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Lennox 10ACC Series, Информация об устройстве

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Lennox 10ACC Series Скачать руководство пользователя страница 12

Page 12

V - WIRING DIAGRAMS AND SEQUENCE OF OPERATION

10ACC OPERATING SEQUENCE

7

1

2

4

6

3

5

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 energizes compressor contactor K1.

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 satisfied. 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.

Содержание 10ACC Series

Страница 1: ... equipped with scroll com pressors The scroll operates like a standard compressor but it is unique in the way it compresses refrigerant WARNING Refrigerant can be harmful if it is inhaled Refriger ant must be used and recovered responsibly Failure to follow this warning may result in person al injury or death WARNING Electric shock hazard Can cause injury or death Before attempting to perform any ...

Страница 2: ...38 kg 6 lbs 3 oz 2 81 kg 8 lbs 5 oz 3 77 kg Condenser Coil Net face area sq ft m2 Outer Coil 9 24 0 86 9 24 0 86 10 46 0 97 11 41 1 06 13 31 1 24 15 11 1 40 20 83 1 94 Condenser Coil Inner Coil 5 4 0 50 Tube diameter in mm 5 16 7 9 5 16 7 9 5 16 7 9 5 16 7 9 5 16 7 9 5 16 7 9 5 16 7 9 No of rows 1 1 1 1 1 1 37 1 Fins per inch m 22 866 22 866 18 709 22 866 22 866 22 866 22 866 Condenser Fan Diamete...

Страница 3: ...chups A misapplied system will cause erratic operation and can result in early compressor failure II UNIT COMPONENTS Unit components are illustrated in figure 1 COMPRESSOR CONTROL BOX SUCTION LINE SERVICE VALVE SUCTION LINE OUTDOOR FAN MOTOR 10ACC UNIT COMPONENTS FIGURE 1 LIQUID LINE SERVICE VALVE DISCHARGE LINE FIGURE 2 DUAL CAPACITOR C12 START CAPACITOR C7 option only POTENTIAL RELAY K31 option ...

Страница 4: ...it capacitor motors The capacitor is located inside the unit control box see figures 2 and 3 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 For ratings see side of capacitor 3 Start Capacitor C7 option Start capacitor C7 is wired in parallel with the compres sor s...

Страница 5: ... centrifugal action of the orbiting scroll seals off the flanks of the scrolls figure 7 2 As the orbiting motion continues the gas is forced toward the center of the scroll and the gas pocket becomes compressed figure 7 3 When the compressed gas reaches the center it is dis charged vertically into a chamber and discharge port in the top of the compressor figure 6 The discharge pressure forcing dow...

Страница 6: ... contactor ELECTRICAL DATA tables in this manual show specifi cations for condenser fans used in 10ACCs Access to the condenser fan motor on all units is gained by removing the seven screws securing the fan assem bly See figure 8 The condenser fan motor is removed from the fan guard by removing the four nuts found on the top panel See figure 9 if condenser fan motor re placement is necessary FAN C...

Страница 7: ...To Access Schrader Port 1 Remove service port cap with an adjustable wrench 2 Connect gauge to the service port 3 When testing is completed replace service port cap Tighten finger tight then an additional 1 6 turn To Open Liquid or Suction Line Service Valve 1 Remove stem cap with an adjustable wrench 2 Using service wrench and hex head extension 3 16 for liquid line and 5 16 for suction line back...

Страница 8: ...STEM CAP INLET FROM INDOOR COIL OUTLET TO COMPRESSOR STEM USE ADJUSTABLE WRENCH ROTATE STEM CLOCKWISE 90_ TO CLOSE ROTATE STEM COUNTER CLOCKWISE 90_ TO OPEN BALL SHOWN OPEN IV CHARGING A Pumping Down System CAUTION Deep vacuum operation operating compressor at 0 psig or lower can cause internal fusite arcing resulting in a damaged or failed compressor This type of damage will result in denial of w...

Страница 9: ...r 500 microns within a 20 minute period after stopping vacuum pump 6 After evacuation is complete close manifold center port and connect refrigerant drum Pressurize system slightly with refrigerant to break vacuum D Charging Units are factory charged with the amount of HCFC 22 re frigerant indicated on the unit nameplate This charge is based on a matching indoor coil and outdoor coil with a 20 ft ...

Страница 10: ...n shown some refrigerant must be recovered If subcooling is less than shown some refrigerant must be added Table 3 10ACC Subcooling Values Fixed Orifice Systems Only OUTDOOR TEMP LIQUID SUBCOOLING 1_F 6_C TEMP _F _C 18 24 30 36 42 48 60 65 18 13 7 14 8 14 8 17 9 5 17 9 5 15 8 3 14 8 70 21 13 7 14 8 14 8 17 9 5 17 9 5 14 8 15 8 3 75 24 13 7 13 7 13 7 16 9 16 9 13 7 15 8 3 80 27 12 6 7 13 7 13 7 15 ...

Страница 11: ...ns could mean that the system is not properly charged or that a problem exists with some component in the sys tem See table 5 E Maintenance WARNING 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 ...

Страница 12: ...s COOLING 1 Cooling demand initiates at Y1 in the thermostat 2 24VAC energizes compressor contactor K1 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 satisfied Terminal Y1 is de energized 6 Compressor contactor K1 is de energized 7 K1 1 opens and compressor B1 and outdo...

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