HVAC / Refrigeration Components
User Manual for Danfoss DML/DCL Filter Drier
Quick guide for the Danfoss DML/DCL Filter Drier. Includes essential installation safety, soldering techniques, pressure specifications, and system marking requirements.
Table of contents
Manual images
Click an image to enlargeQuick guide from the manual
This document provides essential installation and safety instructions for the Danfoss DML/DCL Filter Drier. The most critical safety requirement is to perform soldering only in well-ventilated areas and to avoid overheating the filter body, which can release toxic fumes. Always verify that the maximum working pressure of the filter meets the requirements of your specific system according to ANSI/ASHRAE 15.
Installation and Soldering
Proper soldering technique is vital to prevent damage to the filter and ensure safety:
- Ventilation: Always solder in a well-ventilated area to avoid inhaling toxic fumes.
- Flame Direction: When applying heat, point the flame away from the Filter Drier body. Apply heat only to the connection.
- Overheating: Excess heating of the paint on the filter can cause the release of toxic fumes, which may cause skin and eye irritation or internal organ damage.
- Wet Wrap: For pure copper connectors, always wrap the connector with a wet cloth during the soldering process to prevent overheating.
Pressure Specifications
The maximum working pressure (PB/MWP) varies depending on the connection size. Ensure your system design does not exceed these limits:
- 1/4", 5/16", 1/2", 5/8" connections: 610 psig / 42 bar
- 3/4", 7/8" connections: 507 psig / 35 bar
- 1 1/8" connections: 435 psig / 30 bar
System Marking
After the installation and charging process is complete, the system must be clearly marked to indicate the type of refrigerant and oil used. This is a mandatory safety and maintenance requirement.
Manufacturer information
Danfoss A/S
Practical help
Common problems
Toxic fumes during soldering
Ensure the area is well-ventilated and avoid overheating the filter paint by directing the flame away from the filter body.
Overheating pure copper connectors
Always wrap the connector with a wet cloth (wet wrap) during the soldering process.
Before use
- Verify that the filter's maximum working pressure meets the requirements outlined in ANSI/ASHRAE 15 for your specific refrigerant.
- Ensure the workspace is well-ventilated.
- Prepare a wet cloth for wrapping pure copper connectors.
- Confirm the connection size to identify the correct pressure limit.
Specs in practice
- Max working pressure (PB/MWP)
- The maximum pressure the filter can safely withstand, which varies by connection size (435 to 610 psig).
Images and diagrams
- Soldering technique: Shows the correct way to apply heat to the connection while keeping the flame pointed away from the filter body.
- Wet wrap: Illustrates the application of a wet cloth around the connector to prevent heat transfer to the filter body.
Model compatibility
- DML models are compatible with R134a, R404A, R407C, R410A, R507, R22, and others.
- DCL models are compatible with R12, R22, R502, and others.
Manual page author
David Miller
Documentation analyst
Organizes user manual content into clear summaries, with attention to model details, product context, and everyday usability.