Lennox iComfort SL18XC1 Series Installation And Service Procedure Download Page 21

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Page 21

XP17

HEAT PUMP

CONTROL (A175)

CONTROL BOX

FAN MOTOR CONTROL (A177) —

PULSE-WIDTH MODULATION (PWM)

JUMPER

OFF

JUMPER

LED

CFM Profile Pin Select

VERIFY DC VOLTAGE OUTPUT USING FAN PWM OUT AND
COM TERMINALS. SEE TABLE 8 FOR OPTIMAL DC
VOLTAGE BASED ON CFM PROFILE USED.

COM

FAN PWM OUT

AN PWM OUT

ARK

COM

GREEN

RED

BROWN

RED

BLACK

RED

GREEN

FAN MOTOR

CONTROL

YELLOW

BLACK

YELLOW

BLUE

SEE TABLE 8 FOR CFM PROFILE
SELECTION OPTIONS.

YELLOW

HIGH PRESSURE SWITCH (S4)

YELLOW

B4 FAN

MOTOR

HEAT PUMP CONTROL (A175)

Figure 9. Fan Motor Control, Wiring, Jumper Settings, Testing and LED Location

Summary of Contents for iComfort SL18XC1 Series

Page 1: ...n EHB Lennox Product Catalog Lennox Price Book TABLE OF CONTENTS I OVERVIEW Model Number Identification 2 Typical Serial Number Identification 2 Specifications 2 Electrical Data 3 Unit Dimensions 4 Ty...

Page 2: ...024 230 01 02 03 04 05 62 10 lbs 0 oz 5 26 2 XP17 024 230 06 07 63 10 lbs 0 oz 5 26 2 XP17 024 230 08 63 9 lbs 10 oz 5 26 2 Model Number Unit Outdoor Fan Sound Rating Number dB 1 Factory Refrigerant C...

Page 3: ...denser Fan Maximum Over current Protection amps 1 Minimum Circuity Ampacity2 Rated Load Amps RLA Locked Rotor Amps LRA Motor HP Nominal RPM Full Load Amps FLA XP17 030 230 01 02 03 04 30 19 6 14 1 73...

Page 4: ...2 0 1 HACR type circuit breaker or fuse 2 Refer to National or Canadian Electrical Code manual to determine wire fuse and disconnect size requirements Unit Dimensions Inches Millimeters 4 5 8 117 39...

Page 5: ...NE HR1 CRANKCASE HEATER REVERSING VALVE SOLENOID L1 COMPRESSOR GROUND LUG HIGH VOLTAGE FIELD CONNECTIONS CONTACTOR 1POLE K1 1 HEAT PUMP CONTROL A175 CAPACITOR C12 FAN MOTOR CONTROL A177 SLEEVE WIRE TI...

Page 6: ...410A in the indoor unit Operating Gauge Set These instructions are intended as a general guide and do not supersede local codes in any way Consult authorities who have jurisdiction before installation...

Page 7: ...1 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 wre...

Page 8: ...ET DEFROST TERMINATION TEMPERATURE 100 90 70 50 100 90 70 50 100 90 70 50 30 0 30 SECOND DELAY SECOND DELAY 0 LED ALERT CODES HEAT PUMP CONTROL ONE STAGE E37 E47 DS11 and DS14 DS13 and DS15 E33 COMPRE...

Page 9: ...2 E28 FAN C ECM common connection for ECM fan E30 Six position square pin header P4 provides connections for the temperature sensors DIS YELLOW Not Used AMB BLACK AMB 1 Outdoor ambient temperature se...

Page 10: ...FUNCTION The five strike lockout safety function is designed to protect the unit s compressor from damage The five strike feature is used for high pressure S4 and low S87 pressure switch trips and W...

Page 11: ...he cable assembly attached to the heat pump control s E30 connection has a 10K resister installed between pins 1 and 2 as illustrated in figure 5 No alerts or alarms would be generated if resistor is...

Page 12: ...s will 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 ap...

Page 13: ...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 9 789...

Page 14: ...return to normal the alert code is turned off automatically Table 5 System Status Fault and Lockout LED Codes and Related iComfortt Enabled Thermostat Alert Codes System fault and lockout LED DS11 DS...

Page 15: ...t and did not get the expected response incorrect or no response at all from device Normally this indicate device malfunction None Critical Alert Code 124 Active subnet controller missing Device lost...

Page 16: ...When auxiliary heat output is detected as active Fault in the heat pump control Replace heat pump control 3 fast flashes then pause On Moderate Critical Alert Code 419 W output hardware fault lockout...

Page 17: ...normal run cycles or after power reset 2 flashes then pause Off Critical Alert Code 402 System pressure trip Indicates the compressor protector is open or missing supply power to the compressor 1 High...

Page 18: ...g and connectors between supply and the compressor S terminal 3 Compressor start winding is damaged Check compressor motor winding resistance Clears when amperage is de tected in RUN and START sensors...

Page 19: ...layed Fan motor speeds are not adjustable for a single stage outdoor unit see table 8 Verifying Correct DC Output Voltage J2 The following three methods can be used to determine whether the fan motor...

Page 20: ...trol LED One Stage Operation Low Stage ECM1 Y1 ONLY One slow flash then short pause RPM Indicator NOTE There is a long pause between stage operation and RPM indicator See tables 1 and 2 for LED RPM in...

Page 21: ...ERMINALS SEE TABLE 8 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 SEE TAB...

Page 22: ...GH PRESSURE SWITCH GREEN RED BROWN RED BLACK RED RED GREEN FAN MOTOR CONTROL YELLOW BLACK YELLOW BLUE SEE TABLE 8 FOR CFM PROFILE SELECTION OPTIONS BLACK WIRE YELLOW WIRE VAC VDC 24 EXT PWR R 24VAC IN...

Page 23: ...his is a test that will verify that the motor does operate J2 1 Verify main 240 volt power if OFF to unit 2 Remove both wires brown and black from the J2 terminal on the fan motor control A177 3 Room...

Page 24: ...nce GRILLE 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 T...

Page 25: ...ely from E33 Place jumper on FIELD 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...

Page 26: ...cycling routine when activated will cycle the fan ON for five minutes if the outdoor ambient air temperature is between 15 F and 35 F and the compressor has been OFF for 25 to 30 minutes This option i...

Page 27: ...DISPLAY PUSH BUTTON NOTE LINK NOT APPLICABLE TO SINGLE STAGE UNIT CUTTING LINK WILL HAVE NO AFFECT ON OPERATION OF SINGLE STAGE UNITS MAX 90 DEGREE TARGET 70 DEGREE TARGET 50 DEGREE TARGET 90 70 50 T...

Page 28: ...the control will detect the unit type as a heat pump Anytime there is no connection to O terminal the control will detect the unit type as a air conditioner Anytime there is a connection to Y2 OUT te...

Page 29: ...t type capacity or fan RPM If this happens the configuration sequence for that section of the string must be repeated Yes No OUTDOOR CONTROL SEVEN SEGMENT DISPLAY PUSH BUTTON One stage air conditioner...

Page 30: ...Profile Power up Unit capacity two digit number and displayed represents unit size code outdoor unit capacity Unit Capacity Code 12 18 24 30 36 42 48 60 1 TON 1 1 2 TON 2 TON 2 1 2 TON 3 TON 3 1 2 TON...

Page 31: ...30 225 14 XC21 048 060 and XP21 048 83 600 92 675 30 225 15 XP21 060 86 625 97 700 30 225 Seven Segment Alert and System Status Codes Alert codes are displayed using the seven segment display located...

Page 32: ...n 18 hours continuously Compressor ran more than 18 hours to satisfy a single thermostat demand If the unit is 2 stage the high speed will lock out and the unit will run at low speed If it is a HP and...

Page 33: ...conds the board will count one fault After 5 faults the board will lock out Check for proper sensor reading and attachment to line The alarm clears after a power reset E 418 There is a faulty W output...

Page 34: ...isplay of nominal capacity Fan Profile code a single or two digit number See table 11 for applicable fan RPM pro file POWER UP 7 SEGMENT DISPLAY STRING Unit Type Stages Capacity Fan Profile Displays t...

Page 35: ...mode pause pause Dehumidification mode Shows that the unit is providing dehu midification instead of straight cooling Following string is repeated if dehumidification is active with outdoor fan speed...

Page 36: ...r 14 minutes if coil temperature remains below terminate temperature or by pushing button down for less than 2 seconds Enter test mode Display will string active error codes ambient coil and discharge...

Page 37: ...in a communicating system the fan profile will need to be set because the iComfort enabled thermostat does not know what the profile should be Refer to the iComfort enabled Thermostat Installer Setup...

Page 38: ...Lennox Product Catalog Lennox Price Book SunSource Home Energy System This Dave Lennox Signature Collection heat pump is factory equipped with components that make it SunSource solar ready These units...

Page 39: ...right identifies the sound reduction parts Assembly procedure is as follows 1 Remove discharge grommet 2 Install suction grommet 3 Install SR1 left and right side covers 4 Fasten new bottom cable tie...

Page 40: ...ature Return Air Temperature HEATING MODE Vapor Pressure Liquid Pressure Supply Air Temperature Ambient Temperature Return Air Temperature System Refrigerant Charge Refer to manufacturer s information...

Page 41: ...ian will need to visually inspect the unit being service to determine which wiring diagram is applicable Quick verification can usually be made by comparing the wiring diagram located on the unit acce...

Page 42: ...Page 42 XP17 Figure 19 Typical XP17 Wiring Non Communicating Surge Protection and A177 Fan Motor Control Wiring Change XP17 XXX 230 02...

Page 43: ...Page 43 XP17 Figure 20 Typical XP17 Wiring Communicating No Surge Protection and A177 Fan Motor Control Wiring Change XP17 XXX 230 02 through 05...

Page 44: ...Page 44 XP17 Figure 21 Typical XP17 Wiring XP17 XX 230 06...

Page 45: ...Page 45 XP17 Factory Wiring Diagrams Figure 22 Typical Factory Wiring XP17 XX 230 01...

Page 46: ...Page 46 XP17 Figure 23 Typical Factory Wiring XP17 XX 230 02...

Page 47: ...Page 47 XP17 Figure 24 Typical Factory Wiring XP17 XX 230 03 and 05...

Page 48: ...Page 48 XP17 Figure 25 Typical Factory Wiring XP17 XX 230 06...

Page 49: ...in the utility load control receiver are closed The R iComfort communication wire between the indoor unit and iComfort outdoor unit is connected and iComfort communication is restored The outdoor uni...

Page 50: ...actor coil and the compressor will be cycled OFF The outdoor fan will continue to operate during a thermostat demand The 7 segment display on the outdoor control will NOT display an alert code and the...

Page 51: ...ng method is not applicable to early production XC17 XP17 XC21 and XP21 outdoor units that used outdoor control 101796 xx 101797 xx 101798 xx and 101799 xx Utility Load Control Receiver Contacts N C c...

Page 52: ...OUT 2 24VAC to reversing valve output O terminal 3 Output between 24 and 32 VDC on heat pump control s ECM fan terminals ECM Y1 FAN and ECM C NOTE If lower pressure switch is closed system will ignore...

Page 53: ...ACHES 5 WITHIN A SINGLE Y1 DEMAND LOW PRESSURE SWITCH S87 LOCKOUT LED ALERT CODE OR CRITICAL ALERT 411 DISPLAYED SERVICE REQUIRED2 LED ALERT CODE OR MODERATE ALERT 410 DISPLAYED SERVICE REQUIRED2 NORM...

Page 54: ...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 terminated...

Page 55: ...initi ated 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 Factory Def...

Page 56: ...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 57: ...t 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 36 detail A PLACING UNIT ON S...

Page 58: ...above a load bearing wall or area of the roof that can adequately support the unit Consult local codes for rooftop applications If unit coil cannot be mounted away from prevailing winter winds a wind...

Page 59: ...PLASTIC ANCHOR HOLE DRILL 1 8 INSTALL UNIT LEVEL OR IF ON A SLOPE MAINTAIN SLOPE TOLERANCE OF 2 DEGREES OR 2 INCHES PER 5 FEET 50 MM PER 1 5 M AWAY FROM BUILDING STRUCTURE MOUNTING SLAB BUILDING STRU...

Page 60: ...s illustrated in detail D with the screw side as close to the unit as possible Then in a continuous motion 1 Slightly rotate and guide the lip of top tab inward as illustrated in detail A and C then u...

Page 61: ...for minimum circuit ampacity and maximum overcurrent protection size 24VAC TRANSFORMER Use the transformer provided with the furnace or air handler for low voltage control power 24VAC 40 VA minimum Re...

Page 62: ...pump control A175 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 temperature rating 95 F 35 C mini...

Page 63: ...factory with metal jumpers installed across W1 W2 and W3 For one stage electric heat do not remove factory installed metal jumpers 4 Air handler control ships from factory with metal jumpers installed...

Page 64: ...parately 3 Cut on board link W951 clippable wire from R O HEAT PUMP for heat pump applications 4 Cut on board link clippable wire DS R for Humiditrol or Harmony III applications This will slow the ind...

Page 65: ...15 50 ft 5 15m 042 048 060 3 8 10 1 1 8 29 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 tha...

Page 66: ...d be used if line set is to be installed on exterior of outside wall PVC PIPE FIBERGLASS INSULATION CAULK OUTSIDE WALL VAPOR LINE WRAPPED WITH ARMAFLEX LIQUID LINE OUTSIDE WALL LIQUID LINE VAPOR LINE...

Page 67: ...orm 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 IMPORTANT...

Page 68: ...ROGEN 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 from nicks o...

Page 69: ...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 will...

Page 70: ...itting to temporary reconnect the liquid line to the indoor unit s liquid line orifice housing LOW HIGH EXISTING INDOOR UNIT GAUGE MANIFOLD INVERTED HCFC 22 CYLINDER CONTAINS CLEAN HCFC 22 TO BE USED...

Page 71: ...APPLICATION INFORMATION A REMOVE THE FIELD PROVIDED FITTING THAT TEMPORARILY RECON NECTED THE LIQUID LINE TO THE INDOOR UNIT S DISTRIBUTOR AS SEMBLY B INSTALL ONE OF THE PROVIDED TEFLON RINGS AROUND...

Page 72: ...efrigerant Residual mineral oil can act as an insulator preventing proper heat transfer It can also clog the expansion device and reduce the system performance and capacity Failure to properly flush t...

Page 73: ...er of dry nitrogen with a pressure regulating valve to the center port of the manifold gauge set D Adjust dry nitrogen pressure to 150 psig 1034 kPa Open the valve on the high side of the manifold gau...

Page 74: ...AUGE SET A B C D LINE SET AND INDOOR COIL NOTE Remove cores from service valves if not al ready done Figure 44 Connecting Gauge Set EVACUATE LINE SET AND INDOOR COIL The unit is shipped with a factory...

Page 75: ...for one hour During this time dry nitrogen will diffuse throughout the system absorbing moisture 5 Repeat this procedure as indicated in figure 46 System will then be free of any airborne containment...

Page 76: ...lue listed in table 1 5 Check voltage supply at the disconnect switch The voltage must be within the range listed on the unit s nameplate If not do not start the equipment until you have consulted wit...

Page 77: ...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 air entering indo...

Page 78: ...nameplate for charging CHARGING METHOD NOTE Insulate liquid line when it is routed through areas where the surrounding ambient temperature could become higher than the temperature of the liquid line o...

Page 79: ...ing sure to note any additional charge for line set and or match up 10 If subcooling value is greater than shown on unit charging sticker for the applicable unit remove refrigerant if less than shown...

Page 80: ...7 130 475 6 146 579 8 38 113 6 54 152 8 69 197 3 85 254 1 100 317 2 116 396 0 131 481 6 147 586 8 39 115 8 55 155 5 70 200 6 86 258 0 101 321 8 117 401 3 132 487 8 148 593 8 40 118 0 56 158 2 71 203 9...

Page 81: ...icable Charging Sticker by Unit Model Number Unit Model Number Unit Charging Sticker Numbers 580287 01 580320 01 Reference charging stickers above are located at the end of this manual XP17 024 230 XX...

Page 82: ...5 29 310 148 312 143 306 142 315 144 319 141 322 138 95 35 356 150 358 146 354 144 362 147 366 144 369 140 105 41 405 152 408 148 406 147 415 147 418 146 422 142 115 45 456 155 462 150 463 150 472 150...

Page 83: ...78 136 85 29 310 148 312 143 306 142 315 144 319 141 322 138 95 35 356 150 358 146 354 144 362 147 366 144 369 140 105 41 405 152 408 148 406 147 415 147 418 146 422 142 115 45 456 155 462 150 463 150...

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