Mainly care needs to be taken not to damage the valves on the condenser, which can become damaged from heat when soldering in a new drier.
When brazing torches are used for soldering in place the new component, the heat can damage the valves.
The Schrader valves will need to be removed since they have a rubber gasket that can become damaged from the heat.
The goal will be to protect the valve from heat. Also, the faster you can solder in the drier, the better.
The drier is placed on the high-pressure line between the evaporator and the condenser.
A new filter drier should be installed any time the system has been opened.
Most filter driers are placed outside near the condenser but can also be near the evaporator.
Types of HVAC Filter Drier’s
There are differently sized to match the size f the HVAC system.
If you are installing a new condensing unit, they usually will come with the correct drier to install.
There is also a standard A/C only filter drier and a heat pump reversible drier.
No refrigerant should be in the line-set when installing a filter drier. The system should be pumped down, or the refrigerant has been recovered.
How To Replace an HVAC Filter Drier on a Condenser
- Remove the Schrader Valve on the high-side of the condensing unit.
- Remove the Schrader Valve on the low-side of the condensing unit.
- Spray heat absorbing protection on the valves or otherwise.
- Remove the old filter drier or cut an opening on the low pressure line if there isn’t one.
- Clean the tips of both cut ends to get a good soldering connection.
- Place the new drier in place.
- Using a torch, braze the connections.
- Once the lines cool down, reinstall the Schrader Valves.
Installing a new filter drier is not difficult as long as the proper procedures are followed.
The drier can be located anywhere between the condenser and evaporator but usually near the condenser.
When replacing it near the condenser, care must be taken not to damage the valves.
Removing the valve cores and using a heat-resistant spray on the casing is a good way to prevent damage.
When installing an A/C-only unit, the drier will have one arrow that is pointed away from the condenser toward the evaporator.
Have you installed an HVAC drier on a condenser? Let us know your thoughts below.