Page 2 - Unit Dimensions − Inches (mm) and Parts Arrangement; BASE WITH ELONGATED LEGS; Model Number Identification
Page 2 506510−01 Unit Dimensions − Inches (mm) and Parts Arrangement 4−5/8(117) 39.40" (1003) 35.50" (902) 18.60" (470) 8.00" (203) 1 (25) LIQUIDLINEINLET SUCTION LINEINLET ELECTRICAL INLETS BASE WITH ELONGATED LEGS SIDE VIEW ACCESS VIEW DISCHARGE AIR [−024] 41 (1040) [−030 THROUGH −...
Page 3 - Typical Unit Parts Arrangement; CONTROL BOX; Figure 1. Typical Parts Arrangements
Page 3 XC17 SERIES Typical Unit Parts Arrangement LIQUID LINE FILTER DRIER (SINGLE FLOW) HIGH PRESSURE SWITCH FIELD CONNECTION FOR LIQUID LINE SET LIQUID LINE SERVICE VALVE LIQUID LINE SERVICE VALVE PORT SUCTION LINE SERVICE VALVE PORT SUCTION LINE SERVICE VALVE FIELD CONNECTION FOR SUCTION LINE MUF...
Page 4 - Operating Gauge Set and Service Valves; TORQUE REQUIREMENTS; USING MANIFOLD GAUGE SET
Page 4 506510−01 CAUTION Physical contact with metal edges and corners whileapplying excessive force or rapid motion can result inpersonal injury. Be aware of, and use caution whenworking near these areas during installation or whileservicing this equipment. IMPORTANT The Clean Air Act of 1990 bans ...
Page 5 - SERVICE VALVES; VARIOUS TYPES; Operating Ball Type Service Valve:; Figure 2. Angle and Ball Service Valves
Page 5 XC17 SERIES (VALVE STEM SHOWNCLOSED) INSERT HEXWRENCH HERE VALVE STEM FRONT-SEATED TO OUTDOOR UNIT SERVICE PORT CORE TO INDOOR UNIT SERVICE PORT SERVICE PORT CAP CLOSED TO BOTH INDOOR AND OUTDOOR UNITS STEM CAP ANGLE−TYPE SERVICE VALVE (FRONT−SEATED CLOSED) SERVICE PORT SERVICE PORT CORE TO O...
Page 6 - Recovering Refrigerant from Existing System; DISCONNECT POWER; RECOVERING; REFRIGERANT FROM SYSTEM
Page 6 506510−01 Recovering Refrigerant from Existing System SERVICE DISCONNECT SWITCH MAIN FUSE BOX/BREAKER PANEL Disconnect all power to the existing outdoor unit at the disconnectswitch or main fuse box/breaker panel. DISCONNECT POWER CONNECT MANIFOLD GAUGE SET MANIFOLD GAUGES RECOVERY MACHINE CL...
Page 7 - New Outdoor Unit Placement; CAUTION; See
Page 7 XC17 SERIES CONTROL PANEL ACCESS LOCATION 6 (152) 36 (914) 12 (305) 30 (762) LINE SETCONNECTIONS 24 (610) LINE SET CONNECTIONS ACCESS PANEL REAR VIEW OF UNIT 48 (1219) MINIMUM CLEARANCE BETWEEN TWO UNITS CLEARANCE ON ALL SIDES INCHES (MILLIMETERS) ACCESS PANEL MINIMUM CLEARANCE ABOVE UNIT NOT...
Page 8 - ROOF MOUNTING; NOTICE
Page 8 506510−01 ELEVATING THE UNIT Units are outfitted with elongated support feet as illustratedin Figure 4, Detail C. If additional elevation is necessary, raise the unit byextending the height of the unit support feet. This may beachieved by using a 2 inch (50.8mm) Schedule 40 femalethreaded ada...
Page 9 - DETAIL A
Page 9 XC17 SERIES LEG DETAIL BASE 2" (50.8MM) SCH 40 FEMALE THREADED ADAPTER ONE BRACKET PER SIDE (MIN.); FOR EXTRA STABILITY, TWOBRACKETS PER SIDE, 2" (50.8MM) FROM EACH CORNER. CONCRETE SLAB USE TWO PLASTIC ANCHORS (HOLE DRILL 1/4") COIL BASE PAN CORNER POST STABILIZING BRACKET (18 GA...
Page 10 - Removing and Installing Panels; PANELS; WARNING
Page 10 506510−01 Removing and Installing Panels REMOVE 4 SCREWS TOREMOVE PANEL FORACCESSING COMPRESSORAND CONTROLS. POSITION PANEL WITH HOLESALIGNED; INSTALL SCREWSAND TIGHTEN. ACCESS PANEL REMOVAL Removal and reinstallation of the accesspanel is as illustrated. Detail A Detail C Detail B ROTATE IN...
Page 11 - New or Replacement Line Set; REFRIGERANT LINE SET; If that is not possible and the line set is the; Mineral oils are not compatible with HFC−410A
Page 11 XC17 SERIES New or Replacement Line Set REFRIGERANT LINE SET This section provides information on installation orreplacement of existing line set. If new or replacement lineset is not being installed then proceed to Brazing Connections on page 13. IMPORTANT Lennox highly recommends changing ...
Page 12 - LINE SET; with
Page 12 506510−01 ANCHORED HEAVY NYLON WIRE TIE OR AUTOMOTIVE MUFFLER-TYPE HANGER STRAP LIQUID LINE TOVAPOR LINE WALL STUD LIQUID LINE NON−CORROSIVE METAL SLEEVE VAPOR LINE − WRAPPEDIN ARMAFLEX AUTOMOTIVE MUFFLER-TYPE HANGER REFRIGERANT LINE SET TRANSITION FROM VERTICAL TO HORIZONTAL Line Set Isolat...
Page 13 - CONNECTIONS; BRAZING
Page 13 XC17 SERIES CUT AND DEBUR CAP AND CORE REMOVAL Cut ends of the refrigerant lines square(free from nicks or dents) and debur theends. The pipe must remain round and donot pinch end of the line. Remove service cap and corefrom both the vapor and liquid lineservice ports. ATTACHED GAUGES OUTDOO...
Page 14 - Flushing the System; OR; FLUSHING
Page 14 506510−01 Flushing the System SENSING LINE TEFLON RING FIXED ORIFICE (Uncased Coil Shown) BRASS NUT LIQUID LINE ASSEMBLY (INCLUDES STRAINER) LIQUID LINE ORIFICE HOUSING DISTRIBUTOR TUBES DISTRIBUTOR ASSEMBLY REMOVE AND DISCARD WHITE TEFLON SEAL (IF PRESENT) A On fully cased coils, remove the...
Page 16 - INSTALLING ISOLATION GROMMETS; Figure 6. Isolation Grommets; Leak Testing the System
Page 16 506510−01 INSTALLING ISOLATION GROMMETS Locate the isolation grommets (provided). Slide grommetsonto vapor and liquid lines. Insert grommets into pipingpanel to isolate refrigerant lines from sheet metal edges. TWO ISOLATION GROMMETS AREPROVIDE FOR THE LIQUID ANDSUCTION LINE PIPE PANEL PASST...
Page 17 - LINE SET AND INDOOR COIL; LEAK TEST
Page 17 XC17 SERIES TO VAPOR SERVICE VALVE HFC−410A MANIFOLD GAUGE SET OUTDOOR UNIT HIGH LOW NITROGEN NOTE Normally, the high pressure hose is connected to the liquid line port. How-ever, connecting it to the vapor port better protects the manifold gauge set from highpressure damage. A With both man...
Page 18 - Evacuating the System; EVACUATING
Page 18 506510−01 Evacuating the System A Open both manifold valves and start the vacuum pump. B Evacuate the line set and indoor unit to an absolute pressure of 23,000 microns (29.01 inches of mercury). NOTE During the early stages of evacuation, it is desirable to close the manifold gauge valve at...
Page 19 - Electrical; 4VAC TRANSFORMER; INSTALL THERMOSTAT; ELECTROSTATIC DISCHARGE
Page 19 XC17 SERIES IMPORTANT Use a thermocouple or thermistor electronic vacuumgauge that is calibrated in microns. Use an instrumentcapable of accurately measuring down to 50 microns. WARNING Danger of Equipment Damage. Avoid deep vacuumoperation. Do not use compressors to evacuate asystem. Extrem...
Page 20 - ROUTE CONTROL WIRES; ROUTE HIGH VOLTAGE AND GROUND WIRES; ACCESS VIEW
Page 20 506510−01 NOTE For proper voltages, select thermostat wire (control wires)gauge per table below. WIRE RUN LENGTH AWG# INSULATION TYPE LESS THAN 100’ (30 METERS) 18 TEMPERATURE RATING MORE THAN 100’ (30 METERS) 16 35ºC MINIMUM. NOTE Wire tie provides low voltage wire strain relief and to main...
Page 21 - Figure 7. Typical XC17 Wiring
Page 22 - Main Control Jumpers and Terminals; MAIN CONTROL AIR CONDITIONER ONE STAGE; TEST PINS; Figure 8. Control Jumpers, Loop and Terminals
Page 22 506510−01 Main Control Jumpers and Terminals MAIN CONTROL AIR CONDITIONER ONE STAGE TABLE 3 PROVIDES ADDITIONAL INFORMATION CONCERNING JUMPERS, LOOP, AND CONNECTIONSFOR THE MAIN CONTROL. DS13 and DS15 DS11 and DS14 LED ALERT CODES LED ALERT CODES CUT FOR HUMIDITROL ENHANCEDDEHUMIDIFICATION A...
Page 23 - Table 3. Main Control Jumpers and Terminals
Page 23 XC17 SERIES Table 3. Main Control Jumpers and Terminals Board ID Label Description E12 PSC Fan 240 VAC output connection for outdoor fan. E16 PSC Fan 240 VAC input connection for outdoor fan. E18 W 24VAC output for defrost auxiliary heat output. L Thermostat service light connection. Y2 24VA...
Page 24 - Field Control Wiring; Figure 9. ComfortSense® 7000 Series Thermostat
Page 24 506510−01 Field Control Wiring Y1 O R W1 G D R Y1 L C C Air Handler Control ComfortSense [ 7000 Thermostats Catalog # Y0349 or Y2081 One − Stage Air Conditioner Control B Y2 Y2 W O DS L T T W2 H W3 H O C L Y2 DS DH G R Y1 W2 W1 R connection required for outdoor unit with Control LSOM functio...
Page 25 - Figure 10. ComfortSense® 7000 Series Thermostat
Page 25 XC17 SERIES Y1 O R W1 G D R Y1 L C C Furnace Control ComfortSense [ 7000 Thermostats Catalog # Y0349 or Y2081 One − Stage Air Conditioner Control B Y2 Y2 W O DS L T T W2 H H O C L Y2 DS DH G R Y1 W2 W1 R connection required for outdoor unit with Control LSOM function. Resistor Kit (Cat# 47W9...
Page 26 - Servicing Units Delivered Void of Charge; If system dryness is not; Unit Start−Up; System Refrigerant; CONNECTIONS FOR TESTING AND CHARGING; GAUGE SET; Figure 11. Gauge Set Setup and Connections
Page 26 506510−01 Servicing Units Delivered Void of Charge If the outdoor unit is void of refrigerant, clean the systemusing the procedure described below. 1. Leak check system using procedure outlined on Page 16. 2. Evacuate the system using procedure outlined on Page 18. 3. Use nitrogen to break t...
Page 27 - AIRFLOW
Page 27 XC17 SERIES ADDING OR REMOVING REFRIGERANT This system uses HFC−410A refrigerant which operates at much higher pressures than HCFC−22. The pre−installed liquidline filter drier is approved for use with HFC−410A only. Do not replace it with components designed for use with HCFC−22.This unit i...
Page 28 - TXV; START: Determine the correct charge method:; WEIGH IN; CHARGING METHOD
Page 28 506510−01 Use WEIGH IN to initially charge a system when the outdoor unit is void of charge. To verify charge and add or remove refrigerant use either APPROACH or SUBCOOLING methods. WHEN TO CHARGE? S Warm weather best S Can charge in colder weather CHARGE METHOD? Determine by: S Outdoor amb...
Page 29 - TEST AND CHARGE METHOD; Figure 15. Using Approach Test and Charge Method; SUBCOOLING; TEST AND CHARGE METHOD
Page 29 XC17 SERIES APPº (Approach) Values(F:+/−1.0° [C: +/−0.6°])* If refrigerant added or removed, retest to confirm that unit is properlycharged If value is greater than shown (high approach), add refrigerant; if lessthan shown (liquid temp too close to ambient temp, low approach),remove refriger...
Page 30 - Operating and Temperature Pressures
Page 30 506510−01 Operating and Temperature Pressures Minor variations in these pressures may be expected due to differences in installations. Significant differences could meanthat the system is not properly charged or that a problem exists with some component in the system. Table 4. Normal Operati...
Page 31 - System Operation; SENSOR
Page 31 XC17 SERIES System Operation IMPORTANT Some scroll compressor have internal vacuum protectorthat will unload scrolls when suction pressure goesbelow 20 psig. A hissing sound will be heard when thecompressor is running unloaded. Protector will resetwhen low pressure in system is raised above ...
Page 32 - TEST PINS FUNCTION; Placing the
Page 32 506510−01 TEST PINS FUNCTION Placing the JUMPER ON the field test pins (E33) (see Page 22 for location of TEST pins) allows the technician to S Clear compressor anti−short cycle delay. S Clear five−strike fault lockouts High / Low pressure switches and High Discharge Temperature Sensor. NOTE...
Page 33 - Table 6. Ambient Sensor Temperature / Resistance Range
Page 33 XC17 SERIES Table 6. Ambient Sensor Temperature / Resistance Range Degrees Fahrenheit Resistance Degrees Fahrenheit Resistance Degrees Fahrenheit Resistance Degrees Fahrenheit Resistance 136.3 2680 56.8 16657 21.6 44154 −11.3 123152 133.1 2859 56.0 16973 21.0 44851 −11.9 125787 130.1 3040 55...
Page 34 - Table 7. High Discharge Sensor Temperature / Resistance Range
Page 34 506510−01 Table 7. High Discharge Sensor 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 ...
Page 35 - Main Control LED Alert Codes; Disconnect
Page 35 XC17 SERIES Table 8. Sensor Temperature / Resistance Range Sensor TemperatureRange °F (°C) Resistance valuesrange (ohms) Pins/WireColor Outdoor(Ambient) −40ºF to 140ºF(−40ºC to 60ºC) 280,000 to 3750 3 and 4(Black) Discharge −35ºF to 310ºF (−37ºC to 154ºC) 41,000 to 103 1 and 2(Yellow) Note: ...
Page 37 - Table 10. Compressor LED Alert Codes
Page 37 XC17 SERIES Table 10. Compressor LED Alert Codes Outdoor Main Control LEDs Condition PossibleCause(s) Solution Clearing Status DS15Yellow DS13 Red OFF ON Compressor Internal Overload Trip Thermostatdemand signal Y1is present, butcompressor notrunning 1 Compressor protector is open. S Check f...
Page 39 - Figure 19. High Pressure Switch Operation
Page 39 XC17 SERIES Figure 19. High Pressure Switch Operation
Page 40 - Figure 20. Low Pressure Switch Operation
Page 40 506510−01 Figure 20. Low Pressure Switch Operation
Page 41 - Figure 21. High Discharge Temperature Sensor Operation
Page 41 XC17 SERIES Figure 21. High Discharge Temperature Sensor Operation
Page 42 - Maintenance; DEALER; Verifying Fan Motor Operation; FAN MOTOR CONTROL AND START UP
Page 42 506510−01 Maintenance WARNING Electric shock hazard. Can cause injuryor death. Before attempting to performany service or maintenance, turn theelectrical power to unit OFF at disconnectswitch(es). Unit may have multiple powersupplies. WARNING Improper installation, adjustment, alteration, se...
Page 43 - LED CODES AND SEQUENCE OF OPERATIONS; Table 13. Fan Motor Board Unit LED Codes; Figure 22. Single Stage LED Sequence of Operation
Page 43 XC17 SERIES LED CODES AND SEQUENCE OF OPERATIONS During start up, the LED will first display any error conditions (see table 12) if present. If no errors are detected then the LEDcode indicating one or two stage operation will display then a long pause. The RPM indicator is displayed next. A...
Page 44 - CONTROL PANEL
Page 44 506510−01 MAIN CONTROL CONTROL PANEL FAN MOTOR CONTROL PULSE−WIDTH MODULATION (PWM) JUMPER OFF JUMPER ON J2 LED CFM Profile Pin Select VERIFY DC VOLTAGE OUTPUT USING FAN PWM OUT ANDCOM TERMINALS. SEE TABLE 11 FOR OPTIMAL DCVOLTAGE BASED ON CFM PROFILE USED. COM FAN PWM OUT GREEN RED BROWN RE...
Page 46 - FAN MOTOR TEST PROCEDURE; FAN MOTOR TEST; This is a test that will verify that the motor does operate.
Page 46 506510−01 FAN MOTOR TEST PROCEDURE A simple test can be used to test the fan motor operation. A fully charged 9V battery will be required for this procedure. J2 F A N PWM OUT P ARK COM BLACK LEAD BROWN LEAD BROWN LEAD BLACK LEAD REMOVE BOTH LEADS FROM J2 TERMINALS CONNECT FAN MOTOR BLACK COM...
Page 47 - Belt Drive Blowers −; Indoor Coil; HOMEOWNER
Page 47 XC17 SERIES FAN MOTOR SURGE PROTECTION Surge Protector (Metal Oxide Varistor − MOV) − A part designed to protect electrical devices from voltage spikesthat are 3 to 4 times the normal circuit voltage (See Figure26 for illustration of component). An MOV works as follows: It is essentially a b...
Page 48 - XC17 Start−Up and Performance Checklist
Page 48 506510−01 Outdoor Coil The outdoor unit must be properly maintained to ensure itsproper operation. S Please contact your dealer to schedule properinspection and maintenance for your equipment. S Make sure no obstructions restrict airflow to theoutdoor unit. S Grass clippings, leaves, or shru...
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