Install Manual

13.0 Recommended Geocool Start-Up Procedure
13.1 Startup Checklist
Verify the following items are addressed before starting the unit:
• If closed loop system, loop and unit are purged of air and all valves are open.
• Ensure a minimum of 20% methanol or 25% Propylene glycol is purged into the loop and
properly mixed.
• Ensure all piping is verified to provide designed flow rate and all valves are open.
• If open loop system, well has pressure (25 PSI – 50 PSI) and all valves are open.
• All air is purged from hot water loop lines and all valves are open.
• All supply grills are installed and unrestricted.
• Return duct and grills are installed and unrestricted with filter installed.
• All service panels to air chamber are closed and secured.
• Supply voltage is correct and matches nameplate.
• Fuses, breakers, and wire sizes are correct.
• Low voltage wiring complete including all thermostats.
• Unit is level for proper condensate drainage
• Service / Access panels are in place with proper clearance to allow service to front and sides
of unit.
13.2 Start Unit
• Reinstall all panels.
• Turn on the main power.
• Adjust thermostat up or down to bring system on. You may experience a time delay up to 5
minutes.
• Check to ensure blower is running.
• Check to ensure compressor is running.
• Check for proper water flow.
• Check hot water loop for water circulation if applicable.
• Set thermostat to desired temperature.
• If well water system, water flow should typically be 2 GPM to 3 GPM per ton.
• If closed loop system, check the temperature of the water in and out. This normally should not
exceed a 10°F to 12 °F difference in temperature.
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13.3 Refrigerant System
To maintain sealed circuit integrity, do not install service gauges unless unit operation appears
abnormal. Compare the change in temperature on the air side, as well as the water side, to the
Operating Parameters tables found in section 17.0 (Page 32). If the unit’s performance is not
within the ranges listed, and the airflow and water flow are known to be correct, gauges should
then be installed (only by a qualified technician) and superheat and subcooling numbers
calculated. If superheat and sub-cooling are outside recommended ranges, an adjustment to
the refrigerant charge may be necessary to optimize operating performance and efficiency.