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# 48387H005

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INSTALLATION AND MAINTENANCE

INSTRUCTIONS

4SCU13LE Series

Split System Air Conditioner

TABLE OF CONTENTS

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

START-UP ............................................ 13

OPERATION ........................................ 17

MAINTENANCE ................................... 17

CONNECTION DIAGRAM ................... 19

WARRANTY ......................................... 20

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

*48387H005*

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

  WARNING

Summary of Contents for 4SCU13LE Series

Page 1: ...sk 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...

Page 2: ...e is shipped with the unit while the TXV expansion valve must be ordered separately from the manufacturer A filter drier approved for use with 410A is installed in the unit IMPORTANT This product has...

Page 3: ...coil Installation Instructions for additional wiring application diagrams and refer to unit rating plate for minimum circuit ampacity and maximum overcurrent protection size 1 Install line voltage po...

Page 4: ...a new indoor coil and line set the refrigerant connections should be made as outlined in this section If an existing line set and or indoor coil will be used to complete the system refer to this sect...

Page 5: ...s to consider when placing and installing a high efficiency outdoor unit Placement Be aware that some localities are adopting sound ordi nances based on how noisy the unit is at the neighbor s home no...

Page 6: ...por Line Figure 9 Refrigerant Line Sets Installing Vertical Runs new construction shown Outside Wall Wood Block Between Studs IMPORTANT Refrigerant lines must not contact wall Vapor Line Liquid Line W...

Page 7: ...l be sure to empty all existing traps Residual mineral oil can act as an insulator preventing proper heat transfer It can also clog the thermal expansion valve reducing system performance and capacity...

Page 8: ...ore removing the recovery machine When the low side system pressures reach 0 psig close the suction line valve Disconnect all power to the existing outdoor unit Refer to the gauges after shutdown to c...

Page 9: ...the piston orifice and used teflon seal Insert nozzle end of the expansion valve along with a new teflon seal into the distributor and tighten to 20 30 ft lbs Use backup wrench on all wrench flats Ov...

Page 10: ...wrench with a hex head extension to back the stem out counterclockwise as far as it will go Use a 3 16 hex head extension for liquid line service valves and a 5 16 extension for suction line service v...

Page 11: ...r coil 6 After a short period of time open a refrigerant port to make sure that an adequate amount of refrigerant has been added for detection refrigerant requirements will vary with lengths Check all...

Page 12: ...ge hose from the cylinder Open the manifold gauge valves to release the nitrogen from the line set and indoor unit 8 Reconnect the manifold gauge to the vacuum pump turn the pump on and continue to ev...

Page 13: ...tage must be within the range listed on the unit nameplate If not do not start equipment until the power company has been consulted and the voltage condition corrected 6 Set thermostat for cooling dem...

Page 14: ...Table 6 to determine the saturation temperature for the liquid line pressure reading 4 Subtract the liquid line temperature from the satura tion temperature according to the chart to determine subcoo...

Page 15: ...Minor variations in these pres sures may be expected due to differences in installa tions Significant differences could mean that the system is not properly charged or that a problem exists with some...

Page 16: ...8 7 1 3 9 3 1 6 2 3 1 4 1 5 2 3 4 3 1 4 2 3 7 3 1 4 1 3 4 3 1 5 2 3 7 3 1 4 3 3 0 3 1 F 5 9 3 6 3 2 4 1 6 7 3 2 4 1 2 7 3 6 3 1 4 7 3 9 3 1 2 6 3 5 3 1 6 8 3 9 3 1 3 8 3 3 3 1 F 5 0 1 3 1 4 4 4 1 8 2...

Page 17: ...for 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 a...

Page 18: ...nician ________________________________________ Nameplate Voltage ______________ Rated Load Ampacity ________ Compressor _______________ Outdoor Fan ___________________ Maximum Fuse or Circuit Breaker...

Page 19: ...L AND LOCAL 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 MINI...

Page 20: ...ade 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 assume for it any...

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