Carrier 48PG24 Controls, Start-Up, Operation, Service And Troubleshooting Instructions Download

Page: 1 / 112

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

Catalog No. 04-53480028-01

Printed in U.S.A.

Form 48/50PG-5T

Pg 1

6-06

Replaces: 48/50PG-2T

Book 1

Tab

1a 1b

Controls, Start-Up, Operation, Service and

Troubleshooting Instructions

CONTENTS

Page

SAFETY CONSIDERATIONS

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

GENERAL

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

BASIC CONTROL USAGE

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5

ComfortLink™ Control

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

Scrolling Marquee

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

Accessory Navigator™ Display

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

Operation

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

System Pilot™

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

CCN Tables and Display

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

Conventions Used in this Manual

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

START-UP

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-35

Unit Preparation

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

Compressor Mounting

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

Refrigerant Service Ports

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

Crankcase Heater(s)

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

Compressor Rotation

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

Internal Wiring

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

Subcooler Heat Exchanger (SHX)

. . . . . . . . . . . . . . . . . . . . . . . . . .6

Evaporator Fan

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

Condenser Fans and Motors

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

Return-Air Filters

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

Outdoor-Air Inlet Screens

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

Gas Heat (48PG Only)

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

Orifice Change (48PG Only)

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

Power Supply

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

Air Baffles

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

Accessory Installation

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

CONTROLS QUICK START

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35,36

Thermostat Control

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

Space Temperature Sensor Control —

Direct Wired (T-55 or T-56)

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

Space Temperature Sensor Control — CCN (T-58)

. . . . . . . . .35

Space Temperature Sensor Control — CCN Linkage

. . . . . .35

Space Humidity Control — Humidistat

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

Space Humidity Control — Thermidistat™

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

Space Humidity Control — Relative Humidity Sensor

. . . . .35

CCN Communication

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

Accessories

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

Service Test

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

Control Configuration Checklist

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

Programming Operating Schedules

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

SERVICE TEST

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36-38

THIRD PARTY CONTROL

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38,39

Thermostat

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38

Humidistat

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38

Humidity Sensor

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38

Remote Occupancy

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38

Fire Shutdown

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38

Alarm Output

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38

Outdoor Enthalpy

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38

IAQ Switch

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39

IAQ Sensor

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39

OAQ Sensor

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39

CONTROLS OPERATION

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39-52

Display Configuration

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39

Modes

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39

Unit Configuration

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39

Occupancy Determination

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40

Indoor Fan

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41

Cooling

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41

• THERMOSTAT CONTROL

Page

• SPACE SENSOR CONTROL

• OUTDOOR FANS

Gas Heating (48PG Units)

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

• THERMOSTAT CONTROL

• SPACE SENSOR CONTROL

• SUPPLY AIR TEMPERATURE (SAT) SENSOR

Electric Heat (50PG Units)

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

• THERMOSTAT CONTROL

• SPACE SENSOR CONTROL

• SUPPLY AIR TEMPERATURE (SAT) SENSOR

Economizer

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

• THERMOSTAT CONTROL

• SPACE SENSOR CONTROL

• ECONOMIZER ACTUATOR COMMUNICATIONS

• UNOCCUPIED FREE COOLING

• POWER EXHAUST

Optional Humdi-MiZer Dehumidification System

. . . . . . . . . 45

• SETTING UP THE SYSTEM

• REHEAT MODE SELECTION PROCESS

• REHEAT MODE DIAGNOSTIC HELP

• AIR BAFFLES

Indoor Air Quality

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

Temperature Compensated Start

. . . . . . . . . . . . . . . . . . . . . . . . . 51

Carrier Comfort Network® (CCN) Configuration

. . . . . . . . . . 51

Alarm Handling

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

TROUBLESHOOTING

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52-67

Complete Unit Stoppage

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

Restart Procedure

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

Control Module Communication

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

Alarms and Alerts

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

• VIEWING AND CLEARING UNIT ALARMS

• DIAGNOSTIC ALARM CODES AND POSSIBLE CAUSES

Cooling Troubleshooting

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

Humidi-MiZer Troubleshooting

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

Economizer Troubleshooting

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

Heating Troubleshooting

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

Phase Loss Protection

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

Thermistor Troubleshooting

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

Transducer Troubleshooting

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

Forcing Inputs and Outputs

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

MAJOR SYSTEM COMPONENTS

. . . . . . . . . . . . . . . . . . . . . . 67-84

General

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

Main Base Board (MBB)

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

Economizer Control Board (ECB)

. . . . . . . . . . . . . . . . . . . . . . . . 67

Integrated Gas Control (IGC) Board

. . . . . . . . . . . . . . . . . . . . . . 67

Low Voltage Terminal Strip (TB2)

. . . . . . . . . . . . . . . . . . . . . . . . . 67

Scrolling Marquee Display

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80

Accessory Navigator™ Display

. . . . . . . . . . . . . . . . . . . . . . . . . . . 80

Carrier Comfort Network® Interface

. . . . . . . . . . . . . . . . . . . . . . 80

Subcooler Heat Exchanger

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80

Field-Installed Accessories

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82

• SPACE TEMPERATURE SENSOR (T-55)

• SPACE TEMPERATURE SENSOR (T-56)

• SPACE TEMPERATURE SENSOR (T-58)

• SPACE TEMPERATURE SENSOR AVERAGING

• ECONOMIZER

• POWER EXHAUST

• TWO-POSITION DAMPER

• INDOOR AIR QUALITY

• OUTDOOR AIR QUALITY

• SMOKE DETECTORS

• FILTER STATUS

• FAN STATUS

48/50PG20-28

Single Package Rooftop Units

with COMFORTLINK™ Controls

and PURON® (R-410A) Refrigerant

Summary of Contents for 48PG24

Page 1: ...39 Modes 39 Unit Configuration 39 Occupancy Determination 40 Indoor Fan 41 Cooling 41 THERMOSTAT CONTROL Page SPACE SENSOR CONTROL OUTDOOR FANS Gas Heating 48PG Units 42 THERMOSTAT CONTROL SPACE SENSO...

Page 2: ...e control provides high speed communications for remote monitoring via the Internet Multiple units can be linked together and to other ComfortLink control equipped units using a 3 wire communi cation...

Page 3: ...display category as shown under the RUN STATUS category To show the top level display press the key until a blank display is shown Then use the and arrow keys to scroll through the top level categorie...

Page 4: ...configuration points for the lo cal display Scrolling Marquee or Navigator accessory will be used in this manual Point names will be written with the Mode name first then any submodes then the point...

Page 5: ...nd RH HB Circuit A Lockout Temp CA LO Circuit B Lockout Temp CB LO Circuit C Lockout Temp CC LO Heating Lockout Temp HT LO Econo Cool Hi Temp Limit EH LO Econo Cool Lo Temp Limit EL LO Free Cool Low T...

Page 6: ...or air quantity limits See Tables 29 and 30 for evaporator fan motor specifications See Tables 31 and 32 for accessory FIOP static pressure See Tables 33 and 34 for fan rpm at various motor pulley set...

Page 7: ...sure that all accessories including space thermostats and sensors have been installed and wired as required by the instructions and unit wiring diagrams Table 3 Fan Performance 48PGD020 Vertical Suppl...

Page 8: ...3 33 851 3 68 904 4 02 952 4 34 998 4 66 7500 842 3 93 897 4 30 947 4 65 994 5 00 1038 5 33 8000 891 4 59 943 4 98 991 5 35 1036 5 71 1079 6 07 8500 940 5 32 990 5 72 1036 6 11 1080 6 49 1121 6 87 90...

Page 9: ...3 33 851 3 68 904 4 02 952 4 34 998 4 66 7500 842 3 93 897 4 30 947 4 65 994 5 00 1038 5 33 8000 891 4 59 943 4 98 991 5 35 1036 5 71 1079 6 07 8500 940 5 32 990 5 72 1036 6 11 1080 6 49 1121 6 87 90...

Page 10: ...966 5 15 1012 5 52 1056 5 88 8 500 906 5 05 959 5 47 1008 5 87 1053 6 26 1096 6 64 9 000 952 5 81 1004 6 25 1051 6 67 1095 7 07 1136 7 47 9 500 999 6 63 1049 7 09 1094 7 53 1137 7 95 1177 8 36 10 000...

Page 11: ...8 991 5 35 1036 5 71 1079 6 07 8 500 940 5 32 990 5 72 1036 6 11 1080 6 49 1121 6 87 9 000 990 6 12 1037 6 54 1082 6 95 1124 7 35 1163 7 73 9 500 1039 7 00 1085 7 43 1128 7 85 1168 8 27 1207 8 67 10 0...

Page 12: ...8 991 5 35 1036 5 71 1079 6 07 8 500 940 5 32 990 5 72 1036 6 11 1080 6 49 1121 6 87 9 000 990 6 12 1037 6 54 1082 6 95 1124 7 35 1163 7 73 9 500 1039 7 00 1085 7 43 1128 7 85 1168 8 27 1207 8 67 10 0...

Page 13: ...2 8 17 1169 8 59 1203 8 99 10 000 1079 7 95 1137 8 68 1180 9 21 1216 9 66 1249 10 08 10 500 1126 8 94 1184 9 75 1227 10 33 1263 10 81 1296 11 25 11 000 1172 10 00 1232 10 90 1274 11 52 1310 12 04 1342...

Page 14: ...8 25 9 500 1085 7 64 1128 8 12 1164 8 54 1198 8 93 1229 9 31 10 000 1137 8 69 1179 9 20 1214 9 64 1247 10 05 1278 10 45 10 500 1190 9 82 1230 10 37 1265 10 84 1297 11 27 1327 11 68 11 000 1242 11 05 1...

Page 15: ...8 25 9 500 1085 7 64 1128 8 12 1164 8 54 1198 8 93 1229 9 31 10 000 1137 8 69 1179 9 20 1214 9 64 1247 10 05 1278 10 45 10 500 1190 9 82 1230 10 37 1265 10 84 1297 11 27 1327 11 68 11 000 1242 11 05 1...

Page 16: ...00 691 2 75 748 3 06 805 3 39 859 3 73 911 4 07 7500 732 3 24 786 3 57 839 3 91 891 4 25 941 4 61 8000 775 3 79 824 4 12 874 4 47 924 4 83 972 5 19 8500 817 4 40 863 4 74 911 5 09 958 5 46 1003 5 84 9...

Page 17: ...4 12 874 4 47 924 4 83 972 5 19 8 500 817 4 40 863 4 74 911 5 09 958 5 46 1003 5 84 9 000 860 5 06 904 5 41 948 5 77 993 6 15 1036 6 54 9 500 903 5 79 944 6 14 986 6 51 1028 6 90 1070 7 29 10 000 947...

Page 18: ...500 1002 6 89 1047 7 72 1115 8 78 1167 9 52 1207 10 06 11 000 1047 7 73 1086 8 53 1150 9 65 1205 10 50 1247 11 13 11 500 1092 8 63 1126 9 41 1185 10 54 1242 11 53 1286 12 24 12 000 1137 9 61 1168 10...

Page 19: ...066 3 52 5500 937 3 26 988 3 56 1036 3 53 1083 3 90 1127 4 28 6000 1013 3 58 1060 3 96 1105 4 35 1149 4 75 1191 5 16 6500 1089 4 48 1133 4 89 1175 5 31 1216 5 73 1256 6 17 7000 1166 5 52 1207 5 96 124...

Page 20: ...3 04 984 3 34 1035 3 33 1083 3 69 5500 952 3 38 1003 3 32 1053 3 70 1100 4 09 1145 4 49 6000 1029 3 74 1077 4 15 1123 4 56 1167 4 98 1210 5 41 6500 1106 4 67 1151 5 11 1194 5 56 1236 6 01 1276 6 47 7...

Page 21: ...3 04 984 3 34 1035 3 33 1083 3 69 5500 952 3 38 1003 3 32 1053 3 70 1100 4 09 1145 4 49 6000 1029 3 74 1077 4 15 1123 4 56 1167 4 98 1210 5 41 6500 1106 4 67 1151 5 11 1194 5 56 1236 6 01 1276 6 47 7...

Page 22: ...937 3 26 988 3 56 1036 3 53 1083 3 90 1127 4 28 6 000 1013 3 58 1060 3 96 1105 4 35 1149 4 75 1191 5 16 6 500 1089 4 48 1133 4 89 1175 5 31 1216 5 73 1256 6 17 7 000 1166 5 52 1207 5 96 1247 6 41 1285...

Page 23: ...Bhp Rpm Bhp Rpm Bhp 5 500 952 3 38 1003 3 32 1053 3 70 1100 4 09 1145 4 49 6 000 1029 3 74 1077 4 15 1123 4 56 1167 4 98 1210 5 41 6 500 1106 4 67 1151 5 11 1194 5 56 1236 6 01 1276 6 47 7 000 1184 5...

Page 24: ...Bhp Rpm Bhp Rpm Bhp 5 500 952 3 38 1003 3 32 1053 3 70 1100 4 09 1145 4 49 6 000 1029 3 74 1077 4 15 1123 4 56 1167 4 98 1210 5 41 6 500 1106 4 67 1151 5 11 1194 5 56 1236 6 01 1276 6 47 7 000 1184 5...

Page 25: ...07 9 500 1127 8 11 1146 8 32 1167 8 57 1190 8 84 1215 9 13 10 000 1184 9 27 1202 9 49 1221 9 73 1243 10 00 1266 10 29 10 500 1242 10 52 1258 10 75 1276 10 99 1296 11 26 1318 11 55 11 000 1299 11 88 13...

Page 26: ...71 1158 7 99 1185 8 29 9 500 1145 8 32 1165 8 55 1187 8 80 1211 9 08 1236 9 39 10 000 1203 9 50 1222 9 74 1243 10 00 1265 10 28 1288 10 58 10 500 1261 10 79 1279 11 03 1299 11 29 1319 11 58 1341 11 88...

Page 27: ...71 1158 7 99 1185 8 29 9 500 1145 8 32 1165 8 55 1187 8 80 1211 9 08 1236 9 39 10 000 1203 9 50 1222 9 74 1243 10 00 1265 10 28 1288 10 58 10 500 1261 10 79 1279 11 03 1299 11 29 1319 11 58 1341 11 88...

Page 28: ...3 02 807 3 30 857 3 59 902 3 88 944 4 17 7500 800 3 58 850 3 86 898 4 16 942 4 47 982 4 77 8000 847 4 20 894 4 48 940 4 80 982 5 11 1022 5 43 8500 894 4 88 939 5 17 982 5 49 1024 5 82 1062 6 14 9000...

Page 29: ...8 940 4 80 982 5 11 1022 5 43 8 500 894 4 88 939 5 17 982 5 49 1024 5 82 1062 6 14 9 000 941 5 63 983 5 92 1025 6 24 1065 6 58 1103 6 92 9 500 989 6 45 1029 6 74 1069 7 07 1108 7 41 1144 7 77 10 000 1...

Page 30: ...953 5 18 988 5 48 1021 5 77 1053 6 07 8 500 965 5 63 1003 5 99 1037 6 32 1069 6 62 1100 6 93 9 000 1017 6 50 1054 6 89 1087 7 23 1118 7 55 1147 7 87 9 500 1069 7 45 1105 7 86 1137 8 22 1167 8 56 1195...

Page 31: ...208 3700 85 8 4 26 3 17 10 6 3 7 230 3700 85 8 4 26 3 17 9 6 3 7 460 3700 85 8 4 26 3 17 4 8 5 575 5015 87 5 5 88 4 39 6 0 Mid High Horizontal 5 208 4578 87 5 5 37 4 01 15 8 5 230 5115 87 5 6 00 4 48...

Page 32: ...10 460 9330 89 5 11 19 8 35 15 0 10 575 9711 89 5 11 65 8 69 12 0 Low Horizontal 5 208 4578 87 5 5 37 4 01 15 8 5 230 5115 87 5 6 00 4 48 15 4 5 460 5115 87 5 6 00 4 48 7 7 5 575 5015 87 5 5 88 4 39 6...

Page 33: ...zontal 5 208 4578 87 5 5 37 4 01 15 8 5 230 5115 87 5 6 00 4 48 15 4 5 460 5115 87 5 6 00 4 48 7 7 5 575 5015 87 5 5 88 4 39 6 0 Mid High Horizontal 7 5 208 6458 88 5 7 66 5 71 22 0 7 5 230 7169 88 5...

Page 34: ...0 4 800 0 01 0 02 0 03 5 000 0 01 0 02 0 04 6 000 0 02 0 04 0 06 7 000 0 03 0 06 0 08 8 000 0 04 0 08 0 12 9 000 0 05 0 10 0 15 10 000 0 06 0 13 0 20 11 500 0 09 0 18 0 27 FIOP Factory Installed Optio...

Page 35: ...ccessory Dehum output to terminal Humidistat1 located on the field connection terminal strip in the bottom of the control box The Space Humidity Switch set ting is located at Configuration Unit RH SW...

Page 36: ...le SERVICE TEST The Service Test function can be used to verify proper oper ation of compressors heating stages indoor fan outdoor fans power exhaust fans economizer and alarm relay Use of Service Tes...

Page 37: ...n Period NO Scrolling stops YES Select YES YES Change accepted MON 1 YES Monday In Period Item Value Units scrolls again TUE 1 NO Tuesday In Period NO Scrolling stops YES Select YES YES Change accepte...

Page 38: ...VAC signal input for fire shutdown For 48 series units with Humidi MiZer system input at wire harness plug 19 PL 19 PL 19 3 24 VAC source for dry contact PL 19 5 24 VAC signal for Fire Shutdown PL 19...

Page 39: ...on lockouts are located on the display at two locations Run Status MODE and Operating Modes MODE System Mode SYS In Run Status the current system mode is displayed as a number with expandable text In...

Page 40: ...ted Start Heating Factor TCS H This factor is used in the equation of the Temperature Compen sated Start Time Bias for heating A setting of 0 minutes indicates Temperature Compensated Start in Heating...

Page 41: ...mizer is cooling Cooling begins when the Y1 input is ener gized The economizer will try to provide cooling as described in the Economizer section If the economizer is not available for cooling or the...

Page 42: ...ase a field replacement of a control board occurs and the settings need to be checked or manually config ured Outdoor fan operation is further described below to assist in troubleshooting Units Withou...

Page 43: ...al heat is required and the MBB senses that W2 is On the MBB will turn on the HT 2 relay which sends power to the second stage of the main gas valve If the thermo stat removes the call for W2 the unit...

Page 44: ...1 output During continuous fan the indoor fan will follow the G input If the user has selected Adaptive see Cooling section for thermostat mode the algorithm will follow the configurable delays for ad...

Page 45: ...upied free cooling is disabled Configuration ECON UEFC 1 Unoccupied When UEFC 1 unoccupied free cooling can occur whenever the building is unoccupied Configuration ECON UEFC 2 Preoccupancy When UEFC 2...

Page 46: ...operate when circuit B is on This applies to normal operation service test and for control alarm respons es This operation difference is required due to the fact that the Motormaster outdoor fan contr...

Page 47: ...a time delay in staged decrease of multiple circuits in Reheat2 mode This delay is overridden by a zero demand for dehumidification or a positive demand for cooling Reheat2 Stage Incr Time R INC If u...

Page 48: ...of On will turn on circuits A and B in Reheat2 mode Service Test HMZR CRC Cool Reheat1 Valve Test A value of On will turn on the CRC relay This will energize RH1 A and RH1 B Service Test HMZR RHV A R...

Page 49: ...Econo mizer Minimum Position EC MN The AQ MN should be set to an economizer position that brings in enough fresh air to remove contaminants and CO2 generated by sources other than people The EC MN sho...

Page 50: ...OR AIR QUALITY Analog Input The ComfortLink control is configured for outdoor air quality sen sors which provide 4 to 20 mA for 0 to 2000 ppm If a sensor has a different range the ppm display range mu...

Page 51: ...to the Occupied mode The Start Bias Time will be written into the CCN Linkage Equipment Table if the unit is controlled in DAV mode If the Unoccupied Economizer Free Cool mode is active when temperatu...

Page 52: ...f striking alerts for refrigerant circuits until the circuit has been shut down due to 3 strikes Set the cooling configuration of Alert Each Strike Configuration COOL ALM N on display ALM_NOW on CCN t...

Page 53: ...Low refrigerant or faulty suction pressure transducer T126 Circuit A High Refrigerant Pressure Shutdown Circuit A Automatic An overcharged system high outdoor ambient temperature coupled with dirty ou...

Page 54: ...isplaying the alarm code number Be sure to expand description for each code because in some cases there are different possible descriptions and causes for the same code number DIAGNOSTIC ALARM CODES A...

Page 55: ...a return air sensor There is no control action as a result of this alert This alert resets automatically The cause of the alert is usually a faulty thermistor a shorted or open thermistor caused by a...

Page 56: ...e found at variable Configuration UNIT FS SW Verify that the con figuration is set correct verify the wiring and auxiliary device This alarm resets automatically Alert Code T408 Dirty Air Filter This...

Page 57: ...e 43 Verify any unique control configurations per in stalled site requirements or accessories If alarms conditions are corrected and cleared operation of the compressors and fans may be verified by us...

Page 58: ...restricted Clean coil or remove restriction Excessive Condenser Pressures Loose condenser thermistors Tighten thermistors Dirty condenser coil Clean coil Refrigerant overcharge Recover excess refrige...

Page 59: ...crolling Marquee Check Wiring Check transformer and circuit beaker or fuses Solenoid coil burnout Check continuous over voltage is less than 10 Check under voltage is less than 15 Check for missing co...

Page 60: ...AUSE REMEDY Damper Does Not Move Indoor Fan is off Check for proper thermostat connection Unit is not configured for continuous fan operation and the thermostat is not calling for heating or cooling U...

Page 61: ...en in applying thermocouple and taking readings Table 47 Gas Heating Service Analysis LED STATUS FUNCTION On Continuously Relay contact closed normal operation Blinking Relay contact open phase loss o...

Page 62: ...ltage and oper ation of IGC motor Check speed sensor wiring to IGC 7 Flashes Rollout Switch Lockout Gas valve and igniter Off Indoor fan and inducer On Power reset Rollout switch has opened Check gas...

Page 63: ...63 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 64: ...g The electronic con trol uses suction pressure transducers to measure the suction pressure of the refrigerant circuits The pressure voltage char acteristics of these transducers are in shown in Table...

Page 65: ...87 2 202 7 869 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...

Page 66: ...000 87 1 319 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 1...

Page 67: ...ction NOTE The Economizer Control Board ECB has a 4 position DIP switch that is factory set to ON towards the center of the board Do not change this setting Integrated Gas Control IGC Board The IGC is...

Page 68: ...68 Fig 14 Low Voltage Control Schematic 48PG20 28 Units without Humidi MiZer System a48 7627...

Page 69: ...69 Fig 15 Low Voltage Control Schematic 48PG20 28 Units with Humidi MiZer System a48 8227...

Page 70: ...70 Fig 16 Low Voltage Control Schematic 50PG20 28 Units without Humidi MiZer System a48 7778...

Page 71: ...71 Fig 17 Low Voltage Control Schematic 50PG20 28 Units with Humidi MiZer System a50 8101...

Page 72: ...72 Fig 18 Power Schematic Units without Humidi MiZer System a48 7628...

Page 73: ...73 Fig 19 Power Schematic Units with Humidi MiZer System a48 8228...

Page 74: ...74 Fig 20 Component Arrangement Units without Humidi MiZer System a48 8229...

Page 75: ...75 Fig 21 Component Arrangement Units with Humidi MiZer System a48 8230...

Page 76: ...put J8 18 20 SSP B Suction pressure circuit B compressor B suction analog input J8 21 23 SSP C Suction pressure circuit C compressor C suction analog input J8 24 26 FIL S Filter status switch indoor f...

Page 77: ...r return switch input J4 4 3 IAQ Indoor air quality sensor space or return 4 20 mA J5 2 3 OAQ or SP RH Outdoor air quality sensor or Space humidity sensor economizer space 4 20 mA J5 4 3 OUTPUTS PE 1...

Page 78: ...sensor gas section switch input W Heat stage 1 MBB 24 VAC J2 2 RS Rollout switch gas section switch input J2 5 6 LS Limit switch gas section switch input J2 7 8 CS Centrifugal switch not used switch i...

Page 79: ...l control Economizer actuator analog control economizer communication 2 10 VDC output J10 1 2 R 24 VAC power 24 VAC output J11 11 14 Y1 Y1 Thermostat Y1 1st stage cool space 24 VAC input J11 10 Y2 Y2...

Page 80: ...r the shields must be connected to grounds at the lightning sup pressor in each building where the cable enters or exits the building one point per building only To connect the unit to the network 1 T...

Page 81: ...DITIONAL TERMINALS HEATING COOLING UNITS BUILDING SUPERVISOR ROOFTOP UNIT CL ROOFTOP UNIT CL ROOFTOP UNIT CL ROOFTOP UNIT CL CCN BUS CL COMFORT CONTROLLER COND COMPRESSOR SUBCOOLER HX SUBCOOLER TXV MA...

Page 82: ...or OAQ use by setting Configuration AIR Q OA CF to a value of 1 or 2 See the Indoor Air Quality section for more information SMOKE DETECTORS The smoke detectors are field installed accessories These d...

Page 83: ...T RED WHT GND BLK CCN COM SENSOR WIRING JUMPER TERMINALS AS SHOWN Fig 31 T 55 Space Temperature Sensor Wiring P N 33ZCT55SPT Fig 32 T 56 Space Temperature Sensor Wiring P N 33ZCT56SPT VAC 24 VAC BLACK...

Page 84: ...K TB2 T55 1 2 2 T 55 SENSOR 1 T 55 SENSOR 2 T 55 SENSOR 3 T 56 SENSOR 4 RED BLK RED BLK RED BLK RED BLK TO MAIN BASE BOARD RED BLK TB2 T55 1 2 TO MAIN BASE BOARD 3 TB2 T55 WHT SPACE TEMPERATURE AVERAG...

Page 85: ...cleaners is strongly discouraged since coil and unit durability could be affected Totaline Environmentally Sound Coil Cleaner Application Equipment 21 2 gallon garden sprayer water rinse with low vel...

Page 86: ...section on page 91 for burner removal sequence If cleaning is re quired clean tubes with a wire brush Use caution with ceramic heat exchanger baffles When in stalling retaining clip be sure the cente...

Page 87: ...omponents 6 To replace fan deck to operating position slide fan deck back into the unit Secure with the three no 10 screws removed in Step 3 7 Re attach electrical plugs and wires 8 Close fan section...

Page 88: ...per motor Evacuation Proper evacuation of the system will re move noncondensables and ensure a tight dry system before charging Evacuate from both high and low side ports Never use the system compress...

Page 89: ...rt see Fig 42 45 add or remove refrigerant until conditions of the chart are met An accurate pressure gage and temperature sensing device are required Charging is accomplished by ensuring the proper a...

Page 90: ...components that have been used with other refrigerants Puron refrigerant as with other HFCs is only compatible with POE oils Recovery cylinder service pressure rating must be 400 psig Puron systems sh...

Page 91: ...above Table 58 Altitude Compensation 48PG20 28 NATURAL GAS As the height above sea level increases there is less oxygen per cubic foot of air Therefore heat input rate should be reduced at higher alt...

Page 92: ...ass connections or increase the size of the breaker to correct trouble Determine the cause and correct it before resetting the breaker CONDENSER FAN MOTOR PROTECTION Each condenser fan motor is intern...

Page 93: ...tarts xxxxxx ST_B1 Forcible C1 Compressor C1 Starts xxxxxx ST_C1 Forcible CCH Crankcase Heat Starts xxxxxx ST_CCH Forcible IDF Indoor Fan Starts xxxxxx ST_IDF Forcible OFC 1 Outdoor Fan 1 Starts xxxxx...

Page 94: ...w IAQIN IAQ IAQ Level Sensor xxxx ppm IAQ OAT Outdoor Air Temperature xxx x dF OA_TEMP ENTH Outdoor Enthalpy Switch High Low ENTHALPY OAQ OAQ Level Sensor xxxx ppm OAQ PE 1 Power Exhaust 1 Relay On Of...

Page 95: ...Test On Off Off S2_RH2_A Forcible RH2 B Reheat2 B Test On Off Off S2_RH2_B Forcible RH2 C Reheat2 C Test On Off Off S2_RH2_C Forcible CRC Cool Reheat1 Valve Test On Off Off S_CRC Forcible RHV A Rehea...

Page 96: ...2 Thermostat W2 Input On Off W2 Forcible G Thermostat G Input On Off G Forcible GEN I General Inputs FIL S Filter Status Switch Dirty Clean FILTSTAT FAN S Fan Status Switch On Off FAN_STAT FDWN Fire S...

Page 97: ...n 2 Normal Closed 0 no Humidi MiZer FIOP 1 Humidi MiZer FIOP HUMSTCFG 35 38 40 47 82 TCS C Temp Cmp Strt Cool Factr 0 to 60 mins 0 TCSTCOOL 40 51 TCS H Temp Cmp Strt Heat Factr 0 to 60 mins 0 TCSTHEAT...

Page 98: ...Suction OK Temperature 10 to 50 dF 18 SSTOK SST 1 Low Suction Level 1 10 to 50 dF 20 SSTLEV1 55 SST 2 Low Suction Level 2 5 to 50 dF 15 SSTLEV2 55 SST 3 Low Suction Level 3 0 to 50 dF 10 SSTLEV3 55 OF...

Page 99: ...off Delay Elect Heat 10 to 600 sec 30 ELEC_FOD 44 FOD G Fan off Delay Gas Heat 45 to 600 sec 45 GAS_FOD 43 HT LO Heating Lockout Temp 40 to 125 dF 75 OATLHEAT 42 SAT H SAT Heat Mode Sensing Enable Di...

Page 100: ...00 100 RH_20MA 47 ALM O Alarm Relay Configuration ALM_CFG 52 A SPC SPT SPRH Sensor Failure Yes No Yes SPACE_AL A SRT SAT RAT Sensor Failure Yes No Yes SATRATAL A OAT OAT Thermistor Failure Yes No Yes...

Page 101: ...UE x Tuesday in Period Yes No No WED x Wednesday in Period Yes No No THU x Thursday in Period Yes No No FRI x Friday in Period Yes No No SAT x Saturday in Period Yes No No SUN x Sunday in Period Yes N...

Page 102: ...er Level xx x dF SATMIN_L SA TR Supply Air d dt F min xxxx x SAT_TREND SA DR SAT Delta Reference Temp xxx x dF SAT_REF SPT Space Temperature SPT Space Temperature xxx x dF SPACE_T Forcible DMD C Cooli...

Page 103: ...rcible Return Air Temp Calib 30 to 130 dF RAT_CAL Forcible Return Air Temp Trim 30 to 30 F RAT_OFF Forcible OCCDEFM CCN only Occupancy Supervisory OCCDEFM Current Mode 1 Occup 0 1 MODE Current Occup P...

Page 104: ...ON HIGH Subcooling Subcooling Min Position NO ON OFF LOW ON OFF Min Position NO OFF ON LOW ON ON Min Position alarm T411 Y2 without Y1 NO ON ON LOW ON ON Min Position YES OFF OFF LOW OFF OFF Min Posit...

Page 105: ......

Page 106: ...ue or change at any time specifications or designs without notice and without incurring obligations Catalog No 04 53480028 01 Printed in U S A Form 48 50PG 5T Pg 106 6 06 Replaces 48 50PG 2T Copyright...

Page 107: ...1 T CTL Thermostat Control Type 0 Adaptive 1 1 Stage Y1 2 2 Stage Y1 0 OC FN Fan On When Occupied Yes No Yes IDF F Shut Down on IDF Failure Yes No Yes EC EN Economizer Installed Yes No No no FIOP Yes...

Page 108: ...Fans 0 to 7 No Humidi MiZer FIOP 4 Humidi MiZer FIOP 1 B2 FN B Circuit Level 2 Fans 0 to 7 No Humidi MiZer FIOP 6 20 2 24 28 Humidi MiZer FIOP 3 20 2 24 28 B3 FN B Circuit Level 3 Fans 0 to 7 No Humid...

Page 109: ...ctric 0 50 series with no electric heat 1 48 series 2 50 series with electric heat N HTR Number of Heat Stages 1 to 2 1 48 series 1 phase 50 series 15kW 2 48 series 3 phase 50 series 15kW MRT H Heat M...

Page 110: ...ormally Open 2 DCV Normally Closed 3 Override Normally Open 4 Override Normally Closed 0 II FN IAQ Switch Fan Config 0 Never 1 Only While Occupied 2 Always 0 AQ MN Econo Min IAQ Position 0 to 100 10 E...

Page 111: ...lement Number 1 to 239 1 CCN B CCN Bus Number 0 to 239 0 BAUD CCN Baud Rate 1 2400 2 4800 3 9600 4 19200 5 38400 3 BROD CCN Broadcast Configuration B TIM CCN Time Date Broadcast Yes No No B OAT CCN OA...

Page 112: ...UTDOOR AIR INLET SCREENS ARE IN PLACE VERIFY THAT UNIT IS LEVEL CHECK FAN WHEEL AND PROPELLER FOR LOCATION IN HOUSING ORIFICE AND VERIFY SETSCREW IS TIGHT VERIFY THAT FAN SHEAVES ARE ALIGNED AND BELTS...

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