Carrier PHD4 F Series Installation Instructions Manual

51801200404 21Specifications are subject to change without notice.NOTE: If accessory electric heat is installed, and the electric heatfan speed is chosen to be the same as the normal cooling fan speed,the dry airflow must meet or exceed the minimum airflow speedspecified in Table 2 for the specific size unit.Two Cooling Fan Speeds Set-up (Dehumidificationfeature used)IMPORTANT: Dehumidification control must open controlcircuit on humidity rise above set point.Use of the dehumidification cooling fan speed requires use ofeither a 24 VAC dehumidistat or a thermostat which includescontrol of a 24 VAC dehumidistat connection. In either case, thedehumidification control must open the control circuit on humidityrise above the dehumidification set point.1. Using Fig. 18, move the two pin DEHUM jumper from the“STD” position to the “DEHUM” position.2. Remove fan speed tap wire from the “LOW” terminal onthe interface fan board (IFB) (See Fig. 18).3. Determine correct normal cooling fan speed for unit andapplication. Add the wet coil pressure drop in Table 8 tothe system static to determine the correct cooling airflowspeed in Table 5 that will deliver the nominal coolingairflow as listed in Table 1 for each size.NOTE: If accessory electric heat is installed, the dryairflow must meet or exceed the minimum airflow speedspecified in Table 2 for the specific size unit. The electricheat fan speed will be the same as the normal cooling fanspeed.4. Remove the vinyl cap off of the desired speed tap wire(Refer to Table 3 for color coding) for the normal coolingfan speed and place desired speed tap wire on “HIGH” onthe interface board.5. Refer to airflow tables (Table 5) to determine allowablespeeds for the dehumidification cooling fan speed. In Table5, speeds that are not allowed for dehumidification coolingare shaded.6. Remove the vinyl cap off of the desired speed tap wire(Refer to Table 3 for color coding) for the dehumidificationcooling fan speed and place desired speed tap wire on the“LOW” connection on the interface board (IFB). Verifythat static pressure is in the acceptable range for the speedtap to be used for dehumidification cooling.7. Use any spare vinyl plugs to cap any unused speed tapwires.Single Speed Cooling With Higher Electric Heat SpeedThis unit can also be configured to operate with single speedcooling and a higher speed for an accessory electric heater.1. Move the two pin DEHUM jumper located on controlboard (see Fig. 18) from the “STD” position to the“DEHUM” position.2. See Table 2 for minimum airflow for electric heat operation.Add electric heater and filter pressure drop to duct systemstatic pressure to determine total external static pressure.3. Select speed tap from Table 5 that will achieve requiredairflow from Table 2.4. Remove the vinyl cap off of the desired speed tap wire(Refer to Table 3 for color coding).5. Connect the desired speed tap wire to the “HIGH” terminalon the interface fan board (IFB).UNIT OPERATION HAZARDFailure to follow this caution may result in unit componentdamage or improper operation.To use this mode, a speed connection must be made on the“HIGH” terminal that meets or exceeds the minimumairflow found in Table 2.! CAUTIONTable 3 – Color Coding for Indoor Fan Motor LeadsBlack = High SpeedOrange = Med--High SpeedRed = Med SpeedPink = Med--Low SpeedBlue = Low SpeedELECTRICAL SHOCK HAZARDFailure to follow this warning could result in personalinjury or death.Disconnect electrical power to the unit and install lockouttag before changing blower speed.! WARNINGContinuous Fan OperationWhen the DEHUM feature is not used, the continuous fan speedwill be the same as cooling fan speed. When the DEHUM featureis used, the continuous fan will operate on IFB “LOW” speedwhen the DH control lead is not energized, or IFB “HIGH” speedwhen the DH lead is energized (see Fig. 18).COMPRESSORACCUMULATOROUTDOOR COIL INDOOR COILLCSLEGENDHPS – High Pressure SwitchLCS – Loss of Charge SwitchAccurater® Metering De viceArrow indicates direction of flowTXV in MeteringPositionBypassPositionHP SC03011Fig. 17 -- Typical Heat Pump Operation, Cooling ModePHD4, WPH4