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Table 31 — Thermistor Temperature (F) vs Resistance/Voltage Drop Values for 

OAT, SAT, and SCT Thermistors (5K at 25 C Resistors)

TEMP

(F)

VOLTAGE

DROP

(V)

RESISTANCE

(Ohms)

–25

3.699

98,010

–24

3.689

94,707

–23

3.679

91,522

–22

3.668

88,449

–21

3.658

85,486

–20

3.647

82,627

–19

3.636

79,871

–18

3.624

77,212

–17

3.613

74,648

–16

3.601

72,175

–15

3.588

69,790

–14

3.576

67,490

–13

3.563

65,272

–12

3.550

63,133

–11

3.536

61,070

–10

3.523

59,081

–9

3.509

57,162

–8

3.494

55,311

–7

3.480

53,526

–6

3.465

51,804

–5

3.450

50,143

–4

3.434

48,541

–3

3.418

46,996

–2

3.402

45,505

–1

3.386

44,066

0

3.369

42,679

1

3.352

41,339

2

3.335

40,047

3

3.317

38,800

4

3.299

37,596

5

3.281

36,435

6

3.262

35,313

7

3.243

34,231

8

3.224

33,185

9

3.205

32,176

10

3.185

31,202

11

3.165

30,260

12

3.145

29,351

13

3.124

28,473

14

3.103

27,624

15

3.082

26,804

16

3.060

26,011

17

3.038

25,245

18

3.016

24,505

19

2.994

23,789

20

2.972

23,096

21

2.949

22,427

22

2.926

21,779

23

2.903

21,153

24

2.879

20,547

25

2.856

19,960

26

2.832

19,393

27

2.808

18,843

28

2.784

18,311

29

2.759

17,796

30

2.735

17,297

31

2.710

16,814

32

2.685

16,346

33

2.660

15,892

34

2.634

15,453

35

2.609

15,027

36

2.583

14,614

37

2.558

14,214

38

2.532

13,826

39

2.506

13,449

40

2.480

13,084

41

2.454

12,730

42

2.428

12,387

43

2.402

12,053

44

2.376

11,730

45

2.349

11,416

46

2.323

11,112

47

2.296

10,816

48

2.270

10,529

49

2.244

10,250

50

2.217

9,979

51

2.191

9,717

52

2.165

9,461

53

2.138

9,213

54

2.112

8,973

55

2.086

8,739

56

2.060

8,511

57

2.034

8,291

58

2.008

8,076

TEMP

(F)

VOLTAGE

DROP

(V)

RESISTANCE

(Ohms)

59

1.982

7,686

60

1.956

7,665

61

1.930

7,468

62

1.905

7,277

63

1.879

7,091

64

1.854

6,911

65

1.829

6,735

66

1.804

6,564

67

1.779

6,399

68

1.754

6,238

69

1.729

6,081

70

1.705

5,929

71

1.681

5,781

72

1.656

5,637

73

1.632

5,497

74

1.609

5,361

75

1.585

5,229

76

1.562

5,101

77

1.538

4,976

78

1.516

4,855

79

1.493

4,737

80

1.470

4,622

81

1.448

4,511

82

1.426

4,403

83

1.404

4,298

84

1.382

4,196

85

1.361

4,096

86

1.340

4,000

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

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

0.858

2,192

114

0.843

2,147

115

0.829

2,103

116

0.815

2,060

117

0.801

2,018

118

0.787

1,977

119

0.774

1,937

120

0.761

1,898

121

0.748

1,860

122

0.735

1,822

123

0.723

1,786

124

0.710

1,750

125

0.698

1,715

126

0.686

1,680

127

0.674

1,647

128

0.663

1,614

129

0.651

1,582

130

0.640

1,550

131

0.629

1,519

132

0.618

1,489

133

0.608

1,459

134

0.597

1,430

135

0.587

1,401

136

0.577

1,373

137

0.567

1,345

138

0.557

1,318

139

0.548

1,291

140

0.538

1,265

141

0.529

1,240

142

0.520

1,214

TEMP

(F)

VOLTAGE

DROP

(V)

RESISTANCE

(Ohms)

143

0.511

1,190

144

0.502

1,165

145

0.494

1,141

146

0.485

1,118

147

0.477

1,095

148

0.469

1,072

149

0.461

1,050

150

0.453

1,029

151

0.445

1,007

152

0.438

986

153

0.430

965

154

0.423

945

155

0.416

925

156

0.408

906

157

0.402

887

158

0.395

868

159

0.388

850

160

0.381

832

161

0.375

815

162

0.369

798

163

0.362

782

164

0.356

765

165

0.350

750

166

0.344

734

167

0.339

719

168

0.333

705

169

0.327

690

170

0.322

677

171

0.317

663

172

0.311

650

173

0.306

638

174

0.301

626

175

0.296

614

176

0.291

602

177

0.286

591

178

0.282

581

179

0.277

570

180

0.272

561

181

0.268

551

182

0.264

542

183

0.259

533

184

0.255

524

185

0.251

516

186

0.247

508

187

0.243

501

188

0.239

494

189

0.235

487

190

0.231

480

191

0.228

473

192

0.224

467

193

0.220

461

194

0.217

456

195

0.213

450

196

0.210

445

197

0.206

439

198

0.203

434

199

0.200

429

200

0.197

424

201

0.194

419

202

0.191

415

203

0.188

410

204

0.185

405

205

0.182

401

206

0.179

396

207

0.176

391

208

0.173

386

209

0.171

382

210

0.168

377

211

0.165

372

212

0.163

367

213

0.160

361

214

0.158

356

215

0.155

350

216

0.153

344

217

0.151

338

218

0.148

332

219

0.146

325

220

0.144

318

221

0.142

311

222

0.140

304

223

0.138

297

224

0.135

289

225

0.133

282

Summary of Contents for 48HG016

Page 1: ...ONS Installation and servicing of air conditioning equipment can be hazardous due to system pressure and electrical compo nents Only trained and qualified service personnel should install repair or se...

Page 2: ...with drain wire and is field supplied and installed See Table 6 for wiring infor mation The system elements are connected to the communica tion bus in a daisy chain arrangement The positive pin of eac...

Page 3: ...3 Fig 1 Low Voltage Control Schematic 48HG Units...

Page 4: ...4 Fig 2 Low Voltage Control Schematic 50HG Units...

Page 5: ...5 Fig 3 Typical Power Schematic...

Page 6: ...m Temp Device with Set Point Adjustment Terminal Block Terminal Unmarked Terminal Marked Splice Factory Wiring Field Wiring To indicate common potential only not to represent wiring To indicate FIOP o...

Page 7: ...11 12 MBB Saturated Condensing Temperature for Cir B SCT_B Circuit B condenser hairpin SCT_C T5 J8 13 14 MBB Saturated Condensing Temperature for Cir C SCT_C Circuit C condenser hairpin Transducers SS...

Page 8: ...J8 15 16 MBB TB3 11 12 Part No HK06WC028 Y1 J7 10 MBB TB4 2 Thermostat Y1 1st Stage Cooling Y2 J7 8 MBB TB4 3 Thermostat Y2 2nd Stage Cooling W1 J7 6 MBB TB4 4 Thermostat W1 1st Stage Heating W2 J7 4...

Page 9: ...Fan Motor 48HG only Fan Power J10 3 MBB Allows indoor fan to operate OFC1 J10 19 MBB Controls outdoor fan motor 1 OFC2 J10 16 MBB Controls outdoor fan motor 3 and 6 also 2 and 5 on size 028 units OFC3...

Page 10: ...Mounting 2 3 4 5 6 1 SW1 SEN BLK GND RED SPT RED WHT GND BLK CCN COM SENSOR WIRING 2 3 4 5 6 1 SW1 SEN SET Cool Warm WHT T56 BLK GND RED SPT RED WHT GND BLK CCN COM SENSOR WIRING JUMPER TERMINALS AS...

Page 11: ...eferred configuration CONTROLS AND FUNCTIONS Marquee Display Usage See Fig 7 and Tables 7 21 The display module provides the user interface to the ComfortLink control system The display has up and dow...

Page 12: ...ode can used to test the system outputs that are independent and can operate in all modes fan only cooling and heating These outputs are ECON E PWR PE 1 PE 2 and ALM When an economizer output ECON oth...

Page 13: ...un Hours HTR 2 XXXX Heat Stage 2 Run Hours PE 1 XXXX Power Exhaust1 Run Hours PE 2 XXXX Power Exhaust2 Run Hours E PWR XXXX Economizer Pwr Run Hours ALM XXXX Alarm Output Run Hours CYCS Component Cycl...

Page 14: ...ON OFF Compressor B1 Test C1 ON OFF Compressor C1 Test HEAT Test Heating HTR 1 ON OFF Heat Stage 1 Test HTR 2 ON OFF Heat Stage 2 Test SUBMODE KEYPAD ENTRY ITEM DISPLAY ITEM EXPANSION COMMENT UNIT Uni...

Page 15: ...ng Set points OCSP XX Occupied Cool Set point Default 78 UCSP XX Unoccupied Cool Set point Default 85 HEAT Heating Set points OHSP XX Occupied Heat Set point Default 68 UHSP XX Unoccupied Heat Set poi...

Page 16: ...lity CS IN Current Sensor Inputs CS A1 ON OFF A1 Current Sensor CS B1 ON OFF B1 Current Sensor CS C1 ON OFF C1 Current Sensor SUBMODE KEYPAD ENTRY ITEM DISPLAY ITEM EXPANSION FANS Fan Outputs IDF ON O...

Page 17: ...h 1 Normal Open 2 Normal Close ECB YES NO ECB Installed Default YES SAT T XXX SAT Settling Time Secs Default 240 sec COOL Cooling Configuration N CMP X Number of Compressors Default 3 016 024 2 014 02...

Page 18: ...Default Yes EN SW X Enthalpy Switch Input Default 0 0 No Switch 1 Normal Open 2 Normal Close PE EN YES NO Power Exhaust Control Default NO PE1 P XXX PE Stage1 Econo Position Default 25 PE2 P XXX PE St...

Page 19: ...t YES A SSP YES NO SSP Transducer Failure Default YES A SCT YES NO SCT Thermistor Failure Default YES A FAN YES NO Indoor Fan Failure Default YES A FIL YES NO Plugged Filter Default YES A TST YES NO T...

Page 20: ...cal Schedule 65 99 Global Schedule OVR E OVR E YES NO SPT Override Enabled Default YES OTL OTL X Override Time Limit Default 4 SCH L Local Occupancy Schedule PER 1 Occupancy Period 1 OCC 1 XX XX Perio...

Page 21: ...Saturday In Period Default No SUN 3 YES NO Sunday In Period Default No HOL 3 YES NO Holiday In Period Default No PER 4 Occupancy Period 4 OCC 4 XX XX Period Occupied Time Range 00 00 to 23 59 Default...

Page 22: ...Range 00 00 to 23 59 Default 00 00 UNC 7 XX XX Period Unoccupied Time Range 00 00 to 23 59 Default 00 00 MON 7 YES NO Monday In Period Default No TUE 7 YES NO Tuesday In Period Default No WED 7 YES NO...

Page 23: ...4 X Holiday Start Day Default 0 LEN 4 XX Holiday Duration Days Default 0 HOL 5 Holiday 5 MTH 5 XX Holiday Start Month Default 0 DAY 5 X Holiday Start Day Default 0 LEN 5 XX Holiday Duration Days Defa...

Page 24: ...O Scrolling stops YES Select YES YES Changed 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 Changed accepted TUE 1...

Page 25: ...If a compressor shuts down because of a safety the software will set the compressor request A1 B1 or C1 to OFF forcing the user to reselect the compressor to restart the compressor in Service mode Al...

Page 26: ...Centurion unit can only store one local schedule and therefore changing this number only changes the title of the schedule table c SCH N 65 99 Follow the global programmed schedule If the Centurion u...

Page 27: ...ues are 50 25 and 0 for circuits A B and C respectively The maximum value will remain in effect until the compressor in trouble turns off The effective maximum economizer position must always be highe...

Page 28: ...opposite order In all cases the minimum on time of 3 minutes MRT C and the minimum off time of 5 minutes MOT C must be honored Therefore if the staging order is BtoT and Circuit A was shut down two m...

Page 29: ...r description of IGC operation NOTE The jumper wire in the installer s packer must be con nected between R and W1 when using a T55 T56 or T58 device See Fig 1 and 2 During Space Sensor control two met...

Page 30: ...the last stage of compressor might cycle rapidly slowed only by its minimum on and off time requirements For size 016 to 024 units the algorithm must decide how to map a two stage thermostat to three...

Page 31: ...it to shut down for 15 min utes This feature reduces the likelihood of false alarms causing a properly working system to be shutdown incorrectly If three strikes occur before the circuit has an opport...

Page 32: ...causes are 1 Welded contactor 2 Frozen compressor relay on MBB To check out alerts 51 55 and 59 1 Place the unit in Service Test Mode All compressors should be Off 2 Verify that there is not 24V at t...

Page 33: ...e with Economizer Actuator This alert occurs when the MBB cannot communicate with the Belimo Actuator This is usually caused by a wiring problem Investigate using the Low Voltage Schematic Alarm Code...

Page 34: ...W1 is turned On Alert Code 413 Y and W Simultaneously This alert occurs in Thermostat Mode when Y1 or Y2 is energized simul taneously with W1 or W2 Verify thermostat and thermostat wiring The software...

Page 35: ...ards loose or broken fan belt plugged filter drier faulty transducer exces sively cold return air or stuck open economizer when the ambient temperature is low T140 Circuit C Loss of Charge Shutdown Ci...

Page 36: ...er coil dirty or restricted Clean coil or remove restriction Excessive head pressures Loose condenser thermistors Tighten thermistors Dirty condenser coil Clean coil Refrigerant overcharge Recover exc...

Page 37: ...r Check economizer position and configuration Adjust mini mum position using ComfortLink Scrolling Marquee Limit switch cycles main burners Check rotation of blower thermostat heat anticipator set tin...

Page 38: ...38 Fig 13 IGC Control Heating and Cooling LEGEND NOTE Thermostat Fan Switch in the AUTO position IDM Induced Draft Motor IGC Integrated Gas Unit Controller...

Page 39: ...ng the resistance with unit shut down and thermistor dis connected from J8 Compare the values determined with the value read by the control in the Temperatures mode using the Scrolling Marquee display...

Page 40: ...96 86 1 340 4 000 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...

Page 41: ...710 23 1 623 5 461 24 1 580 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...

Page 42: ...2 231 8 056 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 86...

Page 43: ...580 109 075 21 4 557 102 868 20 4 533 97 060 19 4 508 91 588 18 4 482 86 463 17 4 455 81 662 16 4 426 77 162 15 4 397 72 940 14 4 367 68 957 13 4 335 65 219 12 4 303 61 711 11 4 269 58 415 10 4 235 55...

Page 44: ...Delay Gas Heat 45 600 45 sec GAS_FOD SAT Cool Demand Level 0 5 10 0 1 0 F SAT_POS SAT Cool Demand Level 10 0 0 5 1 0 F SAT_NEG SAT Settling Time 10 900 240 sec SAT_SET Minimum SAT Upper Level 35 0 65...

Page 45: ...tch 0 Not Installed 1 Normally Open 2 Normally Closed 0 No FIOP 1 FIOP FILSTCFG Fire Shutdown Switch 0 Not Installed 1 Normally Open 2 Normally Closed 0 No FIOP 2 FIOP SHTDNCFG Remote Occupancy Switch...

Page 46: ...XB Middle Stage Max Econmzr 0 100 25 ECONMAXM Top Stage Max Econmzr 0 100 0 ECONMAXT Economizer PID Deadband 0 25 3 ECONBAND Economizer PID kP 0 0 99 9 2 5 ECONO_P Economizer PID kI 0 0 99 9 12 ECONO_...

Page 47: ...nnn TIMGD_H2 N CIRCUIT A Saturated Suct Temp A snnn n dF SST_A N Saturated Suct Press A nnn n PSIG SSP_A N Saturated Cond Temp A snnn n dF SCT_A N Saturated Cond Press A 0 0 PSIG SCP_A N Compressor A1...

Page 48: ...Input On Off G Y DESCRIPTION STATUS UNITS POINT FORCIBLE Economizer Power On Off ECON_PWR N Economizer Commanded Pos nn ECONOCMD N Economizer Position nn ECONOPOS N Minimum Position in Effect Nnn MIN_...

Page 49: ...Lag Factor n n COOL_LAG Y SPT Cool Demand Level n n F DEM_POS Y SPT Cool Demand Level sn n F DEM_NEG Y SAT Cool Demand Level n n F SAT_POS Y SAT Cool Demand Level sn n F SAT_NEG Y MET2Add SAT Trend Le...

Page 50: ...1 Compressor B1 Cycles nnnnnn CY_B1 Compressor C1 Cycles nnnnnn CY_C1 Indoor Fan Run Hours nnnnn nn hours HR_IDF Indoor Fan Cycles nnnnnn CY_IDF OD Fan Cont 1 Run Hours nnnnn nn hours HR_OFC_1 OD Fan...

Page 51: ...rent Mode 1 Occup 0 1 MODE Current Occup Period 0 8 PER NO Timed Override in Effect Yes No OVERLAST Time Override Duration 0 4 hours OVR_HRS Current Occupied Time hh mm STRTTIME Current Unoccupied Tim...

Page 52: ...Txxx ALARM03C Active Alarm 4 Axxx or Txxx ALARM04C Active Alarm 5 Axxx or Txxx ALARM05C Active Alarm 6 Axxx or Txxx ALARM06C Active Alarm 7 Axxx or Txxx ALARM07C Active Alarm 8 Axxx or Txxx ALARM08C A...

Page 53: ......

Page 54: ...ange at any time specifications or designs without notice and without incurring obligations PC 111 Catalog No 534 80090 Printed in U S A Form 48 50HG 2T Pg 54 202 10 01 Replaces 48 50HG 1T Book 1 1 4...

Page 55: ...Stage Y1 OC FN ________ Y N S DLY ________ 30 IDF F ________ N Y FN SW ________ No Switch Normal Open Normal Close FL SW ________ No Switch Normal Open Normal Close FS SW ________ No Switch Normal Op...

Page 56: ...100 PPM AQD H ________ 700 PPM I 4M ________ 0 PPM I 20M ________ 2000 PPM O 4M ________ 0 PPM O 20M ________ 2000 PPM OAQ L ________ 600 PPM CCN CCN A ________ 1 CCN B ________ 0 BAUD ________ 3 9600...

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