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Lennox International Inc. 506510

1. T ANN RR RR REIR Ji E E Slab Mounting at Ground Level DETAIL D Slab Side Mounting 10 1 2 LONG SELF DRILLING SHEET METAL SCREWS A STABILIZING BRACKET 18 GAUGE N METAL 2 WIDTH HEIGHT 5 lt BASE PAN REQUIRED 10 1 1 4 LONG HEX HD SCREW AND FLAT WASHER N CONCRETE SLAB USE TWO PLASTIC ANCHORS HOLE DRILL 1 4 WOOD OR PLASTIC SLAB NO PLASTIC ANCHOR HOLE DRILL 1 8 MINIMUM ONE Deck Top Mounting PER SIDE oF STABILIZING BRACKET 18 GAUGE METAL A 2 50 8MM WIDTH HEIGHT AS n REQUIRED BEND TO FORM RIGHT ANGLE N gem SAME FASTENERS AS FORERO SLAB SIDE MOUNTING ONE BRACKET PER SIDE MIN FOR EXTRA STABILITY TWO BRACKETS PER SIDE 2 50 8MM FROM EACH CORNER Stabilizing Unit on Uneven Surfaces IMPORTANT To help stabilize an outdoor unit some installations may require strap ping the unit to the pad using brackets and anchors commonly available in the market place Figure 4 Placement Slab Mounting and Stabilizing Unit Page 9 XC17 SERIES Removing and Installing Panels ACCESS PANEL REMOVAL PA N
2. Degrees Degrees Degrees Degrees Resistance Resistance Resistance athena an 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
3. SEE CFM PROFILE SELECTION TABLE PWM FAN CONTROL SEE TABLE 11 FOR CFM PROFILE SELECTION OPTIONS 108108 Lo P MW P Wr ONT e ES BLA YELLOW Figure 24 Testing for External Power to Fan Control Page 45 XC17 SERIES 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 FAN MOTOR TEST This is a test that will verify that the motor does operate Verify main 240 volt power if OFF to unit Remove both wires brown and black from the J2 terminal on the fan motor control Room thermostat should be in OFF position Unit in idle mode no heating or cooling demands Turn main power 240 volt ON to unit Connect 9 Volt batter to outdoor fan motor plugs as noted in pic ture below Outdoor fan motor should run at a reduced fan speed If Outdoor fan motor does not run then replace fan motor assem bly FAN MOTOR CONTROL BROWN LEAD BROWN LEAD BLACK LEAD CONNECT FAN MOTOR WIRE TO 9V BATTERY POSITIVE TERMINAL CONNECT FAN MOTOR BLACK COMMON WIRE TO 9V BATTERY NEGATIVE TERMINAL NEGATIVE TERMINAL REMOVE BOTH LEADS FROM J2 TERMINALS BLACK LEAD z x lt n kK 2 gt n lt BROWN LEAD FULLY CHARGED 9V BATTERY Figure 25 Fan Motor Test Page 46
4. These subcooling values are also listed on the unit charging sticker 580005 01 located on the access panel Confirm proper airflow across coil using Figure 12 Compare unit pressures with Table 4 Normal Operating Pressures Use SUBCOOLING to correctly charge unit or to verify the charge is correct Set thermostat to call for heat must have a cooling load between 70 80 F 21 26 C Connect gauge set Measure outdoor ambient temperature When heat demand is satisfied set thermostat to call for cooling Allow temperatures and pressures to stabilize NOTE If necessary block outdoor coil to maintain 325 375 psig Record liquid line temperature LIQ Measure liquid line pressure and use the value to determine saturation temperature see Table 5 SAT Subtract to determine subcooling SC SAT LIQ 5 Compare results with table to the left Figure 16 Using Subcooling Test and Charge Method Page 29 XC17 SERIES Operating and Temperature Pressures Minor variations in these pressures may be expected due to differences in installations Significant differences could mean that the system is not properly charged or that a problem exists with some component in the system Table 4 Normal Operating Pressures Liquid 10 and Suction 5 psig Use this table to perform maintenance checks it is not a procedure for charging the system Minor variations in the
5. ED GG 0000 00099090 Cut on board link W914 clippable wire from DS R for dehumidification Optional AN Outdoor sensor for outdoor temperature display Optional R connection required for outdoor unit with Control LSOM function Resistor Kit Cat 47W97 is required when using the ComfortSense 7000 0349 with Control LSOM feature Resistor kit not required when using ComfortSense 7000 Y2081 A Cut for Humiditrol Enhanced Dehumidification Accessory EDA applications Figure 10 ComfortSense 7000 Series Thermostat Furnace One Stage Air Conditioner Page 25 XC17 SERIES Servicing Units Delivered Void of Charge If the outdoor unit is void of refrigerant clean the system using 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 the vacuum and install a new filter drier in the system 4 Evacuate the system again using procedure outlined on Page 18 5 Weigh in refrigerant using procedure outlined in Figure 14 6 Monitor the system to determine the amount of moisture remaining in the oil It may be necessary to replace the filter drier several times to achieve the required dryness level If system dryness is not verified the compressor will fail in the future Unit Start Up A IMPORTANT If unit is equipped with a crankcase heater
6. 506510 01 FAN MOTOR SURGE PROTECTION Surge Protector Metal Oxide Varistor MOV A part designed to protect electrical devices from voltage spikes that are 3 to 4 times the normal circuit voltage See Figure 26 for illustration of component An MOV works as follows It is essentially a batch of metallic oxide grains separated by insulating layers Repeated voltage surges break down the insulating layers lowering the overall resistance and eventually causing the device to draw too much current and trip whatever over current protection is inherent in the system MOV Check They are supposed to be located beyond the line fuse though possibly not always In this case where the line fuse blows or circuit breaker trips but there is no visible damage to the MOV s the simplest test may be to just temporarily remove the MOV s and see if the problem goes away See Figure 1 for location of the Surge Protections device which is located in the unit control box area 250 INSULATED QUICK CONNECT 8 RING TERMINAL Figure 26 Fan Motor Surge Protection Device Outdoor Unit Maintenance and service must be performed by a qualified installer or service agency At the beginning of each cooling season the system should be checked as follows 1 Outdoor unit fan motor is pre lubricated and sealed No further lubrication is needed 2 Visually inspect all connecting lines joints and coils for evidence of oil leaks 3
7. 4 Make sure all pressure switches and sensors have secure connec tions to system to prevent refrigerant leaks or errors in pressure and temperature measurements Discharge Line Temperature Fault Discharge Line Temperature Lockout This code detects high discharge temperatures If the discharge line temperature exceeds a temperature of 279 F 137 C during compressor operation the control will de energize the compressor contactor output and the defrost output if active The compressor will remain off until the discharge temperature has dropped below 225 F 107 C See Figure 21 for further details concerning lockouts and reset procedures Fast Flash Discharge Sensor Fault The control detects open or short sensor or out of temperature sensor range This fault is detected by allowing the unit to run for 90 seconds before checking sensor resistance If the sensor resistance is not within range after 90 seconds the control will raise the alarm Fast simultaneous flashing of DS11 DS13 DS14 and DS15 506510 01 OEM Mode Factory Test Mode Page 36 Outdoor Main Control LEDs DS15 Yellow DS13 Red Condition Compressor Internal Overload Trip Table 10 Compressor LED Alert Codes Possible Cause s Thermostat demand signal Y 1 is present but compressor not running Solution 1 Compressor protector is open e Check for high head pressure e Check compressor supply vol
8. IMPORTANT Connect gauge set low pressure side to vapor line service valve and repeat procedure starting at paragraph 4 for brazing the liquid line to service port valve Page 13 XC17 SERIES Flushing the System FLUSHING LINE SET AND INDOOR COIL 1 OF 2 1 TWO PIEC UNCASED COIL ONLY TYPICAL FIXED ORIFICE REMOVAL PROCEDURE Uncased Coil Shown vi DISTRIBUTOR TUBES LIQUID LINE ORIFICE HOUSING ay TEFLON RING FIXED ORIFICE OR BRASS NUT DISTRIBUTOR 7 ASSEMBLY REMOVE AND DISCARD WHITE TEFLON SEAL IF PRESENT LIQUID LINE ASSEMBLY INCLUDES STRAINER On fully cased coils remove the coil access and plumbing panels Remove any shipping clamps holding the liquid line and distributor assembly Using two wrenches disconnect liquid line from liquid line orifice housing Take care not to twist or damage distributor tubes during this process Remove and discard fixed orifice valve stem assembly if present and Teflon washer as illustrated above Use a field provided fitting to temporary reconnect the liquid line to the indoor unit s liquid line orifice housing CONNECT GAUGES AND EQUIPMENT FOR FLUSHING PROCEDURE INVERTED HCFC 22 CYLINDER CONTAINS CLEAN HCFC 22 TO BE USED FOR FLUSHING 2 GAUGE MANIFOLD A VAPOR LINE SERVICE VALVE EXISTING INDOOR unit OUTDOOR D CLOSED 3 LIQUID LINE SERVICE VALVE RECOVERY CYLINDER D REC
9. Inches mm and Parts Arrangement 39 40 DISCHARGE AIR 1003 35 50 ELECTRICAL INLETS 902 024 41 1040 030 THROUGH 060 47 1194 SUCTION LINE INLET LIQUID LINE INLET 8 00 203 1 25 SIDE VIEW e ACCESS VIEW UNIT SUPPORT FEET D 16 7 8 26 718 429 683 8 3 4 222 Y 3 3 4 95 3 1 8 30 3 4 4 5 8 79 781 117 BASE WITH ELONGATED LEGS Model Number Identification XC17 036 230 2 Refrigerant Type Minor Revision Number SEE Lo X R 410A Voltage Unit Type 230 208 230V 1ph 60hz er IC OOdHoner Nominal Cooling Capacity 024 2 tons 030 2 5 tons Renee 036 3 tons 042 3 5 tons 048 4 tons 060 5 tons Page 2 506510 01 Typical Unit Parts Arrangement FAN MOTOR CONTROL GROUND LUG PULSE WIDTH MODULATION PWM CONTACTOR 1POLE K1 1 WIRE TIE HIGH VOLTAGE FIELD CONNECTIONS OUTDOOR AMBIENT TEMPERATURE SENSOR CAPACITOR C12 MAIN CONTROL CONTROL BOX FAN MOTOR SURGE PROTECTION HIGH DISCHARGE LINE TEMPERATURE SENSOR COMPRESSOR MUFFLER
10. nai REFRIGERANT LINE SET INSTALLING Line Set Isolation The following illustrations are examples of proper refrigerant line set isolation VERTICAL RUNS NEW CONSTRUCTION SHOWN NOTE Insulate liquid line when it is routed through areas where the surrounding ambient temperature could become higher than the REFRIGERANT LINE SET TRANSITION temperature of the liquid line or when pressure drop is equal to or greater FROM VERTICAL TO HORIZONTAL than 20 psig ANCHORED HEAVY NYLON WIRE TIE OR AUTOMOTIVE AUTOMOTIVE IMPORTANT Refrigerant lines must not contact wall MUFFLER TYPE HANGER MUFFLER TYPE HANGER OUTSIDE WALL VAPOR LINE LIQUID LINE WIRE TIE INSIDE WALL STRAP STRAP LIQUID LINE TO WOOD BLOCK NON CORROSIVE VAPOR LINE BETWEEN IUD O METAL SLEEVE WIRE TIE NON CORROSIVE METAL SLEEVE WOOD BLOCK VAPOR LINE WRAPPED T WIRE TIE IN ARMAFLEX STRAP REFRIGERANT LINE SET INSTALLING HORIZONTAL RUNS To hang line set from joist or rafter use either metal strapping material or anchored heavy nylon wire ties WIRE TIE AROUND VAPOR LINE ONLY VAPOR LINE WRAPPED WITH ARMAFLEX 8 FEET 2 43 METERS pr OUTSIDE WALL STRAPPING MATERIAL AROUND ue VAPOR LINE ONLY i WIRE TIE AA 8 FEET 2 43 METERS PVC CAULK PIPE NON CORROSIVE METAL SLEEVE FIBERGLASS INSULATION TAPE OR STRAP THE VAPOR LINE TO THE JOIST WIRE TIE OR RAFT
11. 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 506510 01 Page 34 Table 8 Sensor Temperature Resistance Range Sensor Outdoor Ambient Temperature Range F C 40 F to 140 F 40 C to 60 C Resistance values range ohms 280 000 to 3750 Pins Wire Color 3 and 4 Black Discharge 35 F to 310 F 41 000 to 103 1 and 2 These LEDs display the most common fault conditions in the system When an abnormal condition is detected t
12. are equipped with an electronic air cleaner designed to remove airborne particles from the air passing through the cleaner If your system is so equipped ask your dealer for maintenance instructions 5 Indoor Unit The indoor unit s evaporator coil is equipped with a drain pan to collect condensate formed 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 installed Thermostat Operation See the ComfortSense 7000 thermostat homeowner manual for instructions on how to operate your thermostat Preservice Check If your system fails to operate check the following before calling for service e Verify room thermostat settings are correct e Verify that all electrical disconnect switches are ON e Check for any blown fuses or tripped circuit breakers e Verify unit access panels are in place e Verify air filter is clean e f service is needed locate and write down the unit model number and have it handy before calling Accessories For update to date information see any of the following publications e Lennox XC17 Engineering Handbook e Lennox Product Catalog e Lennox Price Book A WARNING This product and or the indoor unit it is matched with may contain fiberglass wool Disturbing the insulation during X installation maintenance or repair will expose you to fib
13. compressor operations When if conditions return to normal the alert code is turned off automatically IMPORTANT LED alert codes do provide safety protection The is monitoring function only cannot control shut down other devices Table 9 System LED Alert Codes Outdoor Main Control LEDs Condition Possible Cause s Solution DS11 Green DS14 Red SYSTEM STATUS No power 24V to control terminals R and C or control failure 1 Check control transformer power 24V OFF OFF 2 f power is available to control and LED s do not light replace control Power problem Simultaneous SLOW Unit operating normally or Indicates that control has internal component failure Cycle 24 volt pow Normal operation Flash in standby mode er to control If code does not clear replace control 2 5 Initial power up safety trip SESW anti short cycle end of room thermostat None required Jumper FIELD TEST pins to override delay demand Simultaneous FAST Ambient Sensor Sensor being detected open or shorted or out of temperature range control will revert to time temper Flash Problem ature defrost operation System will still heat or cool Coil Sensor This model does not utilize a coil sensor however this alert indicates either an open or shorted circuit Alternating FAST Flash Problem See if 10K resistor is not damage or missing Resistor is located in th
14. drop tables and procedure 4 Belt Drive Blowers Check belt for wear and proper tension 5 Check all wiring for loose connections 6 Check for correct voltage at unit blower operating 7 Check amperage draw on blower motor Motor Nameplate Actual Indoor Coil 1 Clean coil if necessary 2 Check connecting lines joints and coil for evidence of oil leaks 3 Check condensate line and clean if necessary HOMEOWNER Cleaning of the outdoor unit s coil should be performed by a trained service technician Contact your dealer and set up a schedule preferably twice a year but at least once a year to inspect and service your outdoor unit The following maintenance may be performed by the homeowner CAUTION Physical contact with metal edges and corners while applying excessive force or rapid motion can result in personal injury Be aware of and use caution when working near these areas during installation or while servicing this equipment A IMPORTANT Sprinklers and soaker hoses should not be installed where they could cause prolonged exposure to the outdoor unit by treated water Prolonged exposure of the unit to treated water i e sprinkler systems soakers waste water etc will corrode the surface of steel and aluminum parts and diminish performance and longevity of the unit Page 47 XC17 SERIES Outdoor Coil The outdoor unit must be properly maintained to ensure its proper operation
15. er h LIQUID LINE SERVICE VALVE LIQUID LINE WRAP SERVICE VALVE 5 FLOW NITROGEN NITROGEN To protect components during Flow regulated nitrogen at 1 to 2 psig through the refrigeration brazing wrap a wet cloth around A A gauge set into the valve stem port connection on the liquid line service the liquid line service valve body valve and out of the valve stem port connection on the vapor service and copper tube stub and use valve another wet cloth underneath the valve body to protect the base paint NOTE The fixed orifice or check BRAZE LINE SET expansion valve metering device at the n TN indoor unit will allow low pressure Braze the liquid line to the liquid line USE REGULATOR TO Service valve Turn off nitrogen flow nitrogen to flow through the system FLOW NITROGEN AT 1 TO 2 PSIG N39OHLIN POINT FLAME AWAY FROM cS SERVICE VALVE N 72 a INSTALL SERVICE PORT CAPS ONLY d s After all connections have been brazed disconnect manifold gauge set from service ports cool down piping with wet rag and remove all wrappings Do not reinstall cores until after evacuation procedure Reinstall service port caps if desired to close off refrigerant ports WARNING Allow braze joint to cool before removing the wet SERVICE PORT CORE rag from the service valve TEMPERATURES ABOVE 250 F i CAN DAMAGE VALVE SEALS SERVICE PORT SERVICE PORT CAP
16. injury or death Before attempting to perform any service or maintenance turn the electrical power to unit OFF at disconnect dg switch es Unit may have multiple power supplies 4 WARNING Improper installation adjustment alteration service or maintenance can cause personal injury loss of life or damage to property Installation and service must be performed by a licensed professional installer or equivalent or a service agency DEALER Verifying Fan Motor Operation FAN MOTOR CONTROL AND START UP This motor control is used in controlling motors which employ a Pulse Width Modulation PWM controller A PWM signal will run the fan motor at a revolutions per minute RPM that corresponds to a specific PWM signal VERIFYING JUMPER SETTINGS J2 The unit is shipped from the factory with the default motor RPM setting required for the specific model size Use table 11 for one stage to verify that the jumpers are set correctly for the specific size unit VERIFYING LED STATUS 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 and and RPM indicator are displayed Fan motor speeds are not adjustable for a single stage outdoor unit see table 11 VERIFYING CORRECT DC OUTPUT VOLTAGE J2 The following three methods can be used to determine whether the fan motor is ope
17. it should be energized 24 hours before unit start up to prevent compressor damage as a result of slugging GAUGE SET CONNECTIONS FOR TESTING AND CHARGING B SUCTION LINE SERVICE PORT CONNECTION CHARGE IN LIQUID PHASE REFRIGERANT TANK DIGITAL SCALE D TEMPERATURE 1 Rotate fan to check for binding 2 Inspect all factory and field installed wiring for loose connections 3 After evacuation is complete open both the liquid and vapor line service valves to release the refrigerant charge contained in outdoor unit into the system 4 Replace the stem caps and tighten to the value 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 with the power company and the voltage condition has been corrected 6 Set the thermostat for a cooling demand Turn on power to the indoor indoor unit and close the outdoor unit disconnect switch to start the unit 7 Recheck voltage while the unit is running Power must be within range shown on the nameplate 8 Check system for sufficient refrigerant by using the procedures listed under System Charge System Refrigerant This section outlines procedures for 1 Connecting gauge set for testing and charging 2 Checking and adjusting indoor airflow 3 Adding or removing refrigerant MANIFOLD GAUGE SET LOW HIG
18. n A am erm wes sos 3 8 9 5 mm 3 ounce per 5 85 g per 1 5 m PH PH 554 rua If line length is greater than 15 ft 4 6 m add this amount If 16 line length is less than 15 ft 4 6 m subtract this amount MAX FUSE OR FUSIBLEICOUPE CIRCUT2 15 PER NEC 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 or when pressure drop is equal to or greater than 20 psig NOTE The above nameplate is for illustration purposes only Go to actual nameplate on outdoor unit for charge information FOR OUTDOOR USE Figure 14 Using HFC 410A Weigh In Method Page 28 506510 01 APPROACH TEST AND CHARGE METHOD 65 F 18 3 C and Above If refrigerant added or removed retest to confirm that unit is properly charged If value is greater than shown high approach add refrigerant if less than shown liquid temp too close to ambient temp low approach remove refrigerant APP Approach Values F 1 0 0 6 Models F C 024 030 036 042 048 060 Any 10 5 6 10 5 6 6 3 3 10 5 6 8 4 4 8 4 4 Temperature of air entering outdoor coil These approach values are also listed on the unit charging sticker 580005 01 located on the access panel Confirm proper airflow across coil using Figure 12 Compare unit pre
19. present If no errors are detected then the LED code indicating one or two stage operation will display then a long pause The RPM indicator is displayed next After the RPM indicator is displayed there is a short pause and the sequence repeats if a thermostat demand is still present See Figure 22 for LED sequence of operations See table 13 for description of flash and pause durations Table 12 Error Fault LED Codes Motor Control LED Possible Cause Mismatched RPM Fast Flash with no pause 2 feedback PWM does not match tar CRC Failure Constant ON Microcontroller CRC failure Table 13 Fan Motor Board Unit LED Codes One Stage Operation Low Stage ECM1 Y1 ONLY One slow flash then short pause RPM Indicator NOTE There is a long pause between stage RPM Indicator Appropriate number of flashes See Tables operation and RPM indicator See Tables 1 and 2 11 and 2 for LED RPM indicator Flash Flash Three flashes per second Slow Flash One flash per second Short Pause Two seconds of OFF time Long Pause Five seconds of OFF time DEMAND FAN MOTOR PWM CONTROL ONE STAGE AND BEGINS SINGLE FAN SPEED DEFAULT FAN MOTOR SPEED USED DEFAULT FAN CRC FAILURE MOTOR SPEED REPLACE FAN MOTOR USED y CONTROL BOARD MISMATCHED RPM ECM1 Y1 FAN MOTOR STAGE LED INDICATOR ONE REDE ONLY OR
20. s expected ohm values The Main Control will indicate the sensor as faulty however under this scenario the sensor is not actually faulty e Once the outdoor ambient air temperature has returned to within the sensor s normal operating range the LED alert code will automatically stop Page 31 XC17 SERIES TEST PINS FUNCTION Placing the JUMPER ON the field test pins E33 see Page 22 for location of TEST pins allows the technician to e Clear compressor anti short cycle delay e Clear five strike fault lockouts High Low pressure switches and High Discharge Temperature Sensor Y1 Active Y Place a JUMPER ON the TEST pins for longer than one second2 Then remove jumper and place in JUMPER OFF position Clears any short cycle lockout and five strike fault lockout function if applicable No other functions will be executed and unit will continue in the mode it was operating FACTORY DEFAULT JUMPER SETTING OFF NOTES 1 Placing a JUMPER ON the TEST pins will not bring the unit out of inactive mode The only way manually activate the outdoor unit from an inactive mode is to cycle the 24VAC power to the outdoor unit s Main Control 2 If the jumper remains on the TEST pins for longer than five seconds the Main Control will ignore the JUMPER ON TEST pins and revert to normal operation Figure 18 Clearing Anti Short Cycle Delay and Five Strike Fault Lockouts Page 3
21. unit Perform the following 1 6 TURN Close manifold gauge valves Shutoff HFC 410A cylinder e Reinstall service valve cores by removing manifold hose from service valve Quickly install cores with core tool while maintaining a positive system pressure Replace the stem caps and secure finger tight then tighten an additional one sixth 1 6 of a turn as illustrated Page 18 506510 01 A IMPORTANT Use a thermocouple or thermistor electronic vacuum gauge that is calibrated in microns Use an instrument capable of accurately measuring down to 50 microns 4 WARNING Danger of Equipment Damage Avoid deep vacuum operation Do not use compressors to evacuate a system Extremely low vacuums can cause internal arcing and compressor failure Damage caused by deep vacuum operation will void warranty Evacuating the system of non condensables is critical for proper operation of the unit Non condensables are defined as any gas that will not condense under SWITCH Refer to the unit nameplate for minimum circuit ampacity and maximum fuse or circuit breaker HACR per NEC Install power wiring and properly sized disconnect switch MAIN FUSE BOX BREAKER PANEL 1 SIZE CIRCUIT AND INSTALL DISCONNECT SERVICE DISCONNECT SWITCH NOTE Units are approved for use only with copper conductors Ground unit at disconnect switch or to an earth ground A WARNING temperatures and pressures present during op
22. unit and use a recovery machine to recover any refrigerant left in the indoor coil and line set Perform the following task A Startthe existing HCFC 22 system in the cooling mode and close the liquid line valve B Usethe compressor to pump as much of the existing HCFC 22 refrigerant into the outdoor unit until the outdoor system is full Turn the outdoor unit main power OFF and use a recovery machine to remove the remaining refrigerant from the system NOTE It may be necessary to bypass the low pressure switches if equipped to ensure complete refrigerant evacuation C When the low side system pressures reach 0 psig close the vapor line valve D Check gauges after shutdown to confirm that the valves are not allowing refrigerant to flow back into the low side of the system Page 6 506510 01 CLEARANCE ON ALL SIDES INCHES MILLIMETERS ACCESS PANEL 7 77 NOTES NN 12 305 nnn Dmm ooh LINE SET 36 914 CONNECTIONS MINIMUM CLEARANCE BETWEEN TWO UNITS 24 610 Clearance to of the other three sides must be 36 inches 914mm MINIMUM CLEARANCE ABOVE UNIT 48 1219 Clearance to one of the remaining two sides may be 12 inches 305mm and the final side may be 6 inches 152mm ACCESS PANEL LINE SET CONNECTIONS REAR VIEW OF UNIT Figure 3 Installation Clearances A CAUTION In order
23. 1 Unit 2 Model Number Identification 2 Unit Parts Arrangement 3 Operating Gauge Set and Service Valves 4 Recovering Refrigerant from Existing System 6 New Outdoor Unit Placement 7 Removing and Installing Panels 10 New or Replacement Line Set 11 Flushing the System 14 Leak Testing the System 16 Evacuating the System 16 Electrical 19 Main Control Jumpers and Terminals 22 Field Control 0 24 Servicing Unit Delivered Void of Charge 26 Unit 26 System Refrigerant 26 Operating and Temperature Pressures 30 System Operations 31 Main Control LED Alert Codes 35 Maintenance Dealer and Homeowner 42 Start Up and Performance Checklist 48 Shipping and Packing List Check unit for shipping damage Consult last carrier immediately if damage is found 1 Assembled outdoor unit 1 Bag assembly which includes the following 1 Bushing for low voltage wiring 2 Isolation grommets for liquid and suction lines 506510 01 Unit Dimensions
24. 14 13 12 11 10 Wet bulb F 57 58 59 60 61 62 63 64 65 66 67 68 69 70 2 2 a 1 INDOOR COIL All temperatures are expressed in F Use the following procedure to adjust for optimal air flow across the indoor coil Determine the desired DT Measure entering air temperature using dry bulb A and wet bulb B DT is the intersecting value of A and B in the table see triangle Find temperature drop across coil Measure the coil s dry bulb entering and leaving air temperatures A and C Temperature Drop Formula Tprop A minus C Determine if fan needs adjustment If the difference between the measured and the desired DT Tprop DT is within 3 no adjustment is needed See example below Assume DT 15 and A temp 72 these C temperatures would necessitate stated actions C DT F ACTION 53 19 15 4 Increase the airflow Changing air flow affects all temperatures recheck 58 14 15 1 within 3 range no change temperatures to confirm that the temperature drop DT are within 3 62 10 15 5 Decrease the airflow Adjust the fan speed See indoor unit instructions to increase decrease fan speed Figure 12 Checking Indoor Airflow over Evaporator Coil using Delta T Chart Page 27 XC17 SERIES Use WEIGH IN to initially charge a system when the outdo
25. 2 506510 01 Table 6 Ambient Sensor Temperature Resistance Range Degrees 3 Degrees Degrees Degrees CA En Resistance S AUR Resistance Fe Sch Resistance E fed 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 3 17293 20 5 45560 12 6 128508 127 3 3223 54 6 17616 20 0 46281 13 2 131320 124 7 3407 53 9 17942 19 4 47014 13 9 134227 122 1 3592 53 2 18273 18 9 47759 14 5 137234 119 7 3779 52 5 18607 18 4 48517 15 2 140347 117 5 3968 51 9 18945 17 8 49289 15 9 143571 115 3 4159 51 2 19287 17 3 50074 16 5 146913 113 2 4351 50 5 19633 16 8 50873 17 2 150378 111 2 4544 49 9 19982 16 3 51686 17 9 153974 109 3 4740 49 2 20336 15 7 52514 18 6 157708 107 4 4937 48 5 20695 15 2 53356 19 3 161588 105 6 5136 47 9 21057 14 7 54215 20 1 165624 103 9 5336 47 3 21424 14 1 55089 20 8 169824 102 3 5539 46 6 21795 13 6 55979 21 5 174200 100 6 5743 46 0 22171 13 1 56887 22 3 178762 99 1 5949 45 4 22551 12 5 57811 23 0 183522 97 6 6157 44 7 22936 12 0 58754 23 8 188493 96 1 6367 44 1 23326 11 5 59715 24 6 193691 94 7 6578 43 5 23720 11 0 60694 25 4 199130 93 3 6792 42 9 24120 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 21
26. 43 475 145 Typical pressures only expressed psig liquid 10 and vapor 5 psig indoor match up indoor air quality and indoor load will cause the pressures to vary These operating pressures are also listed on the unit charging sticker 580005 01 located on the access panel Temperature of air entering outdoor coil Table 5 HFC 410A Temperature Fahrenheit Pressure Psig 506510 01 Page 30 System Operation A IMPORTANT Some scroll compressor have internal vacuum protector that will unload scrolls when suction pressure goes below 20 psig A hissing sound will be heard when the compressor is running unloaded Protector will reset when low pressure in system is raised above 40 psig DO NOT REPLACE COMPRESSOR The Main Control provides the following system functions e Compressor anti short cycle delay e High and low pressure switches e AmbientandDischargeLine Temperatures Monitoring and Protection e Five strikes lockout safety feature for High Low Pressure Switches and High Discharge Line Temperature See Figures 19 20 and 21 feature function COMPRESSOR ANTI SHORT CYCLE DELAY The Main Control protects the compressor from e Short cycling five minutes when there is initial power up e Interruption in power to the unit e High or low pressure switch or discharge line sensor trips e Delay after Y1 demand i
27. 7080 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 7890 39 9 26195 7 7 67000 30 4 237941 85 7 8115 39 3 26626 7 2 68128 31 3 245667 84 5 8343 38 7 27063 6 7 69281 32 2 253834 83 4 8573 38 1 27505 6 1 70458 33 2 262482 82 3 8806 37 5 27954 5 6 71661 34 1 271655 81 2 9040 37 0 28408 5 0 72890 35 1 281400 80 1 9277 36 4 28868 4 5 74147 36 1 291774 79 0 9516 35 8 29335 3 9 75431 37 1 302840 78 0 9757 35 2 29808 3 4 76745 38 2 314669 77 0 10001 34 7 30288 2 8 78090 39 2 327343 76 0 10247 34 1 30774 2 3 79465 75 0 10496 33 5 31267 1 7 80873 74 1 10747 33 0 31766 1 2 82314 73 1 11000 32 4 32273 0 6 83790 72 2 11256 31 9 32787 0 0 85302 71 3 11515 31 3 33309 0 5 86852 70 4 11776 30 7 33837 1 1 88440 69 5 12040 30 2 34374 1 7 90068 68 6 12306 29 6 34918 2 2 91738 67 7 12575 29 1 35471 2 8 93452 66 9 12847 28 6 36031 3 4 95211 66 0 13122 28 0 36600 4 0 97016 65 2 13400 27 5 37177 4 6 98870 64 4 13681 26 9 37764 5 2 100775 63 6 13964 26 4 38359 5 7 102733 62 8 14251 25 8 38963 6 3 104746 62 0 14540 25 3 39577 6 9 106817 61 2 14833 24 8 40200 7 5 108948 60 5 15129 242 40833 8 2 111141 59 7 15428 23 7 41476 8 8 113400 59 0 15730 23 2 42130 9 4 115727 58 2 16036 22 6 42794 10 0 118126 57 5 16345 22 1 43468 10 6 120600 Page 33 XC17 SERIES Table 7 High Discharge Sensor Temperature Resistance Range
28. Check all wiring for loose connections Check for correct voltage at unit unit operating 5 Check amperage draw on outdoor fan motor Actual 6 Inspect drain holes in coil compartment base and clean if necessary Motor Nameplate NOTE If insufficient cooling occurs the unit should be gauged and refrigerant charge should be checked Outdoor Coil Clean and inspect outdoor coil may be flushed with a water hose Ensure power is off before cleaning NOTE It may be necessary to flush the outdoor 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 corrosive chemicals such as salts Sea Coast Moist air in ocean locations can carry salt which is corrosive to most metal Units that are located near the ocean require frequent inspections and maintenance These inspections will determine the necessary need to wash the unit including the outdoor coil Consult your installing contractor for proper intervals procedures for your geographic area or service contract Indoor Unit 1 Clean or change filters 2 Lennox blower motors prelubricated permanently sealed No more lubrication is needed 3 Adjust blower speed for cooling Measure the pressure drop over the coil to determine the correct blower CFM Refer to the unit information service manual for pressure
29. ER AT 8 FEET 2 43 METERS INTERVALS THEN STRAP THE LIQUID NOTE Similar installation practices should be used if line set is LINE TO THE VAPOR LINE to be installed on exterior of outside wall FLOOR JOIST OR WARNING Polyol ester POE oils used With HFC 410A ROOF RAFTER 3 refrigerant absorb moisture very quickly Itis very important that the refrigerant system be kept closed as much as possible DO NOT remove line set caps or service valve stub caps until you are ready to make connections Figure 5 Line Set Installation Page 12 506510 01 NOTE Use silver alloy brazing rods with five or six percent minimum silver alloy for copper to copper brazing 45 percent alloy for copper to brass and copper to steel brazing CONNECTIONS CAP AND CORE REMOVAL Remove service cap and core from both the vapor and liquid line Service ports CUT AND DEBUR Cut ends of the refrigerant lines square free from nicks or dents and debur the ends The pipe must remain round and do not pinch end of the line USE REGULATOR TO FLOW NITROGEN AT 1 TO 2 PSIG 3 ATTACHED GAUGES A Connect gauge set low pressure side to liquid line service valve B Connect gauge set center port to bottle of nitrogen with regulator ATTACH SERVICE PORT MUST BE OPEN TO ALLOW EXIT GAUGES POINT FOR NITROGEN VAPOR LINE SERVICE vapor LINE VALVE INDOOR Jb OUTDOOR UNIT UNIT lt
30. H X OUTDOOR UNIT A VAPOR LINE SERVICE VALVE Sa afa TEMPERATURE SENSOR LIQUID LINE LIQUID LINE SENSOR EU z SERVICE VALVE TO LIQUID LINE SERVICE VALVE Close manifold gauge set valves and connect the center hose to a cylinder of HFC 410A Set for liquid phase charging Connect the manifold gauge set s low pressure side to the suction line service port Connect the manifold gauge set s high pressure side to the liquid line service port Position temperature sensor on liquid line near liquid line service port Figure 11 Gauge Set Setup and Connections Page 26 506510 01 ADDING OR REMOVING REFRIGERANT This system uses HFC 410A refrigerant which operates at much higher pressures than HCFC 22 The pre installed liquid line filter drier is approved for use with HFC 410A only Do not replace it with components designed for use with HCFC 22 This unit is NOT approved for use with coils which use capillary tubes or fixed orifices as a refrigerant metering device Check airflow using the Delta T DT process using the illustration in Figure 12 AIRFLOW INDOOR COIL Temperature of air 2 80 2424 24 23 23 22 22 22 20 19 18 17 16 15 entering indoor 78 2323 23 22 22 21 21 20 19 18 17 16 15 14 coil F E 76 2222 22 21 21 2019 19 18 17 16 15 14 13 74 21212120 19 19 18 17 16 16 15 14 13 12 A 72 2020 19 18 17 17 16 515 14 13 12 11 10 70 19 19 18 18 17 17 16 15 15
31. HARNESS HIGH PRESSURE SWITCH D FIELD CONNECTION FOR SUCTION LINE SUCTION LINE SERVICE VALVE PORT SUCTION LINE SERVICE VALVE C L3 Cyc ceo olf 71 ole gt C 2 C 9 C o0 LIQUID LINE SERVICE VALVE PORT VIBRATION ISOLATOR m SLEEVE LOCATIONS DO NOT REMOVE D LIQUID LINE SERVICE VALVE SR1 SOUND DOME FIELD CONNECTION FOR LIQUID LINE SET THERMOSTAT LIQUID LINE FILTER DRIER SINGLE FLOW LOW PRESSURE SWITCH HIGH PRESSURE SWITCH PLUMBING SWITCHES AND SENSOR COMPONENTS Figure 1 Typical Parts Arrangements Page 3 XC17 SERIES CAUTION Physical contact with metal edges and corners while applying excessive force or rapid motion can result in personal injury Be aware of and use caution when working near these areas during installation or while servicing this equipment IMPORTANT The Clean Air Act of 1990 bans the intentional venting of refrigerant CFCs HCFCs AND HFCs as of July 1 1992 Approved methods of recovery recycling or reclaiming must be followed Fines and or incarceration may be levied for noncompliance IMPORTANT This unit must be matched with an indoor coil as specified in Lennox Engineering Handbook Coils previously charged
32. L S Removal and reinstallation of the access panel is as illustrated ACCESS AND LOUVERED A WARNING To prevent personal injury or damage to panels unit or structure be sure to observe the following While installing or servicing this unit carefully stow all removed panels out of the way so that the panels will not cause injury to personnel nor cause damage to ob jects or structures nearby nor will the panels be subjected to damage e g being bent or scratched While handling or stowing the panels consider any weather conditions especially windy conditions that may cause panels to be blown around and battered IMPORTANT Do not allow panels to hang on unit by top tab Tab is for align ment and not designed to support weight of panel PANEL SHOWN SLIGHTLY ROTATED TO ALLOW TOP TAB TO EXIT OR ENTER TOP SLOT FOR REMOVING OR INSTALLING PANEL LOUVERED PANEL REMOVAL Remove the louvered panels as follows 1 Remove two screws allowing the panel to swing open slightly 2 Hold the panel firmly 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 clears the top slot in corner post as illustrated in Detail A LOUVERED PANEL INSTALLATION Position the panel almost parallel with the unit as illustrated in Detail D with the screw side as close to the unit as possible Then
33. LENNOX 2010 Lennox Industries Inc Dallas Texas USA thermostat is included must be ordered separately The Lennox ComfortSense 7000 thermostat may be used as well as other thermostats In all cases setup is critical to ensure proper system operation Field wiring is illustrated in diagrams which begin on Page 19 WARNING Improper installation adjustment alteration service or maintenance can cause personal injury loss of life or damage to property Installation and service must be performed by a licensed professional installer or equivalent or a service agency This single stage outdoor unit is designed for use with HFC 410A refrigerant only This unit must be installed with an approved indoor air handler or coil See the Lennox XC17 Engineering Handbook for approved indoor component matchups A IMPORTANT This model is designed for use in expansion valve systems only An indoor expansion valve approved for use with HFC 410A refrigerant must be ordered separately and installed prior to operating the system 04 10 Page 1 INSTALLATION INSTRUCTIONS Dave Lennox Signature Collection XC17 Units AIR CONDITIONER Technical 506510 01 04 10 Litho U S A Supersedes 506498 01 RETAIN THESE INSTRUCTIONS FOR FUTURE REFERENCE TABLE OF CONTENTS General secet RR eA REA A C 1 Shipping and Packing List
34. N OPEN UNIT INSERT HEX WRENCH HERE STEM CAP TO OUTDOOR CLOSED TO BOTH UNIT INDOOR AND OUTDOOR ANGLE TYPE UNITS TO INDOOR SERVICE VALVE FRONT SEATED CLOSED TO INDOOR UNIT TO OUTDOOR UNIT ANGLE TYPE SERVICE VALVE BACK SEATED OPENED WHEN SERVICE VALVE IS CLOSED THE SERVICE PORT IS OPEN TO THE TO OPEN ROTATE STEM LINE SET AND INDOOR UNIT COUNTERCLOCKWISE 90 BALL SHOWN CLOSED WHEN SERVICE VALVE IS OPEN THE SERVICE PORT IS OPEN TO LINE SET INDOOR AND OUTDOOR UNIT TO CLOSE ROTATE STEM CLOCKWISE 90 VALVE STEM SERVICE PORT SERVICE PORT CORE SERVICE PORT CAP To Access Service Port A service port cap protects the service port core from contamination and TO OUTDOOR UNIT STEM CAP serves as the primary leak seal 1 Remove service port cap with an appropriately sized wrench 2 Connect gauge set to service port 1 6 TURN er NE EE 3 When testing is completed replace service port cap and tighten as fol lows With Torque Wrench Finger tighten and torque cap per Table 1 Without Torque Wrench Finger tighten and use an appropriately sized wrench to turn an additional 1 6 turn clockwise Operating Angle Type Service Valve 1 Remove stem cap with an appropriately sized wrench 2 Use a service wrench with a hex head extension 3 16 for liquid line valve sizes and 5 16 for vapor line valve sizes to back the stem out counterclockwise as far as it will go Operating Ball Type Service Valve 1 Rem
35. ON THEN DOWN TO REMOVE PANEL HOLD DOOR FIRMLY ALONG THE HINGED SIDE TO MAINTAIN __ FULLY ENGAGED TABS mmm ffm CANTA New or Replacement Line Set REFRIGERANT LINE SET This section provides information on installation or replacement of existing line set If new or replacement line set is not being installed then proceed to Brazing Connections on page 13 A IMPORTANT Lennox highly recommends changing line set when converting the existing system from HCFC 22 to HFC 410A f that is not possible and the line set is the proper size as reference in Table 2 use the procedure outlined under Flushing the System on page 13 If refrigerant lines are routed through a wall then seal and isolate the opening so vibration is not transmitted to the building Pay close attention to line set isolation during installation of any HVAC system When properly isolated from building structures walls ceilings floors the refrigerant lines will not create unnecessary vibration and subsequent sounds See Figure 5 for recommended installation practices Also consider the following when placing and installing a high efficiency outdoor unit Liquid lines that meter the refrigerant such as RFC1 liquid lines must not be used in this application Existing line set of proper size as listed in Table 2 may be reused If system was previously charg
36. OVERY MACHINE Inverted HCFC 22 cylinder with clean refrigerant to the vapor service valve HCFC 22 gauge set low side to the liquid line valve HCFC 22 gauge set center port to inlet on the recovery machine with an empty recovery tank to the gauge set Connect recovery tank to recovery machines per machine instructions TYPICAL CHECK EXPANSION VALVE REMOVAL PROCEDURE Uncased Coil Shown STUB END LIQUID LINE ORIFICE E PATCH PLATE CHECK EXPANSION STRIBUTOR VALVE bu TEFLON RING SENSING _ LINE a EQUALIZER LINE LIQUID LINE ASSEMBLY WITH BRASS NUT MALE EQUALIZER ye LINE FITTING VAPOR SENSING BULB LINEN LIQUID LINE On fully cased coils remove the coil access and plumbing panels Remove any shipping clamps holding the liquid line and distributor as sembly Disconnect the equalizer line from the check expansion valve equaliz er line fitting on the vapor line Remove the vapor line sensing bulb Disconnect the liquid line from the check expansion valve at the liquid line assembly Disconnect the check expansion valve from the liquid line orifice hous ing Take care not to twist or damage distributor tubes during this pro cess Remove and discard check expansion valve and the two Teflon rings Use a field provided fitting to temporary reconnect the liquid line to the indoor unit s liquid line orifice housing CAUTION This procedure should not be performed on sy
37. RPM SET PER SLOW FLASH AND ONE OPERATION ph Foris SHORT PAUSE FOR SINGLE E STAGE OR EDA OPERATION EXAMPLE 2 TON UNIT 5 SLOW LED RPM INDICATOR 5 5 AND ONE DEMAND 7 L c 2200005000000 00077 jee LONG PAUSE ENDED Figure 22 Single Stage LED Sequence of Operation Page 43 XC17 SERIES CFM Profile Pin Select FAN MOTOR CONTROL PULSE WIDTH MODULATION PWM 102791 01 Profile Select CONTROL PANEL MAIN CONTROL 2 93 ZA ZW93 LA LOS VERIFY DC VOLTAGE OUTPUT USING FAN PWM OUT AND COM TERMINALS SEE TABLE 11 FOR OPTIMAL DC VOLTAGE BASED ON CFM PROFILE USED OUT PARK COM PWN W uMd 1X3 1 v oo c9 FAN PWM OUT d FAN PWM OUT YELLOW YELLOW PWM FAN CONTROL 5 SEE TABLE 11 FOR PROFILE SELECTION OPTIONS Figure 23 Fan Control Wiring Jumper Settings Testing and LED Location Page 44 506510 01 FAN MOTOR CONTROL PULSE WIDTH MODULATION PWM Variable Speed Motor Control 495102 Rev LEER gt 10 15 2009 102791 01 Profile Select 4 3 2 1 LED1 g r OO OO0 Prom R9 62 EE CONTROL PANEL pn OUT PARK COM FAN PWN BLACK WIRE TS TO MAIN CONTROL EXT PWR R YELLOW WIRE YELLOW YELLOW
38. SSURE SWITCH TRIP WAITING FOR PRESSURE SWITCH TO CLOSED If 5 strike counter has 4 or less strikes when Y1 demand is terminated or satisfied the strike counter will be reset to zero Lockouts can be reset by either cycling power offto the control s R terminal or placing a jumper on the FIELD TEST pins between 1 to2 seconds CLOSED FIVE STRIKES COUNTER REACHES FIVE WITHIN SINGLE Y1 DEMAND HIGH PRESSURE SWITCH LOCKOUT SERVICE LED ALERT CODE REQUIRED WILL DISPLAYED LED ALERT CODE CLEARED SERMCE REQUIRED Figure 19 High Pressure Switch Operation Page 39 HORMAL OPERATION INITIAL TRIP SVVITCH IS IGNORED FOR S0 SECONDS Low COMPRESSOR PRESSURE CONT ACTOR Y1 DEMAHD SWITCH ENERGIZED 506510 01 Low PRESSURE SWITCH OPEH TRIP OPEN TRIP COMPRESSOR CONTACTOR DE ENERGIZED COMPRESSOR ANTI SHORT CYCLE TIMER BEGINS See Note 1 INCREMENT FIVE STRIKE COLINTER See Note 2 LED ALERT CODE WILL DISP LAYED ANTI SHORT CYCLE TIMER ENDS COMPRESSOR CONTACTOR ENERGIZED Low PRESSURE SWITCH OPE H TRIP WAITING FOR PRESSURE SWITCH TO CLOSED CLOSED SWITCH IS CLOSED OR OUTDOOR AMBIENT TEMPERATURE IS 15 F OR BELOVY If S strike counter has 4 or less strikes when Y1 demand is terminated or satisfied the strike counter will be reset to zero Lockouts can be reset by either cycling power offtothe control s R terminal or placing a
39. T EITHER THE 4 OR 8 O CLOCK POSITION NEVER MOUNT ON BOTTOM OF LINE NOTE NEVER MOUNT ON BOTTOM OF LINE 01 FLARE NUT COPPER FLARE SEAL BONNET MALE BRASS EQUALIZER LINE FITTING VAPOR LINE Page 15 XC17 SERIES INSTALLING ISOLATION GROMMETS Locate the isolation grommets provided Slide grommets onto vapor and liquid lines Insert grommets into piping panel to isolate refrigerant lines from sheet metal edges B PIPING PANEL SUCTION LINE Pie 24 2 ME 92 LIQUID LINE TWO ISOLATION GROMMETS ARE PROVIDE FOR THE LIQUID AND SUCTION LINE PIPE PANEL PASS THROUGH REAR VIEW OF UNIT EXTERIOR Figure 6 Isolation Grommets A IMPORTANT The Environmental Protection Agency EPA prohibits the intentional venting of HFC refrigerants during maintenance service repair and disposal of appliance Approved methods of recovery recycling or reclaiming must be followed A IMPORTANT If this unit is being matched with an approved line set or indoor unit coil which was previously charged with mineral oil or if it is being matched with a coil which was manufactured before January of 1999 the coil and line set must be flushed prior to installation Take care to empty all existing traps Polyol ester POE oils are used in Lennox units charged with HFC 410A refrigerant Residual mineral oil can act as an insulator preventing proper heat transfer It can al
40. TION SIZE n D 9 REFER TO COMPRESSOR IN UNIT FOR ACTUAL TERMINAL ARRANGEMENT COMPRESSOR COMFORTSENSE CONTACTOR 57000 A2 THERMOSTAT Lu 7 lt 2 2 SURGE PROTECTOR CRANKCASE HEATER COMPRESSOR LINE VOLTAGE FIELD INSTALLED CLASS II VOLTAGE FIELD WIRING E DENOTES OPTIONAL COMPONENTS COOLING LENNOX CONDENSING XC17 COMPRESSOR Supersedes CONTACTOR 0310 NOTE IF ANY WIRE IN THIS APPLIANCE IS REPLACED IT New Form No MUST BE REPLACED WITH WIRE OF LIKE SIZE 537349 01 RATING INSULATION THICKNESS AND TERMINATION EQUIPMENT GROUND I 2 Q CAPACITOR RED L Litho U S A Figure 7 Typical XC17 Wiring Page 21 XC17 SERIES Main Control Jumpers and Terminals MAIN CONTROL AIR CONDITIONER ONE STAGE TABLE 3 PROVIDES ADDITIONAL INFORMATION CONCERNING JUMPERS LOOP AND CONNECTIONS FOR THE MAIN CONTROL TEST PINS DS11 0514 LED ALERT CODES DS13 and DS15 LED ALERT CODES 6 D D D W1 CUT FOR HUMIDITROL ENHANCED DEHUMIDIFICATION ACCESSORY EDA APPLICATIONS Figure 8 Control Jumpers Loop and Terminals Page 22 506510 01 Board ID Label E21 and E22 LO PS E31 and E32 Y1 OUT E24 and E25 HS PS E30 E33 1 W Y Y L 2 1 DS C Table 3 Main Control Jumpers and Termi
41. cated in the bottom of the control panel Connect conduit to the control panel using a proper conduit fitting 4 ROUTE HIGH VOLTAGE AND GROUND WIRES PIPING PANEL CONTROL PANEL HIGH VOLTAGE GROYND CUG ELECTRICAL INLET CONDUIT HOLE CONTACTOR HIGH VOLTAGE WATERTIGHT CONDUIT FITTING S WIRING ENTRY POINTS WATERTIGHT FLEXIBLE CONDUIT TO SERVICE DISCONNECT BOX ELECTRICAL INLET CONTROL WIRING LOW VOLTAGE USE BUSHING PROVIDED IN BAG ASSEMBLY HERE ACCESS VIEW Page 20 506510 01 RT13 RT28 A 177 AMBIENT DISCHARGE B1 LN waRNING OUTDOOR FAN SENSOR SENSOR COMPRESSOR ELECTRIC SHOCK HAZARD CAN CAUSE INJURY CONTROL OR DEATH UNIT MUST BE GROUNDED IN ACCORDANCE GROUND 5 WITH NATIONAL AND LOCAL CODES EUG CUT ON BOARD LINK FROM DS TO R FOR DEHUMIDIFICATION ON A92 s RT14 SENSOR OUTDOOR TEMP OPTIONAL y HIGH RESISTOR KIT 47W97 IS REQUIRED WHEN USING COMFORTSENSE OO PRESSURE c 7000 Y0349 WITH A175 OUTDOOR CONTROL RESISTOR KIT NOT SWITCH REQUIRED WHEN USING COMFORTSENSE 7000 Y2081 COMPRESSOR METAL JUMPERS ACROSS W1 W2 AND W3 COME FROM FACTORY REMOVE JUMPER W1 TO W2 FOR TWO STAGE ELECTRIC HEAT CONTACTOR AIR HANDLERS ONLY A175 CONTROL C12 NOTE UNITARY CAPACITOR FOR USE WITH COPPER CONDUCTORS ONLY REFER TO UNIT RATING PLATE 009000900 FOR MINIMUM CIRCUIT AMPACITY AND 8 MAXIMUM OVERCURRENT PROTEC
42. d width as outdoor unit Mount barrier 24 inches 610 mm from the sides of the unit in the direction of prevailing winds NOTICE Roof Damage This system contains both refrigerant and oil Some rubber roofing material absorb oil cause the rubber to swell when it comes into contact with oil The rubber will then bubble and could cause leaks Protect the roof surface to avoid exposure to refrigerant and oil during service and installation Failure to follow this notice could result in damage to roof surface Page 8 506510 01 DETAIL A INSTALL UNIT AWAY FROM WINDOWS DETAIL B 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 TWO 90 ELBOWS INSTALLED IN LINE SET WILL REDUCE LINE SET VIBRATION Outside Unit Placement DETAIL C LEG DETAIL 2 50 8MM SCH 40 FEMALE THREADED ADAPTER 2 50 8MM SCH 40 MALE THREADED ADAPTER Use additional 2 SCH 40 male threaded adapters which can be threaded into the female threaded adapters to make additional adjustments to the level of the unit Elevated Slab Mounting using Feet Extenders mM BUILDING STRUCTURE E MOUNTING E p GROUND LEVEL s
43. e Please contact your dealer to schedule proper inspection and maintenance for your equipment e Make sure no obstructions restrict airflow to the outdoor unit e Grass clippings leaves or shrubs crowding the unit can cause the unit to work harder and use more energy e Keep shrubbery trimmed away from the unit and periodically check for debris which collects around the unit Routine Maintenance In order to ensure peak performance your system must be properly maintained Clogged filters and blocked airflow prevent your unit from operating at its most efficient level 1 Air Filter Ask your Lennox dealer to show you where your indoor unit s filter is located It will be either at the indoor unit installed internal or external to the cabinet or behind a return air grille in the wall or ceiling Check the filter monthly and clean or replace it as needed 2 Disposable Filter Disposable filters should be replaced with a filter of the same type and size NOTE If you are unsure about the filter required for your system call your Lennox dealer for assistance 3 Reusable Filter Many indoor units are equipped with reusable foam filters Clean foam filters with a mild soap and water solution rinse thoroughly allow filter to dry completely before returning it to the unit or grille NOTE The filter and all access panels must be in place any time the unit is in operation 4 Electronic Air Cleaner Some systems
44. e sensor harness assembly brown lead Main Control Indicates that control has internal component failure Cycle 24 volt power to control If code does not ON ON Board Failure clear replace control Page 35 XC17 SERIES Outdoor Main Control LEDs DS11 Green DS14 Red 1 Fast Flash then Pause Condition Heating Low Capacity 2 Fast Flash then Pause Heating High Capacity 2 Fast Flash then Pause ON Defrost 1 Fast Flash then Pause OFF Cooling Low Capacity 2 Fast Flash then Pause Cooling High Capacity 2 Fast Flash then Pause Dehumidification Mode Possible Cause s These are codes that show status of operation whether in low stage or high stage heating or cooling defrost or in the EDA mode Low Pressure Fault Low Pressure Switch Lockout High Pressure Fault High Pressure Discharge Sensor Lockout ALERT STATUS 1 Restricted air flow over indoor or outdoor coil 2 mproper refrigerant charge in system 3 Improper metering de vice installed or incorrect operation of metering de vice 4 Incorrect or improper sensor location or con nection to system 1 Remove any blockages or restrictions from coils and or fans Check indoor and outdoor fan motor for proper current draws 2 Check system charge using approach and subcooling temperatures 3 Check system operating pressures and compare to unit charging charts
45. eat the leak testing procedure NOTE The term absolute pressure means the total actual pressure within a given volume or system above the absolute zero of pressure Absolute pressure in a vacuum is equal to atmospheric pressure minus vacuum pressure C Whenthe absolute pressure reaches 23 000 microns 29 01 inches of mercury close the manifold gauge valves turn off the vacuum pump and disconnect the manifold gauge center port hose from vacuum pump Attach the manifold center port hose to a dry nitrogen cylinder with pressure regulator set to 150 psig 1034 kPa and purge the hose Open the manifold gauge valves to break the vacuum in the line set and indoor unit Close the manifold gauge valves Shut off the dry nitrogen cylinder and remove the manifold gauge hose from the cylinder Open the manifold gauge valves to release the dry nitrogen from the line set and indoor unit Reconnect the manifold gauge to the vacuum pump turn the pump on and continue to evacuate the line set 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 When the absolute pressure requirement above has been met disconnect the manifold hose from the vacuum pump and connect it to an upright cylinder of HFC 410A refrigerant Open the manifold gauge valve 1 to 2 psig in order to release the vacuum in the line set and indoor
46. ed with HCFC 22 refrigerant then existing line set must be flushed see Flushing the System on page 14 Field refrigerant piping consists of liquid and vapor lines from the outdoor unit to the indoor unit coil braze connections Use Lennox L15 sweat non flare series line set or field fabricated refrigerant line sizes as listed in Table 2 Table 2 Refrigerant Line Set Inches mm Field Connections RecommendedLine Set L15 Line Sets Feet Meters Liquid Vapor Liquid Vapor Line Line Line Line 3 8 3 4 3 8 3 4 L15 41 10 19 10 19 15 50 5 15 3 8 7 8 3 8 7 8 10 22 10 22 L15 65 se ze 15 50 6 15 xs 00 G2 o Q2 3 8 1 1 8 3 8 1 1 8 060 10 29 10 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 Piping Design and Fabrication Guidelines CORP 9351 L9 or contact Lennox Technical Support Product Applications for assistance A IMPORTANT Mineral oils are not compatible with HFC 410A If oil must be added it must be a Polyol ester oil The compressor is charged with sufficient Polyol ester oil for line set lengths up to 50 feet If line set lengths longer than 50 feet will be required all one 1 ounce of oil for every additional 10 feet of line set D
47. eration of an air conditioning system Non condensables and water suction combine with refrigerant to produce substances that corrode copper piping and compressor parts In the U S A wiring must conform with current local codes and the current National Electric Code NEC In Canada wiring must conform with current local codes and the current Canadian Electrical Code CEC Refer to the furnace or air handler installation instructions for additional wiring application diagrams and refer to unit nameplate 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 INSTALL THERMOSTAT Install room thermostat ordered separately on an inside wall approximately in the center of the conditioned area and 5 feet 1 5m from the floor It should not be installed on an outside wall or where it can be affected by sunlight or drafts THERMOSTAT NOTE 24VAC Class II circuit connections are made in the control panel Electric Shock Hazard Can cause injury or death Unit must be grounded in accordance with national and local codes Line voltage is present at all components when unit is not in operation on units with single pole contactors Disconnect all remote electric power supplies before opening access panel Unit may have multiple power supplies CAUTION Electrostatic discharge can af
48. erglass wool dust Breathing this may cause lung cancer Fiberglass wool is known to the State of California to cause cancer Fiberglass wool may also cause respiratory skin and eye irritation To reduce exposure to this substance or for further information consult material safety data sheets available from address shown below or contact your supervisor Lennox Industries Inc P O Box 799900 Dallas TX 75379 9900 XC17 Start Up and Performance Checklist Customer Address Indoor Unit Model Outdoor Unit Model Notes Serial Serial START UP CHECKS Refrigerant Type _ Rated Load Amps Condenser Fan Full Load Amps COOLING MODE Actual Amps Rated Volts Actual Volts Actual Amps Page 48 506510 01 XC17 Start Up and Performance Checklist Suction Pressure Liquid Pressure Supply Air Temperature Ambient Temperature Return Air Temperature System Refrigerant Charge Refer to manufacturer s information on unit or installation instructions for required subcooling and approach temperatures Subcooling A B SUBCOOLING Saturated Condensing Temperature A minus Liquid Line Temperature B Approach APPROACH Liquid Line Temperature A minus Outdoor Air Temperature B Indoor Coil Temperature Drop 18 to 22 F COIL TEMP DROP Return Air Temperature A minus Supply Air Temperature B Page 49 XC17 SERIES
49. f outdoor ambient temperature sensor is illustrated on Page 3 COIL TEMPERATURE SENSOR This model does not use a coil temperature sensor The cable assembly attached to the Main Control s E30 connection has a 10K resister installed between pins 5 and 6 as illustrated in Figure 17 No alerts or alarms would be generated if resistor is damage Ambient Air Temperature Sensor 10K resistor 8 cy 12 col High Discharge Line Temperature Sensor Figure 17 10k Resistor Location TESTING AMBIENT AND HIGH DISCHARGE LINE TEMPERATURE SENSORS Sensors connect through a field replaceable harness assembly that plugs directly into the Main Control Through these sensors the Main Control can monitor outdoor ambient and discharge line temperature fault conditions As the detected temperature changes the resistance across the sensor changes Figures 6 and 7 lists how the resistance varies as the temperature changes for both type of sensors Sensor resistance values can be checked by ohming across pins shown in Table 8 When a sensor indicates a resistance value that is not within the range as listed in Table 8 then the following condition may be present e Sensor detects an out of range outdoor ambient air temperature condition and will display LED alert code on the Main Control e sensor is operating normally when the ambient air temperature at the sensor is below or above the Main Control
50. fect electronic components Take precautions during unit installation and service to protect the unit s electronic controls Precautions will help to avoid control exposure to electrostatic discharge by putting the unit the control and the technician at the same electrostatic potential Neutralize electrostatic charge by touching hand and all tools on an unpainted unit surface before performing any service procedure ELECTROSTATIC DISCHARGE ESD Precautions and Procedures Page 19 XC17 SERIES ROUTE CONTROL WIRES Install low voltage control wiring from outdoor to indoor unit and from thermostat to indoor unit as illustrated See Figures 10 and 10 for typical configurations A Run 24VAC control wires through hole with grommet CONTROL PANEL B 24VAC control wire connections to Main Control NOTE Do not bundle any excess 24VAC control wires inside control panel NOTE Wire tie provides low voltage wire strain relief and to maintain e separation of field installed low and high voltage circuits NOTE For proper voltages select thermostat wire control wires gauge per table below MAIN CONTROL WIRE RUN LENGTH AWG INSULATION TYPE LESS THAN 100 30 METERS 18 TEMPERATURE RATING MORE THAN 100 30 METERS 16 35 C MINIMUM Any excess high voltage field wiring should be trimmed and secured away from any low voltage field wiring To facilitate a conduit a cutout is lo
51. gerant to the center port of the manifold gauge set NOTE Later in the procedure the HFC 410A container will be replaced by the nitrogen container OUTDOOR UNI VAPOR SERVICE VALVE t TO VAPOR SERVICE VALVE NITROGEN HFC 410A LIQUID LINE SERVICE VALVE TEST FOR LEAKS After the line set has been connected to the indoor unit and air conditioner check the line set connections and indoor unit for leaks Use the following procedure to test for leaks A With both manifold valves closed connect the cylinder of HFC 410A refrigerant to the center port of the manifold gauge set Open the valve on the HFC 410A cylinder vapor only Open the high pressure side of the manifold to allow HFC 410A into the line set and indoor unit Weigh in a trace amount of HFC 410A A trace amount is a maximum of two ounces 57 g refrigerant or three pounds 31 kPa pressure Close the valve on the HFC 410A cylinder and the valve on the high pressure side of the manifold gauge set Disconnect the HFC 410A cylinder Connect a cylinder of dry nitrogen with a pressure regulating valve to the center port of the manifold gauge set Adjust dry nitrogen pressure to 150 psig 1034 kPa Open the valve on the high side of the manifold gauge set in order to pressurize the line set and the indoor unit After a few minutes open one of the service valve ports and verify that the refrigerant added to
52. his function communicates the specific condition through LEDs The diagnostic function is capable of detecting both mechanical and electrical system abnormal conditions Yellow RESETTING LED ALERT CODES LED alert codes can be reset either manually or automatically 37 C to 154 C Note Sensor resistance decreases as sensed temperature increases see Figures 6 and 7 1 Manual Reset Manual reset can be achieve by one of the following methods Main Control LED Alert Codes Main Control LED alert codes simply referred to as LED alert codes are located on the Main Control and marked with the following identification DS11 AND DS14 LED SYSTEM AND ALERT CODES DS11 Green and DS14 Red LEDs indicate diagnostics 2 conditions that are listed in Table 9 These LEDs display fault conditions in system cooling After power up existing code will display for 60 capacity dehumidification mode anti short cycle lockout seconds and then clear high and low pressures discharge line temperature 2 Automatic Reset outdoor temperature and discharge sensor failures DS15 AND DS13 LED COMPRESSOR ALERT CODES DS15 Yellow and DS13 Red LEDs indicate diagnostics conditions that are listed in Table 9 e Disconnect R wire from the Main Control s R terminal Turning main power OFF and then ON at the unit s disconnect switch After an alert is detected the Main Control continues to monitor the units system and
53. in a continuous motion Slightly rotate and guide the lip of top tab inward as illustrated in Detail A and C then upward into the top slot of the hinge corner post Rotate panel to vertical to fully engage all tabs Holding the panel s hinged side firmly in place close the right hand side of the pan el aligning the screw holes When panel is correctly positioned and aligned insert the screws and tighten Detail C MAINTAIN MINIMUM PANEL ANGLE AS CLOSE TO PARALLEL WITH THE UNIT AS POSSIBLE WHILE INSTALLING PANEL Detail D ANGLE MAY BE PREFERRED ANGLE FOR INSTALLATION IMPORTANT To help stabilize an outdoor unit some installations may require strapping the unit to the pad using brackets and anchors commonly available in the marketplace Page 10 506510 01 Detail B REMOVE 4 SCREWS TO REMOVE PANEL FOR ACCESSING COMPRESSOR AND CONTROLS POSITION PANEL WITH HOLES ALIGNED INSTALL SCREWS AND TIGHTEN Detail A Jr r3 mE E 12 LVV 1 T CY Y Y FANN LIYE nr DN A DAY PE NN AAT DAY lt ROTATE IN THIS DIRECTI
54. jumper on the FIELD TEST pins between 1 to 2 seconds FIVE STRIKES COUNTER REACHES FIVE WITHIN SINGLE Y1 DEMAND LOW PRESSURE SWATCH LOCKOUT SERVICE LED ALERT CODE REQUIRED WILL DISPLAYED NORMAL LED ALERT CODE OPERATION CLEARED SERMCE RE QUIRED Figure 20 Low Pressure Switch Operation Page 40 Y1 DEMAHD IGH DIS CHA RGE LIN TEMPERATURE COMPRESSOR CONTACTOR ENERGIZED HIGH DISCHARGE LINE TEMPERATURE COMP RESSOR CONTACTOR DE ENERGIZED COMPRESSOR ANTI SHORT CYCLE TIMER BEGINS See Note 1 INCRE ME NT FIVE STRIKE COUNTER See Note 2 LED ALERT CODE WILL DISPLAYED ANTI SHORT CYCLE TIMER ENDS IF TEMPERATURE IS AT OR ABOVE 279 F If 5 strike courter has 4 or less strikes when Y1 demand is terminated or satisfied the strike counter will be reset to zero Lockouts can be reset by either cycling power offto the control s R terminal or placing a jumper on the FIELD TEST pins between 1 to 2 seconds FIVE STRIKES COUNTER REACHES FIVE WITHIN SINGLE Y1 DEMAND HIGH DISCHARGE LINE TEMPERATURE LOCKOUT LED ALERT CODE WILL DISPLAYED SERMCE REQUIRED COMPRESSOR LINE TEMPERATURE IS AT OR BELOVY WAIT FOR TEMPERATURE DROP TO OR BELOW 225 F CONT ACTOR ENERGIZED LED ALERT CODE CLEARED HORMAL OPERATION Figure 21 High Discharge Temperature Sensor Operation Page 41 XC17 SERIES Maintenance A WARNING Electric shock hazard Can cause
55. nals First Stage and second stage basic and precision dehumidification ECM fan motor 24VDC out put connection 1 Second stage basic and precision dehumidification ECM fan motor 24VDC output connection 2 ECM common connection for ECM fan DIS 5 Discharge line temperature sensor supply DIS 6 Discharge line temperature sensor return Range is 35 F to 310 F Sensor is clipped on a 1 2 copper tube AMB 3 Outdoor ambient temperature sensor supply AMB 4 Outdoor ambient temperature return Range is 40 F to 140 F COIL 1 Outdoor coil temperature sensor supply COIL 2 Outdoor coil temperature sensor return This model does not utilize a coil sensor The cable harness assembly for the sensors Six position square pin header E30 provides connections for the temperature sensors DIS YELLOW Pins 5 and 6 AMB BLACK Pins 3 and 4 COIL BROWN Pins 5 and 6 incorporates a built in 10K resistor between pins 5 and 6 This jumper allows service personnel to defeat the timed off control and field programming of unit capacity feature Placing a jumper across both pins on E33 will terminate the anti short delay It will also clear lockout alarms Short DS ToR Cut for Humiditrol Enhanced Dehumidification Accessory EDA applications Factory default setting Page 23 XC17 SERIES Field Control Wiring ComfortSense 7000 Thermostats One Stage Air Handler Control Catalog Y0349 or Y2081 Air Condi
56. nformation The check expansion valve unit can be installed internal or external to the indoor coil In applications where an uncased coil is being installed in a field provided plenum install the check expansion valve in a manner that will provide access for field servicing of the check expansion valve Refer to below illustration for reference during installation of check expansion 1 2 TURN TWO PIECE PATCH PLATE UNCASED COIL ONLY Uncased Coil Shown LIQUID LINE STUB ORIFICE END CHECK HOUSING valve unit DISTRIBUTOR TUBES 2 TEFLON RING EXPANSION N VALVE i Mo ose SENSING LINE EQUALIZER LINE LIQUID LINE ASSEMBLY WITH BRASS NUT MALE EQUALIZER LINE FITTING SEE EQUALIZER LINE INSTALLATION FOR FURTHER DETAILS N LIQUID LINE SENSING BULB INSULATION IS REQUIRED IF MOUNTED EXTERNAL TO THE COIL CASING SENSING BULB INSTALLATION FOR BULB POSITIONING SENSING BULB INSTALLATION A Attach the vapor line sensing bulb in the proper orientation as illustrated to the right using the clamp and screws pro vided NOTE Confirm proper thermal contact between vapor line and check expansion bulb before insulating the sensing bulb once installed B Connectthe equalizer line from the check expansion valve to the equalizer vapor port on the vapor line Finger tighten the flare nut plus 1 8 turn 7 ft lbs as illus trated below EQUALIZER LINE INSTALLATION A Remove and disca
57. o not add any more than seven 7 ounces of oil Recommended topping off POE oils are Mobil EAL ARCTIC 22 CC or ICI EMKARATE RL32CF To obtain the correct information from Lennox be sure to communicate the following information Model XC17 and size of unit e g 036 e Line set diameters for the unit being installed as listed in Table 2 and total length of installation e Number of elbows vertical rise or drop in the piping A WARNING Danger of fire Bleeding the refrigerant charge from only the high side may result in the low side shell and suction tubing being pressurized Application of brazing torch while pressurized may result in ignition of the refrigerant and oil mixture check the high and low pressures before unbrazing A WARNING When using a high pressure gas such as dry nitrogen to pressurize a refrigeration or air conditioning system use a regulator that can control the pressure down to 1 or 2 psig 6 9 to 13 8 kPa CAUTION Brazing alloys and flux contain materials which are hazardous to your health Avoid breathing vapors or fumes from brazing operations Perform 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 Page 11 XC17 SERIES S IMPORTANT Refrigerant lines must not contact structure INSTALLATION
58. o the recessed portion of the feet Use additional 2 inch 50 8mm Schedule 40 male threaded adaptors which can be threaded into the female threaded adaptors to make additional adjustments to the level of the unit NOTE Keep the height of extenders short enough to ensure a sturdy installation If it is necessary to extend further consider a different type of field fabricated framework that is sturdy enough for greater heights STABILIZING UNIT ON UNEVEN SURFACES A IMPORTANT Unit Stabilizer Bracket Use field provided Always use stabilizers when unit is raised above the factory height Elevated units could become unstable in gusty wind conditions Stabilizers may be used on factory height units when mounted on unstable an uneven surface With unit positioned at installation site perform the following 1 Remove two side louvered panels to expose the unit base 2 Install the brackets as illustrated in Figure 4 Detail D using conventional practices 3 Replace the panels after installation is complete ROOF MOUNTING Install the unit a minimum of 6 inches 152 mm above the roof surface to avoid ice build up around the unit Locate the unit 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 barrier should be constructed Size barrier at least the same height an
59. or after power reset 2 Flashes then Pause System Pressure Trip Indicates the compressor protector is open or missing supply power to the compressor 1 High head pressure e Check high pressure switch if present in system e Check if system is overcharged with refrigerant e Check for non condensable in system 2 Condenser coil poor air circulation dirty blocked damaged 3 Condenser fan is not running e Check fan capacitor e Check fan wiring and connectors e Check fan motor for failure or blockage Return air duct has substantial leakage Clears after four consecutive normal compressor run cycles or after power reset 3 Flashes then Pause Short Cycling Compressor is running less than three minutes 1 Thermostat demand signal is intermittent 2 Time delay relay or Main Control is defective 3 f high pressure switch is present see Flash Code 2 information Clears after four consecutive normal compressor run cycles or after power reset 4 Flashes then Pause Locked Rotor Compressor has a locked out due to run capacitor short bearings are seized ex cessive liquid re frigerant 1 Run capacitor has failed 2 Low line voltage contact utility if voltage at disconnect is low e Check wiring connections 3 Excessive liquid refrigerant in the compressor Compressor bearings are seized Page 37 Clears after power reset or four normal compressor cycle
60. or unit is void of charge To verify charge and add or remove refrigerant use either APPROACH or SUBCOOLING methods START Determine the correct charge method WHEN TO CHARGE e Warm weather best TXV charge in colder weather CHARGE METHOD Determine by e Outdoor ambient temperature REQUIREMENTS 18 3 C and 17 7 C and e Sufficient heat load in structure Above Below e Indoor temperature between 70 80 F 21 26 e Manifold gauge set connected to unit Thermometers measure outdoor ambient temperature APPROACH OR WEIGH IN to measure liquid line temperature SUBCOOLING measure suction line temperature 65 F 64 F Figure 13 Determining Charge Method WEIGH IN CHARGING METHOD 64 F 17 7 C and Below CALCULATING SYSTEM CHARGE FOR OUTDOOR UNIT VOID OF CHARGE If the system is void of refrigerant first locate and repair any leaks and then weigh in the refrigerant charge into the unit To calculate the total refrigerant charge Adjust amount for variation Amount specified on in line set length listed on nameplate line set length table below Total charge LENNOX DALLAS TEXAS Refrigerant Charge per Line Set Length M N TSAO0S36H4N41G S N PPYYMNNNNN A CONTAINS HFC 4104 DESIGN PRESSURE Liquid Line Ounces per 5 feet 9 1 5 m FACTORY CHARGE adjust from 15 feet 4 6 m line set 8 LBS 9 Ozs LO 236 PSIG Set Diameter ELECTRICAL RAT ING NOMINAL VOLTS 460
61. ove stem cap with an appropriately sized wrench 2 Use an appropriately sized wrenched to open To open valve rotate stem counterclockwise 90 To close rotate stem clockwise 90 Reinstall Stem Cap Stem cap protects the valve stem from damage and serves as the primary seal Replace the stem cap and tighten as follows 1 6 TURN e With Torque Wrench Finger tighten and then torque cap per Table 1 Without Torque Wrench Finger tighten and use an appropriately sized wrench to turn an additional 1 12 turn clockwise NOTE A label with specific torque requirements may be affixed to the stem cap If the label is present use the specified torque Figure 2 Angle and Ball Service Valves Page 5 XC17 SERIES Recovering Refrigerant from Existing System RECOVERING REFRIGERANT FROM SYSTEM Disconnect all power to the existing outdoor unit at the disconnect Connect a gauge set clean recovery cylinder and a recovery Switch or main fuse box breaker panel machine to the service ports of the existing unit Use the instructions provided with the recovery machine to make the connections POWER 2 MANIFOLD GAUGE SET MAIN FUSE BOX BREAKER PANEL MANIFOLD GAUGES SERVICE DISCONNECT RECOVERY MACHINE SWITCH CLEAN RECOVERY OUTDOOR UNIT CYLINDER 2 REFRIGERANT Remove existing HCFC 22 refrigerant using one of the following procedures IMPORTANT Some system configurations may contain higher
62. r the cap before tightening Table 1 Torque Requirements Parts Recommended Torque Service valve cap 8 ft Ib 11 NM Sheet metal screws 16 in Ib 2 NM Machine screws 10 28 in Ib 3 NM Compressor bolts 90 in Ib 10 NM Gauge port seal cap 8ft Ib 11 NM USING MANIFOLD GAUGE SET When checking the system charge only use a manifold gauge set that features low loss anti blow back fittings Manifold gauge set used with HFC 410A refrigerant systems must be capable of handling the higher system operating pressures The gauges should be rated for use with pressures of 0 800 psig on the high side and a low side of 30 vacuum to 250 psig with dampened speed to 500 psi Gauge hoses must be rated for use at up to 800 psig of pressure with a 4000 psig burst rating OPERATING SERVICE VALVES The liquid and vapor line service valves are used for removing refrigerant flushing leak testing evacuating checking charge and charging Each valve is equipped with a service port which has a factory installed valve stem Figure 2 provides information on how to access and operating both angle and ball service valves Page 4 506510 01 SERVICE VALVES S VARIOUS TYPES SERVICE PORT P ics D CORE 5 8 VALVE STEM SHOWN OPEN TO BOTH INDOOR AND CLOSED INSERT HEX OUTDOOR UNITS SERVICE PORT CAP VALVE STEM FRONT SEATED SERVICE PORT ir SERVICE PORT VALVE STEM TO INDOOR SHOW
63. rating at the correct RPMs based on unit size 1 Use the information provided in tables 11 to verify that all four jumper terminals are set correctly for the specific size unit 2 Verify LED RPM indicator is displaying the correct flash sequence for the applicable size unit see Table 11 3 Test DC voltage output on the Motor Control s J2 terminals see Figure 23 while under full load and verify the voltage read to the voltage listed in Table 11 for the applicable size unit 4 If no voltage is detected at the J2 terminals verify there is a Y1 demand at the thermostat and 24V present at the Fan Control s EXT PWRIR terminal during that Y1 demand see Figure 24 5 If 24V is present at the Fan Control EXT PWR R terminal during a Y1 thermostat demand and no voltage is present at the J2 terminals then Fan Control should be replaced Table 11 One Stage Motor Control RPM Jumper Settings LED RPM Indicator and P2 DC Voltage Outputs LED Code XP XC 17 048 060 ECM1 Y1 One Stage and EDA Operation 1 RPM J2 DC Volt CFM Profile Pin Select XP XC17 036 042 XP XC17 030 XP XC17 024 9 OFF OFF OFF 8 OFF OFF ON 6 OFF ON ON 5 OFF ON ON LED Code indicates Fan Control LED flash sequence For example LED Code 9 indicates 9 slow flashes and pause Page 42 506510 01 LED CODES AND SEQUENCE OF OPERATIONS During start up the LED will first display any error conditions see table 12 if
64. rd either the flare seal cap or flare nut with copper flare seal bonnet from the equalizer line port on the vapor line as illustrated in the figure to the right Remove and discard either the flare seal cap or flare nut with copper flare seal bonnet from the equalizer line port on the vapor line as illustrated in the figure to the right 1 8 TURN A FLARE SEAL CAP Remove the field provided fitting that temporary reconnected the liquid line to the indoor unit s distributor assembly Install one of the provided Teflon rings around the stubbed end of the check expansion valve and lightly lubricate the connector threads and expose surface of the Teflon ring with refrigerant oil Attach the stubbed end of the check expansion valve to the liquid line orifice housing Finger tighten and use an appropriately sized wrench to turn an additional 1 2 turn clockwise as illustrated in the figure above or 20 ft lb Place the remaining Teflon washer around the other end of the check expansion valve Lightly lubricate connector threads and expose sur face of the Teflon ring with refrigerant oil Attach the liquid line assembly to the check expansion valve Finger tighten and use an appropriately sized wrench to turn an additional 1 2 turn clockwise as illustrated in the figure above or 20 ft lb ON LINES SMALLER THAN 7 8 MOUNT SENSING BULB AT EITHER THE 3 OR 9 O CLOCK POSITION VAPOR LINE ON 7 8 AND LARGER LINES MOUNT SENSING BULB A
65. s XC17 SERIES Outdoor Main Control LEDs DS15 DS13 Yellow Red 5 Flashes then Pause Condition Open Circuit Possible Cause s Compressor has an open circuit due to power dis connection fuse is open or other similar conditions Solution 1 Outdoor unit power disconnect is open 2 Unit circuit breaker or fuse s is open 3 Unit contactor has failed to close e Check compressor contactor wiring and con nectors Check for compressor contactor failure burned pitted or open Check wiring and connectors between supply and compressor Check for low pilot voltage at compressor con tactor coil 4 High pressure switch is open and requires manual reset 5 Open circuit in compressor supply wiring or con nections 6 Unusually long compressor protector reset time due to extreme ambient temperature 7 Compressor windings are damaged e Check compressor motor winding resistance Clearing Status Clears after one normal compressor run cycle or power reset 6 Flashes then Pause Open Start Circuit Current not sensed by Start transformer 1 Run capacitor has failed 2 Open circuit in compressor start wiring or connec tions e Check wiring and connectors between supply and the compressor S terminal 3 Compressor start winding is damaged e Check compressor motor winding resistance Clears when amperage is detected in RUN and START sensors or after power reset 7 Flashe
66. s tems which contain contaminants Example compressor burn out FLUSHING LINE SET The line set and indoor unit coil must be flushed with at least the same amount of clean refrigerant that previously charged the sys tem Check the charge in the flushing cylinder before proceeding A Settherecovery machine for liquid recovery and start the recov ery machine Open the gauge set valves to allow the recovery machine to pull a vacuum on the existing system line set and in door unit coil Invert the cylinder of clean HCFC 22 and open its valve to allow liquid refrigerant to flow into the system through the vapor line valve Allow the refrigerant to pass from the cylinder and through the line set and the indoor unit coil before it enters the recovery machine After all of the liquid refrigerant has been recovered switch the recovery machine to vapor recovery so that all of the HCFC 22 vapor is recovered Allow the recovery machine to pull down to 0 the system Close the valve on the inverted HCFC 22 drum and the gauge set valves Pump the remaining refrigerant out of the recovery machine and turn the machine off Page 14 506510 01 FLUSHING LINE SET AND INDOOR COIL 2 OF 2 4 TYPICAL CHECK EXPANSION VALVE INSTALLATION PROCEDURE This outdoor unit is designed for use in systems that use check expansion valve metering device See the Lennox XC17 Engineering Handbook for approved check expansion valve kit match ups and application i
67. s then Pause Open Run Circuit Current not sensed by run transformer 1 Open circuit in compressor start wiring or connections e Check wiring and connectors between supply the compressor R terminal 2 Compressor start winding is damaged e Check compressor motor winding resistance Clears when amperage is detected in RUN and START sensors or after power reset 8 Flashes then Pause Welded Contactor Compressor always runs 1 Compressor contactor failed to open 2 Thermostat demand signal not connected to module Clears after one normal compressor run cycle or after power reset 9 Flashes then Pause Secondary Low Voltage 24VAC is below 18VAC 1 Control circuit transformer is overloaded 2 Low line voltage contact utility if voltage at disconnect is low e Check wiring connections Clears after voltage is higher than 20VAC for two seconds or after power reset Fast simultaneous flashing of DS11 DS13 DS14 and DS15 506510 01 Factory Test Mode Page 38 Y1 DEMAHD HIGH PRESSURE SWITCH CLOSED COMPRESSOR CONT ACTOR ENERGIZED HIGH PRESSURE SWITCH TRIP OPEH TRIP COMPRESSOR CONTACTOR DE ENERGIZED COMPRESSOR ANTI SHORT CYCLE TIMER BEGINS See Note 1 INCREMENT FIVE STRIKE COLINTER See Note 2 LED ALERT CODE WILL DISPLAYED ANTI SHORT CYCLE TIMER ENDS COMPRESSOR CONTACTOR ENERGIZED HIGH PRE
68. s removed The anti short timer in the outdoor control is 5 minutes To override timer when active or inactive place jumper on the field test pins between 1 and 2 seconds Resetting Anti Short Cycle Delay The FIELD TEST pins E33 on the Main Control can be jumpered between 1 to 2 seconds to bypass delay HIGH AND LOW PRESSURE SWITCHES The unit s reset pressure switches LO PS 54 and HI PS S87 are factory wired into the Main Control on the LO PS and HI PS terminals there locations are illustrated on Page 3 Sequence of operations for both pressure switches are provided in Figures 19 and 20 HIGH DISCHARGE LINE TEMPERATURE SENSOR RT28 The high discharge line temperature sensor location is illustrated on Page 3 This sensors sequence of operations is provided in Figure 21 High Discharge Line Sensor Open Shorted Event Condition Discharge sensor open short fault is ignored during initial 90 seconds of compressor run time After that if discharge temperature sensor is detected open or short the control will de energize all the outputs and anti short cycle timer is started Discharge sensor faulty alert LED code will be displayed OUTDOOR AMBIENT TEMPERATURE RT13 If the outdoor ambient temperature sensor detected a open or out of range 40 F to 140 F 40 C to 60 C then LED alert codes are displayed however cooling operation will continue See Table 9 for LED alert codes for the ambient sensor Location o
69. se pressures may be due to differences in installations A IMPORTANT Model 024 Significant deviations could mean that the system is not properly charged or that a problem exists with some component in the system 030 036 042 048 060 er C 65 18 3 Liquid 234 Suction 139 236 Suction 134 Liquid 226 Suction 134 Liquid 232 Suction 137 Liquid 232 Suction 132 Liquid 236 Suction 131 70 21 1 249 140 251 135 245 135 249 139 249 133 254 132 75 23 9 268 141 271 138 266 137 270 140 268 134 273 133 80 26 7 289 142 291 139 287 138 291 141 288 135 294 135 85 29 4 310 142 312 140 310 139 314 142 311 136 317 136 90 32 2 334 144 335 142 333 140 338 143 333 137 340 137 95 35 0 358 145 358 142 358 141 363 144 357 138 364 139 100 37 8 383 146 383 143 383 143 389 145 380 139 389 140 105 40 6 408 147 409 144 410 144 419 147 406 140 416 142 110 43 3 436 148 436 145 437 145 447 148 433 142 444 143 115 46 1 465 150 467 147 464 146 480 149 462 1
70. so clog the expansion device and reduce the system performance and capacity Failure to properly flush the system per the instructions below will void the warranty Leak Testing the System A WARNING When using a high pressure gas such as dry nitrogen to pressurize a refrigeration or air conditioning system use a regulator that can control the pressure down to 1 or 2 psig 6 9 to 13 8 kPa IMPORTANT Leak detector must be capable of sensing HFC refrigerant 4 WARNING Refrigerant can be harmful if it is inhaled Refrigerant must be used and recovered responsibly Failure to follow this warning may result in personal injury death A WARNING Fire Explosion and Personal Safety Hazard Failure to follow this warning could result in damage personal injury or death Never use oxygen to pressurize or purge refrigeration lines Oxygen when exposed to a spark or open flame can cause damage by fire and or an explosion that could result in personal injury or death Page 16 506510 01 LEAK TEST LINE SET AND INDOOR COIL 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 high pressure damage T GAUGE SET A Connect an HFC 410A manifold gauge set high pressure hose to the vapor valve service port B With both manifold valves closed connect the cylinder of HFC 410A refri
71. ssures with Table 4 Normal Operating Pressures Use APPROACH to correctly charge unit or to verify the charge is correct Set thermostat to call for heat must have a cooling load between 70 80 F 21 26 Connect gauge set When heat demand is satisfied set thermostat to call for cooling Allow temperatures and pressures to stabilize Record outdoor ambient temperature AMB Record line temperature LIQ Subtract to determine approach APP LIQ AMB APP Compare results with table to the left Figure 15 Using Approach Test and Charge Method SUBCOOLING 4 TEST AND CHARGE METHOD 65 F 18 3 C and Above BLOCK OUTDOOR COIL sometimes necessary with lower temperatures Use cardboard or plastic sheet to restrict the airflow through the outdoor coil to achieve pressures from 325 375 psig 2240 2585 kPa Higher pressures are needed to check charge Block equal sections of air intake panels and move coverings sideways until the liquid pressure is in the above noted ranges CARDBOARD OR PLASTIC SHEET If refrigerant added or removed verify charge using the approach method If value is greater than shown remove refrigerant if less than shown add refrigerant SC Subcooling Values F 1 0 C 0 6 Models F C 024 030 036 Any 4 2 2 4 22 7 3 9 Temperature of air entering outdoor coil 042 048 060 5 28 6 3 3 6 3 3
72. tage 2 Outdoor unit power disconnect is open 3 Compressor circuit breaker or fuse s is open Broken wire or connector is not making contact 5 Low or high pressure switch open if present in the system 6 Compressor contactor has failed to close Clearing Status Clears the error after current is sensed in the run and start winding for two seconds service removed or power reset 1 Flashes then Pause Long run time Compressor is running extremely long run cycles 1 Low refrigerant charge 2 Evaporator blower is not running e Check blower relay coil and contacts e Check blower motor capacitor e Check blower motor for failure or blockage e Check evaporator blower wiring and connectors e Check indoor blower control e Check thermostat wiring for open circuit 3 Evaporator coil is frozen e Check for low suction pressure e Check for excessively low thermostat setting e Check evaporator airflow coil blockages or return air filter e Check ductwork or registers for blockage Faulty metering device e Check bulb installation size location and contact e Check if TXV fixed orifice is stuck closed or de fective 5 Condenser coil is dirty 8 Liquid line restriction filter drier blocked if present 7 Thermostat is malfunctioning e Check thermostat sub base or wiring for short cir cuit e Check thermostat installation location and level Clears the error after 30 consecutive normal run cycles
73. than normal refrigerant charge due to either large internal coil volumes and or long line sets METHOD 1 Us this method if the existing outdoor unit is not equipped with shut off valves or if the unit is not operational and you plan to use the existing HCFC 22 to flush the system Remove all HCFC 22 refrigerant from the existing system Check gauges after shutdown to confirm that the entire system is completely void of refrigerant METHOD 2 Use this method if the existing outdoor unit is equipped with manual shut off valves and you plan to use new HCFC 22 refrigerant to flush the system The following devices could prevent full system charge recovery into the outdoor unit Outdoor unit s high or low pressure switches if applicable when tripped can cycle the compressor OFF Compressor can stop pumping due to tripped internal pressure relief valve Compressor has internal vacuum protection that is designed to unload the scrolls compressor stops pumping when the pressure ratio 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 result in overheating of the scrolls and permanent damage to the scroll tips drive bearings and internal seals Once the compressor can not pump down to a lower pressure due to one of the above system conditions shut off the vapor valve Turn OFF the main power to
74. the system earlier is measurable with a leak detector After leak testing disconnect gauges from service ports Page 17 XC17 SERIES Evacuating the System EVACUATING LINE SET AND INDOOR COIL GAUGE SET CONNECT GAUGE SET NOTE Remove cores from service valves if not al ready done Connect low side of manifold gauge set with 1 4 SAE in line tee to vapor line service valve Connect high side of manifold gauge set to liquid line service valve Connect micron gauge available connector on the 1 4 SAE in line tee ES Connect the vacuum pump with MICRON vacuum gauge to the center port of the GAUGE t manifold gauge set The center port line will be used later for both the HFC 410A TO VAPOR and nitrogen containers gt a SERVICE VALVE OUTDOOR UNIT A34000 1 4 SAE TEE WITH SWIVEL COUPLER LIQUID LINE SERVICE VALVE HFC 410A TO LIQUID LINE SERVICE VALVE 1 VACUUM PUMP t NITROGEN RECOMMEND MINIMUM 3 8 HOSE 2 EVACUATE 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 least once A rapid rise in pressure indicates a relatively large leak If this occurs rep
75. tioner Control On board link Low voltage thermostat wiring oe Flat metal jumper 00090006 299 Oe gt 99809 55099668056 Outdoor sensor for outdoor temperature display Optional R connection required for outdoor unit with Control LSOM function Resistor Kit Cat 47W97 is required when using the ComfortSense 7000 Y0349 with Control LSOM feature Resistor kit not required when using ComfortSense 7000 Y2081 Air Handler Control comes from factory with metal jumpers across W1 W2 W3 For one stage electric heat do not remove metal jumpers Air Handler Control comes from factory with metal jumpers across W1 W2 and W3 For two stage electric heat remove metal jumper between W1 to W2 and connect thermostat wire between Air Handler Control W2 to thermostat W2 Cut for Humiditrol Enhanced Dehumidification Accessory EDA applications Figure 9 ComfortSense 7000 Series Thermostat Air Hander One Stage Air Conditioner Page 24 506510 01 ComfortSense amp 7000 Thermostats One Stage Furnace Control Catalog Y0349 or Y2081 Air Conditioner Control On board link Low voltage thermostat wiring 0000006 000 OG gt
76. to avoid injury take proper precaution when lifting heavy objects See Unit Dimensions on page 3 for sizing mounting slab platforms or supports Refer to Figure 3 for mandatory installation clearance requirements POSITIONING CONSIDERATIONS Consider the following when positioning the unit Some localities are adopting sound ordinances based on the unit s sound level registered from the adjacent property not from the installation property Install the unit as far as possible from the property line e When possible do not install the 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 4 Detail A PLACING UNIT ON SLAB When installing unit at grade level the top of the slab should be high enough above grade so that water from higher ground will not collect around the unit The slab should have a slope tolerance as described in Figure 4 Detail B NOTE If necessary for stability anchor unit to slab as described in Figure 4 Detail D Page 7 XC17 SERIES ELEVATING THE UNIT Units are outfitted with elongated support feet as illustrated in Figure 4 Detail C If additional elevation is necessary raise the unit by extending the height of the unit support feet This may be achieved by using a 2 inch 50 8mm Schedule 40 female threaded adapter The specified coupling will fit snuggly int
77. with HCFC 22 must be flushed A WARNING Electric Shock Hazard Can cause injury or death Unit must be grounded in accordance with national and local codes Line voltage is present at all components when unit is not in operation on units with single pole contactors Disconnect all remote electric power supplies before opening access panel Unit may have multiple power supplies Operating Gauge Set and Service Valves These instructions are intended as a general guide and do not supersede local codes in any way Consult authorities who have jurisdiction before installation TORQUE REQUIREMENTS When servicing or repairing heating ventilating and air conditioning components ensure the fasteners are appropriately tightened Table 1 lists torque values for fasteners IMPORTANT Only use Allen wrenches of sufficient hardness 50Rc Rockwell Harness Scale minimum Fully insert the wrench into the valve stem recess Service valve stems are factory torqued from 9 ft lbs for small valves to 25 ft lbs for large valves to prevent refrigerant loss during shipping and handling Using an Allen wrench rated at less than 50Rc risks rounding or breaking off the wrench or stripping the valve stem recess See the Lennox Service and Application Notes C 08 1 for further details and information IMPORTANT To prevent stripping of the various caps used the appropriately sized wrench should be used and fitted snugly ove

Lennox International Inc. 506510

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