Carrier WEATHERMAKER 48AJ020 Operating And Service Manual Download

Page: 1 / 160

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.

Catalog No. 04-53480037-01

Printed in U.S.A.

Form 48/50A-4T

Pg 1

8-06

Replaces: 48/50A-3T

Book 1

Tab

1a 1b

Controls, Start-Up, Operation,

Service and Troubleshooting

CONTENTS

Page

SAFETY CONSIDERATIONS

. . . . . . . . . . . . . . . . . . . . . . . . .2

GENERAL

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2,3

BASIC CONTROL USAGE

. . . . . . . . . . . . . . . . . . . . . . . . . . 3-6

Comfort

Link Control

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

Scrolling Marquee

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

Accessory Navigator™ Display

. . . . . . . . . . . . . . . . . . . . . .4

Operation

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

System Pilot™ Interface

. . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

CCN Tables and Display

. . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

• GENERICS STATUS DISPLAY TABLE

Conventions Used in this Manual

. . . . . . . . . . . . . . . . . . . .5

START-UP

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-26

Unit Preparation

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

Unit Setup

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

Internal Wiring

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

Accessory Installation

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

Crankcase Heaters

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

Evaporator Fan

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

Controls

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

Gas Heat

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

CONTROLS QUICK START

. . . . . . . . . . . . . . . . . . . . . . 27-29

Two-Stage Constant Volume Units with

Mechanical Thermostat

. . . . . . . . . . . . . . . . . . . . . . . . . .27

Two-Stage Constant Volume Units with

Space Sensor

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27

Variable Air Volume Units Using Return Air Sensor

or Space Temperature Sensor

. . . . . . . . . . . . . . . . . . . .27

Multi-Stage Constant Volume Units with

Mechanical Thermostat

. . . . . . . . . . . . . . . . . . . . . . . . . .28

Multi-Stage Constant Volume Units with

Space Sensor

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28

Economizer Options

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28

Indoor Air Quality Options

. . . . . . . . . . . . . . . . . . . . . . . . . .28

Exhaust Options

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28

Set Clock on VFD (If Installed)

. . . . . . . . . . . . . . . . . . . . . .28

Programming Operating Schedules

. . . . . . . . . . . . . . . .29

SERVICE TEST

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29,30

General

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29

Service Test Mode Logic

. . . . . . . . . . . . . . . . . . . . . . . . . . .29

Independent Outputs

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30

Fans

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30

Cooling

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30

Heating

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30

THIRD PARTY CONTROL

. . . . . . . . . . . . . . . . . . . . . . . . 30-32

Thermostat

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30

Alarm Output

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30

Remote Switch

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30

VFD Control

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31

Supply Air Reset

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31

Demand Limit Control

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31

Demand Controlled Ventilation Control

. . . . . . . . . . . . .31

CONTROLS OPERATION

. . . . . . . . . . . . . . . . . . . . . . . . 32-72

Modes

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32

• SYSTEM MODES

• HVAC MODES

Page

Unit Configuration Submenu

. . . . . . . . . . . . . . . . . . . . . . . 35

Cooling Control

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

• SETTING UP THE SYSTEM

• MACHINE DEPENDENT CONFIGURATIONS

• SET POINTS

• SUPPLY AIR RESET CONFIGURATION

• COOLING CONFIGURATION

• COMPRESSOR SAFETIES

• COMPRESSOR TIME GUARDS

• COOL MODE SELECTION PROCESS

• COOLING MODE DIAGNOSTIC HELP

• SUMZ COOLING ALGORITHM

• DEMAND LIMIT CONTROL

• HEAD PRESSURE CONTROL

• ECONOMIZER INTEGRATION WITH

MECHANICAL COOLING

Heating Control

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

• SETTING UP THE SYSTEM

• HEAT MODE SELECTION PROCESS

• TEMPERATURE DRIVEN HEAT MODE

EVALUATION

• HEAT MODE DIAGNOSTIC HELP

• INTEGRATED GAS CONTROL BOARD LOGIC

• RELOCATE SAT SENSOR FOR HEATING —

LINKAGE SYSTEMS

• MORNING WARM UP

• TEMPERING MODE

Static Pressure Control

. . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

• OPERATION

• SETTING UP THE SYSTEM

• STATIC PRESSURE RESET

• RELATED POINTS

Fan Status Monitoring

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

• GENERAL

• SETTING UP THE SYSTEM

• SUPPLY FAN STATUS MONITORING LOGIC

Dirty Filter Switch

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

Economizer

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

• SETTING UP THE SYSTEM

• ECONOMIZER OPERATION

• UNOCCUPIED ECONOMIZER FREE COOLING

• ECONOMIZER OPERATION CONFIGURATION

• ECONOMIZER DIAGNOSTIC HELP

Building Pressure Control

. . . . . . . . . . . . . . . . . . . . . . . . . . 61

• BUILDING PRESSURE CONFIGURATION

• CONSTANT VOLUME 2-STAGE CONTROL

OPERATION

• MULTIPLE POWER EXHAUST STAGE BUILDING

PRESSURE CONTROL OPERATION

Smoke Control Modes

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

• FIRE-SMOKE INPUTS

• AIRFLOW CONTROL DURING

FIRE-SMOKE MODES

48/50AJ,AK,AW,AY020-060

Single Package Large Rooftop Units

with Scroll Compressors

and

COMFORT

LINK™ Version 4.X Controls

Summary of Contents for WEATHERMAKER 48AJ020

Page 1: ... Alarm Output 30 Remote Switch 30 VFD Control 31 Supply Air Reset 31 Demand Limit Control 31 Demand Controlled Ventilation Control 31 CONTROLS OPERATION 32 72 Modes 32 SYSTEM MODES HVAC MODES Page Unit Configuration Submenu 35 Cooling Control 36 SETTING UP THE SYSTEM MACHINE DEPENDENT CONFIGURATIONS SET POINTS SUPPLY AIR RESET CONFIGURATION COOLING CONFIGURATION COMPRESSOR SAFETIES COMPRESSOR TIME...

Page 2: ... 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 quenching cloth for unbrazing operations Have fire extinguishers a...

Page 3: ...edules Occupancy or start stop sequences based on third party signals Alarm status and history and run time data Management of a complete unit service test sequence System diagnostics are enhanced by the use of multiple external sensors for air temperatures air pressures refrigerant temperatures and refrigerant pressures Unit mounted actua tors provide digital feedback data to the unit control The...

Page 4: ...ed text description across the display indi cating the full meaning of each display point Pressing the and keys when the display is blank MODE LED level will return the display to its default menu of rotating AUTO VIEW display items In addition the pass word will need to be entered again before changes can be made Changing item values or testing outputs is accomplished in the same manner Locate an...

Page 5: ...Quality Configuration sub mode and the Air Quality Set Points sub sub mode would be written as Configuration IAQ IAQ SP IQ O P This path name will show the user how to navigate through the local display to reach the desired configuration The user would scroll through the modes and submodes using the and keys The arrow symbol in the path name repre sents pressing to move into the next level of the ...

Page 6: ...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 Heating HEAT E...

Page 7: ...nt 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 sure to configu...

Page 8: ...14 51 11 000 1025 12 10 1053 12 66 1080 13 23 1106 13 80 1132 14 37 1158 14 95 1182 15 54 12 000 1063 13 85 1090 14 42 1116 15 00 1142 15 58 1166 16 17 1191 16 76 12 500 1083 14 80 1109 15 38 1135 15 96 1160 16 55 1185 17 14 13 000 1104 15 81 1129 16 39 1155 16 98 1179 17 57 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...

Page 9: ...1294 21 81 15 000 1274 22 61 1296 23 24 16 000 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 5 34 680 5 80 717 6 26 752 6 73 11 000 653 6 15 689 6...

Page 10: ... 36 1244 23 98 1265 24 61 1286 25 24 17 000 1197 24 25 1218 24 89 1240 25 52 1261 26 17 1281 26 81 18 000 1239 27 24 1260 27 89 1280 28 55 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 8 000 502 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 8...

Page 11: ...m 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 10 71 717 11 58 756 12 45 ...

Page 12: ...56 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 47 1171 33 63 1195 34 80 24 000 1146 33 ...

Page 13: ...2 1049 13 58 1076 14 14 1102 14 71 1127 15 28 1152 15 85 1177 16 42 13 000 1058 14 80 1084 15 38 1110 15 96 1135 16 54 1159 17 13 1184 17 71 13 750 1086 16 26 1111 16 85 1136 17 44 1161 18 04 1185 18 63 14 000 1095 16 77 1120 17 37 1145 17 96 1169 18 56 1193 19 16 15 000 1134 18 94 1158 19 55 1182 20 16 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 Rp...

Page 14: ...24 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 26 93 17 500 1262 27 09 1...

Page 15: ...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 26 93 18 000 1279 28 54 1299 29 18 19 000 ...

Page 16: ...1018 18 54 1042 19 52 1066 20 51 1088 21 52 1111 22 53 15 000 1035 19 81 1059 20 81 1082 21 81 1105 22 82 1127 23 85 16 000 1053 21 21 1077 22 21 1100 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 3...

Page 17: ... 11 54 1068 12 09 1094 12 66 1121 13 23 1146 13 80 1171 14 38 1196 14 97 11 000 1052 12 63 1079 13 20 1105 13 76 1131 14 34 1156 14 92 1181 15 51 12 000 1094 14 49 1120 15 07 1145 15 65 1170 16 24 1194 16 83 12 500 1115 15 51 1141 16 09 1166 16 68 1190 17 27 13 000 1138 16 58 1163 17 16 1187 17 76 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 ...

Page 18: ...0 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 7 000 475 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 1...

Page 19: ...69 23 07 1290 23 69 16 000 1200 22 73 1222 23 35 1243 23 97 1265 24 60 1286 25 23 17 000 1245 25 67 1266 26 32 1286 26 96 18 000 1290 28 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 ...

Page 20: ...g 0 2 0 4 0 6 0 8 1 0 Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp 10 000 450 3 19 509 3 86 561 4 58 608 5 34 651 6 14 12 000 516 4 81 569 5 54 617 6 30 660 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 73...

Page 21: ...7 000 1019 20 63 1045 21 70 1071 22 79 1096 23 89 1120 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 ...

Page 22: ...017 11 97 1044 12 51 1071 13 05 1097 13 59 1122 14 14 1147 14 68 1171 15 23 1195 15 78 12 000 1055 13 70 1081 14 26 1107 14 83 1132 15 39 1157 15 95 1181 16 52 13 000 1094 15 61 1120 16 20 1145 16 78 1170 17 37 1193 17 96 13 750 1125 17 17 1150 17 77 1174 18 38 1198 18 98 14 000 1135 17 71 1160 18 32 1184 18 93 15 000 1177 20 02 AIRFLOW Cfm AVAILABLE EXTERNAL STATIC PRESSURE in wg 0 2 0 4 0 6 0 8 ...

Page 23: ...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 1280 23 41 16 000 1253 24 25...

Page 24: ...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 27 07 18 000 19 000 20 0...

Page 25: ...0 18 76 12 000 1002 16 96 1026 17 92 1049 18 90 1072 19 89 1094 20 89 13 000 1020 18 13 1044 19 11 1067 20 10 1090 21 10 1112 22 12 14 000 1040 19 42 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 11...

Page 26: ...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 22 7 078 91 7 9 5 7 09 12 0 7 728 91 7 10 7 46 10 2 7 61 28 8 298 91 0 11 8 8 80 15 0 9 600 91 7 15 11 19 15 3 11 41 43 8 12 273 91 7 18 0 13 43 21 9 14 439 93 0 20 14 92 22 4 16 71 58 2 17 853 93 0 23 4 17 46 28 7 18 6...

Page 27: ...economizer option configurations 12 See Exhaust Options section on page 28 for additional exhaust option configurations Variable Air Volume Units Using Return Air Sensor or Space Temperature Sensor To con figure the unit perform the following 1 The unit is shipped with the unit control disabled Enable the control by setting Local Machine Disable Service Test STOP to No 2 The type of control is con...

Page 28: ...following configuration parame ters should be set to establish the minimum and maximum points for outdoor air damper position during demand control ventilation DCV EC MN Economizer Min Position IAQ M IAQ Demand Vent Min Pos Configuration IAQ DCV C IAQ M is used to set the absolute minimum vent position or maximum reset under DCV Configuration IAQ DCV C EC MN is used to set the minimum damper posit...

Page 29: ...SCAPE 4 Configure the unoccupied time for period 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 ...

Page 30: ...nd second stage cooling W1 first stage heating W1 and W2 first and second stage heating G supply fan Alarm Output The alarm output TB4 7 and 8 will pro vide relay closure whenever the unit is under an alert or alarm condition Remote Switch The remote switch may be configured for three different functions Under Configuration UNIT set RM CF to one of the following 0 no remote switch 1 occupied unocc...

Page 31: ...ATION The IAQ dis crete input configuration requires a CEM module optional to be installed and an interface to a switch input at TB5 6 and 7 The state of the input on the display can be found at Inputs AIR Q IAQ I Before configuring the switch functionality first determine how the switch will be read A closed switch can indicate either a low IAQ condition or a high IAQ condition This is set at Con...

Page 32: ...he HVAC mode and the Control mode The System mode is the top level mode that defines three essential states for the control system OFF RUN and TEST The HVAC mode is the functional level underneath the System mode which further defines the operation of the control The Control mode is essentially the control type of the unit Configuration UNIT C TYP This defines from where the control looks to estab...

Page 33: ...on that a compressor is run ning even though it has been commanded off HVAC Mode TEST 9 The unit is in the self test mode which is entered through the Service Test menu HVAC Mode VENT 13 This is a normal operation mode where no heating or cooling is required and outside air is being delivered to the space to control IAQ levels HVAC Mode HIGH COOL 15 This is a normal cool ing mode where a high cool...

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: ...er to the Remote Control Switch Input section for details on its use and operation CEM MODEL INSTALLED CEM This configuration in structs the control to communicate with the Controls Expansion Module CEM over the Local Equipment Network LEN when set to Yes When the unit is configured for certain sensors and configurations this option will be set to Yes automatically The sensors and configurations t...

Page 36: ...or Y2 then W1 initiates reheat and W2 initiates dehumidification Space Temp Sensor SPT S If a space temperature sensor is installed T55 T56 enable this configuration Space Temp Offset Sensor SP O S If a T56 sensor is installed with the space temperature offset slider enable this configuration Space Temp Offset Range SP O R If a space tempera ture offset sensor is installed it is possible to config...

Page 37: ...ontrol and per form VAV style operation The control will be able to call out a LOW COOL or a HIGH COOL mode and maintain a low or high cool supply air set point C TYP 6 SPT 2 STG This configuration will force the control to monitor the space temperature sensor to make a determination of mode and allow two stages of cooling MACHINE DEPENDENT CONFIGURATIONS Some configurations are linked to the phys...

Page 38: ... A1 A1 EN This configuration is used to disable the A1 compressor in case of failure Enable Compressor A2 A2 EN This configuration is used to disable the A2 compressor in case of failure Enable Compressor B1 B1 EN This configuration is used to disable the B1 compressor in case of failure Enable Compressor B2 B2 EN This configuration is used to disable the B2 compressor in case of failure CSB A1 Fe...

Page 39: ... methods by which it may select a cooling mode 1 Thermostat C TYP 3 and 4 The thermostat does not depend upon the state of occupancy or temperature and the modes are called out directly by the discrete inputs 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 Occupied VAV cooling types C TYP 1 and 2 are called out in...

Page 40: ...s L C ON minus L C OF 2 Comfort Trending In addition to the set points and offsets which determine the trip points for bringing on and bringing off cool modes there are 2 configurations which work to hold off the transitioning from a low cool to a high cool mode if the space is cooling down quickly enough This technique is referred to as Comfort Trending and the configurations of interest are C T ...

Page 41: ...pressor may come on For example on a 3 compressor unit if no compressors are currently on compressor A2 is currently under a minimum off compressor timeguard and 2 compressors are to be turned on then com pressors A1 and B1 will be turned on immediately instead of A1 and A2 Low Cool Versus High Cool Mechanical Staging The num ber of compressors to be requested during a cooling mode are divided int...

Page 42: ...ompressor stages See the Economizer Integration with Mechanical Cooling section for more information on the holding off of mechanical cooling as well as the economizer control point Table 49 2 Stage Sequence 48 50AJ AW020 027 Compressor start is delay 10 seconds from other compressor Table 50 2 Stage Sequence 48 50AJ AW030 060 Compressor start is delay 10 seconds from other compressor Table 51 Sta...

Page 43: ...y that the control is currently limited to Capacity Load Factor SMZ This factor builds up or down over time 100 to 100 and is used as the means of adding or subtracting a cooling stage during run time It is a normalized representation of the relationship between Sum and Z Next Stage EDT Decrease ADD R This variable repre sents if adding a stage of cooling how much the temperature should drop in de...

Page 44: ...ycled at very fast rates the set point could be maintained very precisely Since it is not desirable to cycle compressors more than 6 cy cles per hour slow change override takes care of keeping the PID under control when relatively close to set point SumZ Operation The SumZ algorithm is an adaptive PID style of control The PID is programmed within the control and the relative speed of staging can o...

Page 45: ...t to a linear relationship between the economizer damper position and OAT and RAT in the calculation of MAT SumZ Overrides There are a number of overrides to the SumZ algorithm which may add or subtract stages of cooling High Temp Cap Override H TMP Low Temp Cap Override L TMP Pull Down Cap Override PULL Slow Change Cap Override SLOW Economizer Trim Override The unit may drop stages of cooling whe...

Page 46: ...P minus the configured Loadshed Demand Delta SH DL A redline command or loadshed command will stay in effect until a Cancel redline or Cancel loadshed command is received or until the configurable Maximum Loadshed time SH TM has elapsed HEAD PRESSURE CONTROL Condenser head pressure control for the 48 50A series rooftops is controlled directly by the unit except when the unit is equipped and config...

Page 47: ...ing is active and HVAC mode LOW COOL EC C P Setpoints SA LO Inputs RSET SA S R If no mechanical cooling is active and HVAC mode HIGH COOL EC C P Setpoints SA HI Inputs RSET SA S R When the first stage of mechanical cooling has started EC C P 53 F plus any economizer suction pressure reset applied When the second stage of mechanical cooling has started EC C P 48 F plus any economizer suction pressu...

Page 48: ...figured 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 the System section for more information If the unit is allowed to select a heat mode then the next step is an evaluation of deman...

Page 49: ...ent trip points for the low and high heat modes there is a menu in the local display which lets the user quickly view the state of the system This menu also contains the cool trip points as well See Table 61 at the local display under Run Status TRIP Table 61 Mode Trip Helper Table The controlling temperature is TEMP and is in the middle of the table for easy reference Also the HVAC mode can be vi...

Page 50: ...for staged gas heating is controlled by the Integrated Gas Control IGC boards and unless the supply fan is on for a different reason will be controlled by the IGC IFO input The unit will control stages of heat to the heating control point Run Status VIEW HT C P The heating con trol point in a LOW HEAT HVAC mode for staged gas is the heating supply air set point Setpoints SA HT Staged Gas Heating P...

Page 51: ...e heat all boards are wired in parallel For staged gas heat each board is controlled sepa rately When energized an LED on the IGC board will be turned on See Table 68 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 act...

Page 52: ... 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 ON OFF ON OFF OFF OFF 50 4 ON ON ON OFF OFF OFF 58 5 ON ON ON ON OFF OFF 67 6 ON OFF ON OFF ON OFF 75 7 ON OFF ON ON ON OFF 83 8 ON ON ON ON ON OFF 92 9 ON ON ON ON ON OFF 100 STAGE RELAY OUTPUT CAPACITY Hea...

Page 53: ...ay under Setpoints Operation First the unit must be in a vent mode a low cool mode or a high cool HVAC mode to be considered for a tem pering mode Secondly the tempering mode is only allowed when the rooftop is configured for staged gas Configuration HEAT HT CF 3 If the control is configured for staged gas the control is in a vent low cool or high cool HVAC mode and the rooftop con trol is in a si...

Page 54: ...stalled 1 VFD Control This will enable the use of ComfortLink for static pressure control via a supply fan VFD Static Pressure Fan Control SP FN This is automatical ly set to Yes when SP CF VFD Control When the user would like the 4 to 20 mA output to trigger a VFD on as op posed to the fan relay SP FN may be set to Yes when SP CF none When the control turns the fan ON the control will send an SP ...

Page 55: ...D SP SG This is the system gain for the static pressure control PID control loop STATIC PRESSURE RESET The configuration for Static Pressure Reset is found under Configuration Unit Static Pressure Reset Sensor SP RS If the outdoor air quality sensor is not configured Configuration IAQ AQ CF OQ A C 0 then it is possible to use the outdoor air quality sensor location on the CEM board to perform stat...

Page 56: ...rent load conditions It will always be the lowest value under the given conditions and as the conditions and airflow set point at each terminal change throughout the operating period and so will the equipment static pressure set point The CCN system must have access to a CCN variable SPRESET which is part of the equipment controller In the algorithm for static pressure control the SPRESET value is...

Page 57: ...T S to ENABLE The state of the filter status switch can be read at Inputs GEN I FLT S See Table 72 Table 72 Dirty Filter Switch Points Monitoring of the filter status switch is disabled in the Service Test mode and when the supply fan is not commanded on If the fan is on and the unit is not in a test mode and the filter status switch reads dirty for 2 continuous minutes an alert is generated Recov...

Page 58: ...d 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 air Setting Configuration ECON E SEL 2 requires that the user configure Configuration ECON OA E C the Outdo...

Page 59: ...ime Configuration FC TM This option is a configurable time period prior to the next occupied period that the control will allow unoccu pied economizer free cooling to operate This option is only applicable when FC CF 2 Unoccupied Economizer Free Cooling Outside Lockout Temperature FC LO This configuration option allows the user to select an outside air temperature below which unoc cupied free cool...

Page 60: ...VIEW CL C P If the C TYP is either 4 or 6 and the unit is in a cool mode then If Stage 0 EC C P the Cooling Control Point Run Status VIEW CL C P If Stage 1 53 0 economizer suction pressure reset see below If Stage 2 48 0 economizer suction pressure reset see below NOTE To check the current cooling stage go to Run Status Cool CUR S If the C TYP is either 1 2 3 or 5 and the unit is in a cool mode th...

Page 61: ... exhaust when BP SL 1 Low Building Pressure Level BP LP This configuration is the threshold level below the building pressure set point used to control stages of power exhaust when BP SL 1 CONSTANT VOLUME 2 STAGE CONTROL BP CF 1 OPERATION Two exhaust fan relays will be turned on and off based on economizer position The two trip set points are BP P1 and BP P2 If the economizer is greater than or eq...

Page 62: ...onfiguration BP B CFG BP LP subtract a stage of power exhaust ITEM EXPANSION RANGE UNITS CCN POINT DEFAULT BP BUILDING PRESS CONFIG BP CF Building Press Config 0 2 BLDG_CFG 0 BP MT Power Exhaust Motors 1 2 PWRM 1 BP S Building Pressure Sensor Enable Dsable BPSENS Dsable BP R Bldg Press Range 0 1 00 BP_RANGE 0 25 BP SP Building Pressure Setp 0 25 0 25 H2O BPSP 0 05 BP P1 Power Exhaust On Setp 1 0 1...

Page 63: ...sensor is connected to the unit control the unit s IAQ routine allows a demand based control for ventilation air quantity by providing a modulating outside air damper position that is proportional to CO2 level The ventilation damper position is varied between a minimum ventilation level based on internal sources of contaminants and CO2 levels other than from the effect of people and the maximum de...

Page 64: ...the OAQ L limit Normally a linear control of the damper vs the IAQ control signal can be used but the control also supports non linear control Different curves can be used based on the Diff IAQ Responsiveness Variable IAQ R See Fig 11 SETTING UP THE SYSTEM The IAQ configuration op tions are under the Local Display Mode Configuration IAQ See Table 78 IAQ Analog Sensor Config Configuration IAQ AQ CF...

Page 65: ...ion with automatic fan IQ I F 2 Fan On Occupied Unoccupied IAQ demand will always override normal indoor fan opera tion and turn it on if off during both the occupied and unoccupied period Economizer Min Position Configuration IAQ DCV C EC MN This is the fully occupied minimum economizer position IAQ Demand Vent Min Pos Configuration IAQ DCV C IAQ M This configuration will be used to set the minim...

Page 66: ...led 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 damper position to be used during the pu...

Page 67: ...on mode If an associated sensor responsible for dehumidification fails dehumidification will not be attempted SPRH RARH Initiating a Reheat or Dehumidification Mode To call out a Reheat mode in the Vent or the Off HVAC mode or to call out a Dehumidification mode 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 humi...

Page 68: ...ARH Broadcast ORH B If this configuration is set to ON the control will periodically broadcast its outside air relative humidity at a rate of once every 30 minutes CCN OAQ Broadcast OAQ B If this configuration is set to ON the control will periodically broadcast its outside air quality reading at a rate of once every 30 minutes Global Schedule Broadcast G S B If this configuration is set to ON and...

Page 69: ...t Occ RA H O If the return air temperature is above the configurable occupied RAT High Alert Limit RA H O then Alert 305 will be generated and operation will continue The alert will automatically reset RAT Low Alert Limit Unocc RA L U If the return air temperature is below the configurable unoccupied RAT Low Alert Limit RA L U then Alert 304 will be generated Unit operation will continue but VAV h...

Page 70: ...n If a field supplied filter status switch is used that is normally closed for a clean filter change this variable to closed IGC Feedback Off IGC L The input for IGC feed back is set for normally open for off If a field supplied IGC feedback switch is used that is normally closed for feedback off change this variable to closed Remote Switch Off RMI L The remote switch is set for normally open when...

Page 71: ...t 0 NO REMOTE SW The remote switch will not be used 1 OCC UNOCC SW The remote switch input will control the occupancy state When the remote switch input is ON the unit will forced into the occupied mode When the remote switch is OFF the unit will be forced into the unoccupied mode 2 STRT STOP The remote switch input will start and stop the unit When the unit is commanded to stop any timeguards in ...

Page 72: ...of the month Day of Week DAY This variable is the current day of the week Monday 1 through Sunday 7 Year YEAR This variable is the current year for ex ample 2005 Local Time Schedule SCH L This submenu is used to program the time schedules There are 8 periods PER 1 through PER 8 Each time period can be used to set up a local schedule for the unit Refer to the Programming Operating Schedules section...

Page 73: ...d in applications where daylight savings time occurs The function will automatically correct the clock on the days configured for daylight savings time DAYLIGHT SAVINGS START DS ST This submenu configures the start date and time for daylight savings Daylight Savings Start Month DS ST ST MN This is the start month for daylight savings time The numbers 1 to 12 correspond to the months of the year e ...

Page 74: ...e Test mode The alarms must be reset before the circuit can operate in either Normal mode or Service Test mode Thermistor Troubleshooting The electronic con trol uses five 5K thermistors for the saturated condensing temperature sensor SCT A and SCT B See Tables 91 and 92 for temperature vs resistance data When replacing thermistors SDT A and SDT B reuse the original hardware These thermistors must...

Page 75: ...se Check for loose connection at compressor terminal 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 Noncondensables in system 4 Purge and recharge as required 5 Refrigerant overcharge 5 Purge as required 6 Line voltage incorrect 6 Consult power company 7 Refrigerant...

Page 76: ...gs are worn 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 ...

Page 77: ...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 78: ...78 Fig 12 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 79: ...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 80: ...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 81: ...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 82: ... 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 25 396 6 3 537 24 171...

Page 83: ...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 97 The current position commanded position and whether the econo mizer is active can be displayed All the disabling conditions for the economizer and outside air information is also displayed CO...

Page 84: ...n can be used to help determine why the unit is in the current mode CCN LINKAGE DISPLAY TABLE The CCN Linkage display table provides information on unit linkage See Table 100 COMPRESSOR RUN HOURS DISPLAY TABLE The Compressor Run Hours Display Table displays the number of run time hours for each compressor See Table 101 COMPRESSOR STARTS DISPLAY TABLE The Com pressor Starts Display Table displays t...

Page 85: ...ide LOW_TEMP PULL Pull Down Cap Override PULLDOWN SLOW Slow Change Cap Override SLO_CHNG ITEM EXPANSION RANGE UNITS POINT WRITE STATUS TRIP 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 ...

Page 86: ...properly the circuit will strike out causing the shutdown alarm for that particular circuit Once activated the shutdown alarm can only be cleared via an alarm reset Circuits with strikes are given an opportunity to reset their strike counter to zero As discussed above a strike typically causes the circuit to shut down Fifteen minutes later that circuit will once again be allowed to run If the circ...

Page 87: ...erant 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 circuit Auto...

Page 88: ... Static Pressure Below Limit Continue to run unit Automatic VFD problem broken fan belt T311 Supply Duct Static Pressure Above Limit Continue to run unit Automatic VFD problem broken fan belt T312 Building Static Pressure Below Limit Continue to run unit Automatic Exhaust issues check setpoint T313 Building Static Pressure Above Limit Continue to run unit Automatic Exhaust issues check setpoint T3...

Page 89: ...ermistor Failure Alert codes 064 and 065 are for circuits A and B respectively These alerts occur when the saturated condensing temperatures Temperatures REF T SCT A and SCT B are outside the range 40 to 240 F 40 to 116 C When this occurs the con trol uses the outdoor temperature OAT to control the outdoor fans The control will default to control based on the OAT sensor and will turn on OFC B when...

Page 90: ... 093 are for circuits A and B respectively These alerts occur when the pressure is outside the range 0 5 to 134 5 psig A circuit cannot run when this alert is active Use the Scrolling Marquee to reset the alert The cause of the alert is usually a faulty transducer faulty 5v power supply or a loose connection T110 Circuit A Loss of Charge T111 Circuit B Loss of Charge Alert codes 110 and 111 are fo...

Page 91: ... Module Comm Failure This alarm indicates that there are communications problems with the Controls Expansion Board All functions performed by the CEM will stop which can include demand limit reset fire control modes and the fan status switch The alarm will auto matically reset A173 ECB1 Board Communication Failure This alarm indicates that there are communications problems with the Economizer Cont...

Page 92: ...ct pressure sensor and the measured supply duct static pressure Pressures AIR P SP is below the configurable SP Low Alert Limit Configuration ALLM SP L for 5 minutes then the alert will occur The unit will continue to run and the alert will auto matically reset T311 Supply Duct Static Pressure Above Limit If the unit is a VAV unit with a supply duct pressure sensor and the measured supply duct sta...

Page 93: ...automatically T414 Belimo Actuator Jammed This alert occurs when the control software has detected that the damper is stuck Check the mechanical actuation of the dampers T414 Belimo Actuator Range Error This alert occurs when the economizer range of motion is less than 90 degrees Initiate economizer calibration Service Test INDP E CAL using the Service Test menu T420 R W1 Jumper Must be Installed ...

Page 94: ...NOMIZER BOARD ECB1 The ECB1 controls the economizer actuator and the power exhaust fans The ECB1 operates the economizer motor using a digital communication signal that also provides status and diagnostics for the econo mizer motor See Fig 23 The ECB1 also controls the operation of the power exhaust motors and provides up to 6 stages of dig itally sequenced power exhaust either based on the econom...

Page 95: ...95 Fig 13 Typical Main Control Box Wiring Schematic A48 7787 ...

Page 96: ...96 TO NEXT PAGE Fig 14 Auxiliary Control Box Wiring Schematic A48 7294 ...

Page 97: ...97 LEN PORT FOR USE WITH NAVIGATOR Fig 14 Auxiliary Control Box Wiring Schematic cont A48 7809 ...

Page 98: ...98 Fig 15 Typical 2 Stage Gas Heat Wiring Schematic Size 051 and 060 Units Shown A48 6866 ...

Page 99: ...99 TO NEXT PAGE Fig 16 Typical Staged Gas Heat Wiring Schematic Size 051 and 060 Units Shown A48 7296 ...

Page 100: ...100 FROM PREVIOUS PAGE Fig 16 Typical Staged Gas Heat Wiring Schematic Size 051 and 060 Units Shown cont A48 7297 ...

Page 101: ...101 Fig 17 Typical Electric Heat Control Schematic 50AJ AK AW AY Size 051 and 060 Units Shown A48 6689 ...

Page 102: ...102 TO NEXT PAGE Fig 18 Typical Power Schematic Size 051 and 060 Units Shown A48 7298 ...

Page 103: ...103 FROM PREVIOUS PAGE Fig 18 Typical Power Schematic Size 051 and 060 Units Shown cont A48 7299 ...

Page 104: ...104 Fig 19 Controls Option Wiring Schematic A48 7810 ...

Page 105: ...105 Fig 20 Small Chassis Component Location Size 020 035 Units A48 7301 ...

Page 106: ...106 Fig 21 Large Chassis Component Locations Size 036 060 Units A48 7302 ...

Page 107: ...rlock Relay 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 Bo...

Page 108: ...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 Filter Stat...

Page 109: ... 0 20mA in 6 GND 0 20mA OUTPUTS ECONOCMD Economizer actuator analog control 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 stag...

Page 110: ...GND 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 P...

Page 111: ...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 112: ...ensation 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 on all 230 3 60 and 460 3 60 units An ABB ACS800 or Toshiba E3 VFD is used on 575 3 60 units The interface wiring for the VFDs is shown in Fig 27 Terminal designations are shown in Table 112 Table 111 IGC Board Inputs and Output...

Page 113: ...rature Sensors and the low side pressure transducers the ComfortLink control displays the high and low side pressures and saturation temper atures and a normal gage set is not required SMOKE DETECTOR The units can be equipped with an optional smoke detector located in the return air The detector is wired to the ComfortLink controls and if activated will stop the unit by means of a special fire mod...

Page 114: ... used The room thermostat is connected to TB4 SPACE SENSOR The ComfortLink control supports the use of space temperature sensors The T55 and T56 sensors and CCN communicating T58 room sensor can be used The T55 and T56 sensors are connected to TB5 terminal 3 4 and 5 The T58 sensor is connected to the CCN connections on TB3 When a T55 T56 or T58 sensor is used the user must install the red jumpers ...

Page 115: ... w res or 0 5 VDC 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 T...

Page 116: ...nnections for potential communication errors J3 and J4 connectors A 3 wire sensor bus accomplishes commu nication between modules These 3 wires run in parallel from module to module Yellow LED The MBB has one yellow LED The Carrier Comfort Network CCN LED will blink during times of network communication The other boards do not have a CCN communications port CARRIER COMFORT NETWORK INTERFACE The 48...

Page 117: ...ERED MIXING BOX TO ADDITIONAL TERMINALS HEATING COOLING UNITS COMPUTER WITH ComfortView SOFTWARE ROOFTOP UNIT CL ROOFTOP UNIT CL ROOFTOP UNIT CL ROOFTOP UNIT CL CCN BUS CL COMFORT CONTROLLER COMFORT ID AIR TERMINAL LEGEND CCN Carrier Comfort Network CID ComfortID Controls CL ComfortLink Controls HVAC Heating Ventilation and Air Conditioning Fig 31 CCN System Architecture COMPUTER WITH ComfortVIEW ...

Page 118: ...NANCE AND CLEANING RECOMMEN DATION Routine cleaning of coil surfaces is essential to maintain proper operation of the unit Elimination of contami nation and removal of harmful residues will greatly increase the life of the coil and extend the life of the unit The following maintenance and cleaning procedures are recommended as part of the routine maintenance activities to extend the life of the co...

Page 119: ...s and apply cleaner with a vertical up and down motion Avoid spraying in horizontal pattern to minimize potential for fin damage 7 Ensure cleaner thoroughly penetrates deep into finned areas 8 Interior and exterior finned areas must be thoroughly cleaned 9 Finned surfaces should remain wet with cleaning solution for 10 minutes 10 Ensure surfaces are not allowed to dry before rinsing Reapplying cle...

Page 120: ...aring mounting bolts which secure the 2 bearings on either side of the coupling Remove the drive belts 2 Reassemble the coupling with the bearings loose This allows the coupling to find its own self alignment position 3 Check the hub to shaft fit for close fitting clearances Replace hubs if high clearances are determined 4 Check the key for close fitted clearances on the sides and 0 015 in clearan...

Page 121: ...nuts from the motor mounting hex bolts and remove motor 10 Replace the locktooth washer under the motor base with a new washer Be sure that the washer contacts the motor base surface 11 Reverse above steps to install new motor Condenser Fan Adjustment 1 Turn off unit power supply 2 Remove fan guard 3 Loosen fan hub setscrews 4 Adjust fan height on shaft using a straightedge placed across venturi a...

Page 122: ...ing device and replace 1 8 in pipe plug and screw cap 11 Turn main gas valve to ON position and check heating operation Main Burners For all applications main burners are factory set and should require no adjustment MAIN BURNER REMOVAL Fig 41 1 Shut off field supplied manual main gas valve 2 Shut off power supply to unit 3 Remove heating access panel 4 Disconnect gas piping from gas valve inlet 5 ...

Page 123: ...tside Air Enthalpy OAE 84 O AIR OA D T OutsideAir Dewpoint Temp dF OADEWTMP 84 COOL COOLING INFORMATION C CAP Current Running Capacity CAPTOTAL 83 CUR S Current Cool Stage COOL_STG 83 MAX S Maximum Cool Stages CLMAXSTG 83 DEM L Active Demand Limit DEM_LIM forcible 83 SUMZ COOL CAP STAGE CONTROL 83 SUMZ SMZ Capacity Load Factor SMZ 83 SUMZ ADD R Next Stage EDT Decrease deltaF ADDRISE 83 SUMZ SUB R ...

Page 124: ... 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 CMPB1TS...

Page 125: ...0 dF TEMPVUNC 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 St...

Page 126: ...y 2 ON OFF HS2 HT 3 Relay 3 W1 Gas Valve 2 ON OFF HS3 HT 4 Relay 4 W2 Gas Valve 2 ON OFF HS4 HT 5 Relay 5 W1 Gas Valve 3 ON OFF HS5 HT 6 Relay 6 W2 Gas Valve 3 ON OFF HS6 H I R Heat Interlock Relay 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 ...

Page 127: ...rop Gain 0 1 5 HT_PGAIN 1 50 SG CF HT D Heat Control Derv Gain 0 1 5 HT_DGAIN 1 50 SG CF HT TM Heat PID Rate Config 60 300 sec HTSGPIDR 90 50 SP SUPPLY STATIC PRESS CFG SP CF Static Pressure Config 0 1 multi text strings STATICFG No 54 SP FN Static Pres Fan Control Yes STATPFAN Yes 54 SP S Static Pressure Sensor Enable Disable SPSENS Disable 54 SP LO Static Press Low Range 10 0 SP_LOW 0 54 SP HI S...

Page 128: ...n 0 100 ECONOMIN 5 63 64 DCV C IAQ M IAQ Demand Vent Min Pos 0 100 IAQMINP 0 63 64 AQ CF AIR QUALITY CONFIGS AQ CF IQ A C IAQ Analog Sensor Config 0 4 multi text strings IAQANCFG 0 64 AQ CF IQ A F IAQ 4 20 ma Fan Config 0 2 multi text strings IAQANFAN 0 65 AQ CF IQ I C IAQ Discrete Input Config 0 2 multi text strings IAQINCFG 0 65 AQ CF IQ I F IAQ Disc In Fan Config 0 2 multi text strings IAQINFAN...

Page 129: ... hi alert limit unocc 40 245 dF RAHU 100 69 R RH L RARH low alert limit 0 100 RRHL 0 69 R RH H RARH high alert limit 0 100 RRHH 100 69 SP L SP low alert limit 0 5 H2O SPL 0 69 SP H SP high alert limit 0 5 H2O SPH 2 69 BP L BP lo alert limit 0 25 0 25 H2O BPL 0 25 69 BP H BP high alert limit 0 25 0 25 H2O BPH 0 25 69 IAQ H IAQ high alert limit 0 5000 IAQH 1200 69 TRIM SENSOR TRIM CONFIG SAT T Air T...

Page 130: ...1 73 HD 01 LEN Duration Days 0 99 HOL_LEN1 73 Repeated for holidays 2 30 DAY S DAYLIGHT SAVINGS TIME DS ST DAYLIGHT SAVINGS START DS ST ST MN Month 1 12 STARTM 4 73 DS ST ST WK Week 1 5 STARTW 1 73 DS ST ST DY Day 1 7 STARTD 7 73 DS ST MIN A Minutes to Add 0 90 MINADD 60 73 DS SP DAYLIGHTS SAVINGS STOP DS SP SP MN Month 1 12 STOPM 10 73 DS SP SP WK Week 1 5 STOPW 5 74 DS SP SP DY Day 1 7 STOPD 7 7...

Page 131: ...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 132: ...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 133: ...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 134: ...ff CCN 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 X...

Page 135: ... 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 alert limit 0 5 H2O SPL 0 SP high alert limit 0 5 H2O SPH 2 BP lo alert limit 0 25 0 25 H2O BPL 0 25 BP high alert limit 0 25 0 25 H2O BPH 0 25 IAQ high alert limit 0 5000 IAQH 1200 BP__ Building Press Config 0 2 BLDG_C...

Page 136: ...N Economizer Installed Yes No ECON_ENA Yes Economizer Min Position 0 100 ECONOMIN 20 Economizer Max Position 0 100 ECONOMAX 98 Economzr trim for sumZ Yes No ECONTRIM Yes Econ ChangeOver Select 0 3 ECON_SEL 1 OA Enthalpy ChgOvr Selct 1 5 OAEC_SEL 2 Outdr Enth Compare Value 18 28 OAEN_CFG 24 High OAT Lockout Temp 55 120 dF OAT_LOCK 60 OA Dewpoint Temp Limit 50 62 dF OADEWCFG 55 Outside Air RH Sensor...

Page 137: ...5 70 dF IAQPNTLO 50 SP__ Static Pres VFD Control No STATICFG No Static Pres Fan Control Yes STATPFAN Yes Static Pressure Sensor Enable Disable SPSENS Disable Static Press Low Range 10 0 SP_LOW 0 Static Press High Range 0 10 SP_HIGH 5 Static Pressure Setpoint 0 5 H2O SPSP 1 5 VFD Minimum Speed 10 50 STATPMIN 20 VFD Maximum Speed 50 100 STATPMAX 100 VFD Fire Speed Override 0 100 STATPFSO 100 Stat Pr...

Page 138: ...PXRTYPE 0 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 Space Temp Sensor Enable Disable SPTSENS Disable Space Temp Offset Sensor Enable Disable SPTOSENS Disable Space Temp Offset Range 1 10 F SPTO_RNG 5 Return Air...

Page 139: ...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 140: ...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 141: ...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 142: ...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 143: ...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 144: ...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 145: ...control The HELP button is used to access the help screens PARAMETER GROUP PARAMETER TITLE PARAMETER INDEX CARRIER DEFAULT Start Up Data LANGUAGE 9901 ENGLISH APPLIC MACRO 9902 USER 1 MOTOR CTRL MODE 9904 SCALAR FREQ MOTOR NOM VOLT 9905 460v MOTOR NOM CURR 9906 TBD MOTOR NOM FREQ 9907 60 Hz MOTOR NOM SPEED 9908 1750 rpm Start Stop Dir EXT1 COMMANDS 1001 DI 1 DIRECTION 1003 REVERSE Analog Inputs MI...

Page 146: ... mode press EXIT until the LCD display shows status information as described below See Fig C The top line of the LCD display shows the basic status information of the drive The HAND icon indicates that the drive control is local from the control panel The AUTO icon indicates that the drive is in remote control mode such as the basic I O X1 or field bus The arrow icon indicates the drive and motor ...

Page 147: ...s Parameters 9905 9906 9907 9908 9909 1605 1607 5201 and group 51 parameters and internal motor parameters are not copied Upload All Parameters To upload and store parameters in the control panel from the VFD perform the following procedure 1 Select MENU SOFT KEY 2 The Main menu will be displayed 2 Use the UP or DOWN keys to highlight PAR BACKUP on the display screen and press ENTER SOFT KEY 2 3 U...

Page 148: ... 1 twice to return to the main menu Third Party Controls For conversion to third party control of the VFD perform the following procedure 1 Remove the factory installed jumper between X1 10 and X1 13 control of VFD start stop 2 Remove the factory installed jumper between X1 10 and X1 16 and replace with a normally closed safety contact for control of VFD start enable 3 Install speed signal wires t...

Page 149: ...meters 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 Check fault setup 3018 C...

Page 150: ...ation 3001 2008 PANEL LOSS Panel communication is lost and either the VFD is in local control mode the control panel displays HAND or the VFD is in remote control mode AUTO and is parameterized to accept start stop direction or reference from the control panel To correct check the communication lines and connections Parameter 3002 PANEL LOSS and parameters in groups 10 COMMAND INPUTS and 11 REFERE...

Page 151: ...n spite of heat sink cleaning If the drive is operated in a critical part of a process fan replacement is recommended once these symptoms start appearing Replacement fans are available from Carrier To replace the main fan for frame sizes R1 through R4 perform the following see Fig D 1 Remove power from drive 2 Remove drive cover 3 For frame sizes R1 and R2 press together the retaining clips on the...

Page 152: ...s FIRE FSD is in alarm HVAC mode Fire Shut Down OFF Else HVAC mode Disabled OFF Else If The rooftop is not in factory test and a fire smoke control mode is alarming If the pressurization input Inputs FIRE PRES is in alarm HVAC mode Pressurization Else If the evacuation input Inputs FIRE EVAC is in alarm HVAC mode Evacuation Else If the smoke purge input Inputs FIRE PURG is in alarm HVAC mode Smoke...

Page 153: ...in reheat mode HVAC mode Dehumidification The unit is operating in dehumidification mode HVAC mode Vent This is a normal operation mode where no heating or cooling is required and outside air is being delivered to the space to control IAQ levels HVAC mode Low Cool This is a normal cooling mode when a low cooling demand exists HVAC mode High Cool This is a normal cooling mode when a high cooling de...

Page 154: ...nt 48A only 122 Generics table 5 Head pressure control 46 Heat mode diagnostic help 49 Heat mode selection process 48 Heating 30 Heating control 47 Hot gas bypass 72 HVAC modes 33 Independent outputs 30 Indoor air quality control 63 Indoor air quality options 28 Internal wiring 7 Local display tables 123 130 Lubrication 120 Main burners 122 Major system components 94 117 Mode trip helper 84 Modes ...

Page 155: ...s Yes No No ALTI Altitude in feet 0 60000 0 DLAY Startup Delay Time 0 900 sec 0 STAT TSTAT_Both Heat and Cool Yes No No 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 Air RH Sensor Enable Disable Disable SENS FLT S Filter Stat Sw Enabled Enable Disa...

Page 156: ...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 157: ...d Time 0 120 min 60 D L S1 Demand Limit Sw 1 Setpt 0 100 80 D L S2 Demand Limit Sw 2 Setpt 0 100 50 IAQ INDOOR AIR QUALITY CFG DCV C DCV ECONOMIZER SETPOINTS DCV C EC MN Economizer Min Position 0 100 5 DCV C IAQ M IAQ Demand Vent Min Pos 0 100 0 AQ CF AIR QUALITY CONFIGS AQ CF IQ A C IAQ Analog Sensor Config 0 4 multi text strings 0 AQ CF IQ A F IAQ 4 20 ma Fan Config 0 2 multi text strings 0 AQ C...

Page 158: ... 40 245 dF 100 SA L U EDT lo alert limit unocc 40 245 dF 40 SA H U EDT hi alert limit unocc 40 245 dF 100 RA L O RAT lo alert limit occ 40 245 dF 60 RA H O RAT hi alert limit occ 40 245 dF 90 RA L U RAT lo alert limit unocc 40 245 dF 40 RA H U RAT hi alert limit unocc 40 245 dF 100 R RH L RARH low alert limit 0 100 0 R RH H RARH high alert limit 0 100 100 SP L SP low alert limit 0 5 H2O 0 SP H SP ...

Page 159: ...NED 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 __________ COMPRESSOR AMPS COMPRESSOR NO 1 L1 __________ L2 __________ L3 _________ COMPRESSOR AMPS COMPRESSOR NO 2 L1 __________ L2 __________ L3 _________ SUPPLY FANS AMP...

Page 160: ...ime specifications or designs without notice and without incurring obligations Catalog No 04 53480037 01 Printed in U S A Form 48 50A 4T Pg CL 6 8 06 Replaces 48 50A 3T Book 1 1 Tab 1a 1b Copyright 2006 Carrier Corporation CUT ALONG DOTTED LINE CUT ALONG DOTTED LINE ...

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Carrier WEATHERMAKER 48AJ020, Operating And Service Manual

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