Carrier GW Series Installation Instructions Manual

Contents

12INITIAL START--UPCAUTION!UNIT DAMAGE AND/OR OPERATION HAZARDFailure to follow this caution may result in unit damageand/or improper equipment operation.Make sure all valves in heat recovery water piping systemare open. NEVER OPERATE HR PUMP DRY.1. Turn on the heat pump. The HR pump should not run if thecompressor is not running.2. Turn HR switch to the “ON” position. The pump willoperate if entering water temperature to HR is below 120_F.3. The temperature difference between the water entering andleaving the heat recovery should be 5_F to 15_F.4. Allow the unit to operate for 20 to 30 minutes to ensure it isfunctioning properly. The pump should shut off when thewater temperature entering the heat recovery reaches 120_F.SYSTEM CHECKOUTAfter completing the installation, and before energizing the unit,the following system checks should be made:1. Verify that the supply voltage to the heat pump is in accor-dance with the nameplate ratings.2. Make sure that all electrical connections are tight and se-cure.3. Check the electrical fusing and wiring for the correct size.! WARNINGELECTRICAL SHOCK HAZARDFailure to follow this warning could result in personalinjury or death.Ensure cabinet and electrical box are properly grounded4. Verify that the low voltage wiring between the thermostatand the unit is correct.5. Verify that the water piping is complete and correct.6. Check that the water flow is correct, and adjust if necessary.7. Check the blower for free rotation, and that it is secured tothe shaft.8. Verify that vibration isolation has been provided.9. Verify that the unit is serviceable. Be certain that all accesspanels are secured in place.UNIT START--UPNOTE: A unit Start--Up checklist is included in the unit packet.Complete the Checklist and place it in the customer file at yourdealership.1. Open all water valves to the full open position.2. Turn on line power to the heat pump.3. Set the mode on the system control to “HEAT”. Adjust theaquastat to its lowest setting.4. Slowly increase the aquastat set temperature until thecompressor turns on.5. After a few minutes, check for warm delivery temperatureon the load side piping exiting the unit.6. Verify water flow.7. Check for leaks.8. Check for excessive noise and vibration.9. Check the temperature of EWT and LWT. Compare totables in Product Data sheets to confirm unit is meetingheating specification. If unit is not achieving performancelisted, check refrigerant pressures and compare them to tableon page 13 before proceeding.10. Once heating performance is verified, place system controlto “COOL” mode. Adjust aquastat to its highest setting.11. Slowly decrease the aquastat setting until the compressorturns on.12. After a few minutes, check for cool delivery temperature onthe load side piping exiting the unit.13. Check the temperature of EWT and LWT. Compare totables in Product Data sheets to confirm unit is meetingcooling specification. If unit is not achieving performancelisted, check refrigerant pressures and compare them to tableon page 13 before proceeding.14. If unit fails to operate properly, refer to the Troubleshootingsection beginning on page 14.15. Once proper cooling and heating performance has beenconfirmed, adjust control to desired setting.