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Allied Air 4AC16LT Series Installation And Maintenance Instructions Manual

Split system air conditioner
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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.
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
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.
WARNING
Sharp metal edges can cause injury. When installing
the unit, use care to avoid sharp edges.
506467-01
4AC16LT SERIES
Split System Air Conditioner
Save these instructions for future reference
WARNING
Issue 1008

TABLE OF CONTENTS

INSTALLATION .................................................... 2
START-UP .......................................................... 12
OPERATION ...................................................... 16
MAINTENANCE ................................................. 20
CONNECTION DIAGRAM .................................. 22
Manufactured By
Allied Air Enterprises, Inc.
A Lennox International Inc. Company
215 Metropolitan Drive
West Columbia, SC 29170
*506467-01*
Page 1

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Summary of Contents for Allied Air 4AC16LT Series

  • Page 1: Table Of Contents

    INSTALLATION ... 2 START-UP ... 12 OPERATION ... 16 MAINTENANCE ... 20 CONNECTION DIAGRAM ... 22 Issue 1008 TABLE OF CONTENTS Manufactured By Allied Air Enterprises, Inc. A Lennox International Inc. Company 215 Metropolitan Drive West Columbia, SC 29170 *506467-01* Page 1...

  • Page 2: Installation

    Electrical Code (U.S.) or Canadian Electrical Code (Canada). Compliance should be determined prior to installation. 4AC16LT condensing units use R410A which is an ozone- friendly HFC refrigerant. The unit must be installed with a matching indoor coil and line set. 4AC16LT units are designed for use in expansion valve (TXV) systems only.

  • Page 3: Slab Mounting

    If the 4AC16LT unit is being installed with 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...
  • Page 4 Select line set diameters from Table 2 to ensure that oil return to the compressor. Size vertical suction riser to maintain minimum velocity at minimum capacity. Recommended line length is 50’ or less. If more than 50’ line set is required, contact Technical Service.
  • Page 5 Outside Unit Placement and Installation Install unit away from windows Two 90° elbows installed in lineset will reduce lineset vibration Figure 4 Refrigerant Line Sets: Installing Horizontal Runs To hang line set from joist or rafter, use either metal strapping material or anchored heavy nylon wire ties.
  • Page 6 Refrigerant Line Sets: Transition from Vertical to Horizontal Anchored Heavy Nylon Wire Tie Wall Stud Vapor Line Metal Sleeve Refrigerant Line Sets: Installing Vertical Runs (new construction shown) NOTE: Similar installation practices should be used if line set is to be installed on exterior of outside wall.
  • Page 7 Flushing Existing Line Set and Indoor Coil This procedure should not be performed on systems which contain contaminants, such as compressor burn out. CAUTION When flushing existing line set and/or indoor coil, be sure to empty all existing traps. Residual mineral oil can act as an insulator, preventing proper heat transfer.
  • Page 8 R410A refrigerant and may prevent proper flushing. Use a field-provided fitting to reconnect the lines. 5. Remove the pressure tap valve cores from the 4AC16LT units service valves. Connect an R-22 cylinder with clean refrigerant to the suction service valve. Connect the R-22 gauge set to the liquid line valve and connect a recovery maching with an empty recovery tank to the gauge set.
  • Page 9 Figure 9 Manifold Gauge Set Manifold guage 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 1 - 800 on the high side and a low side of 30” vacuum to 250 psi with dampened speed to 500 psi.
  • Page 10 Ball Type Service Valve (Valve Open) Use adjustable wrench. To open, rotate stem counterclockwise 1/4 turn (90°). To close, rotate stem clockwise 1/4 turn (90°). Figure 11 Leak Testing After the line set has been connected to the indoor and outdoor units, the line set connections and indoor unit must be checked for leaks.
  • Page 11 of 22 of 222. Connect micron gauge. 3. Connect the vacuum pump (with vacuum gauge) to the center port of the manifold gauge set. 4. Open both manifold valves and start vacuum pump. 5. Evacuate the line set and indoor unit to a minimum of 500 microns or lower.

  • Page 12: Start-Up

    START-UP CAUTION If unit is equipped with a crankcase heater, it should be energized 24 hours before unit start-up to prevent compressor damage as a result of slugging. 1. Rotate fan to check for frozen bearings or binding. 2. Inspect all factory and field-installed wiring for loose connections.
  • Page 13 2. Close manifold gauge set valves. Connect the center manifold hose to an upright cylinder of R410A. 3. If room temperature is below 70°F, set the room thermo- stat to call for heat. This will create the necessary load for properly charging the system in the cooling cycle. 4.
  • Page 14 R410A Temperature/Pressure Chart T e m p . P re s s u re T e m p . P re s s u re P s ig P s ig 1 0 0 .8 2 1 4 .0 1 0 2 .9 2 1 7 .4 1 0 5 .0 2 2 0 .9...
  • 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 506467-01 Issue 1008 Page 15...

  • Page 16: Operation

    ON position, the indoor blower operates continuously. System Diagnostic Module 4AC16LT units contain a diagnostic module for trouble- shooting air conditioning system failures. By monitoring and analyzing data from the compressor and thermostat demand, the module can accurately detect the cause of electrical and system related failure without any sensors.

  • Page 17: Flash Codes

    e e e e e o l l o i t o l l s t i 506467-01 Flash Codes c t i e l i l i o t i c u l i l i o f r i l i o y t l l l a...
  • Page 18 o l l y l f o l l o l l o l l o l l o l l o l l c r i t i u 506467-01 Flash Codes (cont.) c t i c t i t i c e l i n i l...
  • Page 19 a l f n i l . y l , t i , t i ) t i . y l ) t i c r i t i u . y l 506467-01 Miswired Module Troubleshooting . s l y f i s l i s l l...

  • Page 20: Maintenance

    MAINTENANCE WARNING Before performing maintenance operations on system, turn the electric power to unit OFF at disconnect switch(es). Unit may have multiple power supplies. Electrical shock could cause personal injury or death. Maintenance and service must be performed by a quali- fied installer or service agency.
  • Page 21 Job Name _______________________________ Job Location _____________________________ Installer _________________________________ Unit Model No. ______________ Service Technician ________________________________________ Rated Load Ampacity ________ Maximum Fuse or Circuit Breaker ________________________ Electrical Connections Tight? Indoor Blower RPM _____________ Outdoor Coil Entering Air Temperature _____________ Discharge Pressure ___________ Refrigerant Charge Checked? Refrigerant Lines: Leak Checked? Service Valves: Fully Opened?

  • Page 22: Connection Diagram

    OUTDOOR YELLOW COMPRESSOR CRANKCASE HEATER (IF USED) 208-230/60/1 EQUIPMENT GROUND FOR USE WITH COPPER CONDUCTORS ONLY. REFER TO UNIT RATING PLATE FOR MINIMUM CIRCUIT AMPACITY AND MAXIMUM OVERCURRENT PROTECTION SIZE. WARNING-- ELECTRIC SHOCK HAZARD, CAN CAUSE INJURY OR DEATH. UNIT MUST BE GROUNDED IN ACCORDANCE WITH NATIONAL AND LOCAL CODES.