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©2018 Lennox Industries Inc.
Dallas, Texas, USA
THIS MANUAL MUST BE LEFT WITH THE
HOMEOWNER FOR FUTURE REFERENCE
WARNING
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, or service agency.
IMPORTANT
The Clean Air Act of 1990 bans the intentional venting of
refrigerant (CFCs, HCFCs and HFCs) as of July 1, 1992.
Approved methods of recovery, recycling or reclaiming
must be followed. Fines and/or incarceration may be
levied for noncompliance.
CAUTION
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.
STEP 1 – SETTING THE UNIT – Clearances
See NOTES
See
NOTES
See NOTES
NOTES -
Service clearance of 30 in. (762 mm) must be maintained on one of
the sides adjacent to the control box.
Clearance to one of the other three sides must be 36 in. (914 mm).
See
Clearance to one of the remaining two sides may be 12 in. (305
NOTES
mm) and the final side may be 6 in. (152 mm).
A clearance of 24 in. must be maintained between two units.
CONTROL
48 in. (1219 mm) clearance required on top of unit.
BOX
Page 1
INSTALLATION
INSTRUCTIONS
Aire-Flo
4AC14 Series Units
®
AIR CONDITIONER
507831-01
3/2018
General
This 4AC14 outdoor air conditioner is designed for use
with HFC-410A refrigerant only. This unit must be installed
with an approved indoor air handler or coil. See the 4AC14
Product Specifications bulletin (EHB) for approved indoor
component match ups.
These instructions are intended as a general guide and do
not supersede local codes in any way. Consult authorities
having jurisdiction before installation.
NOTICE!
Charging information is given on the charging
procedure sticker on the unit access panel. For
more in-depth information, consult the Installation
and Service Procedures manual.
Shipping and Packing List
Check the components for shipping damage. If you find
any damage, immediately contact the last carrier.
Package 1 of 1 contains the following:
1 - Assembled 4AC14 air conditioner
1 - RFCIV refrigerant flow control orifice
1 - Liquid line filter drier – 4AC14L(S)36 to 60 only
NOTE – 4AC14LS18 to 30 are equipped with a factory-in-
stalled suction filter drier. Liquid line drier is not required.
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Related Manuals for Aire-Flo 4AC14LS24P
Summary of Contents for Aire-Flo 4AC14LS24P
- Page 1 INSTALLATION INSTRUCTIONS ©2018 Lennox Industries Inc. Aire-Flo 4AC14 Series Units ® Dallas, Texas, USA AIR CONDITIONER 507831-01 3/2018 General This 4AC14 outdoor air conditioner is designed for use with HFC-410A refrigerant only. This unit must be installed with an approved indoor air handler or coil. See the 4AC14 Product Specifications bulletin (EHB) for approved indoor component match ups.
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Page 2: Step 1 - Setting The Unit
PLACEMENT FIGURE 1 INSTALL UNIT AWAY FROM WINDOWS TABLE 1 – Unit Dimensions Model Numbers 4AC14LS18P 28-1/4 (724) 29-1/4 (743) 4AC14LS24P 28-1/4 (724) 33-1/4 (845) 4AC14LS30P 28-1/4 (724) 37-1/4 (946) 4AC14LS36P 28-1/4 (724) 37-1/4 (946) 4AC14LS42P... - Page 3 WARNING STEP 2 – REFRIGERANT PIPING – Flushing Existing Line Set and Indoor Coil Fire, Explosion and Personal Safety hazard. Failure to follow this warning could result in IMPORTANT damage, personal injury or death. If this unit is being matched with an approved line set Never use oxygen to pressurize or purge or indoor unit coil that was previously charged with refrigeration lines.
- Page 4 L15 Line Set Model Line Set Length Catalog Number L15-41-20 20 feet (6.1 m) 89J56 4AC14LS18P L15-41-30 30 feet (9.1 m) 89J57 4AC14LS24P 3/8" (10mm) 3/4" (19mm) L15-41-40 40 feet (12.2 m) 89J58 4AC14LS30P L15-41-50 50 feet (15.2 m) 89J59...
- Page 5 STEP 2 – REFRIGERANT PIPING – Removing Existing Indoor Metering Device TYPICAL EXISTING FIXED ORIFICE TYPICAL EXISTING EXPANSION VALVE REMOVAL REMOVAL PROCEDURE PROCEDURE (UNCASED COIL SHOWN) (UNCASED COIL SHOWN) STUB END TWO-PIECE PATCH PLATE LIQUID LINE CHECK DISTRIBUTOR TUBES (UNCASED COIL ONLY) ORIFICE EXPANSION LIQUID LINE ORIFICE HOUSING...
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Page 6: Cap And Core Removal
STEP 2 – 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 7: Braze Line Set
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 8 STEP 2 – REFRIGERANT PIPING – Install Indoor Expansion Valve This outdoor unit is designed for use in systems that use either an fixed orifice (RFC) (included with outdoor unit), or ex- pansion valve metering device (purchased separately) at the indoor coil. See the 4AC14 Product Specifications bulletin (EHB) for approved expansion valve kit matchups.
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Page 9: Step 3 - Leak Test And Evacuation
STEP 3 – 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 10: Evacuate The System
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 11: Electrostatic Discharge
WARNING STEP 4 – ELECTRICAL – Circuit Sizing and Wire Routing Fire Hazard. Use of aluminum wire with this product may result in a fire, causing property damage, severe injury In the U.S.A., wiring must conform with current local codes and the current National Electric Code (NEC). - Page 12 STEP 4 – ELECTRICAL – (Continued) – High Voltage and Field Control Wiring The following illustration provides an example of control wiring connections when using a standard thermostat. ROUTING HIGH VOLTAGE, GROUND AND CONTROL WIRING HIGH VOLTAGE / GROUND WIRES FIELD CONTROL WIRING Any excess high voltage field wiring should be THERMOSTAT...
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Page 13: Step 5 - Unit Start-Up
STEP 5 – UNIT START-UP TABLE 1 TORQUE REQUIREMENTS IMPORTANT Parts Recommended Torque Service valve cap 8 ft.-lb. 11 NM If unit is equipped with a crankcase heater, it should Sheet-metal screws 16 in.-lb. 2 NM be energized 24 hours before unit start-up to prevent compressor damage as a result of slugging. - Page 14 Checking and Adding System Charge OPERATING ANGLE-TYPE SERVICE VALVE 1 - Remove stem cap with an appropriately sized wrench. The 4AC14 unit is factory-charged with enough HFC-410A 2 - Use a service wrench with a hex-head extension (3/16" for liquid refrigerant to accommodate a 15-foot length of refrigerant line valve sizes and 5/16"...
- Page 15 5 - Test capacitor. Replace as necessary. IMPORTANT 6 - Inspect contactor contacts for pitting or burn marks. Sprinklers and soaker hoses should not be installed Replace as necessary. where they could cause prolonged exposure to the 7 - Check outdoor fan motor for worn bearings/ outdoor unit by treated water.
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Page 16: Start Up Checks
4AC14 Start-Up and Performance Checklist Customer Address Indoor Unit Model Serial Outdoor Unit Model Serial Notes: START UP CHECKS Refrigerant Type: Rated Load Amps: Actual Amps Rated Volts Actual Volts Condenser Fan Full Load Amps Actual Amps: COOLING MODE Suction Pressure: Liquid Pressure: Supply Air Temperature: Ambient Temperature: Return Air: Temperature:...
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