Allied 4AC16L Service Manual
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Allied 4AC16L Service Manual

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SERVICE MANUAL
4AC16L/14LB
This is a safety alert symbol and should never be ignored. When you see this symbol on labels or in manuals, be alert to
the potential for personal injury or death.
Improper installation, adjustment, alteration, service
or maintenance can cause property damage, personal
injury or loss of life. Installation and service must be
performed by a licensed professional HVAC installer (or
equivalent), service agency or the gas supplier.
As with any mechanical equipment, contact with sharp
sheet metal edges can result in personal injury. Take
care while handling this equipment and wear gloves
and protective clothing.
508228-01
WARNING
CAUTION

Table of Contents

Technical Specifications - 4AC16L ..............................2
Technical Specifications - 4AC14B ..............................5
Technical Specifications - 4AC14*P-10 .......................8
Installation .................................................................14
Refrigeration Piping ...................................................17
Electrical Wiring .........................................................26
Sequence of Operation..............................................30
Start-Up .....................................................................30
Maintenance ..............................................................31
Wiring Diagram ..........................................................33
Servicing Units Void of Charge ..................................35
System Refrigerant ....................................................35
Charge Labels ...........................................................38
Start-Up and Performance Checklist .........................41
Electric shock hazard.
Can cause injury or death. Before attempting
to perform any service or maintenance,
turn the electrical power to unit OFF at
disconnect switch(es). Unit may have
multiple power supplies.
*P508228-01*
Issue 2136
WARNING
(P) 508228-01
Page 1 of 41

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Summary of Contents for Allied 4AC16L

  • Page 1: Table Of Contents

    This is a safety alert symbol and should never be ignored. When you see this symbol on labels or in manuals, be alert to the potential for personal injury or death. Table of Contents Technical Specifications - 4AC16L ......2 Technical Specifications - 4AC14B ......5 Technical Specifications - 4AC14*P-10 .......8 Technical Specifications - 4AC14*P-6 thru 7 .....10...

  • Page 2: Technical Specifications - 4Ac16L

    Technical Specifications - 4AC16L MODEL NUMBER GUIDE 4 A C 16 L 24 P - 50 A Refrigerant Minor Revision Code 4 = R410A Major Revision Code 50 = Omniguard ® Air Conditioner Electrical SEER P - 208 - 230v/60hz/1Ph...
  • Page 3 SOUND RATINGS Estimated Sound Pressure (dBA) Approximate Distance Model Sound Power 3.3 Feet 6.6 Feet 9.8 Feet (1 Meter) (2 Meters) (3 Meters) 4AC16L18P-50 4AC16L24P-50 4AC16L30P-50 4AC16L36P-50 4AC16L41P-50 4AC16L42P-50 4AC16L47P-50 4AC16L48P-50 4AC16L59P-50 4AC16L60P-50 1 Rated in accordance with AHRI standard 270 (2015). AHRI Standard 270 establishes a method of rating outdoor unitary equipment in terms of Sound Power.
  • Page 4 REFRIGERATION DATA Refrigerant Connection Indoor Expansion Refrigerant Line Size Charge Device Outdoor Model Outdoor Indoor (DTC) (oz) Suction Liquid Suction Liquid Suction Liquid Piston 4AC16L18P-50 0.052 H4TXV01 4AC16L24P-50 0.060 H4TXV01 4AC16L30P-50 0.067 H4TXV01 4AC16L36P-50 0.072 H4TXV02 4AC16L41P-50 † H4TXV02 4AC16L42P-50 0.081 H4TXV02 4AC16L47P-50...

  • Page 5: Technical Specifications - 4Ac14B

    Technical Specifications - 4AC14B MODEL NUMBER GUIDE 4 A C 14 B 24 P - 50 A Refrigerant Minor Revision Code 4 = R410A Major Revision Code 50 = Omniguard ® Air Conditioner Electrical SEER P - 208 - 230v/60hz/1Ph Tonnage Tier 18, 24, 30, 36, 42, 48, 60...
  • Page 6 SOUND RATINGS Estimated Sound Pressure (dBA) Approximate Distance Model Sound Power 3.3 Feet 6.6 Feet 9.8 Feet (1 Meter) (2 Meters) (3 Meters) 4AC14B18P-50 4AC14B24P-50 4AC14B30P-50 4AC14B36P-50 4AC14B42P-50 4AC14B48P-50 4AC14B60P-50 1 Rated in accordance with AHRI standard 270 (2015). AHRI Standard 270 establishes a method of rating outdoor unitary equipment in terms of Sound Power.
  • Page 7 REFRIGERATION DATA Refrigerant Connection Indoor Expansion Refrigerant Line Size Charge Device Outdoor Model Outdoor Indoor (DTC) (oz) Suction Liquid Suction Liquid Suction Liquid Piston 4AC14B18P-50 0.052 H4TXV01 4AC14B24P-50 0.060 H4TXV01 4AC14B30P-50 0.067 H4TXV01 4AC14B36P-50 0.072 H4TXV02 4AC14B42P-50 0.081 H4TXV02 4AC14B48P-50 0.083 H4TXV02 4AC14B60P-50...

  • Page 8: Technical Specifications - 4Ac14*P-10

    Technical Specifications - 4AC14*P-10 MODEL NUMBER GUIDE 4 A C 14 L R 24 P - 10 A Refrigerant Minor Revision Code 4 = R410A Major Revision Code Electrical Air Conditioner P - 208 - 230v/60hz/1Ph SEER Tonnage 18, 24, 30, 36, 41, 42, 47, 48, 59, 60 Tier L = Louvered Restrictions...
  • Page 9 UNIT DIMENSIONS (IN.) Dimensions Sound Rating Model (dBA) Width Depth Height 4AC14*18P 24.25 24.25 29.00 4AC14*R18P 4AC14*24P 28.25 28.25 29.00 4AC14*R24P 4AC14*30P 28.25 28.25 37.00 4AC14*R30P 4AC14*36P 28.25 28.25 37.00 4AC14*R36P 4AC14*41P 28.25 28.25 37.00 4AC14*42P 28.25 28.25 33.00 4AC14*R42P 4AC14*47P 28.25 28.25...

  • Page 10: Technical Specifications - 4Ac14*P-6 Thru 7

    Technical Specifications - 4AC14*P-6 thru 7 MODEL NUMBER GUIDE 4 A C 14 L R 24 P - 7 A Refrigerant Minor Revision Code 4 = R410A Major Revision Code Electrical Air Conditioner P - 208 - 230v/60hz/1Ph SEER Tonnage 18, 24, 30, 36, 41, 42, 47, 48, 59, 60 Tier L = Louvered...
  • Page 11 UNIT DIMENSIONS (IN.) Dimensions Sound Rating Model (dBA) Width Depth Height 4AC14*18P-6,7 24.25 24.25 29.00 4AC14*R18P-6,7 4AC14*24P-6,7 28.25 28.25 29.00 4AC14*R24P-6,7 4AC14*30P-6,7 28.25 28.25 37.00 4AC14*R30P-6,7 4AC14*36P-6,7 28.25 28.25 37.00 4AC14*R36P-6,7 4AC14*41P-6,7 28.25 28.25 37.00 4AC14*42P-6,7 28.25 28.25 33.00 4AC14*R42P-6,7 4AC14*47P-6,7 28.25 28.25...
  • Page 12 FAN BLADE SPECS Fan Blade 4AC16L*-50 Dia. #of Blades Pitch Part # 98M18 43W37 43W37 15X85 43W37 43W37 21W10 30W24 21W10 21W10 Fan Blade 4AC14B*-50 Dia. #of Blades Pitch Part # 98M18 43W37 43W37 15X85 43W37 43W37 21W10 30W24 21W10...
  • Page 13 NOTE — Plumbing layout and compressor type may vary between model sizes. CONTROL COMPRESSOR DUAL RUN CAPACITOR THERMAL SWITCH GROUND LUG DISCHARGE LINE COMPRESSOR HARNESS CONNECTION CONTACTOR OUTDOOR COIL CUTOUT FOR HIGH VOLTAGE CONDUIT CONTROL WIRE LOOP CRANKCASE HEATER THERMOSTAT CRANKCASE HEATER SUCTION LINE SERVICE VALVE LIQUID LINE SERVICE VALVE...

  • Page 14: Refrigerant Metering Device - Indoor Coil

    Refrigerant Metering Device - Indoor Coil For correct metering device, refer to chart below. Indoor Indoor Outdoor Model Orifice Size Expansion Outdoor Model Orifice Size Expansion Device Device 4AC14*18P-10 0.053 A4TXV01 4AC14*18P-6,7 0.053 A4TXV01 4AC14*R18P-10 0.053 A4TXV01 4AC14*R18P-6,7 0.053 A4TXV01 4AC14*24P-10 0.057 A4TXV01...
  • Page 15 Discharge Air Building Structure 24” Mounting Slab 6”* Ground Level Mounting slab must slope slightly away from building, not to exceed 1/4” per foot. 30” around Control Figure 2. Slab Mounting NOTE: See Table 1 for specific minimum clearance guidelines. Elevate Unit Figure 3.
  • Page 16 Torque Requirements Liquid and Suction Line Service Valves When servicing or repairing heating, ventilating, and The liquid line and suction line service valves (see Figure air conditioning components, ensure the fasteners are 4) and service ports are used for leak testing, evacuation, appropriately tightened.

  • Page 17: Refrigeration Piping

    Refrigeration Piping • Use only refrigerant grade copper tubes. • Split systems may be installed with up to 50 feet of line set (no more than 20 feet vertical) without special consideration (see long line set guidelines). • Ensure that vapor and liquid tube diameters are appropriate to capacity of unit.
  • Page 18 LINE SET IMPORTANT — Refrigerant lines must not contact structure. INSTALLATION REFRIGERANT LINE SET — INSTALLING Line Set Isolation — The following illustrations are VERTICAL RUNS (NEW CONSTRUCTION SHOWN) examples of proper refrigerant line set isolation: NOTE — Insulate liquid line when it is routed through areas where the surrounding ambient temperature could become higher than the REFRIGERANT LINE SET —...
  • Page 19 It is recommended that vertical suction risers not be up- STUB END sized. Proper oil return to the compressor should be TWO-PIECE PATCH PLATE LIQUID LINE (UNCASED COIL ONLY) maintained with suction gas velocity. ORIFICE EXPANSION HOUSING VALVE DISTRIBUTOR TUBES ®...
  • Page 20 1. Connect gauges and equipment as shown in Figure 7. CYLINDER CONTAINING GAUGE CLEAN R-410A TO BE Set the recovery machine for liquid recovery and start MANIFOLD USED FOR FLUSHING the recovery machine. Open the gauge set valves to (Positioned to deliver liquid refrigerant) allow the recovery machine to pull a vacuum on the HIGH...
  • Page 21 Refrigerant Piping - Install Indoor Expansion Valve This outdoor unit is designed for use in systems that include an expansion valve metering device (purchased separately) at the indoor coil. See the Product Specifications for approved expansion valve kit match-ups and application information. The check expansion valve unit can be installed internal or external to the indoor coil.
  • Page 22 Refrigerant Piping - Brazing Procedures CAP AND CORE REMOVAL CUT AND DEBUR Cut ends of the refrigerant lines square (free from nicks or dents) Remove service cap and core from and debur the ends. The pipe must remain round. Do not crimp end both the vapor and liquid line service of the line.
  • Page 23 WRAP SERVICE VALVES To help protect service valve seals during brazing, wrap water-saturated cloths around service valve bodies and copper tube stubs. Use additional water-saturated cloths underneath the valve body to protect the base paint. FLOW NITROGEN Flow regulated nitrogen (at 1 to 2 psig) through the refrigeration gauge set into the valve stem port connection on the liquid service valve and out of the vapor valve stem port.
  • Page 24 Leak Test and Evacuation LEAK TEST HIGH MANIFOLD GAUGE SET OUTDOOR UNIT TO VAPOR SERVICE VALVE NOTE - Position canister to deliver liquid refrigerant. NITROGEN HFC-410A CONNECT GAUGE SET A - Connect the high pressure hose of an HFC-410A manifold gauge set to the vapor valve service port. NOTE - Normally, the high pressure hose is connected to the liquid line port.
  • Page 25 EVACUATION HIGH CONNECT GAUGE SET NOTE - Remove cores from service valves (if not already done). A - Connect low side of manifold gauge set with 1/4 SAE in-line tee to vapor line service valve B - Connect high side of manifold gauge set to OUTDOOR MANIFOLD liquid line service valve...

  • Page 26: Electrical Wiring

    Ground unit at unit disconnect switch or to an earth Electrical Wiring ground. To facilitate conduit, a hole is in the bottom of the control box. Connect conduit to the control box All field wiring must be done in accordance with the National using a proper conduit fitting.
  • Page 27 HIGH PRESSURE SWITCH (S4) — LIQUID LINE CRANKCASE HEATER (HR1) CRANKCASE THERMOSTAT (S40) Figure 9. Typical Factory Wiring Diagram (Copeland Compressor) 508228-01 Issue 2136 Page 27 of 41...
  • Page 28 HIGH PRESSURE SWITCH (S4) — LIQUID LINE CRANKCASE HEATER (HR1) Figure 10. Typical Factory Wiring Diagram (Copeland Compressor) (59 model only) Page 28 of 41 Issue 2136 508228-01...
  • Page 29 THERMAL PROTECTION SWITCH (S5 OR S173) HIGH PRESSURE SWITCH (S4) — LIQUID LINE CRANKCASE HEATER (HR1) CRANKCASE THERMOSTAT (S40) Figure 11. Typical Factory Wiring Diagram (Interlink Compressor) 508228-01 Issue 2136 Page 29 of 41...

  • Page 30: Sequence Of Operation

    Refrigerant Charging Sequence of Operation CAUTION NOTE: The thermostat used may be electromechanical or electronic. Excessive amounts of liquid refrigerant entering the suction line can damage the compressor. When adding NOTE: Transformer in indoor unit supplies power (24 VAC) refrigerant, precautions must be taken to control the to the thermostat and outdoor unit controls.

  • Page 31: Maintenance

    cooling mode using the subcooling method and table NOTE: All unit table values are based on 70 to 80°F provided on the unit access panel. indoor return air temperature for cooling mode, and 65°F to 75°F return air temperature for heat mode. •...
  • Page 32 WARNING To prevent personal injury, or damage to panels, unit or structure, be sure to observe the following: While installing or servicing this unit, carefully stow all removed panels out of the way, so that the panels will not cause injury to personnel, nor cause damage to objects or structures nearby, nor will the panels be subjected to damage (e.g., being bent or scratched).

  • Page 33: Wiring Diagram

    Wiring Diagram Figure 14. A/C Single Phase Wiring Diagram 508228-01 Issue 2136 Page 33 of 41...
  • Page 34 Figure 15. A/C Single Phase Wiring Diagram (59 model only) Page 34 of 41 Issue 2136 508228-01...

  • Page 35: Servicing Units Void Of Charge

    Servicing Units Void of Charge System Refrigerant If the outdoor unit is void of refrigerant, clean the system This section outlines procedures for: using the procedure described below. Connecting gauge set for testing and charging; Leak check system using procedure outlined on Page Checking and adjusting indoor airflow;...
  • Page 36 Adding or Removing Refrigerant This system uses HFC-410A refrigerant which operates at much higher pressures than HCFC-22. The pre-installed liquid line filter drier is approved for use with HFC-410A only. Do not replace it with components designed for use with HCFC-22. This unit is NOT approved for use with coils which use capillary tubes or fixed orifices as a refrigerant metering device.
  • Page 37 Psig Psig °F °C °F °C -40.0 11.6 15.6 170.0 -37.2 14.9 18.3 185.0 -34.4 18.5 21.1 201.0 -31.7 22.5 23.9 217.0 -28.9 26.9 26.7 235.0 -26.1 31.7 29.4 254.0 -23.3 36.8 32.2 274.0 -20.6 42.5 35.0 295.0 -17.8 48.6 37.8 317.0 -15.0...

  • Page 38: Charge Labels

    Charge Labels Figure 16. 4AC16L/4AC14B-50 Page 38 of 41 Issue 2136 508228-01...
  • Page 39 Figure 17. 4AC14L/B-10 508228-01 Issue 2136 Page 39 of 41...
  • Page 40 Figure 18. 4AC14L/B-6 thru 7 Page 40 of 41 Issue 2136 508228-01...

  • Page 41: Start-Up And Performance Checklist

    Start-Up and Performance Checklist Job Name _________________________________________ Job no. _____________________________ Date ________________ Job Location ____________________________________________ City ______________________ State ____________________ Installer ________________________________________________ City ______________________ State ____________________ Unit Model No. _____________________ Serial No. __________________________ Service Technician ____________________ Nameplate Voltage __________________________________________________________________________________________ Rated Load Ampacity ________________ Compressor _______________________ Outdoor Fan ________________________ Maximum Fuse or Circuit Breaker _______________________________________________________________________________ □...

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