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48/50PD05,06
SinglePackageDisplacement Ventilation
orSingleZoneVariableAirflowRooftopUnits
ElectricCooling/GasHeatingwith PURONR(R--410A)
Refrigerant and COMFORTLinkt1.xControls
Controls,Start--Up,Operation,Serviceand
TroubleshootingInstructions
AlarmOutput..................................... 11
TABLEOFCONTENTS
EconomizerMonitoring............................. 11
Page
EconomizerDamperControl ......................... 11
SAFETY CONSIDERATIONS ......................... 2
GENERAL .................
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VariableFrequencyDrive(VFD)...................... 53 Recognize safety information. This is the safety--alert symbol . Integrated GasControl(IGC)Board ................... 54 When you see this symbol on the unit and in instructions or manuals,bealertto thepotentialforpersonalinjury. LowVoltageTerminalStrip(TB1)..................... 55 Understand the signal words DANGER, WARNING, and Scrolling MarqueeDisplay .......................... 56 CAUTION. These words are used with the safety--alert symbol.
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ComfortLink Alarm Status NAVIGATOR 1 2 . 5 8 5 4 . 6° F 4 4.1° F 4 4 . 0° F MODE ESC ENTER Run Status Service Test Temperatures Pressures Setpoints Inputs Outputs Configuration Time Clock Operating Modes Alarms TIME EWT LWT SETP S ServiceTest GENERAL S Temperatures This publication contains Start--Up, Controls, Operation, Service, S Pressures and Troubleshooting information for the 48/50PD rooftop units. (See Table 1.) These units are equipped with ComfortLinkt S Setpoints controls version 1.X o
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down arrow keys to scroll through the top-level categories. These economizer commanded position (EC.CP) is forced, the Navigator are listed in Appendix A and will be indicated on the Scrolling display shows“80f”,wherethe“f”isblinking to signifyaforceon Marquee by the LED next to each mode listed on the face of the the point. The Scrolling Marquee display shows “80.” Where the display. “.”isblinking tosignify aforceonthepoint. Removetheforceby selecting the point that is forced with the key ENTER
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ConventionsUsedinThisManual The following conventions for discussing configuration points for thelocaldisplay (Scrolling MarqueeorNavigator ™ accessory)will be used in this manual. Point names will be written with the Mode name first, then any submodes,then thepointname,each separated by an arrowsymbol ( →).Nameswillalso beshown in bold and italics.As an example, the Fan Status Switch which is located in the Configuration mode, and Unit sub-mode would be written as Configuration → UNIT →FN.SW. T
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CONTROL BOX AND COMPRESSOR ELECTRICAL OPTIONS PANEL INDOOR MOTOR ACCESS DOOR OUTDOOR AIR SCREEN (HIDDEN) CONDENSER COIL ACCESS PANEL GAS SECTION ACCESS FILTER ACCESS DOOR BASEPAN CONNECTIONS ACCESS PANEL C07002 Fig.4 -- Paneland FilterLocations On 3-phase units, it is important to be certain the compressors are limits, evaporator fan motor specifications, FIOP static pressures, rotating in the proper direction. To determine whether or not andfanRPMforvariousmotorpulleysettings.AppendixCand D com
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AccessoryInstallation CONTROLSQUICKSET--UP Check to make sure that all accessories including sensors have The following information will provide a quick guide to setting up been installed and wired as required by the instructions and unit and configuring the 48/50PD series units with ComfortLink ™ wiring diagrams. controls. Unit controls are pre-configured at the factory for factory-installed options. Field-installed accessories will require OrificeChange(48PDOnly) configuration at start-up. Ser
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Table3—ApplicationSpecificConfigurations DISPLACEMENT SINGLEZONE ITEM EXPANSION DEFAULT UNITS VENTILATION VAV SASP CoolSupplyAirSetpoint 65 dF 65 55 FS.MX SupplyFanMaximumSpeed 100 % 100 100 FS.MN SupplyFanMaximumSpeed 20 % 20 70 FS.VM VentModeFanSpeed 50 ∧F 50 50 MIN.C MinCompressorCapacity 70 % 15 70 FS.CD FanSpeedControlDemand 3 ∧F 3 3 SA.MU SASPMaximumResetUp 10 ∧F 3 5 SA.MD SASPMaximumResetDown ---10 ∧F ---3 ---5 MP.MX EconMinatMaxFanspeed 30 % 30 30 PE1.C PowerExhaustStage1CFM 600 cfm 600
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FanStatus Filter Status If a Fan Status accessory was field installed, the unit must be If a Filter Status accessory was field installed, the unit must be configured for it by setting Configuration →UNIT →FN.SW to configured for it by setting Configuration →UNIT →FL.SW to normally open (1)ornormally closed (2).Normally open (1)isthe normally open (1)ornormally closed (2).Normally open (1)isthe preferred configuration. preferred configuration. IMPORTANT: Fan Status input is not on the terminals m
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ProgrammingOperatingSchedules SERVICETEST The ComfortLinkt controls will accommodate up to eight TheServiceTestfunction can beusedto verifyproperoperationof different schedules (Periods 1 through 8), and each schedule is compressors, heating stages, indoor fan, outdoor fans, power assigned to the desired days of the week. Each schedule includes exhaust fans, economizer, crankcase heaters, and the alarm relay. an occupied on and off time. As an example, to set an occupied Use of Service Test is r
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CoolingTest FireShutdown The cooling (COOL) submenu is used to change output status for The fireshutdown inputis provided for unitshutdown in response testing thecooling function.Thefans(FANS)and heating (HEAT) to a fire alarm or smoke detector. The Fire Shutdown Switch service test outputs are reset to OFF for the cooling service test. configuration, Configuration →UNIT →FS.SW, identifies the Thedigitalscrollcontrollerpowertest(CTLR)turnsonand offthe normally open ornormally closed statusofthis
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IMPORTANT: The 48/50PD unit only supports the Gen III PasswordEnable(PROT) TEMP Monitor Thermostat. This variable enables or disables the use of a password. The password is used to restrict use of the control to change DemandLimitinEffect(D.LMT) configurations. Displays if a demand limit has been placed on the unit’s capacity. ServicePassword(PSWD) CircuitOATLockout(C.LOC) This variable is the 4-digit numeric password that is required if Displays if one or more refrigerant circuits operation is
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RH Sensor OnOAQ Input(RH.S) Level1Priority This configuration identifies if a space relative humidity sensor is The CCN point OCCUPIED is forced via an external device such installed on the outdoor air quality (OAQ) input. A YES value as a ComfortIDt controller: when OCCUPIED is forced to YES, enables SP.RH display. A NO value disables SP.RH display and the unit is considered occupied, when OCCUPIED is forced to use. NO,theunitisconsideredunoccupied. IfOCCUPIEDisnotbeing forced, proceed to the l
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(Configuration →CCN →SCH.O →OV.SP) is set to YES. (Service Test →INDP →ECON)to 0 (Economizer DamperClosed) The length of the override period is determined by the and IndoorFan SpeedTest(ServiceTes →FANS →F.SPD)equalto Timed Override Hours setting (Configuration →UNIT →FS.MX). Measure the supply to return (Configuration →CCN →SCH.O →OV>EX). duct static pressure difference and indoor fan RPM. Make correction to static pressure for all options installed in the unit per CompressorOperation the acces
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When the outdoor fan contactor is energized the outdoor fan runs OutdoorFanOperation at low speed. The48/50PDunitsuseamulti--speedoutdoorfanmotortocontrol The outdoorfan speed is controlled by asystem threeof fan levels the head pressure within an acceptable range at low outdoor set up in the control software. Table 6 shows the three levels and ambient temperatures. On the 48 and 50 PD--05 and 06 size units fan speeds for each level. The fan levels are determined by the outdoor fan contactor is
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a. (Configuration →ECON →UEFC =0) -- Disabled (Configuration →ECON →MP.MX)when thefan isat Supply Fan When UEFC = 0,unoccupied freecooling isdisabled. Maximum Speed (Configuration →UNIT →FS.MX) and the Cooling will only occur if the space exceeds the damper position will vary at other fan speeds as described in the unoccupied setpoints. Cooling Mode with Economizer section below when the space is occupied and theindoorfan ison. b. (Configuration →ECON →UEFC =1) -- Unoccupied When UEFC is set to
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exceed Econ Min at Max Fan Speed Lockout Limit (Configuration →AIR.Q →OAQ.L) is 600 ppm (Configuration →ECON →MP.MX) or IAQ Override Position CO2. (Configuration →AIR.Q →OVR.P) to provide economizer FanEnable(AnalogIAQSensor) cooling. The DCV algorithm will operate whenever the building is IA.CF =3 (ControlMinimum Position) occupied and the indoor fan is operating or whenever the IAQ When IA.CF = 3, an external 4 to 20 mA source is used to set the algorithm has caused the indoor fan to operate.
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variable or Unoccupied Cool Set Point (Setpoints →UCSP) plus can be set to --10 and the SASP Maximum Reset Up the Fan Speed Control Demand (Configuration →COOL →SAT →SA.MU) configuration variable (Configuration →COOL →FS.CD) configuration variable the can be set to 0 giving the range of Cool Supply Air Set Point indoor fan will run at 100%. When the temperature in the (Setpoint →SASP)resetof+0 and --10 F. conditioned space is between the Occupied Cool Set Point In normal operation when the Space
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ForallunitswithEconomizers: pressure readings to determine the actual Indoor Fan Max Speed CFM (Configuration →ECON →IDF.C). 1. 1.The outdoor temperature is below the Econo Cool Hi Temp Limit (Configuration →ECON →EH.LO) and above the Econo Cool Lo Temp Limit (Configuration →ECON →EL.LO). ForunitswithEnthalpyControl 2. 1.The outdoor enthalpy is low and the outdoor temperature is below the Econo Cool Hi Temp Limit (Configuration →ECON →EH.LO) and above the Econo CoolLo Temp Limit(Configuration →E
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Quality (IAQ) section of the Economizer Operation section above applied due to cooling requirements that reset the Supply Air Set for more details on Demand Control Ventilation (DCV). Point (Setpoint →SASP). Whenever Relative Humidity Reset is applied the space temperature is controlled by modulating the fan EconomizerOperationforUnitsEquippedwithReturnAir speedevenifthefanwaslockedat100%dueto(Setpoint →SASP) CO SensorOnly 2 reset. When the CO sensor detects a CO level or IAQ Level 2 2 CoolingMo
