QDC300 - Door closer Dormakaba - Free user manual and instructions
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| Product Type | Door closer |
| Brand | Dormakaba |
| Model | QDC300 |
| Installation Type | Surface-mounted |
| Closing Force | Adjustable, EN 2-5 |
| Max Door Width | 1100 mm |
| Max Door Weight | 120 kg |
| Closing Speed | Adjustable |
| Latching Action | Adjustable |
| Backcheck | Adjustable |
| Opening Damping | Yes |
| Material | Aluminium alloy |
| Hydraulic Fluid | Sealed oil unit |
| Dimensions | 256 × 48 × 78 mm |
| Weight | 3.4 kg |
| Operating Temperature | -20 °C to +50 °C |
| Finish | Silver (RAL 9016 optional) |
| Mounting Options | Door frame or door leaf |
| Standards | EN 1154 |
| Warranty | 5 years |
Frequently Asked Questions - QDC300 Dormakaba
What is the maximum door width for the Dormakaba QDC300?
The Dormakaba QDC300 is designed for doors up to 1100 mm in width. For heavier or wider doors, consider a model with higher closing force.
How do I adjust the closing speed?
Use the closing speed valve usually located on the front of the closer. Turning it clockwise slows the door; counterclockwise speeds it up. Make small adjustments and test the operation.
Can the backcheck function be adjusted?
Yes, the backcheck valve controls the resistance when the door is opened forcefully. Adjust it to prevent the door from hitting the wall or furniture. Refer to the manual for the exact valve position.
How should I maintain the door closer?
Regularly clean the exposed surfaces with a damp cloth and check the mounting screws for tightness. The hydraulic system is sealed and requires no oil top-ups under normal use.
What types of doors is this closer suitable for?
The QDC300 is suitable for single-action doors in commercial and residential buildings. It works with both wooden and metal doors, provided the door width and weight are within limits.
Does the QDC300 require electrical power?
No, the QDC300 is a mechanical hydraulic door closer and operates without electricity. This makes it reliable and easy to retrofit.
How do I install the closer correctly?
Install using the template provided in the manual. Mark the holes, fix the closer body to the door or frame, and mount the arm. Ensure the spindle is correctly aligned with the hinge side.
What standards does the QDC300 comply with?
The QDC300 meets the requirements of EN 1154 for controlled door closing devices. It is also CE marked and tested according to European standards.
How do I choose the correct closing force?
Select the closing force based on the door size and weight. The QDC300 has multiple EN power sizes (2-5) and is adjustable. Use the scale on the closer body to set the force that matches your door.
Are spare parts available for the QDC300?
Yes, Dormakaba offers a full range of spare parts such as valves, springs, and arm assemblies. Contact your local distributor or Dormakaba service for the part list.
User questions about QDC300 Dormakaba
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USER MANUAL QDC300 Dormakaba
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Product information
Brand : Dormakaba
Model : QDC300
Category : Door closer