Carrier AQUAZONE 50PEC09-18 Installation, Start-up And Service Instructions Manual

Also see for 50PEC09-18 Aquazone: Installation, Start-Up and Service Instructions Product data Product data Installation, Start-Up and Service Instructions Installation, Start-Up and Service Instructions

47Checking System Charge — Units are shipped withfull operating charge. If recharging is necessary:1. Insert thermometer bulb in insulating rubber sleeve onliquid line near filter drier. Use a digital thermometer forall temperature measurements. DO NOT use a mercuryor dial-type thermometer.2. Connect pressure gage to discharge line near compressor.3. After unit conditions have stabilized, read head pressureon discharge line gage.NOTE: Operate unit a minimum of 15 minutes beforechecking charge. From standard field-supplied Pressure-Temperature chart for R-410A, find equivalent saturatedcondensing temperature.4. Read liquid line temperature on thermometer, thensubtract from bubble point temperature. The differenceequals subcooling temperature.Refrigerant ChargingNOTE: Do not vent or depressurize unit refrigerant to atmo-sphere. Remove and recover refrigerant following acceptedpractices.Air Coil Fan Motor RemovalMotor power wires need to be disconnected from motorterminals before motor is removed from unit.1. Shut off unit main power supply.2. Loosen bolts on mounting bracket so that fan belt can beremoved.3. Loosen and remove the 2 motor mounting bracket boltson left side of bracket.4. Slide motor/bracket assembly to extreme right and lift outthrough space between fan scroll and side frame. Restmotor on a high platform such as a step ladder. Do notallow motor to hang by its power wires.Replacing the WSHP Open Controller’s Bat-tery — The WSHP Open controller’s 10-year lithiumCR2032 battery provides a minimum of 10,000 hours of dataretention during power outages.NOTE: Power must be ON to the WSHP Open controllerwhen replacing the battery, or the date, time and trend data willbe lost.1. Remove the battery from the controller, making note ofthe battery's polarity.2. Insert the new battery, matching the battery's polaritywith the polarity indicated on the WSHP Open controller.TROUBLESHOOTINGWhen troubleshooting problems with a WSHP, consider thefollowing and refer to Table 18.Thermistor — A thermistor may be required for single-phase units where starting the unit is a problem due to lowvoltage.WSHP Open Controller — With the WSHP Open con-troller option, the 100 most recent alarms can be viewed usingthe BACview6 alarm status and alarm history.To view the alarms:1. Navigate to the Alarm Status screen from the Homescreen using the arrow softkeys. The screen will displaythe current alarm status, either normal or Alarm, and al-low for scrolling through the unit’s alarm status.2. From the Alarm Status screen, press the Alarm softkey toview the 100 most recent alarms which are labeled withdate and time for easy reference.NOTE: Active faults can be viewed by scrolling down,these faults indicate a possible bad sensor or some condi-tion which may not merit an alarm.3. To view alarms which have been corrected, scroll downthrough the Alarm screen to Return Top Normal screen.NOTE: Alarms are automatically reset once alarm con-dition has been corrected.See Table 18 for possible alarm cause and solution.WARNINGTo prevent personal injury, wear safety glasses and gloveswhen handling refrigerant. Do not overcharge system —this can cause compressor flooding.CAUTIONBefore attempting to remove fan motors or motor mounts,place a piece of plywood over evaporator coils to preventcoil damage.