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INSTALLATION AND MAINTENANCE

INSTRUCTIONS

SCU14M Series

Split System Air Conditioner

TABLE OF CONTENTS

UNIT DIMENSIONS ............................... 2

INSTALLATION ...................................... 3

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

OPERATION ........................................ 12

MAINTENANCE ................................... 12

CONNECTION DIAGRAM ................... 14

WARRANTY ......................................... 15

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 Company

421 Monroe Street

Bellevue, OH 44811

Содержание SCU14M Series

Страница 1: ...on 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 servic...

Страница 2: ...m m 9 5 7 6 1 8 5 6 8 5 0 3 6 7 6 3 7 4 8 4 0 M 4 1 U C S n i 8 7 3 3 8 1 2 3 6 1 1 4 3 3 1 8 5 6 2 8 5 8 1 m m 1 6 8 6 1 8 5 6 8 0 3 3 6 7 6 3 7 4 0 6 0 M 4 1 U C S n i 8 7 9 3 8 1 2 3 6 1 1 4 3 9 1...

Страница 3: ...ation SCU14M condensing units use R410A which is an ozone friendly HFC refrigerant This unit must be installed with a matching indoor coil and line set SCU14M units are designed for use in expansion v...

Страница 4: ...to drafts direct sunshine or other heat sources 3 Install low voltage wiring from outdoor to indoor unit and from thermostat to indoor unit see Figure 2 on this page and Figure 7 on page 14 4 Ground u...

Страница 5: ...e of nicks or dents and must be deburred I D and O D 2 Before making line set connections use dry nitrogen to purge the refrigerant piping This will help to prevent oxidation and the introduction of m...

Страница 6: ...Tighten to 20 30 ft lbs Use backup wrench on all wrench flats Overtightening will crush the teflon seal and may cause a leak 4 Connect the external equalizer line to the equalizer port on the suction...

Страница 7: ...ng procedures The existing devices are not approved for use with R410A refrigerant and may prevent proper flushing Use a field provided fitting to reconnect the lines 4 Remove the pressure tap valve c...

Страница 8: ...terclockwise until the valve stem just touches the retaining ring 3 Replace the stem cap Tighten finger tight then tighten an additional 1 6 turn To Close Liquid or Suction Line Service Valve 1 Remove...

Страница 9: ...oints for leaks Purge nitrogen and R410A mixture Correct any leaks and recheck IMPORTANT The leak detector must be capable of sensing HFC refrigerant Evacuation and Dehydration Evacuating the system o...

Страница 10: ...rant charge contained in condensing unit into system Replace and tighten caps Use a back up wrench on the suction and liquid valves when removing or replacing valve caps 4 To open suction valve remove...

Страница 11: ...2 4 0 M 4 1 U C S L 1 4 2 2 8 2 6 2 3 3 7 3 4 2 4 S 1 3 1 3 3 1 5 3 1 7 3 1 9 3 1 8 4 0 M 4 1 U C S L 6 2 2 6 6 2 0 1 3 6 5 3 7 0 4 S 0 3 1 2 3 1 5 3 1 7 3 1 9 3 1 0 6 0 M 4 1 U C S L 0 4 2 9 7 2 1 2...

Страница 12: ...each cooling season the system should be checked as follows 1 Clean and inspect condenser coil Coil may be flushed with a water hose 2 Condenser fan motor is pre lubricated and sealed No further lubri...

Страница 13: ...rmine the correct blower CFM Refer to the unit information service manual for pressure drop tables and proce dure 3 On belt drive blowers check belt for wear and proper tension 4 Check all wiring for...

Страница 14: ...APACITOR DUAL C12 B4 B4 BLACK RUN ORANGE COMMON K1 S87 S1 ROOM THERMOSTAT TO INDOOR UNIT COMMON 24VAC FAN HEAT W G R Y B1 2 2 2 S4 S1 ROOM THERMOSTAT LOW PRESSURE SWITCH HIGH PRESSURE SWITCH COMPRESSO...

Страница 15: ...n belts fuses or other consumable items 3 Damage caused by misuse failure to maintain properly accidents or acts of God 4 External wiring piping venting or attachment of accessory products not integra...

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