Geostar ASTON Series Installation Manual
Also see for ASTON SERIES: Installation manualManualInstallation manualInstallation manualInstallation manual
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Contents
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29Unit StartupBefore Powering Unit, Check the Following:NOTE: Remove and discard the compressor hold down shippingbolt located at the front of the compressor mounting bracket.• High voltage is correct and matches nameplate.• Fuses, breakers and wire size correct.• Low voltage wiring complete.• Piping completed and water system cleaned and flushed.• Air is purged from closed loop system.• Isolation valves are open, water control valves or looppumps wired.• Condensate line open and correctly pitched.• Transformer switched to 208V if applicable.• Dip switches are set correctly.• Blower rotates freely.• Blower speed is correct.• Air filter/cleaner is clean and in position.• Service/access panels are in place.• Return air temperature is between 50-80°F heating and60-95°F cooling.• Check air coil cleanliness to ensure optimum performance.Clean as needed according to maintenance guidelines. Toobtain maximum performance the air coil should be cleanedbefore startup. A 10% solution of dishwasher detergent andwater is recommended for both sides of coil, a thorough waterrinse should follow.Startup StepsNOTE: Complete the Equipment Start-Up/Commissioning CheckSheet during this procedure. Refer to thermostat operatinginstructions and complete the startup procedure. Verify that thecompressor shipping bolt has been removed.1. Initiate a control signal to energize the blower motor.2. Initiate a control signal to place the unit in the cooling mode.Cooling setpoint must be set below room temperature.3. First stage cooling will energize after a time delay.4. Be sure that the compressor and water control valve or looppump(s) are activated.5. Verify that the water flow rate is correct by measuring thepressure drop through the heat exchanger using the P/T plugsand comparing to unit performance data in catalog.6. Check the temperature of both the supply and discharge water(see the Unit Operating Parameters tables).7. Check for an air temperature drop of 15°F to 25°F acrossthe air coil, depending on the fan speed and enteringwater temperature.8. Decrease the cooling set point several degrees and verify high-speed blower operation.9. Adjust the cooling setpoint above the room temperatureand verify that the compressor and water valve or looppumps deactivate.10. Initiate a control signal to place the unit in the heating mode.Heating set point must be set above room temperature.11. First stage heating will energize after a time delay.12. Check the temperature of both the supply and discharge water(see the Unit Operating Parameters tables).13. Check for an air temperature rise of 12°F to 35°F across the aircoil, depending on the fan speed and enteringwater temperature.14. If auxiliary electric heaters are installed, increase the heatingsetpoint until the electric heat banks are sequenced on. Allstages of the auxiliary heater should be sequenced on when thethermostat is in the Emergency Heat mode. Check amperage ofeach element.15. Adjust the heating setpoint below room temperature and verifythat the compressor and water valve or loop pumps deactivate.16. During all testing, check for excessive vibration, noise or waterleaks. Correct or repair as required.17. Set system to desired normal operating mode and settemperature to maintain desired comfort level.18. Instruct the owner/operator in the proper operation of thethermostat and system maintenance.NOTE: Be certain to fill out and forward all warrantyregistration papers.ASTON DUAL-CAPACITY OUTDOOR SPLIT SERIES INSTALLATION MANUAL |
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