Lennox XP21-024 Installation Instructions Manual Download Page 42 | Manualshive

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506601−01

Table 12. High Discharge Sensor (RT28) Temperature / Resistance Range

Degrees

Fahrenheit

Resistance

Degrees

Fahrenheit

Resistance

Degrees

Fahrenheit

Resistance

Degrees

Fahrenheit

Resistance

303.1

183

186.1

1052

136.8

2656

94.5

6613

298.1

195

185.0

1072

136.0

2698

93.6

6739

293.4

207

183.9

1093

135.2

2740

92.8

6869

289.0

220

182.8

1114

134.5

2783

92.0

7002

284.8

232

181.8

1135

133.7

2827

91.2

7139

280.9

245

180.7

1157

132.9

2872

90.3

7281

277.1

258

179.6

1179

132.2

2917

89.5

7426

273.6

270

178.6

1201

131.4

2963

88.6

7575

270.2

283

177.6

1223

130.6

3010

87.8

7729

267.0

297

176.6

1245

129.9

3057

86.9

7888

263.9

310

175.5

1268

129.1

3105

86.0

8051

260.9

323

174.6

1291

128.4

3154

85.2

8220

258.1

336

173.6

1315

127.6

3204

84.3

8394

255.3

350

172.6

1338

126.8

3255

83.4

8574

252.7

364

171.6

1362

126.1

3307

82.5

8759

250.1

378

170.6

1386

125.3

3359

81.6

8951

247.7

391

169.7

1411

124.6

3413

80.7

9149

245.3

405

168.7

1435

123.8

3467

79.8

9354

243.0

420

167.8

1460

123.1

3523

78.8

9566

240.8

434

166.9

1486

122.3

3579

77.9

9786

238.6

448

165.9

1511

121.6

3637

76.9

10013

236.5

463

165.0

1537

120.8

3695

76.0

10250

234.4

478

164.1

1563

120.1

3755

75.0

10495

232.4

492

163.2

1590

119.3

3816

74.1

10749

230.5

507

162.3

1617

118.5

3877

73.1

11014

228.6

523

161.4

1644

117.8

3940

72.1

11289

226.7

538

160.5

1672

117.0

4005

71.1

11575

224.9

553

159.7

1699

116.3

4070

70.0

11873

223.2

569

158.8

1728

115.5

4137

69.0

12184

221.5

584

157.9

1756

114.8

4205

68.0

12509

219.8

600

157.1

1785

114.0

4274

66.9

12848

218.1

616

156.2

1815

113.2

4345

65.8

13202

216.5

632

155.3

1845

112.5

4418

64.7

13573

214.9

649

154.5

1875

111.7

4491

63.6

13961

213.4

665

153.6

1905

111.0

4567

62.5

14368

211.9

682

152.8

1936

110.2

4644

61.3

14796

210.4

698

152.0

1968

109.4

4722

60.2

15246

208.9

715

151.1

1999

108.7

4802

59.0

15719

207.5

732

150.3

2032

107.9

4884

57.8

16218

206.0

750

149.5

2064

107.1

4968

56.6

16744

204.6

767

148.7

2098

106.4

5054

55.3

17301

203.3

785

147.9

2131

105.6

5141

54.0

17891

201.9

803

147.1

2165

104.8

5231

52.7

18516

200.6

821

146.2

2200

104.0

5323

51.4

19180

199.3

839

145.4

2235

103.3

5416

50.0

19887

198.0

857

144.6

2270

102.5

5512

48.6

20641

196.8

876

143.8

2306

101.7

5610

47.2

21448

195.5

894

143.0

2343

100.9

5711

45.7

22311

194.3

913

142.3

2380

100.1

5814

193.1

932

141.5

2418

99.3

5920

191.9

952

140.7

2456

98.5

6028

190.7

971

139.9

2495

97.7

6139

189.5

991

139.1

2534

96.9

6253

188.4

1011

138.3

2574

96.1

6370

187.2

1031

137.6

2615

95.3

6489

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Summary of Contents for XP21-024

Page 1: ...See the icomfort Touch thermostat Quick Start Guide for communicating and partial communicating field wiring connections INSTALLATION INSTRUCTIONS Dave Lennox Signature Collection XP21 System HEAT PUM...

Page 2: ...INE INLET UNIT SUPPORT FEET 35 1 2 902 18 1 2 470 8 203 4 1 2 114 ELECTRICAL INLET HIGH VOLTAGE 37 940 024 AND 036 SOLAR MODULE WIRING ELECTRICAL INLET CONTROL WIRING LOW VOLTAGE 47 1194 048 AND 060 M...

Page 3: ...H PRESSURE SWITCH S4 LIQUID VALVE AND GAUGE PORT TRUE SUCTION LINE PORT LOW PRESSURE SWITCH S87 CRANKCASE HEATER THERMOSTAT S40 CRANKCASE HEATER HR1 BELLY BAND COMPRESSOR MUFFLER DISCHARGE LINE CHECK...

Page 4: ...r liquid and suction lines Using Manifold Gauge Set When checking the system charge only use a manifold gauge set that features low loss anti blow back fittings IMPORTANT To prevent stripping of the v...

Page 5: ...12 1 12 TURN To Access Service Port A service port cap protects the service port core from contamination and serves as the primary leak seal 1 Remove service port cap with an appropriately sized wren...

Page 6: ...o meets a certain value or when the suction pressure is as high as 20 psig Compressor suction pressures should never be allowed to go into a vacuum Prolonged operation at low suction pressures will re...

Page 7: ...he unit directly outside a window Glass has a very high level of sound transmission For proper placement of unit in relation to a window see the provided illustration in figure 5 detail A PLACING UNIT...

Page 8: ...ance of two 2 degrees or two inches per five feet 50 mm per 1 5 m away from building structure MOUNTING SLAB BUILDING STRUCTURE GROUND LEVEL Outside Unit Placement Slab Mounting at Ground Level SAME F...

Page 9: ...ET AIR INLET AIR INLET AIR Figure 6 Rooftop Application and Wind Barrier NOTICE Roof Damage This system contains both refrigerant and oil Some rubber roofing material may absorbed oil and cause the ru...

Page 10: ...rmly throughout this procedure Rotate bottom corner of panel away from hinged corner post until lower three tabs clear the slots as illustrated in detail B 3 Move panel down until lip of upper tab cle...

Page 11: ...0 3 8 10 1 1 8 29 Field Fabricated NOTE Some applications may required a field provided 7 8 to 1 1 8 adapter NOTE When installing refrigerant lines longer than 50 feet see the Lennox Refrigerant Pipin...

Page 12: ...RAFTER AT 8 FEET 2 43 METERS INTERVALS THEN STRAP THE LIQUID LINE TO THE VAPOR LINE FLOOR JOIST OR ROOF RAFTER REFRIGERANT LINE SET INSTALLING HORIZONTAL RUNS NOTE Similar installation practices shou...

Page 13: ...erform operations only in well ventilated areas Wear gloves and protective goggles or face shield to protect against burns Wash hands with soap and water after handling brazing alloys and flux IMPORTA...

Page 14: ...it point NITROGEN HIGH LOW B A C PIPING PANEL REMOVAL AND PREPARING LINE SET CAP AND CORE REMOVAL Remove piping panel for easier access to service valves Cut ends of the refrigerant lines square free...

Page 15: ...on previous page and below for manifold gauge setup 5 SUCTION VAPOR LINE WHEN BRAZING LINE SET TO SERVICE VALVES POINT FLAME AWAY FROM SERVICE VALVE WARNING 1 FIRE PERSONAL INJURY OR PROPERTY DAMAGE w...

Page 16: ...tributor tubes during this process G Remove and discard check expansion valve and the two Teflon rings H Use a field provided fitting to temporary reconnect the liquid line to the indoor unit s liquid...

Page 17: ...ected the liquid line to the indoor unit s distributor assembly B Install one of the provided Teflon rings around the stubbed end of the check expansion valve and lightly lubricate the connector threa...

Page 18: ...der of HFC 410A refrigerant to the center port of the manifold gauge set Open the valve on the HFC 410A cylinder vapor only B Open the high pressure side of the manifold to allow HFC 410A into the lin...

Page 19: ...t and indoor unit until the absolute pressure does not rise above 500 microns 29 9 inches of mercury within a 20 minute period after shutting off the vacuum pump and closing the manifold gauge valves...

Page 20: ...o the unit nameplate for minimum circuit ampacity and maximum fuse or circuit breaker HACR per NEC Install power wiring and properly sized disconnect switch NOTE Units are approved for use only with c...

Page 21: ...control wire connections to heat pump control A175 B ROUTE CONTROL WIRES COMMUNICATING Maximum length of wiring 18 gauge for all connections on the RSBus is limited to 1500 feet 457 meters Color coded...

Page 22: ...Page 22 506601 01 Figure 15 Typical XP21 Wiring...

Page 23: ...ES RS BUS DATA COMMUNICATION IS ACTIVE COMMUNICATION MODE ONLY Table 3 on page 24 provides additional information concerning jumpers links and connections for the heat pump control E37 E47 DS12 E48 E3...

Page 24: ...oor coil temperature sensor supply COIL 2 Outdoor coil temperature sensor return Range is 40 F to 140 F Sensor is clipped on a 5 16 copper return bend E33 Field Test This jumper allows service personn...

Page 25: ...actory with metal jumpers installed across W1 W2 and W3 For two stage electric heat remove factory installed metal jumper between W1 to W2 Then connect thermostat wire between the air handler control...

Page 26: ...ations This will slow the outdoor unit s fan speed to a specific RPM A wire must be installed between the DS terminals on the furnace and outdoor unit controls See table 15 for fan speed based on unit...

Page 27: ...ange listed on the unit s nameplate If not do not start the equipment until you have consulted with the power company and the voltage condition has been corrected 6 Set the thermostat for a cooling de...

Page 28: ...14 13 74 21 21 21 20 19 19 18 17 16 16 15 14 13 12 72 20 20 19 18 17 17 16 15 15 14 13 12 11 10 70 19 19 18 18 17 17 16 15 15 14 13 12 11 10 57 58 59 60 61 62 63 64 65 66 67 68 69 70 TEMPERATURE OF A...

Page 29: ...eference table is a general guide Expect minor pressure variations Significant differences may mean improper charge or other system problem 5 Set thermostat for heat cool demand depending on mode bein...

Page 30: ...5 1 10 CBX32M 036 and CBX32MV 036 17 5 0 0 CBX32M 048 and CBX32MV 048 12 5 1 10 CBX40UHV 036 17 5 0 0 CBX40UHV 042 12 5 1 10 CBX40UHV 048 12 5 1 10 CH23 51 19 7 0 0 CH33 43 11 5 0 7 CH33 44 48B 11 5 0...

Page 31: ...43 85 29 303 151 303 150 311 145 305 144 90 32 325 152 326 151 334 146 328 146 95 35 348 154 350 152 358 147 352 147 100 38 372 155 374 153 383 149 376 148 105 41 397 156 400 154 410 150 402 150 110 4...

Page 32: ...s onto vapor and liquid lines Insert grommets into piping panel to isolate refrigerant lines from sheet metal edges TWO ISOLATION GROMMETS ARE PROVIDE FOR THE LIQUID AND SUCTION LINE PIPE PANEL PASS T...

Page 33: ...p control has three operational modes which are S Defrost calibration and operation see figure 27 S Defrost test see figure 28 DEFROST TERMINATION TEMPERATURES E47 The heat pump control selections are...

Page 34: ...first stage compressor output is active in heating mode and the outdoor ambient temperature is below the selected compressor lock in temperature the second stage compressor solenoid output will be en...

Page 35: ...is to be initiated 100 90 DEGREE TARGET 70 DEGREE TARGET 50 DEGREE TARGET 100 90 70 50 DEGREE TARGET 100 90 70 50 100 90 70 50 100 90 70 50 E47 Heat Pump Control A175 Defrost Termination E47 Pins Fact...

Page 36: ...be executed and unit will continue in the mode it was operating Place a jumper on TEST pins for more than two seconds Clears any short cycle lockout and five strike fault lockout function if applicabl...

Page 37: ...CH S87 LOCKOUT LED ALERT CODE OR CRITICAL ALERT 411 DISPLAYED SERVICE REQUIRED2 LED ALERT CODE OR MODERATE ALERT 410 DISPLAYED SERVICE REQUIRED2 NORMAL OPERATION CLOSED CLOSED OPEN OPEN 1 If 5 strike...

Page 38: ...ED SERVICE REQUIRED2 LED ALERT CODE OR MODERATE ALERT 412 DISPLAYED SERVICE REQUIRED2 NORMAL OPERATION CLOSED CLOSED OPEN OPEN 1 If 5 strike counter has four or less strikes when Y1 demand is terminat...

Page 39: ...CLEARED SERVICE REQUIRED2 LED ALERT CODE OR MODERATE ALERT 414 CLEARED NORMAL OPERATION CLOSED CLOSED OPEN OPEN 1 If 5 strike counter has four or less strikes when Y1 demand is terminatedor satisfied...

Page 40: ...RESSOR ANTI SHORT CYCLE TIMER BEGINS YES LED ALERT CODE OR MODERATE ALERT 418 CLEARED ANTI SHORT CYCLE TIMER ENDS W OUTPUT ACTIVE NORMAL OPERATION LED ALERT CODE OR MODERATE ALERT 418 CLEARED NO YES N...

Page 41: ...10 4 61693 26 2 204829 92 0 7007 42 3 24525 9 9 62712 27 0 210805 90 6 7225 41 7 24934 9 3 63752 27 8 217080 89 4 7444 41 1 25349 8 8 64812 28 7 223677 88 1 7666 40 5 25769 8 3 65895 29 5 230621 86 9...

Page 42: ...4 478 164 1 1563 120 1 3755 75 0 10495 232 4 492 163 2 1590 119 3 3816 74 1 10749 230 5 507 162 3 1617 118 5 3877 73 1 11014 228 6 523 161 4 1644 117 8 3940 72 1 11289 226 7 538 160 5 1672 117 0 4005...

Page 43: ...ormal the fault or lockout LED code is turned off automatically Table 13 System Status Fault and Lockout LED Codes and Related icomfort Touch Thermostat Alert Codes System fault and lockout LED DS11 D...

Page 44: ...lly caused by delay in outdoor unit responding to indoor unit poling Recycle power Check all wiring connections Cleared after unresponsive device responds to any inquiry None Critical Alert Code 124 A...

Page 45: ...or shorted or temperature is out of sensor range Outdoor unit control will not perform demand or time temperature defrost operation System will still heat or cool Clears when outdoor unit control dete...

Page 46: ...essure S Check for excessively low thermostat setting S Check evaporator airflow coil blockages or re turn air filter S Check ductwork or registers for blockage 4 Faulty metering device S Check TXV bu...

Page 47: ...wer reset 6 flashes then pause Off Critical Alert Code 406 Open start circuit Current not sensed by Start transformer 1 Run capacitor has failed 2 Open circuit in compressor start wiring or connection...

Page 48: ...e and then a long pause 3 The fan motor speed RPM revolutions per minute indicator is displayed next see table 15 4 There is a short pause The above sequence will continue to repeat if a thermostat de...

Page 49: ...Codes During start up the fan motor control LED will display any error conditions If error conditions exist then no other codes will display If no error conditions are present then the stage status a...

Page 50: ...WO SLOW FLASHES AND ONE SHORT PAUSE LED RPM INDICATOR EXAMPLE 2 TON 5 SLOW FLASHES AND LONG PAUSE EDA OPERATION ECM2 Y2 ONLY LED STAGE INDICATOR THREE SLOW FLASHES AND ONE SHORT PAUSE LED RPM INDICATO...

Page 51: ...om terminals see table 15 for optimal DC voltage based on CFM profile used COM FAN PWM OUT FAN PWM OUT PARK COM J2 GREEN RED BROWN RED BLACK RED RED GREEN FAN MOTOR CONTROL YELLOW BLACK YELLOW BLUE SE...

Page 52: ...N RED BLACK RED RED GREEN FAN MOTOR CONTROL YELLOW BLACK YELLOW BLUE SEE TABLE 15 FOR CFM PROFILE SELECTION OPTIONS BLACK WIRE YELLOW WIRE VAC VDC 24 EXT PWR R 24VAC INPUT DURING DEMAND ONLY INPUT VOL...

Page 53: ...ILLE MOUNTING POINTS GRILLE MOUNTING POINTS FASTENER INSERTION POINT FAN MOTOR MOUNTING POINTS PUSH FORWARD PUSH FORWARD The four mounting point holes that secure the top grille to the plastic top are...

Page 54: ...ELD TEST E33 pins within 2 to 4 seconds after removal The control s DS11 and DS14 LEDs will start blinking the Unit Nominal Code at three 3 second intervals starting at 1 ton through to 6 ton If a cod...

Page 55: ...coil more frequently if it is exposed to substances which are corrosive or which block airflow across the coil e g pet urine cottonwood seeds fertilizers fluids that may contain high levels of corros...

Page 56: ...ormed as your system removes humidity from the inside air Have your dealer show you the location of the drain line and how to check for obstructions This would also apply to an auxiliary drain if inst...

Page 57: ...d correct system refrigerant charge All components in the system must be functioning proper to correctly perform compressor modulation operational check Accurate measurements are critical to this test...

Page 58: ...ressor Discharge Line Higher Higher Indoor Return Air Same Same Indoor Coil Discharge Air Lower Higher Pressures Suction Vapor Lower Down Liquid Higher Higher Note Heat pump may have a low ambient con...

Page 59: ...mperature Return Air Temperature HEATING MODE Vapor Pressure Liquid Pressure Supply Air Temperature Ambient Temperature Return Air Temperature System Refrigerant Charge Refer to manufacturer s informa...

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