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1. o g o S e ui N c 2 o p G o o Page 11 V WIRING DIAGRAMS AND SEQUENCE OF OPERATION 13ACC 2 THROUGH 5 TON OPERATING SEQUENCE OUTDOOR FAN M CAPACITOR DGG OO OHW TIMED OFF To 24 VAC POWER punp OTOR Cr BLACK CONTROL SOURCE E 20 VA MINIMUN NEC CLASS 2 j1 COMPRESSOR t CRANKCASE HEATER A 208 230 60 1 RAN RE NE S AE FOR MINIMUM CIRCUIT NEC CLASS 2 AMPACITY AND MAXIMUM OVERCURRENT PROTECTION WARNING ELECTRIC SHOCK HAZARD CAN CAUSE INJURY OR DEATH UNIT MUST BE GROUNDED IN ACCORDANCE WITH NATIONAL AND LOCAL CODES INDICATES OPTIONAL LINE VOLTAGE FIELD INSTALLED OLTA D INSTA COMPONENTS A A COOLING UNITS CONDENSING UNITS 3ACC 018 024 030 036 037 042 047 048 060 230 01 upersedes Form No ee New Form No 2002 Lennox Industries Inc Litho U S A NOTE The thermostat used may be electromechanical or electronic NOTE Transformer in indoor unit supplies power 24 VAC to the thermostat and outdoor unit controls COOLING 1 Cooling demand initiates at Y1 in the thermostat 2 24VAC from indoor unit Y1 energizes the timed off control TOC if used which energizes compressor contactor K1 provided the 5 minute delay is satisfied 3 K1 1 N O closes energizing compressor B1 and outdoor fan motor B4 4 Compressor B1 and outdoor fan motor B4 begin immediate operation END OF COOLING DEMAND 5 Cooling demand is sat2. LENNOX UNITINFORMATIOM 13ACC Pd Corp 0219 L5 Service Literature Revised 10 2004 13ACC SERIES UNITS The 13ACC is aresidential split system condensing unit with SEER ratings up to 14 80 The series is designed for 4 use with expansion valves TXV and RFC All 13ACC units utilize scroll compressors 13ACC condensing units are available in 1 1 2 2 2 1 2 3 3 1 2 4 and 5 ton capacities All major components indoor blower and coil must be matched according to Lennox rec ommendations for the compressor to be covered under war ranty Refer to the Engineering Handbook for approved sys tem matchups Information contained in this manual is intended for use by qualified service technicians only All specifications are subject to change This manual is divided into sections which discuss the major components refrigerant system charging proce dure maintenance and operation sequence AWARNING Improper installation adjustment alteration service or maintenance can cause property damage person in al injury or loss of life Installation and service must ELECTROSTATIC DISCHARGE ESD be performed by a qualified installer or service Precautions and Procedures agency A CAUTION Electrostatic discharge can affect electronic components Take precautions during unit instal lation and service to protect the unit s electronic controls Precautions will help to avoid control A WARNING Refrige
3. 19 1 3 4 19 1 7 8 22 2 7 8 22 2 1Refrigerant HCFC 22 furnished 5 Ibs 2 oz 5 Ibs 1 oz 6 Ibs 10 oz 7 lbs 3 oz 9 Ibs 0 oz 2 32 kg 2 30 kg 3 00 kg 3 26 kg 4 08 kg Condenser Net face area Outer coil 15 21 1 41 15 21 1 41 15 21 1 41 15 21 1 41 19 83 1 84 Coil sq ft m Inner coil 5 44 0 51 5 44 0 51 14 50 1 35 14 50 1 35 18 90 1 76 Tube diameter in mm amp number of rows 5 16 8 1 37 5 16 8 1 37 5 16 8 2 5 16 8 2 5 16 8 2 Fins per inch m 22 866 22 866 22 866 22 866 22 866 Condenser Diameter in mm amp Number of blades 18 457 3 18 457 3 18 457 4 18 457 4 18 457 4 kan Motor hp W 1 6 124 1 6 124 1 6 124 1 6 124 1 6 124 Cfm L s 2500 1180 2500 1180 2450 1155 2450 1155 2410 1135 Rpm 1100 1100 1100 1100 1100 Watts 200 200 200 200 180 Shipping Data Ibs kg 1 package 155 70 155 70 175 79 180 82 191 87 ELECTRICAL DATA General Maximum fuse size amps 15 20 30 35 30 pata 2Minimum circuit ampacity 11 5 14 0 18 0 20 4 19 5 Compressor Rated load amps 14 7 Power factor 98 Locked rotor amps 83 0 Condenser Full load amps 1 1 1 1 1 1 1 1 1 1 Fan Motor Locked rotor amps 1 9 1 9 1 9 1 9 1 9 Optional Accessories MUST BE ORDERED EXTRA Compressor Crankcase Heater 18K20 18K20 18K20 18K20 18K20 Compressor Hard Start Kit Compressor Monitor Compressor Sound Cover 10J42 10J42 10J42 10J42 10J42 45F08 45F08 45F08 4
4. 13ACC018 L152125 25 7 6 3 8 esses s ur pree Tee een m e 13ACCO24 13ACCO30 L15 41 30 30 9 3 8 13acco36 15 65 30 30 9 13ACCO37 OCA L15 65 40 3 8 13ACC048 115 65 50 65 50 13ACC047 4 Field fabricate 2 B Service Valves The liquid line and vapor line service valves figures 10 and 9 and gauge ports are used for leak testing evacuating charging and checking charge See table 2 for torque re quirements Each valve is equipped with a service port which has a fac tory installed Schrader valve A service port cap protects the Schrader valve from contamination and serves as the primary leak seal Page 6 Table 2 Torque Requirements Part Recommended Torque Sheet metal screws 16 in Ib Machine screws 10 28 in Ib Compressor bolts 90 in Ib 10 NM Gauge port seal cap 8 ft Ib 11 NM To Access Schrader Port 1 Remove service port cap with an adjustable wrench 2 Connect gauge to the service port 3 When testing is complete replace service port cap Tighten finger tight then an additional 1 6 turn To Open Service Valve 1 Remove the stem cap with an adjustable wrench 2 Use a service wrench with a hex head extension to back the stem out counterclockwise as far as it will go NOTE Use a 3 16 hex head extension for liquid line sizes or a 5 16 extension for vapor line sizes 3 Replace the stem cap Tighten finger tight then tighten an addition
5. Ill CHARGING The unit is factory charged with the amount of HCFC 22 re frigerant indicated on the unit rating plate This charge is based on a matching indoor coil and outdoor coil with a 15 foot 4 5 m line set For varying lengths of line set refer to table 3 for refrigerant charge adjustment A blank space is pro vided on the unit rating plate to list actual field charge A IMPORTANT If line length is greater than 15 feet 4 5 m add this amount If line length is less than 15 feet 4 5 m subtract this amount TABLE 3 LIQUID LINE Ounce per 5 foot ml per mm adjust SET DIAMETER from 15 foot 4 5m line set 3 8 in 10 mm 3 ounce per 5 feet 90 ml per 1524 mm If line set is greater than 15 ft 4 5 m add this amount If line set is less than 15 feet 4 5 m subtract this amount Units are designed for line sets up to 50 feet 15 2 m Consult Lennox Refrigerant Piping Manual for line sets over 50 feet 15 2 m A Pumping Down System A CAUTION Deep vacuum operation operating compressor below 0 psig can cause internal fusite arcing resulting in a damaged or failed compressor This type of damage will result in denial of warranty claim The system may be pumped down when leak checking the line set and indoor coil or making repairs to the line set or indoor coil Attach gauge manifold then follow below 1 Close liquid line valve 2 Start outdoor unit 3 Monitor suction gauge Stop unit when 0
6. not affect system reliability performance or indi cate damage See compressor nameplate or ELECTRICAL DATA for compressor specifications C Condenser Fan Motor All units use single phase PSC fan motors which require a run capacitor In all units the condenser fan is controlled by the compressor contactor ELECTRICAL DATA tables in this manual show specifi cations for condenser fans used in 13ACCs Access to the condenser fan motor on all units is gained by removing the seven screws securing the fan assem bly See figure 7 The condenser fan motor is removed from the fan guard by removing the four nuts found on the top panel Drip loops should be used in wiring when servicing motor See figure 8 if condenser fan motor re placement is necessary DANGER Make sure all power is disconnected before beginning electrical service procedures CONDENSER FAN MOTOR AND COMPRESSOR ACCESS Remove 7 screws FAN GUARD REMOVE 7 SCREWS SECURING FAN GUARD REMOVE FAN GUARD FAN ASSEMBLY FIGURE 7 Remove 4 nuts ALIGN FAN HUB FLUSH WITH END OF SHAFT FIGURE 8 ll REFRIGERANT SYSTEM A Plumbing Field refrigerant piping consists of liquid and suction lines from the condensing unit sweat connections to the indoor evaporator coil flare or sweat connections Use Lennox L15 sweat series line sets as shown in table 1 TABLE 1 Line Set Condensing Model No Unit Model No Tee nemo e
7. 5F08 45F08 69J03 69J03 69J03 69J03 69J03 Driers Liquid Line sweat connections 12L71 12L71 12L71 12L71 12L71 Suction Line sweat connections 88K44 88K44 88K44 88K45 88K45 Hail Guard High Pressure Switch Kit Loss of Charge Kit Low Ambient Kit Mounting Model Number Catalog Number Dimensions W x D x H in 22 1 4 x 22 1 4 x 3 22 1 4 x 22 1 4 x 3 22 1 4 x 22 1 4 x 3 22 1 4 x 22 1 4 x 3 22 1 4 x 22 1 4 x 3 Base Refrigerant Line Set Timed Off Control MB2 S 69J06 MB2 S 69J06 MB2 S 69J06 MB2 S 69J06 MB2 S 69J06 mm 565 x 565 x 76 565 x 565 x 76 565 x 565 x 76 565 x 565 x 76 565 x 565 x 76 Shipping Weight 6 Ibs 3 kg 6 Ibs 3 kg 6 Ibs 3 kg 6 Ibs 3 kg 6 Ibs 3 kg 15 ft 4 6 m length L15 21 15 L15 41 15 L15 41 15 L15 65 15 L15 65 15 20 ft 6 m length L15 21 20 L15 41 20 L15 41 20 Not Available Not Available 25 ft 7 6 m length L15 21 25 Not Available Not Available Not Available Not Available 30 ft 9 1 m length Not Available L15 41 30 L15 41 30 L15 65 30 L15 65 30 35 ft 10 7 m length L15 41 35 Not Available Not Available Not Available Not Available 40 ft 12 2 m length Not Available L15 41 40 L15 41 40 L15 65 40 L15 65 40 50 ft 15 2 m length L15 41 50 L15 41 50 L15 41 50 L15 65 50 L15 65 50 Unit Stand Off Kit 4727 4727 4727 47J27 47J27 94J45 94J45 94J45 94J45 94J45 1Refrigerant charge sufficient for 15 ft 4 6 m length of refrigerant lines 2Refer to Natio
8. J74 DUAL CAPACITOR C12 ao K1 Tia dd 0 O E Uy GROUNDING o LUG FIGURE 2 2 Dual Capacitor C12 The compressor and fan in 13ACC series units use per manent split capacitor motors The capacitor is located inside the unit control box see figure 2 A single dual capacitor C12 is used for both the fan motor and the compressor see unit wiring diagram The fan side and the compressor side of the capacitor have different MFD ratings Ratings will be on compressor nameplate and condenser fan nameplate 3 Timed Off Control TOC option The time delay is electrically connected between thermo stat terminal Y and the compressor contactor Between cycles the compressor contactor is delayed for 5 minutes 2 minutes but may last as long as 8 minutes At the end of the delay the compressor is allowed to energize When thermostat demand is satisfied the time delay opens the circuit to the compressor contactor coil and the compressor is de energized B Compressor COMPRESSOR CONTACTOR TIMED OFF CONTROL OPTION SCROLL COMPRESSOR DISCHARGE SUCTION FIGURE 3 Page 4 All 13ACC units utilize a scroll compressor The scroll com pressor design is simple efficient and requires few moving parts A cutaway diagram of the scroll compressor is shown in figure 3 The scrolls are located in the top of the compressor can and the m
9. al 1 6 turn To Close Service Valve 1 Remove the stem cap with an adjustable wrench 2 Use a service wrench with a hex head extension to turn the stem clockwise to seat the valve Tighten the stem firmly NOTE Use a 3 16 hex head extension for liquid line sizes or a 5 16 extension for vapor line sizes 3 Replace the stem cap Tighten finger tight then tighten an additional 1 6 turn Ball Valve Valve Open Use Adjustable Wrench To open rotate Stem Clockwise 90 To close rotate Stem Counter clockwise 90 4 stem cap to outdoor coil ball shown open service port cap Schrader valve FIGURE 9 Page 7 Service Valve service port to outdoor coil service port cap Schrader valve open to line set when valve is closed front seated valve front seated Service Valve Valve Open insert hex stem cap wrench here service port to outdoor coil Te J D f V Z2 service port cap to indoor coil Schrader valve FIGURE 10 Vapor Line Ball Valve Vapor line service valves function the same way as the oth er valves the difference is in the construction These valves are not rebuildable If a valve has failed you must replace it A ball valve is illustrated in figure 9 The ball valve is equipped with a service port with a factory installed Schrader valve A service port cap protects the Schrader valve from contamination and assures a leak free seal
10. cuum gauge that is calibrated in microns Use an instrument that reads from 50 microns to at least 10 000 microns 1 Connect manifold gauge set to the service valve ports e low pressure gauge to vapor line service valve e high pressure gauge to liquid line service valve 2 Connect micron gauge 3 Connect the vacuum pump with vacuum gauge to the center port of the manifold gauge set 4 Open both manifold valves and start the vacuum pump 5 Evacuate the line set and indoor unit to an absolute pressure of 23 000 microns 29 01 inches of mercu ry During the early stages of evacuation it is desir able to close the manifold gauge valve at least once to determine if there is a rapid rise in absolute pressure A rapid rise in pressure indicates a relatively large leak If this occurs repeat the leak testing procedure Page 8 NOTE The term absolute pressure means the total actual pressure within a given volume or system above the absolute zero of pressure Absolute pres sure in a vacuum is equal to atmospheric pressure mi nus vacuum pressure O 1 When the 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 nitrogen cylin der with pressure regulator set to 150 psig 1034 kPa and purge the hose Open the manifold gauge valves t
11. cylinder 4 Connect a cylinder of nitrogen with a pressure regulat ing valve to the center port of the manifold gauge set 5 Connect the manifold gauge set high pressure hose to the vapor valve service port Normally the high pres sure hose is connected to the liquid line port however connecting it to the vapor port better protects the man ifold gauge set from high pressure damage 6 Adjust the nitrogen pressure to 150 psig 1034 kPa Open the valve on the high side of the manifold gauge set which will pressurize line set and indoor unit 7 After a few minutes open a refrigerant port to ensure the refrigerant you added is adequate to be detected Amounts of refrigerant will vary with line lengths Check all joints for leaks Purge nitrogen and HCFC 22 mixture Correct any leaks and recheck C Evacuating the System Evacuating the system of noncondensables is critical for proper operation of the unit Noncondensables are defined as any gas that will not condense under temperatures and pressures present during operation of an air conditioning system Noncondensables and water vapor combine with refrigerant to produce substances that corrode copper pip ing and compressor parts NOTE This evacuation process is adequate for a new installation with clean and dry lines If excessive mois ture is present the evacuation process may be re quired more than once A IMPORTANT Use a thermocouple or thermistor electronic va
12. d into the unit Do this after any leaks have been re paired 1 Recover the refrigerant from the unit 2 Conduct a leak check then evacuate as previously outlined 3 Weigh in the unit nameplate charge Page 9 If weighing facilities are not available or if you are charging the unit during warm weather follow one of the other proce dures outlined below Charging Using the Subcooling Method Fixed Orifice Systems Outdoor Temp gt 65 F 18 C If you charge a fixed orifice system when the outdoor ambi ent is 65 F 18 C or above use the subcooling method to charge the unit 1 With the manifold gauge hose still on the liquid service port and the unit operating stably use a digital ther mometer to record the liquid line temperature 2 At the same time record the liquid line pressure reading 3 Use a temperature pressure chart for HCFC 22 to de termine the saturation temperature for the liquid line pressure reading 4 Subtract the liquid line temperature from the saturation temperature according to the chart to determine sub cooling Saturation temperature Liquid line tem perature Subcooling 5 Compare the subcooling value with those in table 5 or 6 If subcooling is greater than shown recover some refrigerant If subcooling is less than shown add some refrigerant Approach and Normal Operating Pressures TXV Systems Outdoor Temp gt 65 F 18 C The following procedure is
13. il Entering Air F C Reading taken at compressor Table 7 ca EA alolo xjloj o e NIN IN IN 10 el e dizisisizisg r o o o ziel xliej eles gir ojl IA iO N NIT lO loal e Zli 2i 2le lwv NIN N TAIN AN o 6 s 2 9 N Jo I 9 o eo o r o o 2 NIN JR IS N N NN XN g o N 5 o 7 d zlielir izie e rx a lof jo IN o o e XIS 8 ISIE 15 S S oO IX Jo lots 3 I lt lt N SIR IS 818 S 9 IF le IS I8 NIN N 9 9 lol o ririeie 2 5 elzleleizl 2 r r r r r M mimi xy 9 S o o dielseli lieje oloel lelz o Qixiojr loljo e 8 2 x S 3 aul ej i i N NININIS N G i 2 9 r licololo cl lt J lt elcla o In lo red E c 2 r r r r o a 0 NIN IN TN IN c ole o o E s gt dixiselieiejo xl lols o Qix wl r ljolo e gigal iv i li l l N Tie N Oho a 5 5 e 1 c 9 o o le A ke r co 2 gt o S S 5 R 3 18 9 7 Oo dli l l l lw 5 D 2 9 rlololo c 2j r r rm r 9 m o 3 y oljoj uvjoJ l 1 Y giit iso rielo Ey 5 i a a E a o 3 g 3 ol t t o o i 2 nr r r r r E a o re g 3 o Q g S3 3 5 o S S A lI l l l o 4 o o S o 9 jolo o o Oo 2 r r co co o o S divoiseielixie S E gx S EISIS E 3 gt c 9 a In z le Jo N JN IN 0 7 o 5 ce o9 x m e Je 2 g i EHE a 2 alolalc 3 olaleia g o o z m m t
14. intended as a general guide and is for use on expansion valve systems only For best results indoor temperature should be 70 F 21 C to 80 F 26 C Monitor system pressures while charging 1 Record outdoor ambient temperature using a digital thermometer 2 Attach high pressure gauge set and operate unit for several minutes to allow system pressures to stabilize 3 Compare stabilized pressures with those provided in table 7 Normal Operating Pressures Minor varia tions in these pressures may be expected due to differ ences in installations Significant differences could mean that the system is not properly charged or that a problem exists with some component in the system Pressures higher than those listed indicate that the system is overcharged Pressures lower than those listed indicate that the system is undercharged Verify adjusted charge using the approach method Outdoor temperature should be 65 F 18 C or above Use the same digital thermometer used to check out door ambient temperature to check liquid line tempera ture Verify the unit charge using the approach method The difference between the ambient and liquid temper atures should match values given in table 3 Refriger ant must be added to lower approach temperature and removed to increase approach temperature Loss of charge results in low capacity and efficiency A V If the values don t agree with the those in table 4 add refrigerant to lower the ap
15. ischarged vertically into a chamber and discharge port in the top of the compressor figure 5 The discharge pressure forcing down on the top scroll helps seal off the upper and lower edges tips of the scrolls figure 5 During a single orbit several pockets of gas are compressed simultaneously providing smooth continuous compression The scroll compressor is tolerant to the effects of liquid return If liquid enters the scrolls the orbiting scroll is allowed to sepa rate from the stationary scroll The liquid is worked toward the center of the scroll and is discharged If the compressor is re placed conventional Lennox cleanup practices must be used e p INTERMEDIATE PRESSURE 2 GAS CRESCENT SHAPED GAS POCKET FLANKS SEALED BY CENTRIFUGAL FORCE SUCTION D J MOVEMENT OF ORBIT 3 HIGH PRESSURE GAS FIGURE 6 4 DISCHARGE POCKET Due to its efficiency the scroll compressor is capable of draw ing a much deeper vacuum than reciprocating compres sors Deep vacuum operation can cause internal fusite arcing resulting in damaged internal parts and will result in compressor failure Never use a scroll compressor for evacuating or to pump system into a vacuum This type of damage can be detected and will result in denial of warranty claims The scroll compressor is quieter than a reciprocating com pressor however the two compressors have much different sound characteristics The sounds made by a scroll com pressor do
16. isfied Terminal Y1 is de energized 6 Compressor contactor K1 is de energized 7 K1 1 opens and compressor B1 and outdoor fan motor B4 are de energized and stop immediately Page 12
17. nal or Canadian Electrical Code manual to determine wire fuse and disconnect size requirements NOTE Extremes of operating range are plus 10 and minus 5 of line voltage Page 2 SPECIFICATIONS General Model No 13ACC 042 13ACC 047 13ACC 048 13ACC 060 Data Nominal Tonnage KW 3 5 12 3 4 14 1 4 14 1 5 17 6 Connections Liquid line o d in mm 3 8 9 5 3 8 9 5 3 8 9 5 3 8 9 5 Wenn Suction line o d in mm 7 8 22 2 1 1 8 28 6 7 8 22 2 1 1 8 28 6 Refrigerant HCFC 22 furnished 7 lbs 11 oz 3 49 kg 10 Ibs 14 oz 4 93 kg 10 Ibs 8 oz 4 76 kg Condenser Net face area Outer coil 15 21 1 41 24 5 2 28 21 11 1 96 21 11 1 96 d eate Inner coil 14 50 1 35 23 56 2 19 20 31 1 89 20 31 1 89 Tube diameter in mm amp number of rows 5 16 8 2 5 16 8 2 5 16 8 2 5 16 8 2 Fins per inch m 22 866 22 866 22 866 22 866 Condenser Diameter in mm amp Number of blades 18 457 4 22 559 4 22 559 4 22 559 4 man Motor hp W 1 3 249 1 4 186 1 3 249 1 3 249 Cfm L s 2930 1385 3830 1805 3890 1835 3890 1835 Rpm 1100 825 1085 1085 Watts 310 330 375 375 Shipping Data Ibs kg 1 package 186 84 226 103 250 113 254 115 Electrical Data General Line voltage data 60 hz 1ph 208 230V 208 230V 208 230V 208 230V Data Maximum fuse size amps 35 40 50 60 2Minimum circuit ampacity 22 5 24 6 31 5 38 0 Compressor Rated load amps 16 5 28 9 Powe
18. ns 5 Check for correct voltage at unit unit operating 6 Check amp draw condenser fan motor Unit nameplate Actual NOTE If owner complains of insufficient cooling the unit should be gauged and refrigerant charge checked Refer to section on refrigerant charging in this instruction Indoor Coil 1 Clean coil if necessary 2 Check connecting lines and coils for evidence of oil leaks 3 Check the condensate line and clean it if necessary Indoor Unit 1 Clean or change filters 2 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 drop tables and procedure 3 Belt Drive Blowers Check belt for wear and proper tension 4 Check all wiring for loose connections 5 Check for correct voltage at unit blower operating 6 Check amp draw on blower motor Unit nameplate Actual Table 5 Subcooling SC and Superheat SH a s are in F Unit hon ate Device 037 07 048 Air F LA IERERERESERESERES cepe pepe pep Se tee e e poe s npe pwpepwpepw s epe e e e e a ww re pets pe rete fs elo pets pepspepspw v s Table 6 Subcooling SC and Superheat SH Reading s are in F 0 084 0 093 0 099 42J5401 78L7401 42J6201 0 079 25M5601 0 077 42J5001 coc 2 51 oa 0 063 0 071 42J4701 42J4301 0 055 42J3901 RFC SIZE Out Co
19. o break the vacuum in the line set and indoor unit Close the manifold gauge valves A CAUTION Danger of Equipment Damage Avoid deep vacuum operation Do not use compres sors to evacuate a system Extremely low vacuums can cause internal arcing and compressor failure Damage caused by deep vacuum operation will void warranty 7 Shut off the nitrogen cylinder and remove the manifold gauge hose from the cylinder Open the manifold gauge valves to release the nitrogen from the line set and indoor unit co 1 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 1 When the absolute pressure requirement above has been met disconnect the manifold hose from the vacu um pump and connect it to an upright cylinder of HCFC 22 refrigerant Open the manifold gauge valves to break the vacuum from 1 to 2 psig positive pressure in the line set and indoor unit Close manifold gauge valves and shut off the HCFC 22 cylinder and remove the manifold gauge set D Charging Weighing in the Charge Fixed Orifice or TXV Systems Outdoor Temp lt 65 F 18 C If the system is void of refrigerant or if the outdoor ambient temperature is cool the refrigerant charge should be weighe
20. otor is located just below The oil level is immedi ately below the motor The scroll is a simple compression concept centered around the unique spiral shape of the scroll and its inherent properties Figure 4 shows the basic scroll form Two identical scrolls are mated together forming concentric spiral shapes figure 5 One scroll remains stationary while the other is allowed to or bit figure 6 Note that the orbiting scroll does not rotate or turn but merely orbits the stationary scroll NOTE During operation the head of a scroll compressor may be hot since it is in constant contact with discharge gas SCROLL FORM FIGURE 4 SUCTION ay ORBITING SCROLL y STATIONARY SCROLL SUCTION POCKET SUCTION D Page 5 SUCTION CROSS SECTION OF SCROLLS DISCHARGE PME Cm w WN PRESSURE S n P g 4 LLL 5 fe N A lly CUNNNNNNNNN N SASSY se SSS S LEAF M AAK AKARA AS Fe bd SS SS LL NS N h NG NW A N V TIPS SEALED BY ORBITING SCROLL DISCHARGE PRESSURE FIGURE 5 The counterclockwise orbiting scroll draws gas into the outer crescent shaped gas pocket created by the two scrolls figure 6 1 The centrifugal action of the orbiting scroll seals off the flanks of the scrolls figure 6 2 As the orbiting motion contin ues the gas is forced toward the center of the scroll and the gas pocket becomes compressed figure 6 3 When the compressed gas reaches the center it is d
21. proach temperature or re cover refrigerant from the system to increase the ap proach temperature Table 4 Approach Temperatures TXV Systems Only Approach Temperature M I No odel No Liquid Line Outdoor Ambient F C 13ACC 018 2 HT 13ACC 024 9S 1 13ACC 030 6 3 1 13ACC 036 1 1 30 9 1 13ACC 037 1 12 1 19ACC 042 8 4 1 13ACC 048 7 4s 1 13ACC 047 106i 13ACC 060 12 2 1 NOTE For best results use the same digital thermometer to check both outdoor ambient and liquid temperatures E Oil Charge Refer to compressor nameplate IV MAINTENANCE AWARNING Electric shock hazard Can cause inju ry or death Before attempting to per form any service or maintenance turn the electrical power to unit OFF at dis connect switch es Unit may have multiple power supplies 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 Clean and inspect the outdoor coil The coil may be flushed with a water hose Ensure the power is turned off before you clean the coil 2 Condenser fan motor is prelubricated and sealed No further lubrication is needed 3 Visually inspect connecting lines and coils for evidence of oil leaks 4 Check wiring for loose connectio
22. psig is reached 4 Close vapor line valve B Leak Testing After the line set has been connected to the indoor and outdoor units check the line set connections and indoor unit for leaks A 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 or death AWARNING Danger of explosion Can cause equipment damage injury or death Never use oxygen to pressurize a re frigeration or air conditioning system Oxygen will explode on contact with oil and could cause personal injury A WARNING Danger of explosion Can cause equipment damage injury or death 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 Using an Electronic Leak Detector or Halide 1 Connect a cylinder of HCFC 22 to the center port of the manifold gauge set 2 With both manifold valves closed open the valve on the HCFC 22 cylinder vapor only 3 Open the high pressure side of the manifold to allow the HCFC 22 into the line set and indoor unit Weigh in a trace amount of HCFC 22 A trace amount is a maxi mum of 2 ounces 57 g or 3 pounds 31 kPa pres sure Close the valve on the HCFC 22 cylinder and the valve on the high pressure side of the manifold gauge set Disconnect the HCFC 22
23. r factor 98 96 Locked rotor amps 95 0 169 0 Condenser Full load amps 1 9 1 9 Fan Motor Locked rotor amps 4 1 3 1 4 1 4 1 Optional Accessories MUST BE ORDERED EXTRA Compressor Crankcase Heater 18K20 18K20 18K20 18K20 Compressor Hard Start Kit 10J42 81J69 Compressor Monitor 45F08 45F08 Compressor Sound Cover 69J03 69J03 Driers Liquid Line sweat connections 12L71 12L71 12L71 12L71 Suction Line sweat connections 88K45 88K45 Hail Guard 17L73 ame naa O 17L74 High Pressure Switch Kit 94J46 94J46 Loss of Charge Kit 94J47 94J47 94J47 94J47 Low Ambient Kit 24H77 24H77 24H77 24H77 Mounting Model Number Catalog Number MB2 S 69J06 MB2 L 69J07 MB2 L 69J07 MB2 L 69J07 Base Dimensions W x D x H in 22 1 4 x 22 1 4 x 3 32 x 34x3 32 x 34x 3 32 x 34x 3 mm 565 x 565 x 76 813 x 864 x 76 813 x 864 x 76 813 x 864 x 76 Shipping Weight 6 Ibs 3 kg 15 Ibs 7 kg 15 Ibs 7 kg 15 Ibs 7 kg oe 15 ft 4 6 m length L15 65 15 Field Fabricate L15 65 15 Field Fabricate ine Se 30 ft 9 1 m length L15 65 30 Field Fabricate L15 65 30 Field Fabricate 40 ft 12 2 m length L15 65 40 Field Fabricate L15 65 40 Field Fabricate 50 ft 15 2 m length L15 65 50 Field Fabricate L15 65 50 Field Fabricate Timed Off Control 47J27 47J27 47J27 47J27 Unit Stand Off Kit 94J45 94J45 94J45 94J45 1Refrigerant charge sufficient for 15 ft 4 6 m length of refrigerant lines 2Refer to National or Canadian Electrical Code manual to dete
24. rant can be harmful if it is inhaled Refrigerant must be used and recovered responsibly Hi exposure to electrostatic discharge by putting the unit the control and the technician at the same electrostatic potential Neutralize electro static charge by touching hand and all tools on an TABLE OF CONTENTS unpainted unit surface before performing any service procedure Failure to follow this warning may result in person al injury or death General i srra e ae an aae eaa eens 1 Specifications Elecrical Data 2 Unit Components 0 0 0 ccc eee 4 A IMPORTANT Il Refrigerant System 02 022000 00 6 p The Clean Air Act of 1990 bans the intentional vent I Chargirig sesioa menn naai oa ha Ei 7 ing of CFC s and HFC s as of July 1 1992 Approved I Malhtenan s 10 methods of recovery recycling or reclaiming must oe es ge ee ee be followed Fines and or incarceration my be levied V Wiring and Operating Sequence 12 for noncompliance Technical Publications Page 1 2002 Lennox Industries Inc SPECIFICATIONS General Model No 13ACC 018 13ACC 024 13ACC 030 13ACC 036 13ACC 037 Data Nominal Tonnage KW 1 5 5 3 2 7 0 2 5 8 8 3 10 6 3 10 6 Line voltage data 60 hz 1ph 208 230V 208 230V 208 230V 208 230V 208 230V Connections Liquid line o d in mm 3 8 9 5 3 8 9 5 3 8 9 5 3 8 9 5 3 8 9 5 sweat Suction line o d in mm 5 8 15 9 3 4
25. rmine wire fuse and disconnect size requirements NOTE Extremes of operating range are plus 10 and minus 5 of line voltage Page 3 I UNIT COMPONENTS 13ACC UNIT COMPONENTS OUTDOOR FAN MOTOR CONTROL BOX SUCTION LINE UCTION LINE RVICE VALVE di COMPRESSOR LIQUID LINE DISCHARGE LINE SERVICE VALVE FIGURE 1 A Control Box Figure 2 13ACC units are not equipped with a 24V transformer All 24 VAC controls are powered by the indoor unit Refer to wiring diagram Electrical openings are provided under the control box cov er Field thermostat wiring is made to color coded pigtail connections 1 Compressor Contactor K1 The compressor is energized by a contactor located in the control box See figure 2 Single pole contactors are used in 13ACC series units K1 is energized by the indoor ther mostat terminal Y1 24V when thermostat demand is present A DANGER Electric Shock Hazard May cause injury or death Line voltage is present at all compo nents when unit is not in operation on units with single pole contactors Disconnect all remote electrical power supplies before opening unit panel Unit may have multiple power supplies 13ACC UNIT CONTROL BOX
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