WALPOL WPO55 User manual

Potentiometer speed control units
Assembly and operating instructions
Version 6.1
B14

2
Content
1. General information 3
1.1. Note symbols 3
2. Important safety instructions 3
2.1. Personnel 3
2.2. Safety rules for working in and on electrical installations 4
3. Warranty 4
4. Delivery, transport, storage 4
5. Description 5
5.1. Speed controller type WPO 55 5
5.2. Speed controller type WPO 5
6. Installation 6
7. Electrical connection 7
8. Connection diagram and function 7
8.1. Speed controller WPO 55 5-stage 7
8.2. Speed controller WPO infinitely variable 8
9. Commissioning 8
10. Disposal 9
11. Spare parts 9
12. EU Declaration of Conformity 9

3
1. General information
1.1. Note symbols
Danger
Immediate hazard
Failure to observe the warning will result in immedi-
ate death or serious injury.
Caution
Low-risk hazard
Failure to observe the warning may result in
moderate injury.
Warning
Potential hazard
Failure to observe the warning may result in death or
serious injury.
Important
Danger with risk of property damage
Failure to observe the warning may result in
property damage.
Note
Useful information and instructions
2. Important safety instructions
Planners, system builders and operators are responsible for proper installation and operation in accordance with the inten-
ded use.
• Read the operating instructions completely and carefully.
• Operating instructions and applicable documents, such as electrical connection diagrams or operating instructions for
the motor, must be kept with the speed controller. They must always be available at the place of use.
• Local and national laws and regulations must be observed and complied with.
• Take into account the system-relevant conditions and requirements of the system manufacturer or system builder.
• Safety devices must not be dismantled, bypassed or rendered inoperative.
• The speed controller may only be used if it is in perfect condition.
• The generally prescribed electrical and mechanical protective devices must be provided.
• Secure the installation site and the premises against access by unauthorised persons during installation, electrical
connection, commissioning, troubleshooting and maintenance.
• Safety devices must not be dismantled, bypassed or rendered inoperative.
• Ensure that all warning labels on the speed controller are complete and legible.
• This appliance is not intended for use by persons (including children) with reduced physical or mental capabilities,
or lack of experience and knowledge, unless they have been given supervision or instruction concerning use of the
appliance by a person responsible for their safety.
• Children must not play with the appliance.
2.1. Personnel
The speed governor may only be operated by qualified, instructed and trained personnel. These persons must know the
relevant safety regulations in order to recognise and avoid possible dangers. The individual actions and qualifications can be
found in Table 1 Qualification.

4
Table 1 Qualification
Actions Qualification
Storage, operation, transport, cleaning,
disposal
Trained personnel (s. following instructions)
Electrical connection, commissioning,
electrical disconnection, installation,
Dismantling
Qualified electricians or persons with appropriate qualifications
Maintenance Qualified electricians or persons
with appropriate qualifications
Qualified fitters or persons with
appropriate qualifications
Repairs Qualified electricians or persons
with appropriate qualifications
Qualified fitters or persons with
appropriate qualifications
Assembly specialist or persons
with appropriate qualifications
Note
The operator must ensure that the personnel have been instructed in the
operation and have understood the operating instructions. If anything is
unclear, please contact Walpol or our representatives.
2.2. Safety rules for working in and on electrical installations
. disconnect (disconnect all
poles of an electrical system
from live parts
. Secure against being switched
on again
. Check that no voltage is
present
. Earth and short-circuit
. Cover or isolate adjacent live
parts
• Disconnect the device from the power supply and secure it against being switched on again.
• Check that there is no voltage using a two-pole voltage tester.
• It is strictly forbidden to carry out work on parts that are live.
• Electrical connection only in accordance with the enclosed wiring diagrams
• Connect the unit only to a suitable base and only to firmly laid cables.
• The unit must be closed during operation.
3. Warranty
For warranty claims to be valid, the products must be properly connected and operated and used in accordance with the
data sheets.
4. Delivery, transport, storage
Delivery
Each speed controller leaves our factory in perfect electrical and mechanical condition. It is recommended that the speed
controller be transported to the installation site in its original packaging.
Check delivery
• Check the packaging for transport damage. Any damage must be noted in the cargo manifest.
• Check that the delivery is complete.
Unpacking
Warning
When removing the transport packaging, there is a risk of damage due to sharp edges, nails, staples, splinters, etc.
• Unpack the speed controller carefully.
• Check the speed controller for obvious transport damage.
• Do not remove the packaging until shortly before assembly.

5
Transport
Safety instructions
Warning: Electrical or mechanical hazard due to fire, moisture, short circuit or malfunction.
• In the case of open transport, ensure that no water can enter the speed controller.
• It is recommended that the speed controller be transported to the installation site in its original packaging.
Storage
• Store the speed controller in its original packaging in a dry, dust-free place protected from the weather.
• Avoid exposure to extreme heat or cold.
• Storage in the temperature range -5°C to +50°C
5. Description
5.1. Speed controller type WPO 55
• The potentiometer is designed to control devices that require a control signal (e.g. EC motors with 10V input)
• The individual stages can be set individually on the circuit board by means of a screwdriver on the adjusting screws.
• The desired speed can be set in 5 stages by means of a rotary knob.
• It has a switch (dry contact) for remote ON/OFF switching of external devices.
• The potentiometer is suitable for surface mounting (IP55).
Type Dimensions
(height x width x depth)
Weight
kg
WPO55 128x108x73 mm 0.37
• Power supply:  Vdc (+ %).
• Max. Voltage output  ...  V: .mA
• IP protection: IP
• Ambient temperature range: - ... . ° C
• Operating temperature range for storage: - ... . ° C
• Relative humidity: % Non-condensation
• Connector max. conductor cross-section: .mm²
5.2. Speed controller type WPO
• The potentiometer is designed to control devices that require a stepless control signal.
• The supply voltage is freely selectable in the range of 0-10 VDC.
• The desired output voltage is continuously adjustable between 0 and the supply voltage (Us) by means of a rotary knob.
• It has a switch (dry contact) for remote ON/OFF switching of external devices.
• The potentiometer is suitable for flush mounting (IP44) as well as surface mounting (IP54).
Type Dimensions
(height x width x depth)
Weight
kg
WPO 82 x 82 x 65 mm 0.2

6
• Power supply:  Vdc (+ %).
• Max. Voltage output  ...  V: .mA
• IP protection: IP/
• Ambient temperature range: - ... . ° C
• Operating temperature range for storage: - ... . ° C
• Relative humidity: % Non-condensation
• Connector max. conductor cross-section: .mm²
control the perfect speed switching, controls, sensors | S-72
04/03/2008
MTP010 | potentiometer
Potentiometer mounted in an IP44 splash water proof housing.
Can be used for inset mounting as well as for surface mounting.
Features
Switch rating: 4 A / 250 Vac - 10 A / 12 Vdc<
Resistance value: 10 KOhm<
Wiring diagram
Dimensions & fixing
65
24
82
82
62
62
weight
MTP010
145 gr
control the perfect speed switching, controls, sensors | S-72
04/03/2008
MTP010 | potentiometer
Potentiometer mounted in an IP44 splash water proof housing.
Can be used for inset mounting as well as for surface mounting.
Features
Switch rating: 4 A / 250 Vac - 10 A / 12 Vdc<
Resistance value: 10 KOhm<
Wiring diagram
Dimensions & fixing
65
24
82
82
62
62
weight
MTP010
145 gr
6. Installation
Note
This is not a ready-to-plug-in unit.
After installation as intended, this is a component in a system. The system as a whole must be installed in
accordance with the relevant regulations. The VDE and EVU regulations must be observed. If necessary, the
installer must coordinate the effect of this unit on the function of a ventilation and heating system with the system
planner and the system operator.
• The manufacturer reserves the right to make changes to the unit or documentation without prior notice, e.g. to im-
prove performance.
• The manufacturer is not liable for damage caused by misuse, improper use, incorrect use or as a result of unauthori-
sed repairs/changes.
• Check the surface for load-bearing capacity before installation.
• Take all static and dynamic loads into account.
• Connect the unit only to permanently laid cables.
• Electrical connection only in accordance with the currently valid VDE and EN guidelines as well as TAB's (Technical
Connection Conditions) of the regional power supply companies
• The controller is to be screwed to a flat surface (wall etc.) using threaded screws.
• Open the controller housing by loosening the screws of the cover incl. grommets.
• Pull the cables through the grommets.
• The connection must be carried out according to the wiring diagram.
• Before closing the cover, position the internal cables correctly.
General safety instructions
• The installation may only be carried out by appropriately qualified persons, for details, see Table 1 Qualification.
• Take into account the system-relevant conditions and requirements of the system manufacturer or system builder.
• Safety devices must not be dismantled, bypassed or rendered inoperative.
• There is a risk of electric shock when installing a live controller.
Prerequisites
• Make sure that the speed controller and all its
components are undamaged.
• Make sure that the data on the type plate (speed
controller and motor) correspond to the operating
conditions.
• Make sure that there is sufficient space for
mounting the speed controller.
• Mount the speed controller so that there is
sufficient access for troubleshooting, maintenance
and repair work.
• When mounting, protect the unit from dust and
moisture.

7
7. Electrical connection
Warnings:
• Before installing and plugging the controller into the mains, check that the technical characteristics explained in
these instructions also correspond to those of the electrical mains and voltage.
• Always use good quality and appropriate electrical cables to connect the controller to the mains and voltage.
• The electrical equipment must be checked regularly: Damaged wires and cables must be replaced immediately.
• Install the controller in ventilated places and away from heat sources, especially if the current load is near the maxi-
mum power.
• After removing the cover to fix it to the bracket, connect the cables to the terminal strip on the circuit board accor-
ding to the connection diagram.
• Then carefully close the cover again.
Warning
Danger from electrical voltage!
• The safety rules must be observed, see Safety rules for working in and on electrical installations
• Prevent water from entering the terminal box.
• The electrical connection may only be carried out by suitably qualified persons, for details see table Qualification
Regulations:
• Accident prevention regulations VGB, BGV A3, TRBS
• DIN VDE 0100, DIN VDE 0105
• EN 60730 (Part 1)
• Regulations (TAB's) of the local VNB
• As well as generally recognised rules of technology.
8. Connection diagram and function
8.1. Speed controller WPO 55 5-stage
Select output voltage via front knob:
Position 0 = 0 V
Position 1-5 = individual speeds
Jumper "LED" (J2)
With the jumper "LED" (J2) you can select whether the illumination of the LED is to be controlled via the
front knob or viah an external contact.
•Jumper J2 in position "INT": front knob in position "0", LED = OFF; front knob in position
"1-5", LED = ON.
•Jumper J2 on position "EXT": If the external contact with the terminals "LED" and "GND"
(terminal CN2) is closed, LED= ON. If the external contact is connected to the terminals
"LED" and "GND" (connector CN ") and is open, LED= OFF.
The LED can be controlled externally by a mechanical contact or also by an open collector
.

8
GND
+10VLED GND Vout GND
+10V GND
zum Motor
externer Kontakt
nur wirksam wenn Jumper J2 auf Position EXT ist
0-10V OUTPUT
Jumper LED (J2)
LED ist an, wenn extrener
Kontakt geschlossen ist.
EXT
J2
INT
EXT
J2
INT
LED ist an, wenn Speed 1bis 5
durch den Frontknopf gewählt wurde.
Potentialfreier Anschluss
(nur bei Bedarf)
Der über diese Klemmen angeschlossene Verbraucher z.B.
Signalleuchte braucht einen eigenen Netzanschluss mit
eigener Absicherung.
Trimmer Stellschrauben
zum individuellen Einstellen der Stufen 1-5
8.2. Speed controller WPO infinitely variable
Wiring diagram
3 = Us supply voltage (0-12 VDC)
4 = + output voltage (0)
5 = - ground
1,2 = Dry contact for remote ON/OFF connections
Cable cross-section: max. 2.5 mm2
control the perfect speed switching, controls, sensors | S-72
04/03/2008
MTP010 | potentiometer
Potentiometer mounted in an IP44 splash water proof housing.
Can be used for inset mounting as well as for surface mounting.
Features
Switch rating: 4 A / 250 Vac - 10 A / 12 Vdc<
Resistance value: 10 KOhm<
Wiring diagram
Dimensions & fixing
65
24
82
82
62
62
weight
MTP010
145 gr
9. Commissioning
Only if commissioning has been carried out correctly and written proof of this is provided, is the warranty
valid.
Safety instructions
Commissioning may only be carried out by appropriately qualified persons, for details, see table Qualification
Requirements

9
• Installation and electrical connection have been
completed properly.
• The cable glands have been tightened.
• Residual material from the installation and foreign
bodies have been removed from the speed gover-
nor and the ducts.
• The data on the type plate corresponds to the
connection data.
• Before switching on, check the speed governor for
visible damage and ensure that the protective
devices are functioning properly.
10. Disposal
• Ensure that the material is recycled. Observe the national regulations.
• The unit and the transport packaging consist mainly of recyclable raw materials.
11. Spare parts
• Only use original spare parts from Walpol!
• When ordering spare parts, state the serial number of the speed controller. This is indicated on the type plate.
12. EU Declaration of Conformity
The manufacturer: Walpol GmbH
Benzstr. 
 Gelsenkirchen
Product designation: Speed controller
Type designation: WPO
Serial number All Manufactured
From year of manufac-
ture: 
The manufacturer declares that the above-mentioned products in their design and construction as well as the version mar-
keted by
us comply with the harmonisation regulations listed below:

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Place: Gelsenkirchen
Date: 01.012.2021
Maximilian Girnus
Managing Director WALPOL GmbH