Page 1 WEATHERMAKER ® 48/50AJ,AK,AW, AY,A2,A3,A4,A5020-060 Single Package Large Rooftop Units with COMFORTLINK Ti Version 5.x Controls Controls, Start-Up, Operation, Service and Troubleshooting CONTENTS Page Page SAFETY CONSiDERATiONS ......Unit Configuration Submenu ....... Cooling Control ........GENERAL ......... • SETTING UP THE SYSTEM Conventions Used in this Manual ....
Page 2: Table Of Contents
Follow all safety • TEMPERATURE COMPENSATED START LOGIC codes. Wear safety glasses and work gloves. Use quenching Carrier Comfort Network ® (CCN) System ... cloth for unbrazing operations. Have fire extinguishers avail- Alert Limit Configuration ......
Page 3 Access The control is flexible, providing two types of constant can also be done through the Carrier Comfort Network R> (CCN) volume cooling control sequences, two variable air volume system...
Page 4 The(_l_fortLink control system is fullyCOlrununicating and cable-ready forconnection tothe Carrier Comfort Network (CCN) b uilding management system. Thecontrol provides high-speed colmnunications for remote monitoring via the Internet. Multiple unitscanbelinked together (and toother (_l_fortLink c ontrol equipped units) using a3-wire c olmnuni- cation b us.
Page 5 Pilot Service-Config table "generics" and enter the CCN name for (33PILOT-01) device is a component of Carrier's 3V rM system each point to be displayed in the custom points table in the order and serves as a user-interface and configuration tool for all Car- they will be displayed.
Page 6 Table 2 -- Scrolling Marquee Menu Display Structure ( ComfortLink Display Modes) SERVICE TIME OPERATING TEMPERATURES PRESSURES SETPOINTS INPUTS OUTPUTS CONFIGURATION ALARMS STATUS TEST CLOCK MODES Auto View of Service Test Mode Air Pressures Occupied Heat General Inputs Fans Unit Time of Day System Currently...
Page 7 START-UP Controls Use the following steps for the controls: IMPORTANT: Do not attempt to start unit, even disabled. To enable the control, set Local Machine Disable momentarily, until all items on the Start-Up Checklist IMPORTANT: The unit is shipped with the unit control (Service Test-gSTOP) to No.
Page 8 Table 3 -- Fan Performance -- 48AJ,AK020,025 and 48A2,A3020 Units AVAILABLE EXTERNAL STATIC PRESSURE(in. AIRFLOW (CFM) 0.62 0.84 1.07 1.30 1.54 1.78 2.02 2.27 2.51 2.76 4,000 0.97 1.19 1.43 1.69 1.95 2.21 2.48 2.74 3.01 3.28 5,000 1.43 1.65 1.90 2.17 2.45...
Page 9 Table 5 -- Fan Performance -- 48AJ,AK,A2,A3035 Units AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) AIRFLOW (Cfm) 2.46 2.80 3.13 3.82 4.16 4.83 5.49 7,000 3.27 3.63 3.99 4.35 4.72 5.08 5.45 5.81 6.18 6.54 8,000 4.23 4.62 5.00 5.38 5.76 6.18 6.54 6.93...
Page 10 Table 7- Fan Performance- 48AJ,AK,A2,A3040 Units AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) AIRFLOW (Cfm) 2,90 3.71 4.12 4.97 5.85 6.31 8,000 3.81 4.24 4.67 5.11 5.55 6.00 6.45 6.92 7.39 7.87 9,000 4.89 5.34 5.80 6.26 6.73 7.20 7.67 8,16 8.64 9.14 10,000...
Page 11 Table 9 -- Fan Performance -- 48AJ,AK,A2,A3050 Units AVAILABLE EXTERNAL STATIC PRESSURE fin. w_! AIRFLOW (Cfm) Bprn Bprn 8,000 2.98 3.38 3.79 4.20 4.62 5.05 5.49 5.94 6.40 6.86 3.90 4.33 4.77 5.20 5.65 6.10 6.55 7.02 7.49 7.97 9,000 10,000 5.00 5.45...
Page 12 Table 11 -- Fan Performance -- 48AJ,AK,A2,A3060 Units AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) AIRFLOW (Cfm) 4.33 5.04 5.78 6.56 7.39 8.24 9.12 10.02 10.93 11.85 12,000 6.19 6.96 7.74 8.56 9.41 10.30 11.21 12.15 13.11 14.08 14,000 7.28 8.09 8.90 9.73 10.59...
Page 13 Table 13 -- Fan Performance -- 50AJ,AK027,030 and 50A2,A3025-030 Units AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) AIRFLOW (CFM) 0.54 0.72 0.89 1.05 1.22 1.39 1.55 1.72 1.88 2.05 4,000 0.85 1.03 1.22 1.42 1.61 1.79 1.98 2.17 2.35 2.54 5,000 1.26 1.45 1.65...
Page 14 Table 15 -- Fan Performance- 50AJ,AK036 Units AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) AIRFLOW (cfm) 2.35 2.72 3.08 3.46 7,000 2.69 3.86 4.26 8,000 3.53 4.78 5.20 9,000 4.52 5.84 6.29 10,000 5.68 7.07 7.55 11,000 7.01 8.47 8.97 12,000 8.53 10.05 10.57...
Page 15 Table 17 -- Fan Performance -- 50AJ,AK041 Units AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) AIRFLOW (Cfm) 2.69 3.06 3.47 3.66 4.26 8,000 3.53 3.94 4.36 4.78 5.20 9,000 4.52 4.96 5.40 5.84 6.29 10,000 5.68 6.14 6.60 7.07 7.55 11,000 7.01 7.49 7.96...
Page 16 Table 19 -- Fan Performance -- 50AJ,AK051 Units AVAILABLE EXTERNAL STATIC PRESSURE {in. w_l) AIHI=LUW (Cfm) 10,000 2.69 3.31 3.96 4.63 5.33 4.03 4.71 5.41 6.12 6.86 12,000 13,000 4.63 5.55 6.27 7.01 7.77 5.74 6.49 7.24 8.01 8.79 14,000 15,000 6.75 7.53...
Page 17 Table 21 -- Fan Performance -- 48AW,AY020,025 and 48A4,A5020 Units AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) AIRFLOW (CFM) 0.71 0.97 1.25 1.54 1.84 2.14 2.44 2.75 3.06 3.37 4,000 1.10 1.37 1.66 1.96 2.28 2.60 2.93 3.27 3.60 3.94 5,000 1.61 1.89 2.19...
Page 18 Table 23 -- Fan Performance -- 48AW,AY,A4,A5035 Units AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) AIRFLOW (Cfm) 2,59 2.92 3.26 3.95 4.29 4.96 5.62 7,000 3.45 3.81 4.17 4.53 4.90 5.27 5.63 6.00 6.36 6.72 8,000 4.47 4.86 5.24 5.62 6.01 6.39 6.78 7.17...
Page 19 Table 25 -- Fan Performance -- 48AW,AY,A4,A5040 Units AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) AIRFLOW (Cfm) 3.10 3.91 4.33 5.18 6.07 6.53 8,000 4.08 4.51 4.98 5.39 5.83 6.28 6.74 7.21 7.69 8.17 9,000 5.24 5.70 6.16 6.62 7.09 7.87 8.05 8.53 9.03...
Page 20 Table 27 -- Fan Performance -- 48AW,AY,A4,A5050 Units AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) AIRFLOW (Cfm) 8,000 3.18 3.58 3.99 4.41 4.83 5.27 5.71 6,16 6.63 7.09 4.17 4.60 5.04 5.48 5.93 6.38 6.84 7.31 7.79 8.28 9,000 10,000 5.35 5.80 6.27 6.73...
Page 21 Table 29 -- Fan Performance -- 48AW,AY,A4,A5060 Units AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) AIRFLOW (Cfm) 4.81 5.54 6.30 7.10 7.93 8.79 9.68 10.59 11.52 12.46 12,000 6.90 7.69 8.50 9.33 10.20 11.10 12.02 12.97 13.94 14.92 14,000 8.13 8.96 9.79 10.65 11.53...
Page 22 Table 31 -- Fan Performance -- 50AW,AY027,030 and 50A4,A5025-030 Units AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) AIRFLOW (CFM) 0.62 0.83 1.05 1.27 1.49 1.72 1.94 2.17 2.39 2.62 4,000 0.97 1.19 1.42 1.67 1.91 2.16 2.41 2.65 2.90 3.16 5,000 1.43 1.66 1.91...
Page 23 Table 33 -- Fan Performance -- 50AW,AY036 Units AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) AIRFLOW (Cfm) 2.13 2.49 2.86 3.60 7,000 2.88 3.27 3.66 4.46 8,000 3.78 4.20 4.62 5.47 9,000 4.86 5.30 5.74 6.64 10,000 6.11 6.57 7.04 7.99 11,000 7.54 8.03...
Page 24 Table 35 -- Fan Performance -- 50AW,AY041 Units AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) AIRFLOW (Cfm) 8,000 2.88 3.27 3,68 4.08 4.46 3.78 4.20 4.62 5,04 5,47 9,000 10,000 4.86 5.30 5,74 6.19 6.64 6.11 6,57 7.04 7.51 7.99 11,000 12,000 7,54 8,03...
Page 25 Table 37 -- Fan Performance -- 50AW,AY051 Units AVAILABLE EXTERNAL STATIC PRESSURE (in. w_) AIHI=LUW (Cfm) 10,000 2.98 3.61 4.26 4.95 5.66 4.48 5.17 5.88 6.61 7.36 12,000 13,000 5.39 6.11 6.85 7.61 8.38 6.41 7,17 7.94 8.72 9.51 14,000 15,000 7.56 8,34...
Page 26 NOTES: October 24, 1997. 1. Extensive motor and electrical testing on the Carrier units has ensured that the full horsepower range of the motor can be utilized with confidence. Table 40A -- Air Quantity Limits (48AJ,AK,AW,AY,A2,A3,A4,A5) MINIMUM HEATING MINIMUM HEATING...
Page 27 Table 40B -- Air Quantity Limits (50AJ,AK,AW,AY,A2,A3,A4,A5) UNIT COOLING ELECTRIC HEAT Min CFM Max CFM* Min CFM Max CFM 50AJ,AW, A2,A3020 6,000 10,000 50A K,AY, A4,A5020 4,000 10,000 50AJ,AW, A2,A3025 7,500 12,500 50A K,AY, A4,A5025 5,000 12,500 50AJ,AW, A2,A4027 8,100 13,500 50A K,AY, A3,A5027 5,400...
Page 28 Variable Volume Units Using Return 5. See the Exhaust Options section on page 29 for additional Sensor or Space Temperature Sensor -- To con- exhaust option configurations. figure the unit, perform the following: Multi-Stage Constant Volume Units with 1. The type of control is configured under Cbnfiguration Space Sensor...
Page 29 Indoor Air Quality (IAQ) Options correct value for hours, in 24-hour (military) time. Press ENTER and hour value is saved and the minutes digits DEMAND CONTROL VENTILATION -- Under (bnfigu- will start flashing. Use the same procedure to display and ration-+IAQ-+DCV.C, the following configuration...
Page 30 Howevec it is important tonote thatthe user c anleave a individually. After starting each compressor, the control will Service Test ]node toview anyofthelocal d isplay modes and check the suction pressure after 5 seconds of run time. If the the control willremain i n the Service Test ]node.
Page 31 THIRD PARTY CONTROL A 4 to 20 mA input that can reduce or limit capacity linearly to a set point percentage. Thermostat The method of control would be through In either case, it will be necessary to install a controls ex- the thermostat inputs: pansion module (CEM).
Page 32 IQ.LC = 2 (IAQ Discrete Override) -- If the user sets IQ.LC The 4 to 20 mA signal from the sensor wired to TB5-6 and to 2 (IAQ Discrete Override), and Configuration-+SW..LG-+ 7 is scaled to an equivalent indoor CO 2 (IAQ) by the parame- IAQ.L is set to OPEN, then an open switch reads low and a ters IQ.R.L...
Page 33 Table 42 -- Operating Modes Display Table ("Internal Failure") System Mode Test -- When the systeru mode is Test, the con- ITEM EXPANSION RANGE CCN POINT trol is lhnited to the Test mode and is controllable via the local SYS.M ascii string displays (scrolling...
Page 34 Unit not in factory I_._l_st ANDfi ..contlol mode is_ Fire- System Smoke Mode Control_ hpu,s-> FIRE - >_ ,opofs-. F,RE-. _o PRES in alarm? EVAC in alarm? HVAC Mode ,;<OFF " (PressunzatEon) ............Exceptions C.TYP changed SSTP = YES? Inputs->GENJ->...
Page 35 accurate return-air temperature before the return-air temper- HVAC Mode -- TEMPERING HICOOL (12) -- The econ- position amre is allowed to call out any mode. omizer is at minimum vent but the combination of the outside-air temperature the economizer position •...
Page 36 Compensated Start s ection formore information. A setting of Suction Pressure Transducer Type (SRXR) -- This configu- 0 minutes indicates Temperature Compensated Start in Cooling ration specifies the type of suction pressure transducer that is is not permitted. being used. Set SRXR to 0 for support of a pressure transducer with a range of 0 to 135 psig.
Page 37 Reset MAT Table Entries? (MAT.R) This configuration mechanical cooling to allow for the greatest use of flee cool- allows the user to reset the internally stored MAT learned con- ing. When both mechanical cooling and the economizer figuration data back to the default values. The defaults are set being used, the control will use the economizer to provide bet- to a linear relationship...
Page 38 out a LOW COOL or a HIGH COOL mode and maintain a SUPPLY AIR RESET CONFIGURATION -- Supply Air low or high cool supply air set point. Reset can be used to modify the current cooling supply air set point. Supply Air Reset is applicable to control types, C TYP = •...
Page 39 Table 47 -- Cooling Configuration RANGE I UNITSI CCNPOINT ITEM EXPANSION DEFAULT COOL COOLING CONFIGURATION Z.GN -10 - 10 Capacity Threshold Adjst Z_GAIN MC.LO -20 - 55 OATLCOMP Compressor Lockout Temp C.FOD 0-600 COOL Fan-Off Delay, Mech Cool Yes/No MLV S-EL Min.
Page 40 temperature (OAT) r ises a bove 7 5For the highest active cir- will run until the motor protector trips, which occurs up to cuitsaturated condensing temperature (SCT) r ises above t he 90 minutes later. Advanced scroll temperature protection will HPSP a nd remains onuntil t hecondition isrepaired regardless reset automatically before...
Page 41 The advantage of this offset technique is that the control can or is in the temperature compensated start mode (T.CST). safely enforce a vent mode without worrying about crossing set the unit is occupied or in temperature compensated start mode, points.
Page 42 Table 48 -- Cool/Heat Set Point Offsets Configuration ITEM EXPANSION RANGE UNITS CCN POINT DEFAULT D.LV.T COOL/HEAT SETPT. OFFSETS L.H.ON Dmd Level Lo Heat On -1 -2 DMDLHON H.H.ON 0.5 - 20.0 DMDHHON Dmd Level(+) Hi Heat On L.H.OF 0.5- 2 DMDLHOFF Dmd Level(-) Lo Heat Off L.C.ON...
Page 43 then Lo Cool Mode mechanical stages = 2 and Hi Cool If the set point cannot be satisfied or the economizer is not Mode mechanical stages = 2. active, then cooling will be brought on one stage at a time when the evaporator discharge temperature...
Page 44 Table 52 n Staging Sequence With Hot Gas Bypass 48/50AK,AY020-027 and Multi-Stage 48/50AJ,AW020-027 SEQUENCE SEQUENCE STAGE I 2 I a I I 2 I COMP Compressor Status Compressor Status UNIT Unit Capacity 48/50A Unit Capacity 48/50A 100% 100% 100% 100% 100% 100% *With Minimum Load Valve ON,...
Page 45 Table 57 -- Staging Sequence Without Hot Gas Bypass -- 48/50A3,A5020-027 and Multi-Stage 48/50A2,A4020-027 SEQUENCE SEQUENCE STAGE COMP Compressor Status Compressor Status UNIT Unit Capacity 48/50A Unit Capacity 48/50A 100% 100% 100% 100% 100% 100% Table 58 u Staging Sequence With Hot Gas Bypass -- 48/50A3,A5020-027 and Multi-Stage 48/50A2,A4020-027 SEQUENCE...
Page 46 COOLING MODE DIAGNOSTIC HELP -- To quickly de- should drop in degrees depending on the R.PCT calculation termine the current trip points for the cooling modes, the Run and exactly how much additional capacity is to be added. Stares sub-menu at the local display allows the user to view the ADD.R = R.PCT...
Page 47 Table 62 -- Run Status Cool Display ITEM EXPANSION RANGE .I, UNITS CCNPOINT WRITE STATUS COOL COOLING INFORMATION C.CAP CAPTOTAL Current Running Capacity C UR. S COOL STG Current Cool Stage CL ST-AGE REQ.S Requested Cool Stage MAX.S CL_IAXSTG Maximum Cool Stages DEM.L Active Demand Limit forcible...
Page 48 MAT Cale (_nfig (MAT.S) -- This configuration gives the To use Demand Lhniting, select the type of demand limiting user two options in the processing of the mixed-air temperature to use. This is done with the Demand Lhnit Select configura- (MAT) calculation: tion ((bnfiguration -+DMD.L -+DM.L.S).
Page 49 Table 63 -- Demand Limit Configuration ITEM EXPANSION RANGE UNITS CCN POINT DEFAULT DMD.L DEMAND LIMIT CONFIG. DM.L.S Demand Limit Select D.L.20 Demand Limit at 20 ma DMT2-OMA O- 100 SH.NM 0 - 99 SHED Loadshed Group Number DMD CTRL SH.DL Loadshed Demand Delta SHED...
Page 50 Table 64 -- Condenser Fan Staging 48/50A UNIT SIZE FAN RELAY 020-035 036-050 060 with MCHX 051,060 OFM4 OFM1 OFM1, OFM2 OFM1, OFM2 OFC1,4" (MBB - RELAY 6) OFM2 OFM2 OFM3, OFM4 OFM3, OFM4, OFM5, OFM6 OFC2 (MBB - RELAY 5) OFC3 C.A1-AUX or C.A2-AUX OFM3 OFCI*...
Page 51 Table 65 -- Heating Configuration ITEM EXPANSION IDEFAULT IRANGE I UNITS I CON POINT HEAT HEATING CONFIGURATION HT.CF Heating Control Type HEATTYPE HT.SP 80 - 120 Heating Supply Air Setpt SASPHEAT OC.EN Occupied Heating Enabled Yes/No HTOCCENA LAT.M MBB Sensor Heat Relocate Yes/No HTLATMON 0 - 3...
Page 52 TEMPERATURE DRIVEN HEAT MODE EVALUATION -- To get out of a HIGH HEAT mode, the controlling tempera- This section discusses the control method for selecting a heat- ture must rise above the heating set point minus L.H.ONplus L.H.OF/2. ing mode based on temperature. Regardless of whether the unit is configured for return air or space temperature, the logic is ex- The Run Status table in the local display allows the user to actly the same.
Page 53 This should be set to NO as a limit switch temperature sensor is NOTE: PID values should not be modified without not used with A Series units. approval from Carrier. Limit Switch High Temp (SW.H. T) -- This configuration the temperature limit above which stages of heat will be...
Page 54 Table 68 -- Staged Gas Configuration ITEM EXPANSION RANGE UNITS CCN POINT DEFAULTS SG. CF STAGED GAS CONFIGS HT.ST HTSTGTYP Staged Gas Heat Type CAP.M HTCAPMAX Max Cap Change per Cycle 5 - 45 M.R.DB S.Gas DB min.dF/PID Rate HT MR DB S.G.DB 0 - 5 HT SG DB...
Page 55 Table 69B -- Staged Gas Heat -- 48A2,A3,A4,A5 Units UNIT SIZE HEAT CAPACITY UNIT MODEL NO. Configuration--_HEAT-_SG.CF POSITION NO. 5 --_HT.STENTRY VALUE 5 STAGE 020-030 High 2 = 7 STAGE 5 STAGE 035-050 High 1 = 5 STAGE 4 = 11 STAGE High 3 = 9 STAGE Table 70 -- Staged Gas Heat Control Steps (Configuration_HEAT_SG.CF_HT.ST...
Page 56 New Sensor -- A field-provided duct-mount tem- cycle has occurred and any subsequent heat cycles will not be perature sensor (Carrier 33ZCSENPAT or equivalent treated as a morning warm up period. 10 kilo-otnn at 25 C NTC [negative temperature coefficient] TEMPERING MODE -- In a vent or cooling mode, the roof- sensor) is required.
Page 57 HVAC mode = "Tempering LoCool" pressure and calculates the error from set point. This error is HVAC mode = "Tempering HiCool" simply the duct static pressure set point minus the measured Thedecision making/selection process forthetempering duct static pressure. The error becomes the basis for the propor- tripset p oint i sas follows: tional term of the PID.
Page 58 Static Pressure Set Point (SRSP) This is the static pres- directly to the 0 to 3 in. wg of reset. Therefore 2 mA reset is sure control point. It is point against which 2/16 * 3 in. wg = 0.375 in. wg of reset. If the static pressure set (_l_fortLink controls compare...
Page 59 The SPRESET variable is always Carrier before making significant changes to these factors. checked to be a positive value or zero only (negative values are Static Pressure PID Run Rate (S.PID--cSRTM) This is the limited to zero).
Page 60 Table 76 -- Static Pressure Reset Related Points ITEM EXPANSION RANGE UNITS CCN POINT DEFAULT Inputs -_ 4-20 -_ SP.M Static Pressure mA 4-20 SP_MA -_ 4-20 -_ SP.M.T Static Pressure mA Trim -2,0 - +2,0 SPMATRIM -_ 4-20 -_SP.R.M Static Pressure Reset mA 4-20 SPRST_MA...
Page 61 modulate to thesame control point(Sum Z) thatis used to 105 I10 control capacity staging. Theadvantage islower compressor cycling coupled withtighter temperature control. Setting t his option t oNowill cause theeconomizer, if it isable toprovide freecooling, t o opento the Economizer Max.Position (ECMX) d uring m echanical cooling.
Page 62 Table 79 -- Economizer Configuration Table ITEM EXPANSION RANGE UNITS CCN POINT DEFAULT EC.EN Economizer Installed? Yes/No ECON EC.MN Economizer Min.Position O- 100 ECONOMIN EC.MX Economizer Max.Position O- 100 ECONOMAX E.TRM Economzr Trim For SumZ ? Yes/No ECONTRIM E. SEL ECON Econ ChangeOver Select...
Page 63 Unoccupied Economizer Free Cooling Outside Lockout cooling" is located at Run Status--+VIEW--+EC:C:P This is Temperature (FC:LO) This configuration option allows the economizer control point. the user to select an outside-air temperature below which unoc- The control selects set points differently, based on the cupied free cooling is not allowed.
Page 64 Table 80 -- Economizer Run Status Table WRITE STATUS ITEM EXPANSION 0 100 RANGE ECN. P Economizer Act.Curr. Pos. ECONOPOS forcible ECN. C Economizer Act.Cmd. Pos. 0_100 ECONOCMD NITS CCN POINT ACTV Economizer Active YES/NO ECACTVE DISA ECON DISABLING CONDITIONS YES/NO UNAV Econ Act.
Page 65 CONSTANT VOLUME 2-STAGE CONTROL (BRCF = 1) The number of power exhaust stages available for this con- OPERATION -- Two exhaust fan relays w illbeturned o nand trol algorithin is a function of the number of motors it supports. offbased o neconomizer position.
Page 66 Table 83 -- Power Exhaust Staging (BP.CF= 2) BP.MT= 1 (4 motors) PE.A PE.B PE.C Power Exhaust Stage 0 Power Exhaust Stage 1 Power Exhaust Stage 2 Power Exhaust Stage 3 Power Exhaust Stage 4 Bt_.MT= 2 (6 motors) PE.A PE.B PE.C Power Exhaust Stage 0...
Page 67: Indoor Air Quality Control
RELEVANT ITEMS configurable amount, which is referred to as Differential Quality Low Limit (DAQ.L). economizer's commanded output found Outputs" -+E CON-+E CN. C If OAQ is not being measured, OAQ can be manually con- figured. It should be set at around 400 to 450 ppm or measured The configurable fire speed override for supply fan VFD is in with a handheld...
Page 68 • IQ.A.C = 4 (10K potentiometer minimum position) -- With a 10K linear potentiometer connected to TB5-6 and 7_ the economizer minimum position will be scaled linearly from 0% (0 kilo-otnns) to ECMX (10 kilo-otnns). ECONOMIZER MINIMUM DAMPER IAQ Analog Fan Config (Configuration---_IAQ---_AQ. _T---_ POSITION !Q.A.F) -- This configuration is used to configure the control of the indoor fan.
Page 69: Pre-Occupancy Purge
-- This is the reference that will be used with a An ECB option is required to accolmnodate an RH (relative non-Carrier IAQ sensor that may have a different characteristic humidity) sensor connection. A CEM (option or accessory) curve. It represents the CO2level at 4 mA.
Page 70 Table 84 -- Indoor Air Quality Configuration ITEM EXPANSION RANGE UNITS CON POINT DEFAULT DCVC DCV ECONOMIZER SETPOINTS EC.MN Economizer Min.Position O - 100 I ECONOMIN IAQ.M IAQ Demand Vent Min.Pos. IAQMINP 0 - 100 AQ.CF AIR QUALITY CONFIGS IQ.A.C IAQ Analog Sensor Config IAQANCFG IQ.A.F...
Page 71: Settingup The System
(_l_fortLink control to partici- Configuration--cDEHU-+D.SEL = 1 and Configura- pate as an element of the Carrier Comfort Network (CCN) sys- tion--+HEAT--cHT.(T = staged gas or hot water valve, tem directly from the local display. This section will deal with...
Page 72: Alert Limit Configuration
Table 86 -- CCN Configuration I RANGE I UNITS DEFAULT ITEM EXPANSION POINT CCN CONFIGURATION CCNA CCN Address CCNB CCN Bus Number CCNBUS - 239 I CCNADD - 239 BAUD CCN Baud Rate CCNBAUDD BROD CCN BROADCST DEFINITIONS TM.DT CCN Time/Date Broadcast ON/OFF CCNBC...
Page 73: Sensor Trim Configuration
then Alert309 will occur. The unitwillcontinue torunand the Air Temperature Leaving Supply Fan Sensor (SAT.T) -- This alert w illautomatically reset. variable is used to adjust the supply fan temperature sensor reading. The sensor reading can be adjusted 4- 10 o F to match Supply Duct Pressure Low Alert Limit (SRL) -- If the unit...
Page 74: Discrete Switch Logic Configuration
A list is shown settings of switches and inputs. This is used when field-supplied Table 90. switches or input devices are used instead of Carrier devices. The Test Display LEDs (TEST) -- This is used to test the opera-...
Page 75: Hot Gas Bypass
Table 89 -- Switch Logic Configuration ITEM EXPANSION RANGE CCNPOINT DEFAU_ SW.LG SWITCH LOGIC: NO / NC FTS.L FLTSLOGC Filter Status Inpt-Clean Open/Close Open IGC.L IGC Feedback - Off GASFANLG Open/Close Open RMI.L RemSw Off-Unoc-Strt-NoOv RMTINLOG Open/Close Open ECS.L Economizer Switch - No ECOSWLOG Open/Close Open...
Page 76 Table 92 -- Remote Switch Logic Configuration REMOTE REMOTE SWITCH CONFIGURATION (RM.CF) SWITCH REMOTE INPUT STATE SWITCH LOGIC STATUS CONFIGURATION (REMT) No Remote Switch Occ-Unocc Switch Override (RMI.L) Start/Stop OPEN Start No Override XXXXX Unoccupied OPEN CLOSED Override Occupied Stop XXXXX OPEN Override...
Page 77: Troubleshooting
Table 93 -- Time Clock Configuration ITEM EXPANSION RANGE POINT DEFAULT TIME TIME OF DAY HH.MM Hour and Minute 00:00 TIME DATE MONTH,DATE,DAY AND YEAR MNTH Month of Year multi-text strings 0-31 Day of Month DOWDISP Day of Week multi-text strings YEAR Year YOCDISP...
Page 78: Transducer Troubleshooting
Transducer Troubleshooting E On 48/50AJ,AK, the suction and discharge pressure of circuits A and B. pressure/voltage characteristics of these transducers are shown AW, AY units, electronic control uses 2 suction pressure in Tables 103 and 104. The accuracy of these transducers transducers to measure the suction...
Page 79 Table 94 -- Cooling Service Analysis (cont) PROBLEM SOLUTION COMPRESSOR RUNNING BUT COOLING INSUFFICIENT Suction Pressure Low 1. Refrigerant charge low. 1. Add refrigerant, 2. Head pressure low. 2. Check refrigerant charge, 3. Air filters dirty. 3. Clean or replace filters, 4.
Page 80 Table 95 -- Gas Heating Service Analysis PROBLEM CAUSE REMEDY Burners Will Not Ignite. Active alarm. Check active alarms using ComfortLink scrolling marquee. No power to unit. Check power supply, fuses, wiring, and circuit breakers. No power to IGC (Integrated Gas Control). Check fuses and plugs.
Page 81 I F_ MODPlED (HEAT_3) FAN DELAY - OPENk'qG OF UMIT 2 FLUS 1. BLOWN 5 _P FUSE 2. DEFECTIVE 24V TRANS. IN[_.,ATES & BROKEN '€_tRE CLOSED GAS VALVE 4. NO _ TO UNIT CYCLED 4 TIMES ON SINGLE CALL FOR HEAT HEATING F/_I MOTOR COMPRESSOR...
Page 82 Table 97 -- 5K Thermistor Temperature vs. Resistance (SCT Sensors) (English) VOLTAGE VOLTAGE VOLTAGE TEMP RESISTANCE TEMP TEMP RESISTANCE DROP RESISTANCE DROP DROP (Ohms) (Ohms) (Ohms) 3.699 1.982 7,686 0.511 1,190 98,010 1.956 0.502 3.689 94,707 7,665 1,165 3.679 1.930 7,468 0.494 1,141...
Page 83 Table 98 -- 5K Thermistor Temperature vs. Resistance (SCT Sensors) (SI) VOLTAGE VOLTAGE VOLTAGE RESISTANCE TEMP RESISTANCE TEMP RESISTANCE TEMP DROP DROP DROP (Ohms) (Ohms) (Ohms) 1.982 0.506 3.705 100,260 7,855 1,158 3.687 1.935 0.490 94,165 7,499 1,118 1.889 0.475 3.668 88,480 7,161...
Page 84 Table 99 -- 10K Thermistor vs. Resistance (T55, T56, OAT, RAT, EDT, LAT Sensors) (English) TEMP VOLTAGE RESISTANCE TEMP VOLTAGE RESISTANCE TEMP VOLTAGE RESISTANCE DROP (V) (Ohms) DROP (V) (Ohms) DROP (V) (Ohms) 4.758 2.994 0.890 196,453 14,925 2,166 4.750 189,692 2.963 14,549...
Page 85 Table 100 -- 10K Thermistor vs. Resistance (T55, T56, OAT, RAT, EDT, LAT Sensors) (SI) TEMP VOLTAGE RESISTANCE TEMP VOLTAGE RESISTANCE TEMP VOLTAGE RESISTANCE DROP (V) (Ohms) DROP (V) (Ohms) DROP (V) (Ohms) 4.762 3.056 0.940 200,510 15,714 2,315 4.748 3.000 0.913 188,340...
Page 86 Table 102 -- Suction Pressure Transducer Pressure (PSIG) vs. Voltage (SP-A, SP-B, SP.XR - 1, 48/50AJ,AK,AW,AY Units Only) PRESSURE VOLTAGE PRESSURE VOLTAGE PRESSURE VOLTAGE PRESSURE VOLTAGE (PSIG) DROP (V) (PSIG) DROP (V) (PSIG) DROP (V) (PSIG) DROP (V) 1.520 2.520 3.520 0.500 1.540...
Page 87 Table 103 -- Suction Pressure Transducer (PSIG) vs. Voltage (SP-A, SP-B, 48/50A2,A3,A4,A5 Units Only) PRESSURE VOLTAGE PRESSURE VOLTAGE PRESSURE VOLTAGE PRESSURE VOLTAGE PSIG PSIG PSIG 0.466 1.509 2.543 3.576 0.476 1.519 2.553 3.586 0.486 1.529 2.562 3.596 0.495 1.539 2.572 3.606 0.505 1.549...
Page 88 Table 104 -- Discharge Pressure Transducer (PSIG) vs. Voltage (DP-A, DP-B, 48/50A2,A3,A4,A5 Units Only) PRESSURE VOLTAGE PRESSURE VOLTAGE PRESSURE VOLTAGE PRESSURE VOLTAGE DROP(V) (PSIG) (PSIG) DROP (V) (PSIG) DROP (V) (PSIG) DROP (V) 14.5 0.993 1.490 1.987 0.500 1.000 1.496 1.993 0.509 0.515...
Page 89 Table 104 -- Discharge Pressure Transducer (PSIG) vs. Voltage (DP-A, DP-B, 48/50A2,A3,A4,A5 Units Only) (cont) PRESSURE VOLTAGE PRESSURE VOLTAGE PRESSURE VOLTAGE PRESSURE VOLTAGE DROP(V) (PSlG) (PSIG) DROP (V) (PSIG) DROP (V) (PSIG) DROP (V) 2.483 2.992 3.501 4.010 2.489 2.998 3.507 4.016 2.495...
Page 90: Forcing Inputs And Outputs
Forcing Inputs and Outputs Run Status-+VIEW--cHEST This variable displays Many variables current number of heating stages active (for staged gas control be forced both frolI1 the CCN and directly at the local display. option only). Compare to following point. This can be useful during diagnostic testing and also during operation,...
Page 91: Ccn/Linkage Display Table
Cap Threshold Subtracting (Z.MIN) This parameter is Slow Change Cap Override (SLOW) -- With a rooftop unit, used in the calculation of 334Z and is calculated as follows: the design rise at 100% total unit capacity is generally around 30 ° F. For a unit with 4 stages, each stage represents about ZMIN = (bnfiguration_COOL--cZGN...
Page 92 Table 107- Cooling Information Display Table ITEM EXPANSION RANGE WRITE STATUS I UNITS POINT COOL COOLING INFORMATION C.CAP CAPTOTAL Current Running Capacity CUR.S COOL STG Current Cool Stage CL ST-AGE REQ.S Requested Cool Stage MAX.S CL_IAXSTG Maximum Cool Stages DEM.L Active Demand Limit forcible DEM_LIM...
Page 93: Software Version Numbers Display Table
Table 112 -- Time Guard Display Table I UNITS I ITEM EXPANSION RANGE POINT I WRITE STATUS TMGD TIMEGUARDS TG.A1 Compressor A1 Timeguard CMPA1 TG TG.A2 CMPA2 TG Compressor A2 Timeguard TG.B1 CMPB1 Compressor B1 Timeguard TG.B2 CMPB2 Compressor B2 Timeguard TG.H1 HS1TC_ Heat Relay 1 Timeguard...
Page 94 Table 114 -- Alert and Alarm Codes ALARM OR RESET PROBABLE CAUSE ALERT DESCRIPTION ACTION TAKEN BY CONTROL METHOD NUMBER A051 Welded contact Circuit A, Compressor 1 Stuck On Failure Turn off all compressors Manual Automatic High pressure switch, compressor P051 Circuit A, Compressor 1 Failure...
Page 95 Table 114 -- Alert and Alarm Codes (cont) ALARM RESET DESCRIPTION ACTION TAKEN BY CONTROL PROBABLE CAUSE ALERT METHOD NUMBER T300 Space Temperature Below Limit Stop cooling, but continue to heat Automatic Outdoor dampers stuck, no load T301 Space Temperature Above Limit Stop heating, but continue to cool...
Page 96 The cause of the alert is usually a faulty thermistor, IMPORTANT: If thecompressor starts, verify that the shorted or open thermistor caused by a wiring error, or a loose indoor and outdoor fans are operating properly. connection. T072 (Evaporator Discharge Reset Sensor Failure) If the IMPORTANT: If the CS is.always detecting current, then...
Page 97 any elements of the control which requires its use including of the affected circuit, if it exists, will be shut down with a local economizer differential enthalpy control. alert (P120, P121) and a 10-minute thneguard will be added to The RA.RH sensor is located in the return air section near the compressor.
Page 98 com.pressor isbrought onand 5seconds afterwards. The rate of T177 (4-20 mA Demand Limit Failure) This alert indi- suction pressure change from 5seconds before t he compressor cates a problem with the optional remote 4 to 20 mA demand isbrought ontowhen t hecompressor isbrought oniscalculat- limit signal (Inputs_4-20--cDLM.M) that is connected...
Page 99 configured using the BP HI Alert Limit ((bnfiguration T301 (Space Temperature Above Limit) -- If the space tem- perature is above configurable High Alert ---)ALLM--+BBH). measured pressure Lhnits (occupied [(bnfiguration--cALLM--cSRI-I.O] (Pressures--cAIR.P--cBP) is above the lhnit for 5 minutes, then the alert will occur. 5 minutes or unoccupied [(bnfiguration--cALLM--cSRI-I.
Page 100 Because theDirtyAir Filter s witch canbeconfigured nor- on, the software will behave as if Y1 and Y2 are both on. When mally opened or closed, theswitch might b eopen orclosed. Y2 turns off, the software will behave as if Y1 and Y2 are both The configuration forthis switch i nput c an befound a tvariable Off.
Page 101: Major System Components
Carrier Comfort Network :R: s ystem through the CCN colmnuni- switches cations port. The board is located in the main control box. The CEM board is located in the main control box. See ECONOMIZER...
Page 102 _[_OT_ FIELO S_Oi< _ ALAR_ CONTACTS ?E212 LA_L _? _ _i_ _"_"_E,2 P_ _?# ° FOR REED MORITORED c_ e_. eR_ _E_ SE AB EQUIPPEDWITH HEATIN NON THERMOSTAT CONTROL OF _IR[_A_AGE_ENT P[12 :,_ _PL12Z BOX LABEL APPLICATIONS ..-Jl .."m NEXT --<÷W_T----.._W_ B_ EC O...
Page 103 WIRING DIAGRAM I_A_SI ×2 3!0E ) ¢A2 )C BI C_Z C2 OECIC? 0F¢2 C? IFCA¢_ _LARM_ THE 020 027 UNITS ONLY HAVE 3 CONPRESSORS AND DO HOT USE THE CON B2 CRANKCASE NEAT[RS Fig. 15 1 Typical Main Control Box Wiring Schematic (48/50AJ,AK,AW, AY Units) (cont)
Page 104 I.I. ]£_ u/,v: OhF...
Page 105 PL18 6 I--R _------>>-- _r_--Ao SE,SOR ] PL? 6 • S_O E C _ 3 _:----- R I D _-----L_ R_ D ------>>'-- ED -- D.._;_ECO"] NEXT PAGE SEE PO!t/IB IABI .... } L P 5 PL13 5 TRAN 3 SMOKE LABEL PL20_...
Page 106 RL ' 3d_, PE C _,_ d_, dHZ>, _)o RL_2_ Fig. 17 -- Typical Auxiliary Control Box Wiring Schematic (cont)
Page 107 _ ..i_ " _ 1 ....... i .._ J ....I...... C0_1 NU_I ...................................._i,o_ ..... ii_i" ....... _ ........... _;,:_;,L_ ............................*" ° i" ........Fig. 18 1 Typical 2 Stage Gas Heat Wiring Schematic (Size 051 and 060 Units Shown)
Page 108 Z TO NEXT PAGE L_o_ BLK _<_J5 <!) r_RED_ LATI_BLI_ _'K_ STAGED HEAT BOARD (SCB) HKSOAA032 Fig. 19 -- Typical Staged Gas Heat Wiring Schematic (Size 051 and 060 Units Shown)
Page 109 Fig. 19 -- Typical Staged Gas Heat Wiring Schematic (Size 051 and 060 Units Shown) (cont)
Page 110 €,, €,, "o €,, ,_,,,...
Page 111 NOTE 2_\\ x_" CS M IfCB F¢ _E_ ...._BLK_ _208/2SOV 30HP MOTOR ONLY ...... _08/BSOV401 > MOORONLY YEL_ _YEL__: _ ......©FCI I (2 BLF_ .._0+,,,>_7 _ ........_Ii_ BL u PAGE ,_[_ ::::::::::::3 NEXT OFM3 ©_M4 6Ra/YEL ..
Page 112 TABLEC ]ABLE D 208-230/460V TRANSFORMER I CONNECT 208-230/460V TRANSFORMER CONNECT 460v PRIMARY VOLTAGE: 460V BLKo_ PRIMARY VOLTAGE: 460V (8LK) 230V " 230V H2 (6LK) 208V ORN_ 208V H3 (BLK) COMM H4 (YEL) COMM SECONDARY VOLTAGE 115V (ELK) SECONDARY VOLTAGE X1 (8LK) RED_ COMM COMM...
Page 113 '!i!
Page 114 --V--- p-r--% _--1 ,_,, _ i _ ,,i ? _ ,,_, < ..!.... <?J <]_ ... _'I] 2 • • _¢F_[ Ijr_ (}0141.U,I i A / 0 I, S > ¢/) ct ° ..i £> c > C'q ;x _ ,'!P <a;;...
Page 116 _\ :Y [i7 I b.._,: L ) ,,_1 ii\ ; ...........
Page 117 Capacitor Circuit Breaker Staged Gas Heat Control Board Control Circuit Breaker Saturated Condensing Temperature Sensor Crankcase Heater Scrolling Marquee Display Carrier Comfort Network ® Saturated Suction Temperature Sensor T-55 Controls Expansion Module Room Temperature Sensor COMP T-56 Compressor Motor Room Temperature Sensor with Setpoint...
Page 118 RLY 11 JlO, 1-3 1 = 2 = RLY11A, 3 = RLY11B 1 = Closes RLY11A/RLY11B YAC -- Gas Heat Unit YELLOW LED - RED LED - STATUS GREEN LED- CCN (CARRIER COMFORT NETWORK) _PMENT NETWORK) Z_INSTANCE JUMPER (SET TO 1) CEPL130346-01 HK 50A4.)29...
Page 119 Table 116 -- Economizer Control Board (ECB1) Inputs and Outputs I/O POINT POINT PLUG AND PIN POINT DESCRIPTION PORT STATE SIGNAL PIN(S) NAME NAME REFERENCE INPUTS RMTIN Remote occupancy J4, 1-2 24VAC =I,0VAC ECONENBL, Economizer enable J4, 3-4 24VAC =I,0VAC ECOORIDE RARH 0-20mA...
Page 120 Table 117 -- VAV Control Board (ECB2) Inputs and Outputs I/O POINT POINT PLUG AND PIN POINT DESCRIPTION PORT STATE SIGNAL PIN(S) NAME NAME REFERENCE INPUTS J4, 1-2 24VAC =I,0VAC J4, 3-4 24VAC =I,0VAC 0-20mA J5, 1-3 1=24VDC, 2=0-20mA in, 3=GND Building static pressure 0-20mA J5, 4-6...
Page 121 Table 118 -- Staged Gas Control Board (SCB) Inputs and Outputs I/O POINT POINT PLUG AND PIN POINT DESCRIPTION PORT STATE SIGNAL PIN(S) NAME NAME REFERENCE INPUTS J5, 1-3 1=5v, 2=Vin, 3=GND (thermistor 1-2) (O-5VDC, thermistor, ohms) J5, 4-6 4=5v, 5=Vin, 6=GND (thermistor 4-5) (O-5VDC, thermistor, ohms) LAT1SGAS J5, 7-9...
Page 122 Table 119 -- Controls Expansion Board (CEM) Inputs POINT I/O POINT PLUG AND PIN POINT DESCRIPTION SIGNAL PIN(S) PORT STATE NAME NAME REFERENCE INPUTS Supply Fan Status switch DI 1 37, 1-2 0 = 24vac, 1= 0vac Demand Limit - SWl DI 2 J7, 3-4 0 = 24vac, 1= 0vac...
Page 123 TERMINAL ",t-- "I, © £3 TYZ - __<:::---> _nal from Comfort Link Control Fig. 31 -- VFD Wiring accurate control of the motors as well as feedback information Table 121 -- VFD Terminal Designations and diagnostics information. The control has a self-calibration TERMINAL FUNCTION routine that allows the motor position to be configured...
Page 124: Accessory Control Components
BOARD ADDRESSES -- Each board in thesystem hasan • outdoor air enthalpy curves address. The MBBhas adefault address of1butit does h ave • differential enthalpy aninstance jumper that s hould b eset t o1asshown i nFig.26. • custom curves (a combination of an enthalpy/dewpoint For t heother boards inthe system t here isa4-dip switch h ead- curve and a dry bulb curve).
Page 125 Table 122 -- Field Connection Terminal Strips TERMINAL BOARD TERMINAL DESCRIPTION TYPE TB-1 - POWER CONNECTION OR DISCONNECT (in Main Control Box) L1 power supply 208-230/460/575/380/-3-60, 400-3-50 L2 power supply 208-230/460/575/380/-3-60, 400-3-50 L3 power supply 208-230/460/575/380/-3-60, 400-3-50 TB-2 - GROUND (in Main Control Box) I Neutral...
Page 126 If the colrnnunica- Yellow LED -- The MBB has one yellow LED. The Carrier tion bus cable exits from one building and enters another, the Comfort Network R_(CCN)
Page 127 MINALS COMFORT POWERED MIXING NON CARRIER HVAC EQUIPMENT COMFORT AIR DISTRIBUTION-DIGITAL AIR VOLUME CONTROL (DAV) CONTROLLER LEGEND -- Carrier Comfort Network® -- ComfortlD Controls -- ComfortLink Controls HVAC -- Heating, Ventilation, and Air Conditioning Fig. 35 -- CON System Architecture...
Page 128: Service
SERVICE FLUE GAS PASSAGEWAYS -- The flue collector box and heat exchanger cells may be inspected by removing gas section access panel, flue box cover, collector box, and main burner as- sembly (Fig. 38 and 39). Refer to Main Burners section on page 139 for burner removal sequence.
Page 129 Totaline :R: enviromnentally sound coil cleaner is essential to ex- spraying in horizontal pattern to minimize potential tend the life of coils. This cleaner is available from Carrier Re- fm damage. placement parts division as part number P902-0301 for a one 8. Ensure cleaner thoroughly...
Page 130: Lubrication
11. Ensure s urfaces arenotallowed t o drybefore r insing. Evaporator Fan Performance Adjustment Reapplying cleaner as needed toensure 10-minute satura- (Fig. Fan motor pulleys are designed for speed tionisachieved. shown in Physical Data table in unit Installation Instructions 12. Thoroughly rinse allsurfaces withlowvelocity c lean w a- (factory speed setting).
Page 131: Evaporator Fan Service And Replacement
CENTER DRIVE FLEX SHAFT SHAFT BEARINGS SHAFT MEMBER FLANGE ===_ _= E Fig. 41 -- Evaporator Fan Coupling Outside of the unit, assemble the flex members to the cen- 6. Adjust bolts and nut on mounting plate to secure motor in ter drive shaft with 4 bolts and nuts.
Page 132: Condenser-Fan Adjustment
The regular factory setting is stamped on the valve body Refrigerant Charge Amount of refrigerant charge is (3.5 in. wg). listed on unit nameplate. Refer to Carrier GTAC II; Module 5; To adjust regulator: Charging, Recovery, Recycling, and Reclamation section for charging methods and procedures.
Page 133 20 Ton MCHX CIRCUIT A Charging Chart All Compressors on a Circuit Must be Operating All Outdoor Fans Must be Operating Reduce Charge if Above Curve _- 115 Add Charge if Below Curve Outdoor Air Temperature (deg 20 Ton MCHX CIRCUIT B Charging Chart...
Page 134 25 and 27 Ton MCHX CIRCUIT A Charging Chart All Compressors on a Circuit Must be Operating All Outdoor Fans Must be Operating _'_ 135 Reduce Charge if Above Curve '130 _o._ 110 •_ !Add Charge if Below Curve -_ g5 Outdoor Air Temperature (deg 25 and 27 Ton MCHX CIRCUIT B Charging Chart...
Page 135 30 Ton MCHX CIRCUIT A Charging Chart All Compressors on a Circuit Must be Operating All Outdoor Fans Must be Operating _'_ 135 -_130 - Reduce Charge if Above Curve •_ Add Charge if Below Curve -_ 95 0 90 Outdoor Air Temperature (deg 30 Ton MCHX CIRCUIT B Charging Chart...
Page 136 35 Ton MCHX CIRCUIT A Charging Chart All Compressors on a Circuit Must be Operating All Outdoor Fans Must be Operating :SST=55 ;SST=45 SST= -135 Reduce Char{ Above Curve _c2. 1 25 Charge if Below Curve "; © -'_ 100 Outdoor Air Temperature (deg 35 Ton MCHX CIRCUIT B Charging Chart...
Page 137 40 Ton MCHX Charging Chart All Compressors on a Circuit Must be Operating All Outdoor Fans Must be Operating Reduce Charge if Above Curve Outdoor Air Temperature (deg F) LEGEND MCHX-- Microchannel Heat Exchanger Saturated Suction Temperature Fig. 48- Charging Chart- 48/50A2,A3,A4,A5040 with R-410A Refrigerant 50 Ton MCHX Charging Chart...
Page 138 60 Ton MCHX CIRCUIT A Charging Chart All Compressors on a Circuit Must be Operating All Outdoor Fans Must be Operating ! Reduce Charge if Above Curve ._c 105 Add Charge if BelowCurve © Outdoor Air Temperature (deg F) 60 Ton MCHX CIRCUIT B Charging Chart All Compressors on a Circuit Must be Operating All Outdoor...
Page 139: Main Burners
Replace whenever refrigerant system is ex- posed to atmosphere. Replacement Parts A complete list of replacement parts may be obtained from any Carrier distributor upon request. OETAIt C SCALE t :4 1/8-1N. SCALE PIPE PLUG BURNERS SEE DETA IL VALV...
Page 140: Appendix A -- Local Display Tables
APPENDIX A -- LOCAL DISPLAY TABLES MODE -- RUN STATUS ITEM EXPANSION RANGE UNITS CCN POINT WRITE STATUS PAGE NO. VIEW AUTO VIEW OF RUN STATUS -_HVAC 90,91 ascii string spelling out the hvac modes string -_OCC YES/NO OCCUPIED forcible 90,91 Occupied ? -_MAT...
Page 141 APPENDIX A -- LOCAL DISPLAY TABLES (cont) MODE -- RUN STATUS (cont) ITEM EXPANSION RANGE UNITS CCN POINT WRITE STATUS PAGE NO. TMGD TIMEGUARDS -_ TG.A 1 CMPA1 TG Compressor A1 Timeguard -_ TG.A2 Compressor A2 Timeguard CMPA2 TG -_TG.B1 CMPB1 Compressor B1 Timeguard...
Page 142 APPENDIX A -- LOCAL DISPLAY TABLES (cont) MODE -- PRESSURES ITEM EXPANSION RANGE UNITS CCN POINT WRITE STATUS AIR.P AIR PRESSURES -*SP Static Pressure "H20 -*BP Building Pressure "H20 REF.P REFRIGERANT PRESSURES -*DP.A Cir A Discharge Pressure PSIG -*SP.A Cir A Suction Pressure PSIG -,DAB Cir B Discharge Pressure...
Page 143 APPENDIX A -- LOCAL DISPLAY TABLES (cont) MODE -- INPUTS (cont) ITEM EXPANSION RANGE UNITS CCN POINT WRITE STATUS 4-20 4-20 MILLIAMP INPUTS -dAQ.M IAQ MA IAQ Milliamps -_OAQ.M OAQ Milliamps OA_MA -_SP.R.M SPRST SP Reset milliamps -_DML.M DMDLMTMA forcible 4-20 ma Demand Signal -_EDR.
Page 144 APPENDIX A -- LOCAL DISPLAY TABLES (cont) MODE -- CONFIGURATION (cont) CCN POINT DEFAULT ITEM EXPANSION RANGE UNITS PAGE COOL COOLING CONFIGURATION -_Z. GN - 10 Z GAIN Capacity Threshold Adjst 39,46,91 OATLCOMP -_MC.LO - 55 Compressor Lockout Temp 39,48 -_C.FOD 0 - 600 COOL...
Page 145 APPENDIX A -- LOCAL DISPLAY TABLES (cont) MODE -- CONFIGURATION (cont) ITEM EXPANSION RANGE UNITS CCN POINT DEFAULT PAGE NO. BUILDING PRESS, CONFIG -_BP.CF BLDG CFG 29,64,65 Building Press, Config -_BP.RT BPIDR-ATE Bldg.Pres.PID Run Rate 5-120 64,65 -_BP.P BLDGP PG 64,65 Bldg.
Page 146 APPENDIX A -- LOCAL DISPLAY TABLES (cont) MODE -- CONFIGURATION (cont) ITEM EXPANSION RANGE UNITS CCN POINT DEFAULT PAGE NO. CCN CONFIGURATION -_CCNA CCN Address CCNADD 71,72 1 - 239 -_CCNB CCN Bus Number CCNBUS 71,72 0 - 239 -_BAUD CCN Baud Rate CCNBAUDD 71,72...
Page 147 APPENDIX A -- LOCAL DISPLAY TABLES (cont) MODE -- TIME CLOCK ITEM EXPANSION RANGE UNITS CCN POINT DEFAULT PAGE NO. TIME TIME OF DAY -_ HH. MM Hour and Minute TIME 00:00 75,77 DATE MONTH,DATE,DAY AND YEAR -_MNTH Month of Year 75,77 multi-text strings -_DOM...
Page 148: Appendix B -- Ccn Tables
In the following tables the structure of the tables which are used with the Service Tool as well as the names and data that for interface with the Carrier Comfort Network '_ (CCN) system. On TB3 there is a Jll...
Page 149 APPENDIX B E CCN TABLES (cont) STATUS DISPLAY TABLES (cont) TABLE DISPLAY NAME RANGE UNITS POINT NAME WRITE STATUS GENERAL Yes/No OCCUPIED forcible Occupied ? Static Pressure "H20 "H20 Building Pressure OARH forcible Outside Air ReI.Humidity RARH forcible Return Air ReI.Humidity SPTO forcible Space Temperature Offset...
Page 150 APPENDIX B E CCN TABLES (cont) STATUS DISPLAY TABLES (cont) TABLE DISPLAY NAME RANGE UNITS POINT NAME WRITE STATUS TEMPS Air Temp Lvg Supply Fan forcible Return Air Temperature forcible Outside Air Temperature forcible Space Temperature SPTO forcible Space Temperature Offset LAT SGAS Staged Gas LAT Sum LATI-SGAS...
Page 151 APPENDIX B E CCN TABLES (cont) SET POINT TABLE TABLE NAME RANGE UNITS POINT NAME DEFAULT SET_PNT OHSP Occupied Heat Setpoint 40-99 OCSP 40-99 Occupied Cool Setpoint UHSP 40-99 Unoccupied Heat Setpoint UCSP Unoccupied Cool Setpoint 40-99 deltaF HCSP GAP 2-10 Heat-Cool Setpoint Gap VAV Occ.
Page 152 APPENDIX B E CCN TABLES (cont) CONFIG TABLES (cont) TABLE NAME RANGE UNITS POINT NAME DEFAULT SCHEDOVR Schedule Number SCHEDNUM 0-99 Yes/No HOLIDAYT Accept Global Holidays? Override Time Limit hours Timed Override Hours hours OVR EXT Accepting an Override: SPT Override Enabled ? Yes/No SPT OVER T58 Override Enabled ?
Page 153 APPENDIX B E CCN TABLES (cont) SERVICE-CONFIG TABLES (cont) TABLE NAME RANGE UNITS POINT NAME DEFAULT COOL Z GAIN Capacity Threshold Adjust -10 -> 10 O-ATLCOMP -20 -> 55 Compressor Lockout Temp COOL 0-600 Fan-off Delay, Mech Cool Minimum Load Valve? Yes/No MLV SEL Motor Master Control ?
Page 154 APPENDIX B E CCN TABLES (cont) SERVICE-CONFIG TABLES (cont) TABLE NAME RANGE UNITS POINT NAME DEFAULT HEAT HEATTYPE Heating Control Type SASPHEAT 80-120 Heating Supply Air Setpt Yes/No HTOCCENA Occupied Heating Enabled MBB Sensor Heat Relocate Yes/No HTLATMON GAS FOD 45-600 Fan-off Delay, Gas Heat ELE(7, FOD...
Page 155 APPENDIX B E CCN TABLES (cont) SERVICE-CONFIG TABLES (cont) TABLE NAME RANGE UNITS POINT NAME DEFAULT SWLG FLTSLOGC Filter Status Inpt-Clean Open/Close Open IGC Feedback - Off GASFANLG Open/Close Open RemSw Off-Unoc-Strt-NoOv RMTINLOG Open/Close Open Economizer Switch - No ECOSWLOG Open/Close Open Fan Status Sw.
Page 156 APPENDIX B E CCN TABLES (cont) MAINTENANCE DISPLAY TABLES TABLE DISPLAY NAME RANGE UNITS POINT NAME WRITE STATUS ALARMS01 Active Alarm ascii ALARM_01 ascii Active Alarm ascii ALARM_02 ascii Active Alarm ascii ALARM_03 ascii Active Alarm ascii ALARM_04 ascii follow same format for...
Page 157 APPENDIX B E CCN TABLES (cont) MAINTENANCE DISPLAY TABLES (cont) TABLE DISPLAY NAME RANGE UNITS POINT NAME WRITE STATUS ECON MIN ECONOCMD forcible Econo Damper Command Pos ECONOPOS Econo Damper Current Pos Econo Current Min. Pos. ECMINPOS Dill.Air Quality in PPM Econo Position Override ECOORIDE forcible...
Page 158 APPENDIX B E CCN TABLES (cont) MAINTENANCE DISPLAY TABLES (cont) TABLE DISPLAY NAME RANGE UNITS POINT NAME WRITE STATUS ENTHALPY Outdoor Air Enthalpy forcible Outside Air Temperature OARH forcible Outside Air ReI.Humidity Outside Air RH Sensor OARHSENS config OADEWCFG OA Dewpoint Temp Limit config OADEWTMP OutsideAir DewPoint Temp...
Page 159 APPENDIX B E CCN TABLES (cont) MAINTENANCE DISPLAY TABLES (cont) TABLE DISPLAY NAME RANGE UNITS POINT NAME WRITE STATUS PRESBLDG "H20 Building Pressure ECONOPOS Econo Damper Current Pos Power Exhaust Stage A Power Exhaust Stage B Power Exhaust Stage C PE_C BP Load Factor BPSMZ...
Page 160 APPENDIX B E CON TABLES (cont) MAINTENANCE DISPLAY TABLES (cont) DISPLAY NAME TABLE RANGE UNITS POINT NAME WRITE STATUS TESTCOOL ON/OFF CMPA1TST Compressor A1 Relay test ON/OFF CMPA2TST test Compressor A2 Relay ON/OFF MLV TST test Min. Load Valve (HGBP) ON/OFF CMP-B1TST Compressor...
Page 161: Appendix C -- Vfd Information
APPENDIX C E VFD INFORMATION condensation from fonning on the boards during the off mode On variable air volume units with optional VFD, the supply and is stopped by driving the speed to 0 (by sending a 4 mA fan speed is controlled by a 3-phase VFD.
Page 162 ENTER (SOFT KEY 2). AUTO key is used to change control of the drive to automatic 3. Use the UP or DOWN keys to highlight Carrier Assistant control. The HAND key is used to change control of the drive and press SEL (SOFT KEY 2).
Page 163 A stationary arrow 1. Select MENU (SOFT KEY 2). The Main menu will be indicates that the drive is stopped. For Carrier rooftop units, the displayed. correct rotation is counterclockwise. 2. Use the UP or DOWN keys to highlight...
Page 164 APPENDIX C E VFD INFORMATION (cont) 5. The text "Restoring Parameters" will be displayed with a CHANGED PARAMETERS MODE -- The Changed Param- progress indicator. To stop the process, select ABORT eters mode is used to view and edit recently changed parameters (SOFT KEY 1).
Page 165 VFD requires very little maintenance. • enabling the red LED on the drive (LED is either steady Table E lists the routine maintenance intervals recommend- or flashing) ed by Carrier. • setting an appropriate bit in a Fault Word parameter...
Page 166 Contact Carrier. OPEX LINK Internal fault. A communication-related problem has been detected between the OMIO and OINT boards. Contact Carrier. OPEX PWR Internal fault. Low voltage condition detected on the OINT board. Contact Carrier. CURR MEAS Internal fault.
Page 167 APPENDIX C E VFD INFORMATION (cont) Table D -- Alarm Codes ALARM ALARM NAME DESCRIPTION AND RECOMMENDED CORRECTIVE ACTION CODE IN PANEL 2001 Reserved 2002 Reserved 2003 Reserved The change in direction being attempted is not allowed, Do not attempt to change the direction of motor rota- 2004 DIR LOCK tion, or Change parameter 1003 DIRECTION...
Page 168 Replacement fans are available from Carrier. To replace the main fan for flame sizes R1 through R4, perform the following (see Fig. D): 1. Remove power from drive. 2. Remove drive cover. 3. For flame sizes R1 and R2, press together the retaining clips on the fan cover and lift.
Page 169 APPENDIX C E VFD INFORMATION (cont) Fig. F- Internal Enclosure Fan Replacement...
Page 170: Appendix D -- Mode Selection
APPENDIX D E MODE SELECTION PROCESS The following section is to be used in conjunction with The unit is off and no operating modes are active. Fig. 4 on page 34. To help determine why the unit controls are HVAC mode: ("Tempering Vent ")
Page 171: Index
Auto view of run status mechanical thermostat Basic control usage Multi-stage constant volume units Buikling pressure contiguration with space sensor Building pressure control Power thilure Carrier Comfort Network _v (CCN) System Pressurization mode CCN tables and display Programming operating schedules CCN tables 148-160 Refrigerant...
Page 172 Copyright 2008 Carrier Corporation Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Catalog No. 04-53480050-01 Printed in U.S.A. Form 48/50A-7T Pg 172 5-08 Replaces: 48/50A-6T...
Page 173 CONTROLS SET POINT AND CONFIGURATION MODEL NUMBER: Software Version SERIAL NUMBER: CESR131343-- DATE: CESR131249-- TECHNICIAN: CESR131249-- NAVI CESR131227-- CESR131226-- CESR131174-- MARQ CESR131171-- ITEM EXPANSION RANGE DEFAULT ENTRY UNIT UNIT CONFIGURATION -_C.TYP Machine Control Type 1 - 6 (multi-text strings) -_CV.FN Fan Mode (O=Auto, l=Cont) 0 - 1 (multi-text strings) -_RM.CF...
Page 174 ITEM EXPANSION RANGE DEFAULT ENTRY HEAT HEATING CONFIGURATION -_HT.CF Heating Control Type 0 - 4 -_HT.SP Heating Supply Air Setpt 80 - 120 dF -,OC.EN Occupied Heating Enabled Yes/No -_LAT.M MBB Sensor Heat Relocate Yes/No -,G.FOD Fan-Off Delay, Gas Heat 45-600 -_E.FOD Fan-Off Delay, Elec Heat...
Page 175 ITEM EXPANSION RANGE DEFAULT ENTRY BUILDING PRESS. CONFIG -_BP.CF Building Press. Config -_BP.RT 5-120 Bldg.Pres.PID Run Rate -_BP.P Bldg. Press, Prop, Gain -_BP.I Bldg.Press.lnteg.Gain -_BP.D Bldg.Press.Deriv.Gain -_BP.SO 0.0 - 0.5 o.o5 BP Setpoint Offset -_BP.MN 0-1 O0 BP VFD Minimum Speed -_BP.MX 0-1 O0 BP VFD Maximum Speed...
Page 176 ITEM EXPANSION RANGE DEFAULT ENTRY -*AQ.S.R-*IQ.R.L IAQ Low Reference 0 - 5000 -,AQ.S.R-,IQ.R.H IAQ High Reference 0 - 5000 2000 -eAQ.S.R-eOQ.R.L OAQ Low Reference 0 - 5000 -,AQ.S.R-,OQ.R.H OAQ High Reference 0 - 5000 2000 -,IAQ.P IAQ PRE-OCCUPIED PURGE -,IAQ.P-,IQ.PG IAQ Purge Yes/No -,IAQ.P-,IQ.P.T...
Page 177 ITEM EXPANSION RANGE DEFAULT ENTRY SW.LG SWITCH LOGIC: NO / NC -_FTS.L Filter Status Inpt-Clean Open/Close Open -_IGC.L IGC Feedback - Off Open/Close Open -_RMI.L RemSw Off-Unoc-Strt-NoOv Open/Close Open -_ECS.L Economizer Switch - No Open/Close Open -_SFS.L Fan Status Sw, - Off Open/Close Open -_DL I.L...
Page 178: Unit Start-Up Checklist
PSIG CIRCUIT NO. 2 PSIG [] VERIFY REFRIGERANT CHARGE. Copyright 2008 Carrier Corporation Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Catalog No. 04-53480050-01 Printed in U.S.A. Form 48/50A-7T...

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