Odyssey Water Dripping from Evaporator Coil
Below is a checklist for troubleshooting the potential cause of condensation issues with Odyssey air handlers.
The TWE126/150 and TWE156/180 models require a change to the coil orientation, see below for details.
For Odyssey air handler’s experiencing “wet filters” / water dripping off of the coil before it gets to the drain pan.
- Verify air flow is between 320 CFM to 480 CFM per ton.
- Verify the correct refrigerant charge.
- Check for a “dry/restricted” refrigerant circuit (frost test method - run the unit for a few minutes without airflow and watch for an even frost pattern).
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Sometimes extending the run time of the indoor blower for an additional 60-120 seconds after the compressor cycles off corrects the condensate issue.
- Some digital thermostats have this option or a field-supplied fan delay could be added.
- Clean the evaporator coil. (Sometimes the manufacturing process oils are not completely removed from the coil).
- Verify that the correct condensate drain trap is installed. See IOM for more details the air handler is leveled correctly.
- Verify the air handler is leveled correctly
- Inspect the drain pan.
- Verify evaporator coil orientation is correct (applies only to TWE126/150 and TWE156/180 when positioned for vertical up flow) See IOM for more details.
In some applications where there is high humidity or a lot of outside air brought into the unit, a drip kit could be installed to divert the condensate to the drain pan. The drip kit installation guide is attached. The kits should be ordered through Trane Parts, if needed.
Below is an image of an installed drip kit:
Also recommended in the Air Handler IOM:
For air handler’s experiencing air bypass
If the water in the unit appears to be due to the cause of air bypass and the airflow is within the correct parameters, the recommended field fix for this issue is to add Sikaflex where the block off meets the base on both sides of the coil. See the picture below for recommended location. Also, verify that all drain holes near the base of the coil in the flange are clear. The purpose of adding the Sikaflex sealant is to minimize the condensate that drains down the fins of the coil from entering the "u-bend" section and to stop the bypass air from propelling any condensate that accumulates in the "u-bend" section.
From HUB DOC-77075:
In order to provide air and water sealing on internal or external panels, the factory has used a sealing material known as Sikaflex 221 and in many applications, it works better than silicone. It is a good waterproof sealer for repairing holes drilled into the cabinet or base.
You can order this through your local service parts. The part number is SEL00439.
Specifications:
Packaging - Disposable 10.3 Fl-oz, moisture-proof aluminum cartridges, 12/case
Color - Aluminum Grey
Shelf Life - 12 months
Weight/Gallon - 10.3 lb/gas
Application Temperature - 40ºF to 100ºF
Service Range - -25ºF (-32ºC) to 180ºF (82ºC)
Manufacturer:
Sika Corporation
875 Alley Brook Ave
Lyndhurst, NJ 07071
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WARNING:
Information in this article is intended for use by individuals possessing adequate backgrounds of electrical and mechanical experience and who comply with all federal, state, and local laws, rules, orders, or regulations related to the installation, service, or repair of a heating or central air conditioning product. Any attempt to install, service, or repair a heating or central air conditioning product may result in personal injury and/or property damage. The manufacturer or seller cannot be responsible for the interpretation of the information contained herein, nor can it assume any liability in connection with its use.