Carrier 50YFV Installation, Operation And Maintenance Instructions

Contents

Carrier 50YFV Installation, Operation And Maintenance Instructions Manual pdf 40 page image

R e s i d e n t i a l D i g i t a l P a c k a g e d U n i t s G T- P B S e r i e s - 6 0 H z P u r o n ®R e v : 4 A p r i l , 1 440Unit Start-Up ProcedureSERVICE MODEMANUAL OPERATIONCONTROL DIAGNOSTICSDIPSWITCH CONFIGFAULT HISTORYCLEAR FAULT HISTORYSELECT OPTIONPREVIOUS SELECTMANUAL OPERATING MODEY1 COMM OUTPUT OFFY2 COMM OUTPUT OFFW COMM OUTPUT OFFO COMM OUTPUT OFFG COMM OUTPUT OFFH COMM OUTPUT OFFDH COMM OUTPUT OFFECM AIRFLOW 0PUMP SPEED 0%TEST MODE OFFSELECT OPTIONPREVIOUS SELECT9 - 1220 - 264 - 810 - 17b. Check for cool air delivery at the unit grille within afew minutes after the unit has begun to operate.NOTE: Units have a five minute time delay in the controlcircuit that can be bypassed on the DXM2 control boardby placing the unit in the “Test” mode as shown in the unitIOM. Check for normal air temperature drop of 15°F to 25°F(cooling mode).c. Verify that the compressor is on and that the watertemperature rise (cooling mode) is within normalrange.d. Check the elevation and cleanliness of thecondensate lines. Dripping may be a sign of ablocked line. Check that the condensate trap is filledto provide a water seal.e. Turn thermostat to “OFF” position. A hissing noiseindicates proper functioning of the reversing valve.7. Allow five (5) minutes between tests for pressure toequalize before beginning heating test.a. Go into Manual Mode activate Y1, and Y2 forHeating. Also manually increase CFM until desiredheating CFM is achieved. Next adjust pump speed% until desired loop temperature difference (enteringwater temperature minus leaving water temperature)is achieved. (For modulating valve adjust valve %).b. Check for warm air delivery at the unit grille within afew minutes after the unit has begun to operate.NOTE: Units have a five minute time delay in the controlcircuit that can be bypassed on the DXM2 control boardby placing the unit in the “Test” mode as shown in the unitIOM. Check for normal air temperature rise of 20°F to 30°F(heating mode).c. Verify that the compressor is on and that the watertemperature fall (heating mode) is within normalrange.e. Check for vibration, noise, and water leaks.8. If unit fails to operate properly, perform troubleshootinganalysis (see troubleshooting section in the unit IOM).If the check described fails to reveal the problem andthe unit still does not operate, contact a trained servicetechnician to insure proper diagnosis and repair of theequipment.9. When testing is complete, exit the Installer Menu and setthermostat to maintain desired comfort level for normaloperation.10. BE CERTAIN TO FILL OUT AND RETURN ALLWARRANTY REGISTRATION PAPERWORK.Unit performance may be verified by calculating the unitheat of rejection and heat of extraction. Heat of Rejection(HR) can be calculated and compared to the performancedata pages in this IOM. The formula for HR is as follows:HR = TD x GPM x 500 (or 485 for anti-freeze solutions),where TD is the temperature difference between the enteringand leaving water, and GPM is the flow rate in U.S. GPMdetermined by comparing the unit heat exchanger pressuredrop to Table 13.Heat of Extraction (HE) can also be calculated and comparedto the performance data pages in this IOM. The formula forHE is as follows: HE = TD x GPM x 500 (or 485 for anti-freeze solutions), where TD is the temperature differencebetween the entering and leaving water, and GPM is the flowrate in U.S. GPM determined by comparing the unit heatexchanger pressure drop to Table 13.