Carrier 62E specifications Service

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SENSOR ENABLE (BV:12) is set to 0, then the ERV will use the DCV CO2 INSIDE (AV:2) parameter. Any value can be written into this parameter.

The ERV will look at this parameter along with parameters: REMOTE MIN DCV VALUE SETPOINT (AV:17), RE-

MOTE MAX DCV VALUE SETPOINT (AV:15), REMOTE MIN CFM SETPOINT (AV:16), and REMOTE MAX CFM SETPOINT (AV:14) to determine the settings for the ERV. These 4 remote set points will only be used if the REMOTE AIRFLOW CONFIGURATION MODE (AV:10) parameter is not 0. Otherwise the values that have been loaded locally into the ERV will be used.

EX FILTER BP (AV:22) AND OA FILTER BP (AV:23) — These status points show the pressure drop across each air fil- ter. This pressure drop is used to determine when the air filters are dirty. These numbers will always be 0 unless the ERV was ordered with this option.

REMOTE EX FILTER BP SETPOINT (AV:24) AND REMOTE OA FILTER BP SETPOINT (AV:25) — These set points are related to the dirty filter indicator option of the ERV. If the ERV has the dirty filter indicator option installed this parameter will set the trip point for which the ERV will give a dirty filter alarm. This number will be dependent on the airflow that the ERV is set to. The best way to determine the dirty filter set points is to use the unit status parameters called EX FILTER BP (AV:22) and OA FILTER BP (AV:23). With clean filters in the ERV, and the ERV running at its design con- ditions, note the values of the filter status parameters. Multiply those numbers by 1.5 and use them for the filter set points. These set points will overwrite the value that was set locally into the ERV. If this value is changed locally it will overwrite the value that was set remotely.

REMOTE EX FAN SPEED SETPOINT (AV:27) AND REMOTE OA FAN SPEED SETPOINT (AV:28) — These parameters allow for direct input to tell the fans how fast to run. The parameter needs to be set to a number between 1% and 100%. When this parameter is set to 0% the ERV’s internal control board will take control of the fans.

ERV WHEEL SPEED (AV:29) — This status shows the speed that the ERV heat exchanger wheel is running on a scale of 0 to 100%. If the ERV was not ordered with a variable fre- quency drive on the wheel this status will always read 100%.

REMOTE VFD WHEEL SPEED SETPOINT (AV:30) — This parameter allows for the wheel rotation speed to be varied. This is often used to change the efficiency of the Energy Re- covery Heat Exchanger Wheel to maintain a constant discharge temperature. This needs to be entered as a number that is be- tween 1% and 100%. Entering 0% will put the wheel speed in automatic mode, and the ERV control board will take control. To turn off the wheel use the REMOTE WHEEL BYPASS ENABLE (BV:16) parameter.

ERV 2POS DAMPER STAT (BV:l) — This status shows if the ERV is commanding the two-position dampers to open. This status will update whether the ERV was ordered with two- position dampers or not.

ERV EX STAT (BV:2) AND ERV OA STAT (BV:3) — These status points output a logic 1 to show when the fan is ON.

ERV WHEEL STAT (BV:4) — The ERV WHEEL STAT sta- tus shows whether or not the ERV heat exchange wheel is running.

ERV EX BLOWER ALARM (BV:5) AND ERV OA BLOWER ALARM (BV:8) — These alarms indicate a cata- strophic failure of a blower in the ERV. The alarms can also in- dicate a missing leg of incoming power, over voltage, under voltage or extremely dirty incoming power to the ERV. These alarms will never go active if the ERV was not ordered with the blower alarm options.

FIX WHEEL ALARM (BV:7) — This alarm indicates that the ERV heat exchange wheel is not turning when it is sup- posed to be turning. This alarm will never go active if the ERV was not ordered with this alarm option.

EX DIRTY FILTER ALARM (BV:6) AND OA DIRTY FILTER ALARM (BV:9) — This alarm indicates that the air

filters in the ERV need to be changed. These alarms are related to parameters REMOTE EX FILTER BP SETPOINT (AV:24) and REMOTE OA FILTER BP SETPOINT (AV:25). The set points determine when the ERV is going to give a dirty filter alarm. This alarm will never go active if the ERV was not or- dered with the dirty filter alarm options.

OA LOW CFM (BV:10) — This alarm becomes active if the desired outside air CFM set point is not being met. The alarm will only trip if the desired outside air CFM set point has not been satisfied for 5 minutes.

REMOTE BP SENSOR ENABLE (BV:11) — If this param- eter is set to OFF the ERV will use the building pressure read- ing off of the sensor inside the ERV. If the parameter is set to ON, the ERV will use the building pressure value that is being written in parameter REMOTE BP SENSOR VALUE.

REMOTE ERV DOWN ENABLE (BV:13) — This parame- ter is another start/stop command for the ERV. Turning this pa- rameter to 1 will shut the ERV down. Unlike the REMOTE START STOP (BV:15) parameter, it is not dependant on the

REMOTE AIRFLOW CONFIGURATION MODE (AV:10) parameter.

REMOTE PWR EXHAUST ENABLE (BV:14) — This pa- rameter puts the ERV into a power exhaust mode that is usually used in conjunction with the economizer of the rooftop unit. The power exhaust mode turns off the wheel and the outside air blower. The exhaust blower will continue to run at its current set point. Setting this parameter to 1 will put the ERV into pow- er exhaust mode.

REMOTE START STOP (BV:15) — This parameter allows the user to turn on/off the ERV. Setting this parameter to 1 will turn the ERV ON. The REMOTE START STOP works in con- junction with the start/stop contact on the ERV field terminal strip if the REMOTE AIRFLOW CONFIGURATION MODE (AV:10) is set to 0. If the REMOTE AIRFLOW CONFIGU- RATION MODE (AV:10) is not set to 0, then the REMOTE START STOP parameter will override the field terminal strip.

REMOTE WHEEL BYPASS ENABLE (BV:16) — Setting this parameter to 1 will turn off the ERV heat exchange wheel. This mode is normally used to disable the wheel when free cooling is available.

SERVICE

CAUTION

Disconnect electrical power before servicing energy recov- ery cassette. Failure to do so could result in personal injury.

Removing and Installing Non-Segmented Wheel for Cleaning (62EB,E7 Units) — Non-segmented en- ergy transfer wheels are secured to the shaft and bearing sup- port beam by a Phillips head screw and hub cover. See Fig. 30.

To remove the energy transfer wheel, follow Steps 1-4 below. (See Fig. 30.) Reverse procedure for wheel installation.

1.Remove front seal assembly (pulley side of cassette) if present.

2.Remove belt from pulley and position temporarily around wheel rim.

3.Remove the hub cover from the wheel. Note the wheel to shaft alignment pin under the hub cover. Ensure this pin

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Contents General ContentsSafety Considerations Physical Data SI Unit 62E Physical Data English Nominal Capacity cfm Installation Supply/Exhaust Fan Options Physical Data SISupply/Exhaust Fan Options Physical Data English FAN Option CodeERV RTUType A62-33062E Unit 62EL-62EU Unit Cabinet Dimensions A62-331A62-246ef A62-247efA62-376.eps Dimension Unit Type A62-377A62-378 A62-44362E2-62E7 Unit Cabinet Dimensions 62E Unit TypeInstall Standard Roof Curb 62E2-62E7 Unit Roof Curb Dimensions A62-44262EB-62EU Unit Horizontal Discharge Box Dimensions A62-379Make Electrical Connections A62-380Supply and Exhaust Fans Electrical Data Unit FAN Motor Option Chassis FLAElectric Heat Electrical Data Heater Unit and Heater 62E Chassis FLA62.83 Typical Wiring Schematic A62-383.eps Energy Recovery WheelSTART-UP Airflow vs. Pressure Drop Across ERV Wheel EpsFig Outside Air Cfm Screen Airflow VS. Pressure Drop Across ERV Wheel UnitEps Exhaust Air Offset Screen A62-388.epsFig Modulating CfmFalse True Wiring Specifications Recommended Vendors and Part Numbers RmcorpAWG CL2PUPC Open Controller NEC MS/TP Wiring RecommendationsSpecification Recommmendation Baud Selection Table SW3 Protocol Switch Settings For MS/TPUPC Communication Protocol Settings DIP Switches Network Points List Bacnet Point Name Read Object ID Write Object NameService A62-278ef Installing Wheel SegmentsA62-279ef Belt Replacement A62-280efA62-281ef A62-282efA62-284ef Pulley LocationA62-285ef MaintenanceReplacing a Blower 62EB and 62E7 Units Diameter Seal Adjustment A62-286efSymptom Possible Causes Action to Check Possible Remedy TroubleshootingERV Troubleshooting Page Application Coupled to RTU or stand-alone Specify RTU

62E specifications

The Carrier 62E is a highly regarded air conditioning unit known for its efficiency, reliability, and advanced technology features. Designed to cater to both residential and light commercial applications, this model is recognized for its ability to provide optimal cooling performance even in challenging climates.

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