Seasonal Maintenance
Seasonal Checklist:
Fluid
- Check concentrations of glycol (see fluid chart below.)*
- Check fluid level, if applicable.
- Check that the reservoir and fluid are free of debris or contamination.
Refrigeration
- Ensure crankcase heaters are operating.*
- Check & clean condenser(s) and fan(s).
- Check compressor AMPs (compared to name plate.)
Piping
- Check the pump(s) for leaks.
- Check pump motor(s) AMPs (compared to name plate.)
- Look over piping for any cracks or leaks.*
Electrical
- Check that sealed electrical boxes are adequately sealed.
- For outdoor units, make sure Ebox heater is operating in order to keep components that need heat to run properly are protected.*
- Check compressor, pump and fan contactors (replace if needed.)
- Check fuses and replace as needed.
Filters
- Inspect, clean or replace.
Proper Flow & Pressure
- Most chillers are equipped with a pressure gauge.
If you have any questions about how to determine adequate flow and pressure, please call our Service Technicians at 800-968-5665 ext 500.
*These checks are especially important leading into the winter months to prevent freezing in your system.
Water/Glycol Mixtures
The location of the chiller and environmental concerns must be taken into account when selecting the proper mixture of glycol and water for the chiller process. A process which is located completely indoors and has no chance of freezing will require less glycol than a system located outdoors where low temperatures can cause the fluid to freeze and piping to burst. Applications that have a very low operating temperature (below 20°F) should use a glycol mixture equivalent to an outdoor system. After selecting the proper glycol and water types, use the following chart to determine the recommended mixture depending on application and location of the process. The glycol percentage figures in the chart below will apply to any brand of ethylene or propylene glycol.
| Application | Glycol % | Water % | Freeze Protection* | Burst Protection |
|---|---|---|---|---|
| Indoor Chiller and Process | 30 | 70 | 5°F / -15°C | -20°F / -29°C |
| Outdoor Chiller / Low Temp. System | 50 | 50 | -35°F / -37°C | -60°F / -60°C |