SKOV 31 Speed Controller

Product description

• DOL 31 is a single-phase triac speed controller for e.g. regulation of fans, stand-alone heating units or light.
• DOL 31 can with advantage be used in applications where a complete climate controller is not required.
• DOL 31 can be set to three different modes of operation:
• Automatic – Master mode in which the DOL 31 output is controlled on the basis of the ambient temperature.
• Each DOL 31 is supplied with one DOL 12 temperature sensor.
• Automatic – Slave mode in which the DOL 31 output is controlled by a 0-10 V input signal.
• Manual control in which the DOL 31 output is set manually by means of the keyboard on the front.
• In addition, DOL 31 has an alarm relay (max. 24 V, 1A), and 1 control relay (max. 230 V, 12 A). The control relay could for instance be used for turning a heat or cooling source on and off.
• DOL 31 speed controller is available in a 6.8 A and a 16 A version.

DOL 31 Automatic – Master mode
Temperature-controlled by means of a DOL 12 temperature sensor.

DOL 31 Automatic – Slave mode
Controlled by a 0-10 V input signal.

DOL 31 manual control

Product survey

130171 DOL 31 speed controller 6.8 A

• 0-10 V input or DOL 12 input (1)
• 0-10 V output (1)
• 60-230 V output (1)
• 24 V output (1)
• 24 V alarm relay (1)
• 230 V control relay (1)

Supplied with:
1 DOL 12 temperature sensor, 3 plastic glands M25 and 3 plastic nuts M25.

130172 DOL 31 speed controller 16 A

• 0-10 V input or DOL 12 input (1)
• 0-10 V output (1)
• 60-230 V output (1)
• 24 V output (1)
• 24 V alarm relay (1)
• 230 V control relay (1)

Supplied with:
1 DOL 12 temperature sensor, 3 plastic glands M25 and 3 plastic nuts M25.

Mounting guide

Recommended tools
Below follows a list of tools recommended for installation of the DOL 31.

Mounting of DOL 31 speed controller

1. Remove the front panel and the flat cable plug (A).
2. Knock out the required number of knock-out pieces (B) at the bottom of the cabinet and mount the plasticglands.
3. Prick/drill holes for the 4 screws (C) in the bottom section of the cabinet.
4. Remember free space around the cabinet:
   • 10 cm (D) on the right side for operation of the AUT–0–MAN (Auto/Manual) change-over switches.
   • 27 cm (E) above the cabinet so that the front panel can be placed here during service.
   • 10 cm (F) below the cabinet to enable air cooling.
5. Align the box horizontally. Hold the cabinet base against the wall and mark out the 4 screws.
6. Drill 4 8 mm holes.
7. Mount the cabinet using the enclosed wall dowels and screws.
8. Place one or more washer(s) under one of the cabinet feet if the wall is not level and the cabinet base moves.

Installation guide

Installation, servicing and troubleshooting of all electrical equipment must be carried out by qualified personnel in compliance with the applicable national and international standard EN 60204-1 and any other EU standards that are applicable in Europe. The installation of a power supply isolator is required for each motor and power supply to facilitate voltage-free work on the electrical equipment. The power supply isolator is not included.

Cabling
Cables are led through plastic glands in the bottom section. It is recommended to use armored cable in locations where there is a risk of rodent attacks.

Dismantling the AUT-0-MAN switch in DOL 31 16 A

• Disconnect the supply voltage.
• Dismantle the AUT-0-MAN switch in order to gain access to the screw terminals.
• Turn the lock in the opposite direction of the arrow.
• Set the switch to 0.
• Dismantle the AUT-0-MAN switch by means of a screwdriver. Push the switch housing to the left.
• Lift out the switch.
• Connect power supply in X13-X15.
• 
• Set the switch to 0.
• Push the AUT-0-MAN switch to the right.
• Turn the lock. The arrow indicates the direction.Connect output in X16-X18.

Connection in DOL 31

Cable plans and circuit diagrams

General information about circuit diagrams
Symbols are in accordance with the IEC/EN 60617 standard.
The classification of the symbols (“letter codes”) on the symbols is in accordance with the IEC/EN 81346-2 standard. Reference designations are in accordance with IEC/EN 81346-1:2001 structuring principles and reference designations. This standard indicates structured methods for naming electrotechnical systems.

Color code

Power supply isolator

Letter code
The letter codes used in accordance with standard IEC/EN61346-2.

Cable plan controller DOL 31

Circuit diagram controller to DOL 31

Cable plan DOL 31 Master and Slave

Circuit diagram DOL 31 Master and Slave

User guide

Operation

Alarm lamp
The alarm lamp is on when:

• DOL 12 temperature sensor is disconnected
• Short-circuited DOL 12 temperature sensor
• Low temperature alarm
• High temperature alarm

Display

AUT-0-MAN switch

• AUT (I): Auto (DOL 31 runs in the current user mode).
• 0: Service mode (outputs are dead).
• MAN (II): 100 % (phase directly to output).

Keyboard

• Up, down, right, left keys: The arrow keys are used for navigation and changing of data and values.
  • < 0.5 sec. By pressing you change the value by one either a menu or data.
  • > 0.5 sec. Pressing quickly changes the value/the menu.
• Return key
  • Return is used for: Returning to previous level or function. Data remains unchanged.
• OK key
  • OK is used for: Selecting function. Confirming and saving data.

Menu Survey

Menu mode
Set DOL 31 to the required mode. (Automatic Master/Slave and Manual).
Automatic – Master mode
It is controlled by a signal from the temperature sensor. DOL 31 automatically adjusts according to the set temperature.

Set temperature
Set required temperature. DOL 31 automatically adjusts according to the set temperature.

Automatic Slave mode
DOL 31 is controlled by the controller or a master DOL 31. No setting of temperature.

Manual mode
Manual control of output.

Set output
DOL 31 is manually controlled. Direct control of the output by pressing the up or down key. Output can be set to 0 to 100 %. Min. and max. output are left out of account.
NOTE: Please note that certain fans require a minimum voltage.

Minimum regulation of AC output

• Setting minimum power on output. The setting is made as a percentage of the supply voltage. Control of the output by pressing the up or down key. Min. setting (0-50 %) cannot exceed 50 %.
• For use with e.g. heating control:
• Set minimum output to 0%. DOL 31 will then turn off the output, if there is no need for adjustment.
• For Automatic Slave mode, see section Set turn off limit [} 25].
  • NOTE: Please note that certain fans require a minimum voltage.

Minimum regulation of AC output

• Setting maximum power on output. The setting is made as a percentage of the supply voltage.
• Control of the output by pressing the up or down key. Min. setting (50 – 100 %) cannot be set higher than 50 %.

Example:

• Set minimum output = 0 %
• Triac output = 0 V
• Set minimum output = 1 %
• Triac output = 60 V

Service menu

Settings of service menus.

Active Alarms
Displays the active alarms.

Set temperature alarm

• Temperature offset is set to activate alarm relay and alarm lamp. Alarm is released in case of high and low temperature.
• The function is only active in Automatic master mode.

Example:

• Alarm offset is a relative temperature compared to the set temperature.
• Required temperature = 20 °C
• Set temperature alarm = ±4 °C
• The alarm is activated by the temperature.
  • >24 °C
  • <16 °C

Set control temperature

• Set temperature for activation of the control relay. The function is only active in Automatic master mode.
• Negative offset value can be used for turning the heating system on/off.
• Positive offset value can be used for extra cooling.
• DOL 31 has a 0.5 °C hysteresis.
• This means that the control relay in the below example is deactivated again when the temperature increase to 12.5 °C.
  • 1 = Active control relay
  • 0 = Not active control relay

Example:

• Control offset is a relative temperature compared to the set temperature.
• Required temperature = 20 °C
• Set control offset = -8 °C
• The control relay is activated by the temperature. 12 °C

Set P band

• Set the temperature regulation range between min. and max. output.

Example:

• Required temperature = 20 °C
• Set P band = 4 °C
• Output min. = 20 °C
• Output max. = 24 °C

Set mininmum analog DC output
Setting minimum analog output.

Set maximum analog DC output
Setting maximum analog output.

The analog output follows the calculated ventilation percentage.

Example:

• DC/MIN = 0 V
• DC/MAX = 10 V

Selecting temperature scale
Select whether the temperature scale indication should be in Celsius or Fahrenheit.

Invert
When using DOL 31 for heating or recirculation, the output can be inverted.

Turn off functions
NOTE: These safety functions are only active when DOL 31 runs in Automatic slave mode. DOL 31 can be configured with 2 different safety functions, which ensure a certain mode of operation in case of e.g. malfunction in the controlling climate system.

1. Safety mode ensures that the DOL 31 output is set to 50 % if the analog input signal gets lower than 0.5 V.
2. Turn off limit: If safety mode is not selected, it is possible to select a turn off limit. When this function is chosen, the DOL 31 output will be switched off if the analogue input signal is lower than this turn off limit. See section Set turn off limit [} 25].

This means that it is not possible to have both turn off mode and turn off limit activated at the same time.

See also
2 Turn off [} 24]

Turn off
NOTE: The function is only active in Automatic Slave mode. This function can be applied in installations in which security against e.g. ventilation failure is required even though a fault is located on the overhead climate system. If the analog input signal ceases, the output is set to 50% and after 30 seconds the alarm is activated.

Not inverted
If the analog control signal reaches a level lower than 0.5 V.

Inverted
If the analog control signal exceeds 9.5 V.

Set turn off limit

• NOTE: The function is only active in Automatic Slave mode.
• The function is applied if there is a requirement for the DOL 31 output to be cut off completely at a certain voltage on the analog control signal (turn off limit).
• If the turn off limit is set to 0 V, the function is inactive and the DOL 31 output will remain at minimum (not inverted) or maximum (inverted).

Contrast
Adjust contrast in display.

Backlight
Adjust backlight.

Language
Choose between Danish, English, German, Finnish, Swedish, Polish, Russian, Estonian, and Spanish.

Version Information
Information about hardware configuration and software version.

Settings

Factory settings
DOL 31 has following default setup.

Depending on the actual supply voltage.
Functions in menu mode

Table relating to DOL 12 temperature sensor control

Replacing Triac
When the DOL 31 is used for light control with incandescent bulbs, the bulbs can short-circuit when failing, causing the triac to break.

1. Order 130828 DOL 31 – 5 pcs. all-purpose triac, consisting of 5 individual triacs in a bag.
2. Disconnect the supply voltage to DOL 31.
3. Remove the defective triac.
4. Mount the new triac from the bag, tighten the screw and the terminal block well.
5. Reconnect the supply voltage.
6. Check that the light can once again be regulated up/down.

Maintenance

Cleaning
Clean the product with a cloth that has been wrung out almost dry in water and avoid using:

• high-pressure cleaner
• solvents
• corrosive/caustic agents

Recycling/Disposal
Products suitable for recycling are marked with a pictogram. It must be possible for customers to deliver the products to local collection sites/recycling stations in accordance with local instructions. The recycling station will then arrange for further transport to a certified plant for reuse, recovery and recycling.

Troubleshooting instructions

Technical data

Product and Documentation Changes

• SKOV A/S reserves the right to change this document and the product herein described without further notice.
• In case of doubt, please contact SKOV A/S.
• The date of change appears on the front and back pages.

Note

• All rights belong to SKOV A/S. No part of this manual may be reproduced in any manner whatsoever without the expressed written permission of SKOV A/S in each case.
• All reasonable efforts have been made to ensure the accuracy of the information contained in this manual.  Should any mistakes or imprecise information occur in spite of this, SKOV A/S would appreciate being notified thereof.
• Irrespective of the above, SKOV A/S shall not accept any liability with regard to loss or damage caused or alleged to be caused by reliance on any information contained herein.
• Copyright by SKOV A/S.

CONTACT

• SKOV A/S
• Hedelund 4
• Glyngøre
• DK-7870 Roslev
• Tel. +45 72 17 55 55
• www.skov.com.
• E-mail: skov@skov.dk.

Documents / Resources

SKOV 31 Speed Controller [pdf] User Guide 31 Speed Controller, 31, Speed Controller, Controller

References

• User Manual