Carrier 50VL-A Performance Installation Instructions Manual

Also see for Performance 50VL-A: Owner's information manual Installation instructions Installation instructions Installation instructions

Contents

28VERTICAL ECONOMIZER(FACTORY INSTALLED OPTION)GENERALEconomizers are recommended for only commercial packagedproducts that have X13 motors. The Economizer system utilizesthe latest technology available for integrating the use of freecooling with mechanical cooling for rooftop units. The solid statecontrol system optimizes energy consumption, zone comfort, andequipment cycling by operating the compressors when the outdoorair temperature is too warm, integrating the compressor withoutdoor air when free cooling is available, and locking out thecompressor when outdoor air temperature is too cold. Demandventilation is supported.The Economizer system utilizes gear--drive technology with adirect--mount spring return actuator that will close upon loss ofpower. The Economizer system comes standard with an outdoor airtemperature sensor, a supply air temperature sensor, and lowtemperature compressor lockout switch. Indoor enthalpy, outdoorenthalpy, and CO 2 sensors are available for field installation.Barometric relief dampers provide natural building pressurizationcontrol. Barometric relief dampers are built into the design and arestandard. See Table 9 for Hood Package contents. See Table 10 forsensor usage.Table 9 – Package ContentsSMALL CHASSIS(Sizes 30 and 36)LARGE CHASSIS(Sizes 42, 48, and 60)Qty Content Description Qty Content Description1 Hood Side, Right 1 Hood Side, Right1 Hood Side, Left 1 Hood Side, Left2 Angle, Filter 2 Angle, Filter1Aluminum Filter(20--- 1/2” x 16--- 1/2 x 1”)(521 x 419 x 25 mm)1Aluminum Filter(20--- 1/2” x 16--- 1/2 x 1”)(521 x 419 x 25 mm)18Screws(#10 --- 14 x 5/8” w/SealWasher)18Screws(#10 --- 14 x 5/8” w/SealWasher)2Screws(#8 --- 18 x 3/4” Type B PanHead)2Screws(#8 --- 18 x 3/4” Type B PanHead)1 Bracket, SensorTable 10 – Economizer Sensor UsageAPPLICATIONECONOMIZER WITH OUTDOOR AIR DRY BULBSENSORAccessories RequiredOutdoor Air Dry Bulb None, The outdoor air dry bulb sensor is factoryinstalled.Single Enthalpy HH57AC078Differential Enthalpy HH57AC078 and CRENTDIF004A00*CO2 for DCV ControlUsing a Wall--- MountedCO2 Sensor33ZCSENC02 or CGCDXSEN004A00CO2 for DCV ControlUsing a Duct---Mounted CO2 Sensor33ZCSENC02 orCGCDXSEN004A00{and 33ZCASPCO2 orCGCDXASP00100**or CRCBDIOX005A00{ {*CRENTDIF004A00 accessory is used on many different base units. Assuch, these kits may contain parts that will not be needed for installation.{33ZCSENCO2 and CGCDXSEN004A00 are accessory CO2 sensors.**33ZCASPC02 AND CGCDXASP00100 are accessory aspirator boxesrequired for duct---mounted applications.{{CRCBDIOX005A00 is an accessory that contains both 33ZCSENCO2AND 33ZVASPC02 accessories.ACCESSORIESThe economizer has several field--installed accessories available tooptimize performance. Refer to Table 11 for authorized parts.Table 11 – Accessory ListDESCRIPTION PART NUMBEROutdoor Air Enthalpy Sensor HH57AC078Indoor Air Enthalpy Sensor CRENTDIF004A00Return Air CO2 Sensor (4--- 20 mA) CRCBDIOX005A00CO 2 Room Sensor (4--- 20 mA) 33ZCSENX02 OrCGCDXSEN004A00Aspirator Box for duct Mount CO 2 Sensor(4--- 20 mA)33ZCASPC02 OrCGCDXASP001A00Space Temperature and CO 2 RoomSensor with Override (4--- 20mA) 33ZCT55C02Space Temperature and CO 2 RoomSensor with Override and Set Point(4--- 20mA)33ZCT56C02Heat Pump Relay Package CPRLYKIT001A00INSTALLATIONSmall ChassisTo install the Vertical Economizer on the small chassis perform thefollowing procedure:1. Turn off unit power supply and install lockout tag.ELECTRICAL SHOCK HAZARDFailure to follow this warning could result in personalinjury or death.Before installing or servicing system, always turn off mainpower to system and install lock--out tag. There may bemore than one disconnect switch. Turn off accessory heaterpower switch if applicable.! WARNING2. Remove economizer hood top panel from the return side ofthe unit. See Fig. 18. Keep screws and panel next to theunit.3. Open economizer hood package found on the top skid.4. Remove red shipping tape that attaches the outside airtemperature (OAT) sensor to the economizer assembly.Using two #8 fasteners, found in the hood package, attachthe OAT sensor to the economizer according to Fig. 19.NOTE: See label attached to economizer for OAT installingdetails.5. Remove horizontal return duct cover panel and cut the wireties that hold the hood divider to the economizer assembly.Slide hood divider off from the two slots holding it in placeand place next to the unit. See Fig. 20.50VL-- A