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# 48283B006

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INSTALLATION AND MAINTENANCE

INSTRUCTIONS

2SCU13 Series

Split System Air Conditioner

Sharp metal edges can cause injury. When
installing the unit, use care to avoid sharp
edges.

  WARNING

Installation and servicing of air conditioning
equipment can be hazardous due to internal
refrigerant pressure and live electrical com-
ponents. Only trained and qualified service
personnel should install or service this equip-
ment. Installation and service performed by
unqualified persons can result in property
damage, personal injury, or death.

  WARNING

Risk of electrical shock. Disconnect all
remote power supplies before installing or
servicing any portion of the system. Failure
to disconnect power supplies can result in
property damage, personal injury, or death.

  WARNING

The equipment covered in this manual is to be installed by trained and experienced
service and installation technicians. Improper installation, modification, service, or
use can cause electrical shock, fire, explosion, or other conditions which may cause
personal injury, death, or property damage. Use appropriate safety gear including
safety glasses and gloves when installing this equipment.

 

WARNING

Manufactured By

A.A.C.

A Lennox International Inc. Company

421 Monroe Street

Bellevue, OH 44811

TABLE OF CONTENTS

INSTALLATION ...................................... 2

START-UP ............................................ 10

OPERATION ........................................ 14

MAINTENANCE ................................... 14

CONNECTION DIAGRAMS ................. 16

WARRANTY ......................................... 18

*48283B006*

Summary of Contents for 2SCU13 Series

Page 1: ...trical shock Disconnect all remote power supplies before installing or servicing any portion of the system Failure to disconnect power supplies can result in property damage personal injury or death W...

Page 2: ...or inspection by the carrier s agent If any damages are discovered and reported to the carrier DO NOT INSTALL THE UNIT as claim may be denied Check the unit rating plate to confirm specifications are...

Page 3: ...rcuit connections are made to the low voltage pigtails A complete unit wiring diagram is located inside the unit control box cover see also pages 16 and 17 of this instruction 3 Install room thermosta...

Page 4: ...although vertical lift applications and trapping require ments need to be reviewed with Technical Services for line sets over 50 energy or vibration can be expected Close attention to line set isolat...

Page 5: ...line Floor Joist or Roof Rafter Metal Sleeve Floor Joist or Roof Rafter Tape or Wire Tie Wire Tie around vapor line only Refrigerant Line Sets Installing Horizontal Runs Figure 7 Refrigerant Line Sets...

Page 6: ...t damage to the valve core and opening port The tube end must stay bottomed in the fitting during final assembly to ensure proper seating sealing and rigidity 7 Install the factory supplied fixed orif...

Page 7: ...id and Suction Line Service Valves The liquid line and suction line service valves and service ports are used for leak testing evacuating charging and checking charge Each valve is equipped with a ser...

Page 8: ...e line set connections and indoor unit must be checked for leaks Ball Type Service Valve Valve Open Figure 11 Use adjustable wrench To open rotate stem counterclockwise 1 4 turn 90 To close rotate ste...

Page 9: ...HCFC 22 into the line set and indoor unit Weigh in a trace amount of HCFC 22 A trace amount is a maximum of 2 oz of refrigerant or 3 lbs pressure Close the valve on the HCFC 22 cylinder and the valve...

Page 10: ...d has been satisfied switch the thermostat to cooling mode with a set point of 68 F When pressures have stabilized use a digital thermometer to record the liquid and suction line temperatures 6 The ou...

Page 11: ...e F _____ Saturation Temperature F _____ Liquid Line Temperature F _____ Subcooling Value F r o o d t u O p m e T F F 1 g n i l o o c b u S d i u q i L 8 1 4 2 0 3 6 3 2 4 8 4 0 6 5 6 3 1 3 1 7 4 1 5...

Page 12: ...e 7 Approach Values for TXV Systems Approach value is the liquid line temperature minus the outdoor ambient temperature 1 F NOTE For best results use the same digital thermometer to check both outdoor...

Page 13: ...1 8 8 6 2 9 7 8 6 2 4 8 5 6 2 5 8 7 7 2 1 8 F 5 1 1 4 9 2 6 8 7 0 3 5 8 9 9 2 3 8 9 0 3 1 8 8 0 3 5 8 3 0 3 6 8 8 1 3 3 8 C F R e c i f i r O d e x i F F 5 6 4 4 1 3 7 7 4 1 8 6 0 4 1 6 6 0 5 1 7 6 7...

Page 14: ...or correct voltage at unit with unit operating 6 Check amp draw outdoor fan motor Unit nameplate _________ Actual _________ NOTE If owner complains of insufficient cooling the unit should be gauged an...

Page 15: ...nician ________________________________________ Nameplate Voltage ______________ Rated Load Ampacity ________ Compressor _______________ Outdoor Fan ___________________ Maximum Fuse or Circuit Breaker...

Page 16: ...OCAL CODES OUTDOOR FAN F C H 1 2 3 R S C C 2 3 1 EQUIPMENT GROUND HR1 L2 208 230 60 1 L1 K1 1 BLACK YELLOW RED RED C12 BLACK ORANGE B4 PURPLE K1 S4 S24 A4 C Y1 TO 24 VAC POWER SOURCE 20 VA MINIMUM NEC...

Page 17: ...2 L3 EQUIPMENT GROUND HR1 S40 K1 1 BLACK BLACK B1 BLACK ORANGE BLACK B4 C1 PURPLE RED 1 FOR USE WITH COPPER CONDUCTORS ONLY REFER TO UNIT RATING PLATE FOR MINIMUM CIRCUIT AMPACITY AND MAXIMUM OVERCURR...

Page 18: ...the only warranty made by the warrantor this warranty is in lieu of and excludes all other warranties express or implied The warrantor does not authorize any person to provide any other warranty or to...

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