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INSTALLATION AND MAINTENANCE INSTRUCTIONS
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.
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.
Installation and servicing of air conditioning equipment
can be hazardous due to internal refrigerant pressure
and live electrical components. Only trained and qualified
service personnel should install or service this equipment.
Installation and service performed by unqualified persons
can result in property damage, personal injury, or death.
Sharp metal edges can cause injury. When installing the
unit, use care to avoid sharp edges.
506251-01
4SCU14LE SERIES
Split System Air Conditioner
Save these instructions for future reference
WARNING
WARNING
WARNING
WARNING
TABLE OF CONTENTS
INSTALLATION ...................................... 2
START-UP ............................................ 12
OPERATION ........................................ 16
MAINTENANCE ................................... 16
CONNECTION DIAGRAM ................... 18
WARRANTY ......................................... 19
ALLIED AIR ENTERPRISES, INC.
A Lennox International Inc. Company
Issue 1015
Manufactured By
215 Metropolitan Drive
West Columbia, SC 29170
*506251-01*
Page 1 of 20
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Summary of Contents for Allied Air 4SCU14LE SERIES
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Page 1: Table Of Contents
Installation and service performed by unqualified persons can result in property damage, personal injury, or death. Manufactured By ALLIED AIR ENTERPRISES, INC. A Lennox International Inc. Company 215 Metropolitan Drive WARNING West Columbia, SC 29170 Sharp metal edges can cause injury. -
Page 2: Installation
INSTALLATION If any damages are discovered and reported to the carrier DO NOT INSTALL THE UNIT, as claim may be denied. General Check the unit rating plate to confirm specifications Read this entire instruction manual, as well as the instructions supplied in separate equipment, before are as ordered. - Page 3 Slab Mounting Thermostat Designations Discharge Air Thermostat Indoor Unit Building Power Outdoor Structure Unit Heat Cooling Y1 Outdoor Unit Indoor Blower Mounting Slab C Outdoor Unit See unit wiring diagram for power supply connections. If the indoor unit is not equipped with a blower relay, one must be Ground Level field supplied and installed.
- Page 4 to maintain minimum velocity at minimum capacity. Installing Refrigerant Line Recommended line length is 50' or less. If more than 50' During the installation of an air conditioning system, it is line set is required, contact Technical Services at 1-800-448- important to properly isolate the refrigerant line to prevent 5872.
- Page 5 Refrigerant Line Sets: Installing Horizontal Runs To hang line set from joist or rafter, use either metal strapping material Wire Tie or anchored heavy nylon wire ties. (around vapor line only) 8’ Strapping Material Floor Joist or (around vapor line only) Roof Rafter Tape or Wire Tie 8’...
- Page 6 Refrigerant Line Sets: Installing Vertical Runs (new construction shown) IMPORTANT: Refrigerant lines must not contact wall. Outside Wall Vapor Line Liquid Line NOTE: Similar installation practices should be used if line set is to be Wood Block installed on exterior of outside wall. Between Studs Wire Tie Inside Wall...
- Page 7 Flushing Existing Line Set and Indoor Coil Flushing Procedure This procedure should not be performed on systems which contain contaminants, such as compressor IMPORTANT: The line set and/or indoor coil must be flushed burn out. with at least the same amount of refrigerant that previously charged the system.
- Page 8 When the low side system pressures reach 0 psig, close of the recovery machine and turn the machine off. the suction line valve. Disconnect all power to the existing outdoor unit. Refer to the gauges after shutdown to confirm 10. Use nitrogen to break the vacuum on the refrigerant that the valves are not allowing refrigerant to flow back lines and indoor coil before removing the recovery into the low side of the system.
- Page 9 Metering Device Installation Service Valve Valve Closed Figure 9 Manifold Gauge Set Manifold gauge sets used with systems charged with R410A refrigerant must be capable of handling the higher system operating pressures. The gauges should be rated for use with pressures 0 – 800 on the high side and a low side of 30"...
- Page 10 The ball valve is equipped with a service port with a factory- 2. With both manifold valves closed, connect the cylinder installed Schrader valve. A service port cap protects the of R410A refrigerant. Open the valve on the R410A Schrader valve from contamination and serves as the primary cylinder (vapor only).
- Page 11 Evacuation 7. Shut off the nitrogen cylinder and remove the manifold Evacuating the system of noncondensables is critical for gauge hose from the cylinder. Open the manifold gauge proper operation of the unit. Noncondensables are defined valves to release the nitrogen from the line set and indoor as any gas that will not condense under temperatures and unit.
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Page 12: Start-Up
START-UP Refrigerant Charge Adjustment CAUTION Liquid Line Set Oz. per 5 ft. adjust Diameter from 15 ft. line set * If unit is equipped with a crankcase heater, it should be 3/8 in. 3 oz. per 5 ft. energized 24 hours before unit start-up to prevent compressor damage as a result of slugging. - Page 13 • High pressure gauge to liquid line service valve R410A Temperature/Pressure Chart 2. Close manifold gauge set valves. Connect the center manifold hose to an upright cylinder of R410A. F ° F ° F ° 3. If room temperature is below 70°F, set the room thermostat to call for heat.
- Page 14 _____ ° Saturation Temperature °F 4. Use the same digital thermometer to check liquid line temperature. – _____ ° Liquid Line Temperature °F 5. Subtract the outdoor ambient temperature from the liquid _____ ° Subcooling Value °F _____ ° Liquid Line Temperature °F –...
- Page 15 Normal Operating Pressures L = Liquid S = Suction Values provided above are typical pressures. Indoor unit matchup, indoor air quality, and indoor load will cause pressures to vary. Table 8 506251-01 Issue 1015 Page 15 of 20...
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Page 16: Operation
OPERATION MAINTENANCE Outdoor unit and indoor blower cycle on demand from the WARNING room thermostat. When the thermostat blower switch is moved to the ON position, the indoor blower operates Before performing maintenance operations on system, continuously. turn the electric power to unit OFF at disconnect switch(es). - Page 17 4. Check all wiring for loose connections. 5. Check for correct voltage at unit (with unit operating). 6. Check amp-draw on blower motor. Unit nameplate _________ Actual _________ Start-Up and Performance Checklist Job Name _______________________________ Job No. ________________ Date ______________ Job Location _____________________________ City ___________________ State ______________...
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Page 18: Connection Diagram
OUTDOOR DUAL CAPACITOR TIMED OFF CONTROL PURPLE TO 24 VAC (IF USED) BLACK POWER SOURCE 20 VA MINIMUM ORANGE NEC CLASS 2 YELLOW BLACK COMPRESSOR COMPRESSOR CONTACTOR CRANKCASE HEATER (IF USED) GROUND 208-230/60/1 GROUND BLACK K1-1 S4 HIGH S24 LOSS 208-230/60/1 YELLOW PRESSURE... -
Page 19: Warranty
For non-residential applications, the covered equipment and parts are warranted for a period of one (1) year and compressor is warranted for five (5) years from the date of the original installation. If, during this period, a covered component fails because of a manufacturing defect, Allied Air will provide a free replacement part to the owner through a licensed service contractor utilizing an Allied Air distributor. - Page 20 Allied Air Enterprises Inc. (“Allied Air”) provides its air conditioning and heating products with a Standard Limited Parts Warranty for five (5) years. This additional 5-Year Limited Extended Parts Warranty is in addition to and is intended to supplement Allied Air’s Standard Limited Parts Warranty. As such, Allied Air provides for a total of 10-years of limited warranty coverage (Standard Limited Parts Warranty plus additional 5-Year Limited Extended Parts Warranty).
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