Carrier WEATHERMAKER 48/50AJ Operation And Service Manual Download Page 79

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Table 94 — Cooling Service Analysis (cont)

LEGEND

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. Expansion valve power head defective.

4. Replace power head.

5. Indoor coil partially iced.

5. Check low-pressure setting.

6. Indoor airflow restricted.

6. Remove obstruction.

Suction Pressure High
Heat load excessive.

Check for open doors or windows.

UNIT OPERATES TOO LONG OR CONTINUOUSLY
1. Low refrigerant charge.

1. Add refrigerant

2. Control contacts fused.

2. Replace control.

3. Air in system.

3. Purge and evacuate system.

4. Partially plugged expansion valve or filter drier.

4. Clean or replace.

SYSTEM IS NOISY
1. Piping vibration.

1. Support piping as required.

2. Compressor noisy.

2. Replace compressor.

COMPRESSOR LOSES OIL
1. Leak in system.

1. Repair leak.

2. Crankcase heaters not energized during shutdown.

2. Check wiring and relays. Check heater and replace if defective.

FROSTED SUCTION LINE
Expansion valve admitting excess refrigerant.

Adjust expansion valve.

HOT LIQUID LINE
1. Shortage of refrigerant due to leak.

1. Repair leak and recharge.

2. Expansion valve opens too wide.

2. Adjust expansion valve.

FROSTED LIQUID LINE
Restricted filter drier.

Remove restriction or replace.

INDOOR FAN CONTACTOR OPEN
1. Power off.

1. Restore power.

2. Fuses blown in field power circuit.

2. After finding cause and correcting, replace with correct fuses.

3. No control power.

3. Check secondary fuses. Replace with correct type and size.

Replace transformer if primary windings are receiving power.

INDOOR FAN CONTACTOR CLOSED
1. VFD overload function tripped.

1. Refer to separate VFD technical manual for troubleshooting

instructions.

2. Motor leads loose.

2. Check connections at motor lead junction box.

3. Motor windings open.

3. Check motor windings.

4. Single phasing.

4. Check for blown fuse. Check for loose connections at motor

junction box.

5. Belts broken or thrown.

5. Check belts. Replace as complete set if necessary.

6. Circuit breaker tripped.

6. Check for excessive current draw. Reset breaker. Replace if

defective.

ASTP —

Advanced Scroll Temperature Protection

VFD

—

Variable Frequency Drive

Summary of Contents for WEATHERMAKER 48/50AJ

Page 1: ...VFD Control 31 Supply Air Reset 31 Demand Limit Control 31 Demand Controlled Ventilation Control 31 CONTROLS OPERATION 32 75 Modes 32 SYSTEM MODES HVAC MODES Page Unit Configuration Submenu 35 Cooling Control 37 SETTING UP THE SYSTEM MACHINE DEPENDENT CONFIGURATIONS SET POINTS SUPPLY AIR RESET CONFIGURATION COOLING CONFIGURATION COMPRESSOR SAFETIES COMPRESSOR TIME GUARDS COOL MODE SELECTION PROCES...

Page 2: ...ioning equipment Untrained personnel can perform the basic maintenance functions of re placing filters Trained service personnel should perform all other operations When working on air conditioning equipment observe pre cautions in the literature tags and labels attached to the unit and other safety precautions that may apply Follow all safety codes Wear safety glasses and work gloves Use quenchin...

Page 3: ...le the IAQ Economizer Override Position which is located in the Configuration mode Indoor Air Quality Configuration sub mode and the Air Quality Set Points sub sub mode would be written as Configuration IAQ IAQ SP IQ O P A list of point names can be found in Appendix A This path name will show the user how to navigate through the local display to reach the desired configuration The user would scro...

Page 4: ...arquee the user can access a built in test routine that can be used at start up commissioning to diagnose operational prob lems with the unit Accessory Navigator Display The accessory hand held Navigator display can be used with the A Series units See Fig 2 The Navigator display operates the same way as the scrolling marquee device The Navigator display is plugged into the RJ 14 LEN jack in the ma...

Page 5: ...d users See Fig 3 for System Pilot details CCN Tables and Display In addition to the unit mounted scrolling marquee display the user can also access the same information through the CCN tables by using the Service Tool or other CCN programs Details on the CCN tables are summarized in Appendix B The variable names used for the CCN tables and the scrolling marquee tables may be different and more it...

Page 6: ...I Supply Air Setpoint Lo SA LO Heating Supply Air Setpoint SA HT Tempering Purge SASP T PRG Tempering in Cool SASP T CL Tempering in Vent Occ SASP T V OC Tempering in Vent Unocc SASP T V UN General Inputs GEN I Compressor Feedback FD BK Thermostat Inputs STAT Fire Smoke Modes FIRE Relative Humidity REL H Air Quality Sensors AIR Q Reset Inputs RSET 4 20 Milliamp Inputs 4 20 Fans FANS Cooling COOL H...

Page 7: ...ferent set point is required use the scrolling marquee Navigator accessory or Service Tool software to change the configuration valves 3 If the internal unit schedules are going to be used config ure the Occupancy schedule 4 Verify that the control time periods programmed meet current requirements 5 Using Service Test mode verify operation of all major components 6 If the unit is a VAV unit make s...

Page 8: ...28 8 46 1056 8 82 1083 9 18 1109 9 54 1135 9 91 1160 10 28 1185 10 65 11 000 1004 9 00 1032 9 36 1059 9 73 1086 10 09 1112 10 46 1138 10 84 1163 11 22 1188 11 60 12 000 1039 10 42 1066 10 79 1093 11 16 1119 11 53 1144 11 91 1169 12 30 1193 12 68 12 500 1058 11 20 1085 11 57 1110 11 94 1136 12 32 1161 12 70 1185 13 09 13 000 1077 12 03 1103 12 40 1129 12 77 1154 13 15 1178 13 54 AIRFLOW CFM AVAILAB...

Page 9: ...20 16 88 1243 17 36 1266 17 84 1288 18 32 15 000 1243 18 63 1265 19 12 1287 19 61 16 000 1290 21 06 17 000 17 500 AIRFLOW Cfm AVAILABLE EXTERNAL STATIC PRESSURE in wg 0 2 0 4 0 6 0 8 1 0 Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp 7 000 454 2 15 508 2 52 557 2 90 605 3 29 650 3 69 8 000 502 2 90 550 3 30 596 3 71 639 4 12 680 4 54 9 000 552 3 81 595 4 24 637 4 67 677 5 11 715 5 55 10 000 602 4 89 642 ...

Page 10: ... 000 AIRFLOW Cfm AVAILABLE EXTERNAL STATIC PRESSURE in wg 0 2 0 4 0 6 0 8 1 0 Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp 8 000 502 2 90 550 3 30 596 3 71 639 4 12 680 4 54 9 000 552 3 81 595 4 24 637 4 67 677 5 11 715 5 55 10 000 602 4 89 642 5 34 680 5 80 717 6 26 752 6 73 11 000 653 6 15 689 6 62 725 7 11 759 7 59 792 8 08 12 000 704 7 60 738 8 09 771 8 60 803 9 11 834 9 63 13 000 756 9 24 788 9 76...

Page 11: ...wg 0 2 0 4 0 6 0 8 1 0 Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp 10 000 419 2 89 483 3 54 538 4 25 587 5 00 632 5 79 12 000 476 4 33 534 5 04 585 5 78 632 6 56 674 7 39 13 000 506 5 21 561 5 94 610 6 70 655 7 50 697 8 34 14 000 536 6 18 588 6 96 636 7 74 680 8 56 720 9 41 15 000 566 7 28 617 8 09 662 8 90 704 9 73 744 10 59 16 000 597 8 48 645 9 34 689 10 17 730 11 02 768 11 90 17 000 628 9 80 674 1...

Page 12: ...3 11 1083 24 21 1108 25 33 1132 26 46 1156 27 60 1178 28 74 19 000 1027 22 72 1054 23 81 1080 24 92 1105 26 04 1129 27 18 1153 28 33 1176 29 48 1199 30 65 20 000 1050 24 65 1076 25 76 1102 26 88 1126 28 01 1151 29 17 1174 30 33 1197 31 50 21 000 1073 26 73 1099 27 84 1124 28 97 1149 30 13 1173 31 29 1196 32 47 22 000 1097 28 95 1123 30 08 1147 31 22 1172 32 39 1195 33 56 23 000 1122 31 33 1147 32 ...

Page 13: ...154 10 83 1179 11 13 13 000 1031 10 50 1058 10 80 1083 11 10 1109 11 40 1133 11 71 1158 12 01 1182 12 32 14 000 1067 12 10 1092 12 41 1117 12 71 1141 13 02 1165 13 33 1188 13 65 15 000 1104 13 88 1128 14 19 1152 14 50 1175 14 81 1198 15 13 AIRFLOW Cfm AVAILABLE EXTERNAL STATIC PRESSURE in wg 0 2 0 4 0 6 0 8 1 0 1 2 1 4 1 6 1 8 2 0 Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp Rpm...

Page 14: ... 1073 12 95 1099 13 47 1124 14 00 1149 14 53 1173 15 07 12 000 1096 14 58 1121 15 11 1145 15 65 1169 16 19 1192 16 74 13 000 1121 16 40 1145 16 95 1168 17 50 1191 18 06 1214 18 62 14 000 1149 18 42 1172 18 98 1195 19 55 1217 20 12 1239 20 69 15 000 1179 20 63 1201 21 21 1223 21 80 1244 22 38 1265 22 97 16 000 1211 23 06 1232 23 66 1253 24 26 1274 24 86 1294 25 46 17 000 1245 25 69 1265 26 31 1285 ...

Page 15: ...9 18 42 1172 18 98 1195 19 55 1217 20 12 1239 20 69 15 000 1179 20 63 1201 21 21 1223 21 80 1244 22 38 1265 22 97 16 000 1211 23 06 1232 23 66 1253 24 26 1274 24 86 1294 25 46 17 000 1245 25 69 1265 26 31 1285 26 93 18 000 1279 28 54 1299 29 18 19 000 20 000 AIRFLOW Cfm AVAILABLE EXTERNAL STATIC PRESSURE in wg 0 2 0 4 0 6 0 8 1 0 1 2 1 4 1 6 1 8 2 0 Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp ...

Page 16: ...0 23 22 1122 24 25 1144 25 29 17 000 1071 22 73 1095 23 74 1117 24 76 1140 25 80 1161 26 85 18 000 1090 24 37 1113 25 40 1136 26 43 1158 27 48 1179 28 54 19 000 1109 26 15 1132 27 19 1154 28 24 1176 29 29 1197 30 36 20 000 1128 28 06 1151 29 11 1173 30 17 1195 31 24 21 000 1148 30 11 1171 31 17 1193 32 25 22 000 1169 32 30 1191 33 38 23 000 1190 34 64 24 000 25 000 AIRFLOW Cfm AVAILABLE EXTERNAL S...

Page 17: ...1146 10 69 1171 11 12 1195 11 56 10 000 993 8 96 1021 9 38 1048 9 80 1075 10 23 1101 10 67 1126 11 11 1151 11 55 1176 12 00 1200 12 45 11 000 1031 10 37 1058 10 80 1084 11 23 1110 11 67 1135 12 12 1160 12 56 1184 13 02 12 000 1071 11 97 1097 12 41 1123 12 85 1148 13 30 1172 13 75 1196 14 21 12 500 1092 12 85 1118 13 29 1143 13 74 1167 14 19 1191 14 64 13 000 1113 13 78 1139 14 22 1163 14 67 AIRFLO...

Page 18: ...Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp 7 000 475 2 29 527 2 66 576 3 05 622 3 44 666 3 84 8 000 526 3 10 573 3 50 617 3 91 660 4 33 700 4 75 9 000 579 4 08 621 4 51 662 4 95 701 5 39 738 5 83 10 000 633 5 24 671 5 70 709 6 16 744 6 62 779 7 09 11 000 687 6 59 723 7 07 757 7 56 790 8 05 823 8 54 12 000 742 8 15 775 8 65 807 9 17 838 9 68 868 10 20 13 000 797 9 92 827 10 45 857 10 98 887 11 52 915 12 07 14...

Page 19: ...88 19 000 20 000 AIRFLOW Cfm AVAILABLE EXTERNAL STATIC PRESSURE in wg 0 2 0 4 0 6 0 8 1 0 Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp 8 000 526 3 10 573 3 50 617 3 91 660 4 33 700 4 75 9 000 579 4 08 621 4 51 662 4 95 701 5 39 738 5 83 10 000 633 5 24 671 5 70 709 6 16 744 6 62 779 7 09 11 000 687 6 59 723 7 07 757 7 56 790 8 05 823 8 54 12 000 742 8 15 775 8 65 807 9 17 838 9 68 868 10 20 13 000 797 ...

Page 20: ...60 7 10 701 7 93 13 000 550 5 80 600 6 56 646 7 34 688 8 15 727 9 00 14 000 584 6 90 632 7 69 676 8 50 716 9 33 754 10 20 15 000 619 8 13 664 8 96 706 9 79 745 10 65 782 11 53 16 000 654 9 49 697 10 36 737 11 22 775 12 10 811 13 00 17 000 689 10 99 730 11 90 769 12 79 806 13 69 840 14 61 18 000 725 12 64 764 13 58 801 14 51 837 15 43 870 16 38 19 000 760 14 43 798 15 41 834 16 37 868 17 32 900 18 ...

Page 21: ...20 25 01 1144 26 13 1167 27 27 1190 28 42 18 000 1045 22 48 1070 23 57 1096 24 67 1120 25 79 1144 26 93 1167 28 07 1190 29 23 19 000 1071 24 49 1096 25 59 1121 26 71 1145 27 84 1169 28 99 1192 30 16 20 000 1098 26 66 1123 27 77 1147 28 90 1171 30 05 1194 31 21 21 000 1125 28 99 1150 30 12 1173 31 26 1197 32 42 22 000 1153 31 49 1177 32 63 23 000 1181 34 16 24 000 25 000 26 000 27 000 AIRFLOW CFM A...

Page 22: ...151 11 11 1175 11 47 1198 11 82 12 000 1030 10 43 1057 10 78 1083 11 14 1108 11 51 1133 11 87 1157 12 24 1181 12 61 13 000 1068 12 04 1093 12 40 1119 12 77 1143 13 14 1167 13 52 1191 13 89 14 000 1107 13 83 1131 14 20 1156 14 58 1179 14 96 15 000 1147 15 82 1171 16 19 1194 16 58 AIRFLOW Cfm AVAILABLE EXTERNAL STATIC PRESSURE in wg 0 2 0 4 0 6 0 8 1 0 1 2 1 4 1 6 1 8 2 0 Rpm Bhp Rpm Bhp Rpm Bhp Rpm...

Page 23: ...55 1080 11 05 1107 11 56 1133 12 08 1158 12 60 10 000 1073 11 89 1100 12 41 1125 12 93 1151 13 45 1175 13 99 11 000 1097 13 43 1122 13 96 1147 14 49 1171 15 02 1195 15 56 12 000 1123 15 17 1147 15 71 1171 16 25 1195 16 80 1218 17 35 13 000 1152 17 12 1175 17 67 1198 18 22 1221 18 78 1243 19 35 14 000 1184 19 27 1206 19 84 1228 20 41 1250 20 99 1271 21 56 15 000 1217 21 65 1239 22 23 1260 22 82 128...

Page 24: ...11 89 1100 12 41 1125 12 93 1151 13 45 1175 13 99 11 000 1097 13 43 1122 13 96 1147 14 49 1171 15 02 1195 15 56 12 000 1123 15 17 1147 15 71 1171 16 25 1195 16 80 1218 17 35 13 000 1152 17 12 1175 17 67 1198 18 22 1221 18 78 1243 19 35 14 000 1184 19 27 1206 19 84 1228 20 41 1250 20 99 1271 21 56 15 000 1217 21 65 1239 22 23 1260 22 82 1280 23 41 16 000 1253 24 25 1273 24 85 1293 25 45 17 000 1289...

Page 25: ...2 1063 20 41 1086 21 41 1109 22 43 1131 23 46 15 000 1060 20 83 1083 21 84 1106 22 85 1128 23 88 1150 24 92 16 000 1081 22 39 1104 23 40 1126 24 43 1148 25 47 1170 26 52 17 000 1102 24 07 1125 25 10 1147 26 14 1169 27 19 1190 28 26 18 000 1124 25 91 1147 26 94 1169 28 00 1190 29 06 19 000 1147 27 89 1169 28 94 1190 30 00 20 000 1170 30 01 1192 31 08 21 000 1194 32 30 22 000 23 000 24 000 25 000 AI...

Page 26: ... 7 23 0 19 183 91 0 25 18 65 28 9 21 56 73 0 23 511 91 7 29 4 21 93 37 4 28 4 23 918 91 7 30 22 38 35 6 26 56 91 0 28 742 92 4 34 7 25 89 43 8 36 3 28 015 92 4 40 29 84 42 0 31 33 110 0 55 0 43 8 33 690 93 0 PREMIUM EFFICIENCY MOTORS Nominal Maximum Maximum Amps Maximum Watts Maximum Efficiency Bhp BkW Bhp BkW 230 v 460 v 5 3 73 5 9 4 40 15 8 7 9 4 918 89 5 7 5 5 6 8 7 6 49 23 5 7 078 91 7 9 5 7 0...

Page 27: ...to configure the control to use local schedules 8 Under the Timeclock SCH L submenu enter the desired schedule See Time Clock Configuration section on page 75 for further description of these configurations 9 Under the Configuration CCN SC OV submenu the following schedules and overrides should be configured 10 See Economizer Options section on page 28 for addition al economizer option configurati...

Page 28: ...iguration UNIT C TYP set C TYP to 5 SPT MULTI 2 Install jumpers between R W2 and W2 W1 on TB4 in the control box 3 Under the Setpoints menu the following configurations should be set 4 The degrees of demand from the space temperature set points are configured under the Configuration D LV T submenu See the Heating Control and Cooling Control sections for further description on these configurations ...

Page 29: ...od 1 UNC Scroll down to UNC and press ENTER to go into Edit mode The first two digits of the 00 00 will start flashing Use the UP or DOWN key to display the correct value for hours in 24 hour military time Press ENTER and hour value is saved and the minutes digits will start flashing Use the same procedure to display and save the desired minutes value Press ESCAPE 5 Scroll to DAYS and press ENTER ...

Page 30: ...he unit control box Remember to disconnect these jumpers when Test Mode is completed The Heat Test Mode sub mode will offer automatic fan start up if the unit is not a gas heat unit On gas heat units the IGC feed back from the gas control units will bring the fan on as required Within this sub mode the user has control of heat relays 1 to 6 The user can also turn on the requested heat stage NOTE W...

Page 31: ...to 20 mA input that can reduce or limit capacity linearly to a set point percentage In either case it will be necessary to install a controls ex pansion module CEM DEMAND LIMIT DISCRETE INPUTS First set DM L S in Configuration DMD L to 1 2 switches When Inputs GEN I DL S1 Demand Switch no 1 is OFF the control will not set any limit to the capacity and when ON the control sets a capacity limit to t...

Page 32: ...osition Configuration IAQ DCV C EC MN is overridden and the damper is moved to the IQ P O configuration When the DAQ falls below the DAQ L set point Configuration IAQ AQ SP menu the economizer damper is moved back to the minimum vent position EC MN NOTE Configuration OAQ U is used in the calculation of the trip point for override and can be found under Configura tion IAQ AQ SP IQ A C 3 4 to 20 mA ...

Page 33: ...ng IAQ etc is possible There are two possible text displays for this mode one is normal run mode and the other occurs if one of the following fire smoke modes is present smoke purge pressurization or evacuation 1 Normal run time state Unit Operation Enabled 2 Fire Smoke control mode Fire Smoke Control HVAC MODES Operating Mode HVAC The system mode must be selected before the unit controls can sele...

Page 34: ...atic Pres Fail Config UNIT SFS M 1 OR 2 AND Config UNIT SFS S YES HVAC Mode OFF Fan Status Fail HVAC Mode OFF Starting Up Unit shutting down HVAC Mode Shutting Down Unit control free to select normal heating cooling HVAC mode HVAC Mode OFF HVAC Mode Tempering Vent HVAC Mode Tempering LoCool HVAC Mode Tempering HiCool HVAC Mode Vent HVAC Mode Low Cool HVAC Mode High Cool HVAC Mode Low Heat HVAC Mod...

Page 35: ...mperature will be used in the determination of the selection of a cooling mode VAV SPT differs from VAV RAT only in that during the unoccupied period space temperature will be used instead of return air temperature to start the fan for 10 minutes to establish an accurate return air temperature before the return air temper ature is allowed to call out any mode C TYP 3 TSTAT MULTI This configuration...

Page 36: ...figuration specifies the type of refrigerant used in the unit Configuration RFG T is set to 0 if the refrigerant used is R 22 Configuration RFG T is set to 1 if the refrigerant used is R 410A Do not change this setting Condenser Type CND T This configuration specifies the type of condenser installed in the unit Configuration CND T is set to 0 if the condenser is a round tube plate fin coil RTPF Co...

Page 37: ...acity as well as low load coil freeze protection The con trol also integrates the use of an economizer with the use of mechanical cooling to allow for the greatest use of free cool ing When both mechanical cooling and the economizer are being used the control will use the economizer to provide bet ter temperature control and limit the cycling of the compres sors The control also checks on various ...

Page 38: ...n of the final amount of reset to be applied Inputs RSET SA S R 2 RAT RESET Return air temperature will be used as the reset control vari able along with both RTIO and LIMT in the calculation of the final amount of reset to be applied Inputs RSET SA S R 3 3RD PARTY RESET The reset value is determined by a 4 to 20 mA third party input An input of 4 mA would correspond to 0º F reset An input of 20 m...

Page 39: ...able or disable the compressor B2 feedback alarm This configuration must be enabled at all times Reverse Rotation Verified REV R If this configuration is set to NO then after a power up in the normal run mode the control will check the suction pressure on the first circuit that is energized after 5 seconds of run time If the control does not see a sufficient decrease in suction pressure over the f...

Page 40: ... occupancy and the modes are called out directly by the discrete inputs from the thermo stat Inputs STAT Y1 and Y2 2 Occupied VAV cooling types C TYP 1 and 2 are called out in the occupied period Operating Modes MODE OCC ON 3 Unoccupied VAV cooling types C TYP 1 and 2 are called out in the unoccupied period Operating Modes MODE OCC OFF They are also used for space sensor control types C TYP 5 and ...

Page 41: ...pied or in temperature compensated start mode the occupied cooling set point OCSP is used For all other modes the unoccupied cooling set point UCSP is used For further discussion and simplification this will be referred to as the cooling set point See Fig 8 Demand Level Low Cool On Offset L C ON This is the cooling set point offset added to the cooling set point at which point a Low Cool mode star...

Page 42: ...ion will explain how compressors are staged and the timing involved for both the Low Cool and High Cool HVAC Modes There are either three or four compressors divided among two refrigeration circuits Circuit A always contains two compressors Outputs COOL A1 and A2 Circuit B has either one com pressor Outputs COOL B1 on size 020 027 units or two compressors Outputs COOL B1 and B2 on size 030 060 uni...

Page 43: ...ef fect respectively If one stage of mechanical cooling is on and the economiz er is active then the economizer will attempt to control to 53 F Also If HVAC mode LOW COOL the second stage of mechanical cooling will be locked out If the set point cannot be satisfied or the economizer is not active then cooling will be brought on one stage at a time when the evaporator discharge temperature EDT is g...

Page 44: ...50 75 100 0 25 50 50 75 100 060 0 24 50 50 74 100 0 26 50 50 76 100 STAGE SEQUENCE 1 SEQUENCE 2 0 1 2 3 4 5 6 0 1 2 3 4 5 6 COMP Compressor Status Compressor Status A1 OFF ON ON ON OFF ON ON OFF OFF OFF ON ON ON ON A2 OFF OFF OFF ON ON ON ON OFF ON ON ON OFF ON ON B1 OFF OFF OFF OFF ON ON ON OFF OFF OFF OFF OFF OFF ON B2 OFF OFF OFF OFF OFF OFF ON OFF OFF ON OFF ON ON ON UNIT Unit Capacity 48 50A ...

Page 45: ...N ON UNIT Unit Capacity 48 50A Unit Capacity 48 50A 020 0 10 30 70 100 0 10 30 70 100 025 0 17 33 67 100 0 17 33 67 100 027 0 17 33 67 100 0 17 33 67 100 STAGE SEQUENCE 1 SEQUENCE 2 0 1 2 3 4 0 1 2 3 4 COMP Compressor Status Compressor Status A1 OFF ON ON ON ON OFF OFF ON OFF ON A2 OFF OFF OFF ON ON OFF ON OFF ON ON B1 OFF OFF ON ON ON OFF OFF ON ON ON B2 OFF OFF OFF OFF ON OFF OFF OFF ON ON UNIT ...

Page 46: ...capacity by taking the next step up 0 2 times 20 4 F ADD R Next Stage EDT Increase SUB R This variable repre sents if subtracting a stage of cooling how much the temperature should rise in degrees depending on the R PCT calculation and exactly how much capacity is to be subtracted SUB R R PCT C CAP capacity after subtracting a cooling stage For Example If R PCT 0 2 and the control would be sub tra...

Page 47: ...e calcula tion of SumZ are 1 the rise per percent capacity R PCT 2 the amount of expected rise for the next cooling stage addition 3 the amount of expected rise for the next cooling stage subtraction The calculation of Z requires two variables Z PLU used when adding a stage and Z MIN used when subtracting a stage They are calculated with the following formulas Z PLU Z GN 10 4 ADD R 0 6 Z MIN Z GN ...

Page 48: ...g in 3 ways Two discrete inputs tied to configurable demand limit set point percentages An external 4 to 20 mA input that can reset capacity back linearly to a set point percentage CCN loadshed functionality NOTE It is also possible to force the demand limit variable Run Status COOL DEM L To use Demand Limiting select the type of demand limiting to use This is done with the Demand Limit Select con...

Page 49: ...the condenser fan relay A MBB Relay 6 output must be ener gized to enable the Motormaster V control and must not be turned off by the head pressure control algorithm The size 60 ton unit with RTPF condenser heat exchangers offers 3 stages of head pressure control and is the one case where condenser fan relay A may be requested off during head pressure control operation By configuring M M to YES th...

Page 50: ...CONOMIZER INTEGRATION WITH MECHANICAL COOLING When the economizer is able to provide free cooling Run Status ECON ACTV YES mechanical cooling may be delayed or even held off indefinitely NOTE Once mechanical cooling has started this delay logic is no longer relevant Economizer Mechanical Cooling Delay This type of me chanical cooling delay is relevant to the all machine control types If the econom...

Page 51: ...ient heating demand there are still conditions that will prevent the unit from selecting a heat mode First the unit must be configured for a heat type Configuration HEAT HT CF not equal to NONE Second the unit has a configuration which can enable or disable heating in the occupied period except for a standard morning warmup cycle Configuration HEAT OC EN See descriptions above in the Setting Up th...

Page 52: ...cified by H T TM in order to hold off a HIGH HEAT mode regardless of demand This is not applicable to VAV control types C TYP 1 and 2 in the occupied period This method of operation has been referred to as Comfort Trending As long as a LOW HEAT mode is making progress in warming the space the con trol will hold off on a HIGH HEAT mode This is relevant for the space sensor machine control types C T...

Page 53: ...is configuration is the PID run time rate Staged Gas Heating Logic If the HVAC mode is HIGH HEAT The supply fan for staged gas heating is controlled by the integrated gas control IGC boards and unless the supply fan is on for a different reason it will be con trolled by the IGC indoor fan input Command all stages of heat ON If the HVAC mode is LOW HEAT The supply fan for staged gas heating is cont...

Page 54: ...ly When energized an LED on the IGC board will be turned on See Table 74 for LED explanations Each board will ensure that the rollout switch and limit switch are closed The induced draft motor is then energized When the speed of the motor is proven with the Hall Effect sensor on the motor the ignition activation period begins The burners ignite within 5 seconds If the burners do not light there is...

Page 55: ... 2 ON ON OFF OFF OFF OFF 50 3 ON OFF ON OFF OFF OFF 75 4 ON ON ON OFF OFF OFF 87 5 ON ON ON ON OFF OFF 100 STAGE RELAY OUTPUT CAPACITY Heat 1 Heat 2 Heat 3 Heat 4 Heat 5 Heat 6 MBB RLY8 MBB RLY7 SCB RLY1 SCB RLY2 SCB RLY3 SCB RLY4 IGC1 MGV1 IGC2 MGV2 IGC3 MGV3 0 OFF OFF OFF OFF OFF OFF 0 1 ON OFF OFF OFF OFF OFF 25 2 ON ON OFF OFF OFF OFF 33 3 OFF OFF ON OFF OFF OFF 50 4 OFF OFF ON ON OFF OFF 67 5...

Page 56: ... AND Heat Mode in effect AND LAT is warm enough or is to be ignored due to placement The unit just went into occupied mode and there has been no cooling mode yet and a heat cycle occurs or was in prog ress when the unit went occupied In both cases if and when the heat mode terminates a heat cycle has occurred and any subsequent heat cycles will not be treated as a morning warm up period TEMPERING ...

Page 57: ...e config ured a PID routine periodically measures the duct static pressure and calculates the error from set point This error is simply the duct static pressure set point minus the measured duct static pressure The error becomes the basis for the propor tional term of the PID The routine also calculates the integral of the error over time and the derivative rate of change of the error A value is c...

Page 58: ... MX will override Note that SP CF must be set to 1 VFD Control prior to configuring SP RS 4 Failure to do so could result in damage to ductwork due to overpressurization This is the recommended approach if a third party wishes to control the variable speed supply fan In effect this represents a speed control signal pass through under normal operating circumstances The ComfortLink con trol system o...

Page 59: ...itions For example a system design requirement may be 1 2 in wg the equipment may be capable of providing 3 0 in wg and the supply duct is designed for 5 0 in wg In this case the installer could enter 3 0 in wg as the supply static pressure set point and allow the air terminal system to dynami cally adjust the supply duct static pressure set point as required The system will determine the actual s...

Page 60: ...Refer to the accessory installation instructions for information on adjusting the switch Economizer The economizer control is used to manage the outside and return air dampers of the unit to provide venti lation air as well as free cooling based on several configuration options This section contains a description of the economizer and its ability to provide free cooling See the section on Indoor A...

Page 61: ... selected and outside air temperature is greater than return air temperature free cooling will not be allowed Outdoor Enthalpy Changeover This option should be used in climates with higher humidity conditions The A Series control can use an enthalpy switch or enthalpy sensor or the standard installed outdoor dry bulb sensor and an accessory relative humidity sensor to calculate the enthalpy of the...

Page 62: ...gure the type of unoc cupied economizer free cooling control that is desired 0 disable unoccupied economizer free cooling 1 perform unoccupied economizer free cooling as available during the entire unoccupied period 2 perform unoccupied economizer free cooling as available FC TM minutes before the next occupied period Unoccupied Economizer Free Cooling Time Configuration FC TM This option is a con...

Page 63: ... economizer must determine exactly what set point it should try to maintain The set point the economizer attempts to maintain when free cooling is located at Run Status VIEW EC C P This is the economizer control point The control selects set points differently based on the control type of the unit This control type can be found at Configuration UNIT C TYP There are 6 types of control C TYP 1 VAV R...

Page 64: ...enabled This is automatically enabled when BP CF 2 or 3 Building Pressure Range BP R This configuration establishes the range in in wg that a 4 to 20 mA sensor will be scaled to The control only allows sensors that measure both positive and negative pressure Building Pressure SETP BP SP This set point is the building pressure control set point If the unit is configured for modulating building pres...

Page 65: ...B CFG BP TM building pressure timer This control function is allowed to add or select power ex haust stages at any time except that a delay time must expire after a stage is added or subtracted Any time a stage change is made a timer is started which delays staging for 10 BP TM seconds The default for BP TM is 1 therefore the delay between stage changes is set to 10 seconds The logic to add or sub...

Page 66: ... puts and the corresponding alarm is initiated when a mode is activated The fire system provides a normally closed dry con tact closure Multiple smoke control inputs sensed by the con trol will force the unit into a Fire Shutdown mode FIRE SMOKE INPUTS These discrete inputs can be found on the local display under Inputs FIRE Fire Shutdown Mode This mode will cause an immediate and complete shutdow...

Page 67: ... EC MN value is the design value for maximum occupancy The logic that is used to control the dampers in response to IAQ conditions is shown in Fig 12 The ComfortLink con trols will begin to open the damper from the IAQ M position when the IAQ level begins to exceed the OAQ level by a configurable amount which is referred to as Differential Air Quality Low Limit DAQ L If OAQ is not being measured O...

Page 68: ... IAQ Discrete Input with Minimum Position Override This will indicate that the IAQ level high or low will be indicated by the discrete input and the economizer minimum position will be the IAQ override position IQ O P when high It is also necessary to configure how the fan operates when using the IAQ discrete input IAQ Discrete Fan Config Configuration IAQ AQ CF IQ I F This is used to configure th...

Page 69: ...Q IAQ P IQ P H If this mode is enabled the indoor fan and heat interlock relay VAV will be energized IAQ Purge Configuration IAQ IAQ P IQ PG This is used to enable IAQ pre occupancy purge IAQ Purge Duration Configuration IAQ IAQ P IQ P T This is the maximum amount of time that a purge can occur IAQ Purge Lo Temp Min Pos Configuration IAQ IAQ P IQ P L This is used to configure a low limit for dampe...

Page 70: ...e in a Cool HVAC mode one of the following conditions must be true The space is occupied and the humidity is greater than the relative humidity trip point D RH S The space is occupied and the discrete humidity input is closed Dehumidification and Reheat Control If a dehumidifica tion mode is initiated the rooftop will attempt to lower humidity as follows Economizer Cooling The economizer if allowe...

Page 71: ...ge Equipment Table if the unit is controlled in DAV mode If the Unoccupied Economizer Free Cool mode is active Operating Modes HVAC UNOCC FREE COOL when temperature com pensated start begins the Unoccupied Free Cool mode will be stopped Carrier Comfort Network CCN System It is possible to configure the ComfortLink control to partici pate as an element of the Carrier Comfort Network CCN sys tem dir...

Page 72: ...he evaporator discharge temperature is above the configurable occupied EDT High Alert Limit SA H O then Alert 303 will be generated and heating operation will be stopped but cooling operation will continue The alert will automatically reset EDT Low Alert Limit Unocc SA L U If the evaporator discharge temperature is below the configurable unoccupied EDT Low Alert Limit SA L U then Alert 302 will be...

Page 73: ...g The sensor reading can be adjusted 10 F to match the actual measured temperature Circuit A Saturated Condenser Temperature Trim CTA T This variable is used to adjust the saturated condenser tempera ture sensor reading for circuit A The sensor reading can be adjusted 30 F to match the actual measured temperature Used on 48 50AJ AK AW AY units only Circuit B Saturated Condenser Temperature Trim CT...

Page 74: ...sed IAQ Discrete Input Low IAQ L The IAQ discrete in put is set for normally open when low If a field supplied IAQ discrete input is used that is normally closed change this vari able to closed Fire Shutdown Off FSD L The fire shutdown input is set for normally open when off If a field supplied fire shut down input is used that is normally closed change this variable to closed Pressurization Switc...

Page 75: ... CONFIGURATION This section describes each Time Clock menu item Not every point will need to be configured for every unit Refer to the Controls Quick Start section for more information on what set points need to be configured for different applications The Time Clock menu items are discussed in the same order that they are displayed in the Time Clock table The Time Clock table is shown in Table 93...

Page 76: ...ch period is assigned an occupied on and off time If this variable is set to YES then holidays will be included in that period s occu pied time schedule If this variable is set to NO then the period s occupied time schedule will not be used on holidays This vari able can be set for Periods 1 through 8 Occupied From PER X OCC This variable is used to configure the start time of the Occupied period ...

Page 77: ...1 Connect the digital voltmeter across the appropriate thermistor terminals at the J8 terminal strip on the main base board 2 Using the voltage reading obtained read the sensor tem perature from Tables 97 100 3 To check thermistor accuracy measure temperature at probe location with an accurate thermocouple type temperature measuring instrument Insulate thermocou ple to avoid ambient temperatures f...

Page 78: ...rature 3 Single phasing 3 Check for blown fuse Check for loose connection at compressor terminal 4 ASTP activated 48 50A2 A3 A4 A5 only 4 Allow 30 to 120 minutes for cool down See Compressor Safeties section on page 39 COMPRESSOR STOPS ON HIGH PRESSURE Outdoor Fan On 1 High pressure switch faulty 1 Replace switch 2 Airflow restricted 2 Remove obstruction 3 Air recirculating 3 Clear airflow area 4 ...

Page 79: ...d replace if defective FROSTED SUCTION LINE Expansion valve admitting excess refrigerant Adjust expansion valve HOT LIQUID LINE 1 Shortage of refrigerant due to leak 1 Repair leak and recharge 2 Expansion valve opens too wide 2 Adjust expansion valve FROSTED LIQUID LINE Restricted filter drier Remove restriction or replace INDOOR FAN CONTACTOR OPEN 1 Power off 1 Restore power 2 Fuses blown in fiel...

Page 80: ...uration Adjust mini mum position using ComfortLink scrolling marquee Limit switch cycles main burners Check rotation of blower thermostat heat anticipator set tings and temperature rise of unit Adjust as needed Poor Flame Characteristics Incomplete combustion lack of combustion air results in Aldehyde odors CO sooting flame or floating flame Check all screws around flue outlets and burner compart ...

Page 81: ...81 Fig 14 IGC Service Analysis Logic LEGEND NOTE Thermostat Fan Switch in the AUTO position IDM Induced Draft Motor IGC Integrated Gas Unit Controller A48 5656 ...

Page 82: ...9 3 906 88 1 298 3 814 89 1 278 3 726 90 1 257 3 640 91 1 237 3 556 92 1 217 3 474 93 1 198 3 395 94 1 179 3 318 95 1 160 3 243 96 1 141 3 170 97 1 122 3 099 98 1 104 3 031 99 1 086 2 964 100 1 068 2 898 101 1 051 2 835 102 1 033 2 773 103 1 016 2 713 104 0 999 2 655 105 0 983 2 597 106 0 966 2 542 107 0 950 2 488 108 0 934 2 436 109 0 918 2 385 110 0 903 2 335 111 0 888 2 286 112 0 873 2 239 113 ...

Page 83: ...0 5 225 25 1 538 5 000 26 1 497 4 786 27 1 457 4 583 28 1 417 4 389 29 1 378 4 204 30 1 340 4 028 31 1 302 3 861 32 1 265 3 701 33 1 229 3 549 34 1 194 3 404 35 1 160 3 266 36 1 126 3 134 37 1 093 3 008 38 1 061 2 888 39 1 030 2 773 40 0 999 2 663 41 0 969 2 559 42 0 940 2 459 43 0 912 2 363 44 0 885 2 272 45 0 858 2 184 46 0 832 2 101 47 0 807 2 021 48 0 782 1 944 49 0 758 1 871 50 0 735 1 801 51...

Page 84: ...88 2 173 7 685 89 2 144 7 507 90 2 115 7 333 91 2 087 7 165 92 2 059 6 999 93 2 030 6 838 94 2 003 6 683 95 1 975 6 530 96 1 948 6 383 97 1 921 6 238 98 1 894 6 098 99 1 867 5 961 100 1 841 5 827 101 1 815 5 698 102 1 789 5 571 103 1 763 5 449 104 1 738 5 327 105 1 713 5 210 106 1 688 5 095 107 1 663 4 984 108 1 639 4 876 109 1 615 4 769 110 1 591 4 666 111 1 567 4 564 112 1 544 4 467 113 1 521 4 ...

Page 85: ...68 20 4 533 97 060 19 4 508 91 588 18 4 482 86 463 17 4 455 81 662 16 4 426 77 162 15 4 397 72 940 14 4 367 68 957 13 4 335 65 219 12 4 303 61 711 11 4 269 58 415 10 4 235 55 319 9 4 199 52 392 8 4 162 49 640 7 4 124 47 052 6 4 085 44 617 5 4 044 42 324 4 4 003 40 153 3 3 961 38 109 2 3 917 36 182 1 3 873 34 367 0 3 828 32 654 1 3 781 31 030 2 3 734 29 498 3 3 686 28 052 4 3 637 26 686 5 3 587 25 ...

Page 86: ... 900 170 3 900 20 0 900 71 1 920 121 2 920 171 3 920 21 0 920 72 1 940 122 2 940 172 3 940 22 0 940 73 1 960 123 2 960 173 3 960 23 0 960 74 1 980 124 2 980 174 3 980 24 0 980 75 2 000 125 3 000 175 4 000 25 1 000 76 2 020 126 3 020 176 4 020 26 1 020 77 2 040 127 3 040 177 4 040 27 1 040 78 2 060 128 3 060 178 4 060 28 1 060 79 2 080 129 3 080 179 4 080 29 1 080 80 2 100 130 3 100 180 4 100 30 1 ...

Page 87: ...58 3 005 363 4 039 48 0 938 154 1 982 259 3 015 364 4 049 49 0 948 155 1 992 260 3 025 365 4 059 50 0 958 156 2 001 261 3 035 366 4 068 51 0 968 157 2 011 262 3 045 367 4 078 52 0 978 158 2 021 263 3 055 368 4 088 53 0 988 159 2 031 264 3 064 369 4 098 54 0 997 160 2 041 265 3 074 370 4 108 55 1 007 161 2 051 266 3 084 371 4 118 56 1 017 162 2 060 267 3 094 372 4 128 57 1 027 163 2 070 268 3 104 3...

Page 88: ... 130 1 208 211 1 705 292 2 201 50 0 718 131 1 214 212 1 711 293 2 207 51 0 724 132 1 220 213 1 717 294 2 213 52 0 730 133 1 226 214 1 723 295 2 220 53 0 736 134 1 233 215 1 729 296 2 226 54 0 742 135 1 239 216 1 735 297 2 232 55 0 748 136 1 245 217 1 741 298 2 238 56 0 754 137 1 251 218 1 747 299 2 244 57 0 761 138 1 257 219 1 754 300 2 250 58 0 767 139 1 263 220 1 760 301 2 256 59 0 773 140 1 269...

Page 89: ...374 2 704 457 3 213 540 3 721 623 4 230 375 2 710 458 3 219 541 3 728 624 4 236 376 2 716 459 3 225 542 3 734 625 4 243 377 2 722 460 3 231 543 3 740 626 4 249 378 2 728 461 3 237 544 3 746 627 4 255 379 2 734 462 3 243 545 3 752 628 4 261 380 2 741 463 3 249 546 3 758 629 4 267 381 2 747 464 3 256 547 3 764 630 4 273 382 2 753 465 3 262 548 3 770 631 4 279 383 2 759 466 3 268 549 3 777 632 4 285 ...

Page 90: ...mber of heating stages active for staged gas control option only Compare to following point Run Status VIEW H MAX This variable displays the maximum number of heat stages available for this model ECONOMIZER RUN STATUS The Economizer Run Status display table provides information about the economizer and can be used to troubleshoot economizer problems See Table 106 The current position commanded pos...

Page 91: ...mode CCN LINKAGE DISPLAY TABLE The CCN Linkage display table provides information on unit linkage See Table 109 COMPRESSOR RUN HOURS DISPLAY TABLE The Compressor Run Hours Display Table displays the number of run time hours for each compressor See Table 110 COMPRESSOR STARTS DISPLAY TABLE The Com pressor Starts Display Table displays the number of starts for each compressor See Table 111 TIME GUAR...

Page 92: ... MODE TRIP HELPER UN C S Unoccup Cool Mode Start UCCLSTRT UN C E Unoccup Cool Mode End UCCL_END OC C S Occupied Cool Mode Start OCCLSTRT OC C E Occupied Cool Mode End OCCL_END TEMP Ctl Temp RAT SPT or Zone CTRLTEMP OC H E Occupied Heat Mode End OCHT_END OC H S Occupied Heat Mode Start OCHTSTRT UN H E Unoccup Heat Mode End UCHT_END UN H S Unoccup Heat Mode Start UCHTSTRT HVAC ascii string spelling ...

Page 93: ...d reads OFF while the compressor relay has been commanded ON for a period of 4 continuous seconds an alert is generated Any time this alert occurs a strike will be called out on the affected compressor If three successive strikes occur the compressor will be locked out requiring a manual reset or power reset of the circuit board The clearing of strikes during compressor operation is a combination ...

Page 94: ...Low refrigerant charge A120 Circuit A Low Saturated Suction Temperature Alarm Stop circuit Manual Low refrigerant charge low airflow dirty coil broken fan belt TXV problem P120 Circuit A Low Saturated Suction Temp Comp A2 Shutdown Compressor A2 shutdown Automatic Low refrigerant charge low airflow dirty coil broken fan belt TXV problem T120 Circuit A Low Saturated Suction Temperature Alert Stop ci...

Page 95: ...atic Pressure Above Limit Continue to run unit Automatic Exhaust issues check setpoint T314 IAQ Above Limit Continue to run unit Automatic Damper or IAQ control issues A404 Fire Shut Down Emergency Mode fire smoke Unit Shutdown Automatic Smoke detector switch or external switch A405 Evacuation Emergency Mode Run power exhaust Automatic Special fire mode control A406 Pressurization Emergency Mode R...

Page 96: ...ensor Temper atures AIR T OAT is outside the range 40 to 240 F 40 to 116 C Failure of this thermistor Tempera tures AIR T OAT will disable any elements of the control which requires its use Economizer control beyond the vent position and the calculation of mixed air temperature for the sumZ algorithm will not be possible This alert resets automati cally The cause of the alert is usually a faulty t...

Page 97: ... for 1 minute or less than 20 F for 20 seconds continuously the second compressor of the affected circuit if it exists will be shut down with a local alert P120 P121 and a 10 minute timeguard will be added to the compressor If saturated suction temperature continues to be less than 20 F for 4 minutes less than 10 F for 2 minutes less than 0 F for 1 minute or less than 20 F for 20 seconds continuou...

Page 98: ...4 20 mA Demand Limit Failure This alert indi cates a problem with the optional remote 4 to 20 mA demand limit signal Inputs 4 20 DLM M that is connected to the CEM module if the signal reads less than 2 mA If this occurs then demand limiting will be disabled The unit must be configured for 4 to 20 mA Demand Limiting using the Demand Limit Select Configuration DMD L DM L S T178 4 20 mA Static Press...

Page 99: ...nfiguration ALLM BP H If the measured pressure Pressures AIR P BP is above the limit for 5 minutes then the alert will occur T314 IAQ Above Limit If the unit is configured to use an CO2 sensor and the level Inputs AIR Q IAQ is above the configurable IAQ High Alert Limit Configuration ALLM IAQ H for 5 minutes then the alert will occur The unit will continue to run and the alert will automatically r...

Page 100: ...out W1 On This alert occurs in Thermostat Mode when W2 is energized and W1 is not Verify thermostat and thermostat wiring When W2 turns on the software will behave as if W1 and W2 are both on When W2 turns off the software will behave as if W1 and W2 are both off This alert resets automatically when W1 is turned on T423 Thermostat Y and W Inputs On This alert occurs in Thermostat Mode when Y1 or Y...

Page 101: ...d of the unit behind the filter access door The board also contains a second LEN port than can be used with the accessory Navigator display VAV BOARD ECB2 The VAV board which is the same hardware as the ECB1 is used to control the supply fan on VAV units See Fig 27 It sends a 4 to 20 mA signal to the VFD based on a supply duct pressure sensor connected to the board The board also accepts a signal ...

Page 102: ...02 RED JUMPER WIRE MUST BE ADDED BETWEEN R AND W1 FOR UNITS EQUIPPED WITH HEAT IN NON THERMOSTAT APPLICATIONS TO NEXT PAGE Fig 15 Typical Main Control Box Wiring Schematic 48 50AJ AK AW AY Units a48 8355 ...

Page 103: ...103 Fig 15 Typical Main Control Box Wiring Schematic 48 50AJ AK AW AY Units cont a48 8355 ...

Page 104: ...104 Fig 16 Typical Main Control Box Wiring Schematic 48 50A2 A3 A4 A5 Units a48 8355 ...

Page 105: ...105 TO NEXT PAGE Fig 17 Typical Auxiliary Control Box Wiring Schematic A48 7294 ...

Page 106: ...106 Fig 17 Typical Auxiliary Control Box Wiring Schematic cont a48 8356 ...

Page 107: ...107 Fig 18 Typical 2 Stage Gas Heat Wiring Schematic Size 051 and 060 Units Shown a48 8357 ...

Page 108: ...108 TO NEXT PAGE Fig 19 Typical Staged Gas Heat Wiring Schematic Size 051 and 060 Units Shown A48 7296 ...

Page 109: ...109 Fig 19 Typical Staged Gas Heat Wiring Schematic Size 051 and 060 Units Shown cont A48 8358 ...

Page 110: ...110 Fig 20 Typical Electric Heat Control Schematic 50 Series Size 051 and 060 Units Shown a50 8228 ...

Page 111: ...111 TO NEXT PAGE Fig 21 Typical Power Schematic 48 50AJ AK AW AY051 and 060 Units Shown A48 7298 ...

Page 112: ...112 FROM PREVIOUS PAGE Fig 21 Typical Power Schematic 48 50AJ AK AW AY051 and 060 Units Shown cont a48 8360 ...

Page 113: ...113 Fig 22 Typical Power Schematic 48 50A2 A3 A4 A5060 Unit Shown ...

Page 114: ...114 SW1 SW2 OR DEHUMIDIFY SWITCH Fig 23 Typical Controls Option Wiring Schematic a48 8361 ...

Page 115: ...115 Fig 24 Typical Small Chassis Component Location Size 020 035 Units a48 8362 ...

Page 116: ...116 Fig 25 Typical Large Chassis Component Locations Size 036 060 Units A48 7302 ...

Page 117: ...ay HPS High Pressure Switch HR Heat Relay HS Hall Effect Induced Draft Motor Switch IAQ Indoor Air Quality IDF Induced Draft Fan IDM Induced Draft Motor IFC Indoor Fan Contactor IFCB Indoor Fan Circuit Breaker IFM Indoor Fan Motor IGC Integrated Gas Control Board IP Internal Compressor Protector LAT Staged Gas Temperature Sensor LEN Local Equipment Network LS Limit Switch MBB Main Base Board MGV M...

Page 118: ...or 18 20 0 5vdc thermistor ohms RAT Return air temperature AN5 J8 9 10 9 thermistor ohms SA_TEMP Supply air temperature AN6 J8 11 12 11 thermistor ohms OAT Outdoor air temperature AN7 J8 13 14 13 thermistor ohms SPT Space temperature T55 56 AN8 J8 1 2 1 thermistor ohms SPTO Space temperature offset T56 AN9 J8 3 4 3 thermistor ohms IAQ IAQMINOV IAQ analog input AN10 J8 5 6 5 thermistor ohms FLTS Fi...

Page 119: ...24VDC 5 0 20mA in 6 GND 0 20mA OUTPUTS ECB1_AO1 ECB1 analog output 1 AO1 J9 1 2 1 0 20mA 2 GND 0 20mA OUT ECONOCMD Economizer actuator digital control PP MP J7 1 3 1 PP MP Data 2 24VAC 3 GND Belimo PP MP Protocol PE_A Power Exhaust stage A RLY1 J8 1 3 1 2 RLY1A 3 RLY1B 1 Closes RLY1A RLY1B PE_B Power Exhaust stage B RLY 2 J8 4 6 4 5 RLY2A 6 RLY2B 1 Closes RLY2A RLY2B PE_C Power Exhaust stage C RLY...

Page 120: ...ND 0 20mA OUT PP MP J7 1 3 1 PP MP Data 2 24VAC 3 GND Belimo PP MP Protocol RLY1 J8 1 3 1 2 RLY1A 3 RLY1B 1 Closes RLY1A RLY1B RLY 2 J8 4 6 4 5 RLY2A 6 RLY2B 1 Closes RLY2A RLY2B RLY 3 J8 7 9 7 8 RLY3A 9 RLY3B 1 Closes RLY3A RLY3B MLV Minimum load valve RLY 6 J8 16 18 16 17 RLY6A 18 RLY6B 1 Closes RLY6A RLY6B ADDRESS DIP SWITCHES ALL ON RED LED STATUS GREEN LED LEN LOCAL EQUIPMENT NETWORK J2 J1 PW...

Page 121: ...mistor 1 2 0 5VDC thermistor ohms AN7 J6 4 6 4 5v 5 Vin 6 GND thermistor 4 5 0 5VDC thermistor ohms AN8 J6 7 9 7 5v 8 Vin 9 GND thermistor 7 8 0 5VDC thermistor ohms AN9 J7 1 2 1 thermistor ohms AN10 J7 3 4 3 thermistor ohms OUTPUTS AO1 J8 1 2 1 0 20mA 2 GND 0 20mA OUT AO2 J8 3 4 3 0 20mA 4 GND 0 20mA OUT HS3 Heat Stage 3 RLY1 J9 1 3 1 2 RLY1A 3 RLY1B 1 Closes RLY1A RLY1B HS4 Heat Stage 4 RLY 2 J9...

Page 122: ...he scrolling marquee display The VFD is powered during normal operation to prevent condensa tion from forming on the boards during the off mode and is stopped by driving the speed to 0 by sending a 2 mA signal to the VFD The A Series units use ABB ACH550 VFDs The interface wiring for the VFDs is shown in Fig 31 Terminal designations are shown in Table 121 POINT NAME POINT DESCRIPTION I O POINT NAM...

Page 123: ...ucers that are connected to the low side of the system The 48 50A2 A3 A4 A5 units are equipped with four pres sure transducers These units have two pressure transducers connected to the low side of the system and two pressure trans ducers connected to the high side of the system By using either temperature sensors or transducers the ComfortLink controller displays the high and low side pres sures ...

Page 124: ...thods are to be used then a field installed humidity sensor must be installed for outdoor air en thalpy and customer curve control and two humidity sensors must be installed for differential enthalpy Installation holes are pre drilled and wire harnesses are installed in every unit for connection of the humidity sensors The ComfortLink controls convert the measured humidity into enthalpy dewpoint a...

Page 125: ...C 8 Smoke Detector Remote Alarm external contacts 9 Smoke Detector Remote Alarm external contacts 10 Fire Shutdown 24 VAC external 11 Fire Shutdown external contact 12 Fire Control Common external contact 13 Fire Pressurization external contact 14 Fire Evacuation external contact 15 Fire Smoke Purge external contact 16 Not Used TB 6 FIELD CONNECTIONS HY84HA101 in Main Control Box TB6 1 Remote Occu...

Page 126: ...ontractor s Manual for further information NOTE Conductors and drain wire must be 20 AWG American Wire Gage minimum stranded tinned copper Individual conductors must be insulated with PVC PVC nylon vinyl Teflon or polyethylene An aluminum polyester 100 foil shield and an outer jacket of PVC PVC nylon chrome vinyl or Teflon with a minimum operating tempera ture range of 20 C to 60 C is required It ...

Page 127: ...ons occur unplug the connector If conditions return to normal check the CCN connector and cable Run new cable if necessary A short in one section of the bus can cause problems with all system elements on the bus CCN WEB OR NETWORK OPTIONS REMOTE CCN SITE TELINK NON CARRIER HVAC EQUIPMENT BRIDGE RECOM MENDED CID ROOFTOP UNIT COMFORT ID AIR TERMINAL CID CID AIR DISTRIBUTION DIGITAL AIR VOLUME CONTRO...

Page 128: ...terior MAIN BURNERS At the beginning of each heating sea son inspect for deterioration or blockage due to corrosion or other causes Observe the main burner flames and adjust if nec essary Check spark gap See Fig 37 Refer to Main Burners section on page 139 FLUE GAS PASSAGEWAYS The flue collector box and heat exchanger cells may be inspected by removing gas section access panel flue box cover colle...

Page 129: ...Coil cleaning should be part of the unit s regularly scheduled maintenance procedures to ensure long life of the coil Failure to clean the coils may result in reduced du rability in the environment Avoid the use of coil brighteners acid cleaning prior to painting high pressure washers poor quality water for cleaning Totaline environmentally sound coil cleaner is non flamma ble hypoallergenic nonba...

Page 130: ...ev ery 6 months with suitable bearing grease Do not over grease Typical lubricants are given below Preferred lubricant because it contains rust and oxidation inhibitors CONDENSER AND EVAPORATOR FAN MOTOR BEAR INGS The condenser and evaporator fan motors have perma nently sealed bearings so no field lubrication is necessary Evaporator Fan Performance Adjustment Fig 40 Fan motor pulleys are designed...

Page 131: ... Reverse above procedure to reinstall fan 10 Check and adjust belt tension as necessary 11 Restore power to unit Belt Tension Adjustment To adjust belt tension 1 Turn off unit power supply 2 Loosen motor mounting nuts and bolts See Fig 42 3 Loosen fan motor nuts 4 Turn motor jacking bolts to move motor mounting plate left or right for proper belt tension A slight bow should be present in the belt ...

Page 132: ... added in small increments Using cooling charging charts provided Fig 44 50 add or remove refrigerant until condi tions of the chart are met As conditions get close to the point on the chart add or remove charge in 1 4 lb increments until complete Ensure that all fans are on and all compressors are running when using charging charts To Use the Cooling Charging Chart Use the outdoor air temperature...

Page 133: ...e SST 45 F SST 55 F SST 35 F 20 Ton MCHX CIRCUIT B Charging Chart All Compressors on a Circuit Must be Operating All Outdoor Fans Must be Operating 70 75 80 85 90 95 100 105 110 115 120 125 130 135 140 145 150 55 60 65 70 75 80 85 90 95 100 105 110 115 120 125 Outdoor Air Temperature deg F Saturated Discharge Temperature deg F Reduce Charge if Above Curve Add Charge if Below Curve SST 45 F SST 55 ...

Page 134: ... 115 120 125 Outdoor Air Temperature deg F Saturated Condensing Temperature deg F Reduce Charge if Above Curve Add Charge if Below Curve S S T 4 5 F S S T 5 5 F S S T 3 5 F 25 and 27 Ton MCHX CIRCUIT B Charging Chart All Compressors on a Circuit Must be Operating All Outdoor Fans Must be Operating 70 75 80 85 90 95 100 105 110 115 120 125 130 135 140 145 150 55 60 65 70 75 80 85 90 95 100 105 110 ...

Page 135: ... T 4 5 F S S T 5 5 F S S T 3 5 F 30 Ton MCHX CIRCUIT B Charging Chart All Compressors on a Circuit Must be Operating All Outdoor Fans Must be Operating 70 75 80 85 90 95 100 105 110 115 120 125 130 135 140 145 150 55 60 65 70 75 80 85 90 95 100 105 110 115 120 125 Outdoor Air Temperature deg F Saturated Condensing Temperature deg F Reduce Charge if Above Curve Add Charge if Below Curve S S T 4 5 F...

Page 136: ... 4 5 F S S T 5 5 F S S T 3 5 F 35 Ton MCHX CIRCUIT B Charging Chart All Compressors on a Circuit Must be Operating All Outdoor Fans Must be Operating 85 90 95 100 105 110 115 120 125 130 135 140 145 150 155 55 60 65 70 75 80 85 90 95 100 105 110 115 120 Outdoor Air Temperature deg F Saturated Condensing Temperature deg F Reduce Charge if Above Curve Add Charge if Below Curve S S T 4 5 F S S T 5 5 ...

Page 137: ...ssors on a Circuit Must be Operating All Outdoor Fans Must be Operating 70 75 80 85 90 95 100 105 110 115 120 125 130 135 140 145 150 55 60 65 70 75 80 85 90 95 100 105 110 115 120 125 Outdoor Air Temperature deg F Saturated Condensing Temperature deg F Reduce Charge if Above Curve Add Charge if Below Curve S S T 4 5 F S S T 3 5 F S S T 5 5 F Fig 48 Charging Chart 48 50A2 A3 A4 A5040 with R 410A R...

Page 138: ... T 4 5 F S S T 5 5 F S S T 3 5 F 60 Ton MCHX CIRCUIT B Charging Chart All Compressors on a Circuit Must be Operating All Outdoor Fans Must be Operating 70 75 80 85 90 95 100 105 110 115 120 125 130 135 140 145 150 55 60 65 70 75 80 85 90 95 100 105 110 115 120 125 Outdoor Air Temperature deg F Saturated Condensing Temperature deg F Reduce Charge if Above Curve Add Charge if Below Curve S S T 4 5 F...

Page 139: ...anifold bracket to basepan 9 Remove 4 screws that hold the burner support plate flange to the vestibule plate 10 Lift burner assembly out of unit 11 Reverse procedure to re install burners Filter Drier 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 INLET PRESSURE TAP ON S...

Page 140: ...64 91 COOL COOLING INFORMATION C CAP Current Running Capacity CAPTOTAL 46 47 49 90 92 CUR S Current Cool Stage COOL_STG 46 47 63 90 92 REQ S Requested Cool Stage CL_STAGE 46 47 90 92 MAX S Maximum Cool Stages CLMAXSTG 46 47 90 92 DEM L Active Demand Limit DEM_LIM forcible 46 48 90 92 SUMZ COOL CAP STAGE CONTROL 46 47 90 92 SUMZ SMZ Capacity Load Factor SMZ 46 47 90 92 SUMZ ADD R Next Stage EDT Dec...

Page 141: ...elay ON OFF ALRM_TST 30 FANS TEST FANS S FAN Supply Fan Relay ON OFF SFAN_TST 30 S VFD Supply Fan VFD Speed 0 100 SGVFDTST 30 CD F A Condenser Fan Circuit A ON OFF CNDA_TST 30 CD F B Condenser Fan Circuit B ON OFF CNDB_TST 30 COOL TEST COOLING A1 Compressor A1 Relay ON OFF CMPA1TST 30 A2 Compressor A2 Relay ON OFF CMPA2TST 30 MLV Min Load Valve HGBP ON OFF MLV_TST 30 B1 Compressor B1 Relay ON OFF ...

Page 142: ...PVUNC 50 ITEM EXPANSION RANGE UNITS CCN POINT WRITE STATUS GEN I GENERAL INPUTS FLT S Filter Status Input DRTY CLN FLTS forcible G FAN Fan Request From IGC ON OFF IGCFAN REMT Remote Input State RMTIN forcible E SW Economizer Control Input YES NO ECOSW forcible E ENA Remote Economizer Enable YES NO ECONENBL forcible E OVR Econo Position Override YES NO ECOORIDE forcible S FN S Supply Fan Status Swi...

Page 143: ...elay ON OFF HIR forcible ECON ECONOMIZER ECN P Economizer Act Curr Pos 0 100 ECONOPOS ECN C Economizer Act Cmd Pos 0 100 ECONOCMD forcible E PWR Economizer Power Relay ON OFF ECON_PWR forcible GEN O GENERAL OUTPUTS ALRM Remote Alarm Aux Relay ON OFF ALRM forcible ITEM EXPANSION RANGE UNITS CCN POINT DEFAULT PAGE NO UNIT UNIT CONFIGURATION C TYP Machine Control Type 1 6 multi text strings CTRLTYPE ...

Page 144: ..._PGAIN 1 51 53 54 SG CF HT D Heat Control Derv Gain 0 1 5 HT_DGAIN 1 51 53 54 SG CF HT TM Heat PID Rate Config 60 300 sec HTSGPIDR 90 51 53 54 SP SUPPLY STATIC PRESS CFG SP CF Static Pressure Config 0 1 multi text strings STATICFG No 31 57 58 60 SP FN Static Pres Fan Control Yes STATPFAN Yes 57 58 SP S Static Pressure Sensor Enable Disable SPSENS Disable 57 58 SP LO Static Press Low Range 10 0 SP_...

Page 145: ...S1 Demand Limit Sw 1 Setpt 0 100 DLSWSP1 80 31 49 D L S2 Demand Limit Sw 2 Setpt 0 100 DLSWSP2 50 31 49 IAQ INDOOR AIR QUALITY CFG DCV C DCV ECONOMIZER SETPOINTS DCV C EC MN Economizer Min Position 0 100 ECONOMIN 5 29 31 32 67 70 DCV C IAQ M IAQ Demand Vent Min Pos 0 100 IAQMINP 0 29 31 67 70 AQ CF AIR QUALITY CONFIGS AQ CF IQ A C IAQ Analog Sensor Config 0 4 multi text strings IAQANCFG 0 32 67 69...

Page 146: ...T hi alert limit unocc 40 245 dF RAHU 100 72 73 99 R RH L RARH low alert limit 0 100 RRHL 0 72 73 99 R RH H RARH high alert limit 0 100 RRHH 100 72 73 99 SP L SP low alert limit 0 5 H2O SPL 0 73 99 SP H SP high alert limit 0 5 H2O SPH 2 73 99 BP L BP lo alert limit 0 25 0 25 H2O BPL 0 25 73 99 BP H BP high alert limit 0 25 0 25 H2O BPH 0 25 73 99 IAQ H IAQ high alert limit 0 5000 IAQH 1200 73 99 T...

Page 147: ... Day 0 31 HOL_DAY1 76 77 HD 01 LEN Duration Days 0 99 HOL_LEN1 76 77 Repeated for holidays 2 30 DAY S DAYLIGHT SAVINGS TIME DS ST DAYLIGHT SAVINGS START DS ST ST MN Month 1 12 STARTM 4 76 77 DS ST ST WK Week 1 5 STARTW 1 76 77 DS ST ST DY Day 1 7 STARTD 7 76 77 DS ST MIN A Minutes to Add 0 90 MINADD 60 76 77 DS SP DAYLIGHTS SAVINGS STOP DS SP SP MN Month 1 12 STOPM 10 76 77 DS SP SP WK Week 1 5 ST...

Page 148: ...r A2 Feedback CSB_A2 Compressor A2 Timeguard CMPA2_TG Minimum Load Valve MLV Cir A Discharge Pressure PSIG DP_A Cir A Suction Pressure PSIG SP_A Cir A Sat Condensing Tmp dF SCTA Cir A Sat Suction Temp dF SSTA COOL_B Compressor B1 Relay CMPB1 Compressor B1 Feedback CSB_B1 Compressor B1 Timeguard CMPB1_TG Compressor B2 Relay CMPB2 Compressor B2 Feedback CSB_B2 Compressor B2 Timeguard CMPB2_TG Cir B ...

Page 149: ...rlock Relay HIR forcible Heat Stage 1 Timeguard HS1_TG Heat Stage 2 Timeguard HS2_TG Heat Stage 3 Timeguard HS3_TG Heat Stage 4 Timeguard HS4_TG Heat Stage 5 Timeguard HS5_TG Heat Stage 6 Timeguard HS6_TG MODEDISP System Mode ascii text strings HVAC Mode ascii text strings Control Mode ascii text strings Currently Occupied On Off MODEOCCP Timed Override in effect On Off MODETOVR DCV resetting min ...

Page 150: ...e Economizer Enable Yes No ECONENBL forcible Econo Position Override Yes No ECOORIDE forcible Remote Input State On Off RMTIN forcible Supply Fan Status Switch On Off SFS forcible Demand Limit Switch 1 On Off DMD_SW1 forcible Demand Limit Switch 2 On Off DMD_SW2 forcible Pressurization Input Alarm Normal PRES forcible Evacuation Input Alarm Normal EVAC forcible Smoke Purge Input Alarm Normal PURG ...

Page 151: ...OAQ Broadcast Off On OAQBC Off Global Schedule Broadcst Off On GSBC Off Daylight Savings Start Month 1 12 STARTM 4 Week 1 5 STARTW 1 Day 1 7 STARTD 7 Minutes to Add 0 90 MINADD 60 Daylight Savings Stop Month 1 12 STOPM 10 Week 1 5 STOPW 5 Day 1 7 STOPD 7 Minutes to Subtract 0 90 MINSUB 60 Ctlr ID Device Name A Series Description A Series Rooftop Location Software Part Number CESR131343 XX XX Model...

Page 152: ...cc 40 245 dF SALO 40 EDT hi alert limit occ 40 245 dF SAHO 100 EDT lo alert limit unocc 40 245 dF SALU 40 EDT hi alert limit unocc 40 245 dF SAHU 100 RAT lo alert limit occ 40 245 dF RALO 60 RAT hi alert limit occ 40 245 dF RAHO 90 RAT lo alert limit unocc 40 245 dF RALU 40 RAT hi alert limit unocc 40 245 dF RAHU 100 RARH low alert limit 0 100 RRHL 0 RARH high alert limit 0 100 RRHH 100 SP low ale...

Page 153: ... Heat On 1 2 F DMDLHON 1 5 Dmd Level Hi Heat On 0 5 20 0 F DMDHHON 0 5 Dmd Level Lo Heat Off 0 5 2 F DMDLHOFF 1 Dmd Level Lo Cool On 1 2 F DMDLCON 1 5 Dmd Level Hi Cool On 0 5 20 0 F DMDHCON 0 5 Dmd Level Lo Cool Off 0 5 2 F DMDLCOFF 1 Cool Trend Demand Level 0 1 5 F CTRENDLV 0 1 Heat Trend Demand Level 0 1 5 F HTRENDLV 0 1 Cool Trend Time 30 600 sec CTRENDTM 120 Heat Trend Time 30 600 sec HTRENDT...

Page 154: ...nce 0 5000 IAQREFL 0 IAQ High Reference 0 5000 IAQREFH 2000 OAQ Low Reference 0 5000 OAQREFL 0 OAQ High Reference 0 5000 OAQREFH 2000 IAQ Purge Yes No IAQPURGE No IAQ Purge Duration 5 60 min IAQPTIME 15 IAQ Purge LoTemp Min Pos 0 100 IAQPLTMP 10 IAQ Purge HiTemp Min Pos 0 100 IAQPHTMP 35 IAQ Purge OAT Lockout 35 70 dF IAQPNTLO 50 SP__ Static Pres VFD Control No STATICFG No Static Pres Fan Control ...

Page 155: ...0 RTPF 1 MCHX 0 1 COILTYPE MAT Calc Config 0 2 MAT_SEL 1 Reset MAT Table Entries Yes No MATRESET No MAT Outside Air Default 0 100 MATOAPOS 20 Altitude in feet 0 60000 ALTITUDE 0 Startup Delay Time 0 900 sec DELAY 0 TSTAT Both Heat and Cool Yes No TSTATALL No Auxiliary Relay Config 0 3 AUXRELAY 0 Space Temp Sensor Enable Disable SPTSENS Disable Space Temp Offset Sensor Enable Disable SPTOSENS Disab...

Page 156: ...n Off CMPB1 Compressor B1 Feedback On Off CSB_B1 Curr Sens Brd B1 Status ascii CSBB1ASC CSB B1 Feedback Alarm Enable Disable CSB_B1EN config Comp B1 Locked Out Yes No CMPB1LOK Compressor B1 Strikes CMPB1STR Enable Compressor B1 Enable Disable CMPB1ENA config Compressor B2 Relay On Off CMPB2 Compressor B2 Feedback On Off CSB_B2 Curr Sens Brd B2 Status ascii CSBB2ASC CSB B2 Feedback Alarm Enable Dis...

Page 157: ...Conditions which prevent economizer being active Econ Act Unavailable Yes No ECONUNAV Remote Econ Disabled Yes No ECONDISA DBC OAT lockout Yes No DBC_STAT DEW OA Dewpt lockout Yes No DEW_STAT DDBC OAT RAT lockout Yes No DDBCSTAT OAEC OA Enth Lockout Yes No OAECSTAT DEC Diff Enth Lockout Yes No DEC_STAT EDT Sensor Bad Yes No EDT_STAT OAT Sensor Bad Yes No OAT_STAT Economizer forced Yes No ECONFORC ...

Page 158: ...ime LNEXTOCC Next Unoccupied Day LNEXTUOD Next Unoccupied Time LNEXTUNC Last Unoccupied Day LLASTUOD Last Unoccupied Time LLASTUNC MILLIAMP IAQ milliamps ma IAQ_MA OAQ milliamps ma OAQ_MA SP Reset milliamps ma SPRST_MA 4 20 ma Demand Signal ma DMDLMTMA forcible EDT Reset milliamps ma EDTRESMA OARH milliamps ma OARH_MA RARH milliamps ma RARH_MA BP milliamps ma BP_MA SP milliamps ma SP_MA MODES Syst...

Page 159: ...config Compressor B1 Run Hours hours HR_B1 config Compressor B2 Run Hours hours HR_B2 config Compressor A1 Starts CY_A1 config Compressor A2 Starts CY_A2 config Compressor B1 Starts CY_B1 config Compressor B2 Starts CY_B2 config SUMZ Cooling Control Point dF COOLCPNT Mixed Air Temperature dF MAT Evaporator Discharge Tmp dF EDT Return Air Temperature dF RAT Outside Air Temperature dF OAT Econo Damp...

Page 160: ...S4_TST test Relay 5 W1 Gas Valve 3 ON OFF HS5_TST test Relay 6 W2 Gas Valve 3 ON OFF HS6_TST test TESTINDP Economizer Position Test ECONCTST test Economizer Power Test ECONPTST test Calibrate the Economizer ECON_CAL test Power Exhaust Relay A PE_A_TST test Power Exhaust Relay B PE_B_TST test Power Exhaust Relay C PE_C_TST test Heat Interlock Relay ON OFF HIR_TST test Remote Alarm Aux Relay ON OFF ...

Page 161: ...uring the off mode and is stopped by driving the speed to 0 by sending a 4 mA signal to the VFD The A Series units use ABB VFDs The interface wiring for the VFDs is shown in Fig A The VFD connects through an isolation board to the 4 to 20 mA RCB board Terminal designations are shown in Table A Configurations are shown in Table B Table A VFD Terminal Designations TERMINAL FUNCTION U1 V1 W1 Three Ph...

Page 162: ...ters are set a The Carrier Assistant will ask Is this an Air Handler or Rooftop Select Rooftop b The Carrier Assistant will ask Is this a High E or Premium E motor Select the correct efficiency type c If the VFD can be used with two different size HP motors then the Carrier Assistant will ask the user to choose the proper HP Select the correct motor horsepower START UP BY CHANGING PARAMETERS INDIV...

Page 163: ...e lower middle displays the current time if configured to show the time The first time the drive is powered up it is in the OFF mode To switch to local hand held control and control the drive using the control panel press and hold the HAND button Pressing the HAND button switches the drive to hand control while keeping the drive running Press the AUTO button to switch to remote input control To st...

Page 164: ...BACKUP on the display screen and press ENTER SOFT KEY 2 4 Use the UP or DOWN keys to highlight DOWNLOAD TO DRIVE ALL and press SEL SOFT KEY 2 5 The text Restoring Parameters will be displayed with a progress indicator To stop the process select ABORT SOFT KEY 1 6 When the download is complete the text Parameter download successful will be displayed 7 The display will then return to the PAR BACKUP ...

Page 165: ...nel is not touched and the fault is still active ALARMS GREEN LED FLASHING For less severe errors called alarms the diagnostic display is advisory For these situations the drive is simply reporting that it had detect ed something unusual In these situations the drive flashes the green LED on the drive does not apply to alarms that arise from control panel operation errors sets an appropriate bit i...

Page 166: ...2002 MAXIMUM SPEED parameters Check parameter settings for 2001 and 2002 Check adequacy of motor braking torque Check applicability of torque control Check brake chopper and resistor 25 RESERVED Not used 26 DRIVE ID Internal fault Configuration block drive ID is not valid 27 CONFIG FILE Internal configuration file has an error Contact Carrier 28 SERIAL 1 ERR Field bus communication has timed out C...

Page 167: ...ture feedback This alarm warns that a Motor Overload fault trip may be near Check for overloaded motor Adjust the parameters used for the estimate 3005 through 3009 Check the temperature sensors and Group 35 parameters 2011 UNDERLOAD Motor load is lower than expected This alarm warns that a Motor Underload fault trip may be near Check that the motor and drive ratings match motor is NOT undersized ...

Page 168: ...ulate air inside the enclosure To replace the internal enclosure fan for frame sizes R1 to R4 perform the following see Fig F 1 Remove power from drive 2 Remove the front cover 3 The housing that holds the fan in place has barbed retain ing clips at each corner Press all four clips toward the center to release the barbs 4 When the clips barbs are free pull the housing up to re move from the drive ...

Page 169: ...169 APPENDIX C VFD INFORMATION cont Fig F Internal Enclosure Fan Replacement A48 7716 ...

Page 170: ...ing cooling HVAC modes HVAC mode Off The unit is off and no operating modes are active HVAC mode Tempering Vent The economizer is at minimum vent position but the supply air temperature has dropped below the tempering vent set point Gas heat is used to temper the ventilation air HVAC mode Tempering LoCool The economizer is at minimum vent position but the combination of the outside air temperature...

Page 171: ...and the arrow on the Ones 1 s switch to 5 BACNET DEVICE INSTANCE ADDRESS The UPC Open controller also has a BACnet Device Instance address This Device Instance MUST be unique for the complete BAC net system in which the UPC Open controller is installed The Device Instance is auto generated by default and is derived by adding the MAC address to the end of the Network Number The Network Number of a ...

Page 172: ...ler communicates using BACnet on an MS TP network segment communications at 9600 bps 19 2 kbps 38 4 kbps or 76 8 kbps Wire the controllers on an MS TP network segment in a dai sy chain configuration Wire specifications for the cable are 22 AWG American Wire Gage or 24 AWG low capacitance twisted stranded shielded copper wire The maximum length is 2000 ft Install a BT485 terminator on the first and...

Page 173: ...minator Installation a48 8582 SPECIFICATION RECOMMMENDATION Cable Single twisted pair low capacitance CL2P 22 AWG 7x30 TC foam FEP plenum rated cable Conductor 22 or 24 AWG stranded copper tin plated Insulation Foamed FEP 0 015 in 0 381 mm wall 0 060 in 1 524 mm O D Color code Black White Twist Lay 2 in 50 8 mm lay on pair 6 twists foot 20 twists meter nominal Shielding Aluminum Mylar shield with ...

Page 174: ...ation and User Guide for instruc tions on connecting and using the BACview6 device To order a BACview6 Handheld BV6H consult Commer cial Products i Vu Open Control System Master Prices WIRING SPECIFICATIONS RECOMMENDED VENDORS AND PART NUMBERS Wire Type Description Connect Air International Belden RMCORP Contractors Wire and Cable MS TP Network RS 485 22 AWG single twisted shielded pair low capaci...

Page 175: ...ove the battery from the controller making note of the battery s polarity Insert the new battery matching the battery s polarity with the polarity indicated on the UPC Open controller Table E LED Status Indicators Table F Run and Error LEDs Controller and Network Status Indication IMPORTANT Power must be ON to the UPC Open when replacing the battery or the date time and trend data will be lost LED...

Page 176: ...ressor A2 Timeguard R n a n a n a cmpa2_tg_1 CMPA2_TG AV 32 Compressor B1 Run Hours R hr n a n a hr_b1_1 HR_B1 AV 33 Compressor B1 Starts R n a n a n a cy_b1_1 CY_B1 AV 34 Compressor B1 Strikes R n a n a n a cmpb1str_1 CMPB1STR AV 35 Compressor B1 Timeguard R n a n a n a cmpb1_tg_1 CMPB1_TG AV 36 Compressor B2 Run Hours R hr n a n a hr_b2_1 HR_B2 AV 37 Compressor B2 Starts R n a n a n a cy_b2_1 CY...

Page 177: ...OVPOS AV 95 IAQ High Reference W n a 2000 0 5000 iaqrefh_1 IAQREFH AV 96 IAQ Low Reference W n a 0 0 5000 iaqrefl_1 IAQREFL AV 97 IAQ Min Pos Override W n a 0 100 iaqminov_1 IAQMINOV AV 98 IAQ Purge Duration W min 15 5 60 iaqptime_1 IAQPTIME AV 99 IAQ Purge HiTemp Min Pos W 35 0 100 iaqphtmp_1 IAQPHTMP AV 100 IAQ Purge LoTemp Min Pos W 10 0 100 iaqpltmp_1 IAQPLTMP AV 101 IAQ Purge OAT Lockout W F ...

Page 178: ... AV 161 Tempering in Cool SASP W n a 5 5 75 tempcool_1 TEMPCOOL AV 162 Tempering Purge SASP W n a 50 20 80 temppurg_1 TEMPPURG AV 163 Tempering Vent Occ SASP W n a 65 20 80 tempvocc_1 TEMPVOCC AV 164 Temper Vent Unocc W n a 50 20 80 tempvunc_1 TEMPVUNC AV 165 Supply Fan VFD Speed W n a 0 100 sf_vfd_output_1 SFVFDTST AV 166 Un Ec Free Cool OAT Lock W F 50 40 70 uefcntlo_1 UEFCNTLO AV 168 Unoccupied...

Page 179: ...harge Pressure R psig n a n a discharge_press_b_1 DP_B AV 1606 Cir B Sat Condensing Temperature R F n a n a sat_cond_temp_b_1 SCTB AV 1607 Cir B Sat Suction Temperature R F n a n a sat_suction_temp_b_1 SSTB AV 2003 Requested Heat Stage R n a n a n a heat_run_1 HT_STAGE AV 2007 Controlling Space Temp W F n a 40 240 space_temp_1 SPACE_T AV 2050 Supply Fan VFD Speed R n a n a sfvfdtst_1 SFAN_VFD AV 2...

Page 180: ...n R n a n a n a dhdisabl_1 DHDISABL BV 30 Dehumidify Input W n a n a 0 1 dhdiscin_1 DHDISCIN BV 31 Demand Limit In Effect R n a n a n a modedmlt_1 MODEDMLT BV 32 DEW OA Dewpt Lockout R n a n a n a dew_stat_1 DEW_STAT BV 34 Econ Act Unavailable R n a n a n a econunav_1 ECONUNAV BV 35 Econ disable in DH mode W n a 1 0 1 dhecdisa_1 DHECDISA BV 36 Economizer Active R n a n a n a ecactive_1 ECACTIVE BV...

Page 181: ... hs6_1 HS6 BV 80 Remote Econ Disabled R n a n a n a econdisa_1 ECONDISA BV 81 Remote Input State W n a n a 0 1 rmtin_1 RMTIN BV 86 Slow Change Cap Override R n a n a n a slo_chng_1 SLO_CHNG BV 87 Soft Stop Request W n a n a 0 1 softstop_1 SOFTSTOP BV 93 Supply Air Reset R n a n a n a modesars_1 MODESARS BV 94 Supply Fan Relay R n a n a n a sfan_rly_1 SFAN_RLY BV 95 Supply Fan Status Switch W n a n...

Page 182: ...lay_1 ALRM BV 2911 User Defined Binary 1 n a n a n a n a user_binary_1_1 n a BV 2912 User Defined Binary 2 n a n a n a n a user_binary_2_1 n a BV 2913 User Defined Binary 3 n a n a n a n a user_binary_3_1 n a BV 2914 User Defined Binary 4 n a n a n a n a user_binary_4_1 n a BV 2915 User Defined Binary 5 n a n a n a n a user_binary_5_1 n a BV 2999 Element Comm Status n a n a n a n a element_stat_1 ...

Page 183: ...Hot gas bypass 75 HVAC modes 33 Independent outputs 30 Indoor air quality control 67 Indoor air quality options 29 Internal wiring 7 Local display tables 140 147 Lubrication 130 Main burners 139 Major system components 101 127 Mode selection 170 Mode trip helper 91 Modes 32 Multi stage constant volume units with mechanical thermostat 28 Multi stage constant volume units with space sensor 28 Power ...

Page 184: ...o discontinue or change at any time specifications or designs without notice and without incurring obligations Catalog No 04 53480077 01 Printed in U S A Form 48 50A 9T Pg 184 6 10 Replaces 48 50A 7T Copyright 2010 Carrier Corporation ...

Page 185: ... Entries Yes No No MAT D MAT Outside Air Default 0 100 20 ALTI Altitude in feet 0 60000 0 DLAY Startup Delay Time 0 900 sec 0 STAT TSTAT_Both Heat and Cool Yes No No AUX R Auxiliary Relay Config 0 3 0 SENS INPUT SENSOR CONFIG SENS SPT S Space Temp Sensor Enable Disable Disable SENS SP O S Space Temp Offset Sensor Enable Disable Disable SENS SP O R Space Temp Offset Range 1 10 5 SENS RRH S Return A...

Page 186: ...100 SP FS VFD Fire Speed Override 0 100 100 SP RS Stat Pres Reset Config 0 4 multi text strings 0 SP RT SP Reset Ratio dF 0 2 00 in wg dF 0 2 SP LM SP Reset Limit in iwc 0 2 00 in wg 0 75 SP EC SP Reset Econo Position 0 100 5 S PID STAT PRESS PID CONFIGS S PID SP TM Stat Pres PID Run Rate 1 200 sec 2 S PID SP P Static Press Prop Gain 0 100 20 S PID SP I Static Pressure Intg Gain 0 50 2 S PID SP D ...

Page 187: ... LV Cool Trend Demand Level 0 1 5 F 0 1 H T LV Heat Trend Demand Level 0 1 5 F 0 1 C T TM Cool Trend Time 30 600 sec 120 H T TM Heat Trend Time 30 600 sec 120 DMD L DEMAND LIMIT CONFIG DM L S Demand Limit Select 0 3 multi text strings 0 D L 20 Demand Limit at 20 ma 0 100 100 SH NM Loadshed Group Number 0 99 0 SH DL Loadshed Demand Delta 0 60 0 SH TM Maximum Loadshed Time 0 120 min 60 D L S1 Demand...

Page 188: ...LES OVERRIDES SC OV SCH N Schedule Number 0 99 1 SC OV HOL T Accept Global Holidays YES NO No SC OV O T L Override Time Limit 0 4 HRS 1 SC OV OV EX Timed Override Hours 0 4 HRS 0 SC OV SPT O SPT Override Enabled YES NO Yes SC OV T58 O T58 Override Enabled YES NO Yes SC OV GL OV Global Sched Override YES NO No ALLM ALERT LIMIT CONFIG SP L O SPT lo alert limit occ 10 245 dF 60 SP H O SPT hi alert li...

Page 189: ... Sw 1 Off Open Close Open DL2 L Dmd Lmt Dehumid Off Open Close Open IAQ L IAQ Disc Input Low Open Close Open FSD L Fire Shutdown Off Open Close Open PRS L Pressurization Sw Off Open Close Open EVC L Evacuation Sw Off Open Close Open PRG L Smoke Purge Sw Off Open Close Open DISP DISPLAY CONFIGURATION TEST Test Display LEDs ON OFF Off METR Metric Display ON OFF Off LANG Language Selection 0 1 multi ...

Page 190: ...NSATE DRAINAGE CHECK FAN WHEELS AND PROPELLERS FOR LOCATION IN HOUSING ORIFICE AND SETSCREW IS TIGHT VERIFY THAT FAN SHEAVES ARE ALIGNED AND BELTS ARE PROPERLY TENSIONED VERIFY THAT SUCTION DISCHARGE AND LIQUID SERVICE VALVES ON EACH CIRCUIT ARE OPEN VERIFY THAT CRANKCASE HEATERS HAVE BEEN ON 24 HOURS BEFORE START UP START UP ELECTRICAL SUPPLY VOLTAGE L1 L2 __________ L2 L3 __________ L3 L1 ______...

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Summary of Contents for WEATHERMAKER 48/50AJ

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Carrier WEATHERMAKER 48/50AJ, Operation And Service Manual, Page: 79 / 190

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Summary of Contents for WEATHERMAKER 48/50AJ

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