
signal.
Medium UPM AUTO - internally controlled
by the integrated pump controller
Proportional Pressure (internally controlled)
The head (pressure) is reduced with falling heat
demand and increased with rising heat demand.
The duty point of the pump will move up or down on
the selected proportional-pressure curve, depending
on the heat demand in the system.
• PP1: lowest proportional-pressure curve
• PP2: intermediate proportional-pressure curve
• PP3: highest proportional-pressure curve
•AUTO
ADAPT: highest to lowest proportional-
pressure curve.
In Proportional Pressure AUTOADAPT, the pump is set
to proportional-pressure control.
The AUTOADAPT function enables the pump to control
the pump performance automatically within a defined
performance range.
• Adjusting the pump performance to the size of the
system.
• Adjusting the pump performance to the variations in
load over time.
TM06 0706-4 1918TM06 0707-4 1918
TM06 0704 0814

Control modes, user interface and settings
14
Medium UPM
6
Constant Pressure
The head (pressure) is kept constant, irrespective of
the heat demand.
The duty point of the pump moves out or in on the
selected constant-pressure curve, depending on the
heat demand in the system.
The Constant Pressure/power mode limits the
maximum power consumption, like formerly the
performance of standard pumps with speed selector.
At reduced flow, the head increases. When the
maximum head selected is reached, the speed of the
pump is reduced to keep this head (differential
pressure) down to zero flow.
• CP1: lowest constant-pressure curve
• CP2: intermediate constant-pressure curve
• CP3: MAX curve
•AUTO
ADAPT: highest to lowest constant-pressure
curve.
In Constant Pressure AUTOADAPT, the pump is set to
constant-pressure control.
The AUTOADAPT function enables the pump to control
the performance automatically within a defined
performance range.
• Adjusting the pump performance to the size of the
system.
• Adjusting the pump performance to the variations in
load over time.
Advantages of pump control
In Grundfos Medium UPM AUTO, pump control is
effected by adapting the differential pressure to the
flow (proportional-pressure and constant-pressure
control). Unlike an uncontrolled pump, a constant-
pressure-controlled pump keeps the differential
pressure constant. A proportional-pressure-controlled
pump reduces the differential pressure as a result of
falling heat demand.
For example:
If the heat demand falls, for instance due to solar
radiation, the thermostatic radiator valves close, and,
for the uncontrolled pump, the flow resistance of the
system rises, for instance from A1 to A2.
In a heating system with an uncontrolled pump, this
situation causes a pressure rise in the system by ΔH1.
Fig. 11 Uncontrolled pump
In a system with a proportional-pressure-controlled
pump operated in the proportional pressure mode, the
pressure is reduced by ΔH2 and results in reduced
energy consumption.
Fig. 12 Pump operated in proportional-pressure control
mode
In a system with an uncontrolled pump, a pressure rise
often causes flow-generated noise in the thermostatic
radiator valves. With proportional pressure control, this
noise is reduced considerably.
AUTOADAPT
Grundfos holds a patent for AUTOADAPT since 1995.
With AUTOADAPT, the control curve is automatically
adapted to the actual requirements of the respective
application.
If you select AUTOADAPT, the pump starts with the
medium proportional or constant control curve and
runs on this curve as long as a new curve will be
adapted.
The AUTOADAPT proportional pressure functionality is
well known from millions of installed Grundfos trade
pumps as ALPHA2 or MAGNA. The AUTOADAPT
setting continually analyses and finds the setting
where optimal comfort meets minimal energy
consumption. It automatically delivers perfect comfort
at the lowest possible energy level. It adapts to the
requirements of the heating system before reaching
the maximum pump curve and allows the pump to
adjust the proportional pressure or constant pressure
curve both up and down.
TM06 0705-3 1918
TM06 0857 1014TM06 0858 1014
DH
1
A
2
A
1
1
2
H
Q
DH
2
A
2
A
1
1
2
H
Q

Control modes, user interface and settings
15
Medium UPM 6
Advantages of AUTOADAPT
• Easy installation
• Automatic setting
• Demand-controlled operations
• Optimum comfort
• Energy savings
• Reduced CO2 emissions.
Constant pressure at all load conditions is essential for
how well the thermostatic valves can control the heat
emission from the radiators. It is a well-known fact that
optimum pump control in a two-pipe heating system
with thermostatic radiator valves is best obtained by
controlling pump pressure on a proportional pressure
curve. In systems as underfloor heating or one-pipe
systems it might be better to use Constant Pressure
control. However, predicting the best position in real-
life applications is rather difficult, because the optimum
position depends on correlated factors such as the
size of the heating system, the boiler type, the load
condition, etc. This is where AUTOADAPT steps in to
ensure that the pump is controlled in an optimum
manner.
The AUTOADAPT algorithm
The objective of the AUTOADAPT algorithm is to
measure and analyse the heating system during
operation and adapt to the current heating pattern. The
system adapts to night vs. day operations, summer vs.
winter season, and heat losses or gains affecting room
temperature, for example, from radiators, walls and
windows, sun radiation, electrical equipment, and
people.
AUTOADAPT three-step task
Fig. 13 The AUTOADAPT three-step task
Basically, AUTOADAPT optimises the position of the
proportional or constant pressure curve via a three-
step task.
The "system analyser" analyses the heating system of
which the pump is a part. On the basis of the analysis,
AUTOADAPT verifies whether the pump pressure is too
high or too low or correct. The "curve selector" uses
this knowledge to select the optimum proportional-
pressure or constant-pressure curve for the pump. The
pump is controlled according to the selected
proportional-pressure or constant-pressure curve by
means of the "Proportional Pressure or Constant
Pressure control". The pump continues this cycle as
long as it is running.
Example
This example shows proportional pressure
AUTOADAPT.
Note: The Constant Pressure AUTOADAPT function
acts accordingly just by utilising Constant Pressure
control, and not Proportional Pressure control as
shown in the example below.
The AUTOADAPT function can operate and adjust pump
speed according to duty point within a specific area.
Fig. 14 Proportional pressure AUTOADAPT operation area
As default the AUTOADAPT is preset to operate the
pump on the middle proportional pressure curve. By
use of an immediate acting PI-controlling function the
pump will adapt to the system on this proportional
pressure curve.
Note: The PI controller is set to eliminate any offset
within a time frame of 120 seconds.
Fig. 15 Proportional pressure control
TM06 0786 0914
Proportional or constant
pressure control
System
analyser
Curve selector
TM06 0848 1014TM06 0851 1014
Pump max. curve
H
Q

Control modes, user interface and settings
16
Medium UPM
6
System analyser
From the preset reference duty point, the pump will
immediately start to analyse the heating pattern.
The system resistance (Ksys) is logged and based on
this data, a more optimal curve for operation is
selected.
Note: Ksys = m3/h to create a system pressure loss of
1 bar.
Fig. 16 Ksys-values logged for the system analyser
If the actual duty point deviates from the reference
duty point over time, the pump will automatically adjust
its performance accordingly. If a tendency of operation
in area A is shown, the performance of the pumps is
too high. The pump will then select a lower
proportional curve. In other words, if the requirement
of the heating system exceeds the reference duty
point, the pump will choose a higher proportional
pressure curve. Should the requirement be lower, a
lower curve will be chosen.
Curve selector
Fig. 17 Duty point on selected proportional pressure curve
Note: The arrows symbolise the change of the
proportional pressure curve.
New reference setting
When changing the proportional pressure curve setting
to adapt to the requirements of the heating system,
AUTOADAPT automatically sets a new reference duty
point. From the new setting, the process starts over
again: AUTOADAPT will continuously adapt to changes
in the heating pattern.
Fig. 18 New lower proportional pressure curve
TM06 0845 1014TM06 0849 1014
30 30.5 31 31. 5 32 32.5 33 33.5 34
0
0.02
0.04
0.06
0.08
0.1
0.12
0.14
0.16
0.18
0.2
Area A
Area B
K-value
Time [days]
Reference duty
point
A
B
H
Q
Reference curves
TM06 0850 1014
H
Q

Control modes, user interface and settings
17
Medium UPM 6
Selection of control mode
The selection of the control mode depends on the
system type and the allocation of pressure losses
defined by the valve or consumer authority.
System type Recommended control mode
Heating system with PWM control of the pump.
PWM A profile
Solar system with PWM control of the pump.
PWM C profile
System without PWM control of the pump (stand-alone). Internally controlled
Variable-flow system with relatively
high pressure losses inside heating
appliance and pipes (> 50 % of pump
head).
Two-pipe systems with
thermostatic radiator valve with
low valve authority.
HN > 2 m for noise reduction.
Proportional pressure / AUTOADAPT
proportional pressure
Long distribution pipes.
High pressure losses in system parts
with total flow.
Heat consumers with low pressure
losses.
Primary pump. Primary circuit with high pressure
losses.
Variable-flow system with relatively
low pressure losses inside heating
appliance and pipes (< 50 % of pump
head).
Two-pipe systems with
thermostatic radiator valve with
high valve authority.
HN ≤ 2 m for noise reduction.
Constant Pressure / AUTOADAPT
Constant Pressure
Former gravity systems.
Low pressure losses in system parts
with total flow.
Heat consumers with high pressure
losses.
Floor heating system with
variable flow.
System with thermostatic zone
valves.
One-pipe system with variable
flow.
System with thermostatic radiator
valves.
Primary pump. Primary circuit with low pressure
losses.
Systems with low flow variation. Systems with minimum flow ensured
by an automatic bypass valve.

Control modes, user interface and settings
18
Medium UPM
6
User interface
Externally controlled versions
Externally PWM controlled Medium UPM pumps have
no user interface. LIN versions have a red and green
LED for indication of fault and communication.
AUTO versions
Internally controlled Medium UPM AUTO pumps have
a user interface with one button and three LEDs.
Fig. 19 UPM AUTO user interface
The user interface allows to select between 8 control
curves in two control modes:
• 3 proportional pressure curves (PP) plus
AUTOADAPT PP
• 3 constant pressure/power curves (CP) plus
AUTOADAPT CP
Fig. 20 Manual curve setting
Fig. 21 Serial curve setting
The first time, the pump starts with the factory
presetting: Proportional pressure curve, PP2.
• Push the button for 2 seconds:
– the pump goes to setting mode - LED starts
flashing.
• With each push, the setting changes:
– LEDs 1-2-3 are permanently on, the control curve
and mode are changed.
• Flashing mode:
– Fast: Proportional pressure
– Slow: Constant pressure/power
• If the button is not pushed for ten seconds:
– the setting is adapted.
– the pump returns into operating mode
During operation, the display shows the selected
setting.
• LED 1 or 2 or 3 is permanently on.
– Pump is running with the selected curve and
mode.
TM07 2009 2518
TM07 1791 2218TM07 1422 2518
PP1 PP2 PP3
CP1CP2CP3
PPAA
CPAA
CP =PP =
PP
CP
1 click
1 click
Hold 2 sec.

Technical description
19
Medium UPM 7
7. Technical description
Exploded view
Fig. 22 UPML exploded view
TM05 0418 1113

Technical description
20
Medium UPM
7
Sectional view
Fig. 23 UPML, UPMXL and SOLAR PML sectional view
Material specification
TM04 9747 5110
Pos. Component Material EN/DIN AISI/ASTM
1a Spacer Composite PET 30 % GF
1b
Control box housing Composite PET 30 % GF
Control box bottom Composite PPE/PS 20 % GF
Control electronics PCB with SMD components
Control box cooling cover Aluminium
1c Heat sink with cooling pad (only UPMXL) Aluminium, AlSi11Cu2 EN 46100
2 Radial bearing Ceramics
3 Nameplate Composite, PA 66
5 Stator housing Aluminium, AlSi10Cu2
5a Stator windings Copper wire
Stator lamination Laminated iron
6 Vent and deblocking screw Brass, nickelled, Ms58 2.0401.30
7 O-ring EPDM ID2034
9 Rotor can Stainless steel 1.4301/1.4521 304
9a Radial bearing Ceramics
10 Gasket EPDM rubber
11
Shaft Ceramics
Rotor stack Laminated iron
Rotor magnet NdFeB
Rotor cladding Stainless steel 1.4301/1.4521 304
12 Thrust bearing Carbon
Thrust bearing retainer EPDM rubber
13 Bearing plate Stainless steel 1.4301 304
15 Split cone Stainless steel 1.4301 304
16 Impeller Composite/PES 30 % GF
17 Neck ring Stainless steel 1.4301 304
18 Pump housing Cast iron EN-GJL-150
Stainless steel 1.4308 CF8