user manual

ManualsBrandsLenox ManualsAir ConditionerAir Conditioner XC14

07/11 506636−01

*2P0711* *P506636-01*

Page 1

201 Lennox Industries Inc.

Dallas, Texas, USA

RETAIN THESE INSTRUCTIONS

FOR FUTURE REFERENCE

These instructions are intended as a general guide and do

not supersede local codes in any way. Consult authorities

having jurisdiction before installation.

WARNING

Improper installation, adjustment, alteration, service or

maintenance can cause personal injury, loss of life, or

damage to property.

Installation and service must be performed by a licensed

professional installer (or equivalent) or a 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.

IMPORTANT

This unit must be matched with an indoor coil as speci-

fied in Lennox XC14 Engineering Handbook. Coils pre-

viously charged with HCFC−22 must be flushed.

NOTICE TO INSTALLER

UNIT PLACEMENT

It is critical for proper unit operation to place outdoor unit on an

elevated surface as described in Unit Placement section on page 7.

BRAZING LINE SET TO SERVICE VALVES

It is imperative to follow the brazing technique illustrated starting on

page 12 to avoid damaging the service valve’s internal seals.

INSTALLATION

INSTRUCTIONS

Elite

Series XC14 Units

AIR CONDITIONER

506636−01

07/11

Supersedes 11/10

TABLE OF CONTENTS

General 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Shipping and Packing List 1. . . . . . . . . . . . . . . . . . . . . .

Unit Dimensions 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Model Number Identification 2. . . . . . . . . . . . . . . . . . . .

Unit Parts Arrangement 3. . . . . . . . . . . . . . . . . . . . . . . .

Operating Gauge Set and Service Valves 4. . . . . . . . .

Recovering Refrigerant from Existing System 6. . . . .

Unit Placement 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Removing and Installing Panels 9. . . . . . . . . . . . . . . . .

New or Replacement Line Set 10. . . . . . . . . . . . . . . . . . .

Brazing Connections 12. . . . . . . . . . . . . . . . . . . . . . . . . . .

Flushing Line Set and Indoor Coil 15. . . . . . . . . . . . . . . .

Installing Indoor Metering Device 16. . . . . . . . . . . . . . . .

Leak Test Line Set and Indoor Coil 17. . . . . . . . . . . . . . .

Evacuating Line Set and Indoor Coil 18. . . . . . . . . . . . .

Electrical 19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Servicing Units Delivered Void of Charge 23. . . . . . . . .

Unit Start−Up 23. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

System Refrigerant 23. . . . . . . . . . . . . . . . . . . . . . . . . . . .

System Operation 28. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Maintenance 29. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Start−Up and Performance Checklist 30. . . . . . . . . . . . .

General

The XC14 Air Conditioners, which will also be referred to in

this instruction as the outdoor unit, uses HFC−410A

refrigerant. This outdoor unit must be installed with a

matching indoor unit and line set as outlined in the Lennox

XC14 Engineering Handbook.

Shipping and Packing List

Check the unit for shipping damage and listed times below

are intact. If damaged, or if parts are missing, immediately

contact the last shipping carrier.

1  Assembled outdoor unit.

1  Refrigerant flow control (RFC) kit (Fixed Orifice)

Litho U.S.A.

Summary of content (30 pages)

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INSTALLATION INSTRUCTIONS 201 Lennox Industries Inc. Dallas, Texas, USA Elite® Series XC14 Units AIR CONDITIONER 506636−01 07/11 Supersedes 11/10 Litho U.S.A. TABLE OF CONTENTS RETAIN THESE INSTRUCTIONS FOR FUTURE REFERENCE These instructions are intended as a general guide and do not supersede local codes in any way. Consult authorities having jurisdiction before installation.
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Unit Dimensions − Inches (mm) LIQUID LINE CONNECTION C ELECTRICAL INLETS A SUCTION LINE CONNECTION 4−3/4" (121) 4−1/2" (108) B TOP VIEW SIDE VIEW UNIT SUPPORT FEET UNIT SUPPORT FEET 8−1/2" (216) 9−1/2" (241) D 8−3/4 (222) 8−1/4" (210) E 5−1/2" (140) K J H XC14−024 TO −060 BASE WITH ELONGATED LEGS XC14−018 BASE SECTION Model G F 13−1/2" (343) XC14 Dimensions − in.
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Typical Unit Parts Arrangement CONTROL PANEL SINGLE POLE CONTACTOR−1POLE (K1−1) GROUND LUG DUAL RUN CAPACITOR (C12) THERMAL PROTECTION SWITCH (S173) (ONLY ON −036 AND −060) SWITCH COVER COMPRESSOR DISCHARGE LINE COMPRESSOR HARNESS MUFFLER THERMAL PROTECTION SWITCH (S5) CRANKCASE HEATER THERMOSTAT (S40) (−041, −047, −048 AND −060 UNITS ONLY) LIQUID LINE FILTER DRIER (SINGLE−FLOW) HIGH PRESSURE SWITCH (S4) LIQUID LINE SERVICE VALVE FIELD CONNECTION FOR LIQUID LINE SET FIELD CONNECTION FOR SUCTION
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IMPORTANT WARNING Electric Shock Hazard. Can cause injury or death. Unit must be grounded in accordance with national and local codes. To prevent stripping of the various caps used, the appropriately sized wrench should be used and fitted snugly over the cap before tightening. Table 1. Torque Requirements Line voltage is present at all components when unit is not in operation on units with single-pole contactors. Disconnect all remote electric power supplies before opening access panel.
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Operating Angle Type Service Valve: 1. Remove stem cap with an appropriately sized wrench. 2. Use a service wrench with a hex−head extension (3/16" for liquid line valve sizes and 5/16" for vapor line valve sizes) to back the stem out counterclockwise as far as it will go.
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Recovering Refrigerant from Existing System 1 2 CONNECT MANIFOLD GAUGE SET DISCONNECT POWER Disconnect all power to the existing outdoor unit at the disconnect switch or main fuse box/breaker panel. Connect a gauge set, clean recovery cylinder and a recovery machine to the service ports of the existing unit. Use the instructions provided with the recovery machine to make the connections.
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CLEARANCE ON ALL SIDES INCHES (MILLIMETERS) 6 (152) ACCESS PANEL CONTROL PANEL ACCESS LOCATION 30 (762) 12 (305) NOTES: Clearance to one of the other three sides must be 36 inches (914mm). Clearance to one of the remaining two sides may be 12 inches (305mm) and the final side may be 6 inches (152mm). LINE SET CONNECTIONS 36 (914) MINIMUM CLEARANCE ABOVE UNIT 48 (1219) MINIMUM CLEARANCE BETWEEN TWO UNITS 24 (610) Figure 4.
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DETAIL A Outside Unit Placement Install unit away from windows. DETAIL B Slab Mounting at Ground Level Install unit level or, if on a slope, maintain slope tolerance of two (2) degrees (or two inches per five feet [50 mm per 1.5 m]) away from building structure. BUILDING STRUCTURE MOUNTING SLAB TWO 90° ELBOWS INSTALLED IN LINE SET WILL REDUCE LINE SET VIBRATION.
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ROOF MOUNTING Removing and Installing Panels Install the unit a minimum of 6 inches (152 mm) above the roof surface to avoid ice build−up around the unit. Locate the unit above a load bearing wall or area of the roof that can adequately support the unit. Consult local codes for rooftop applications. IMPORTANT Do not allow panels to hang on unit by top tab. Tab is for alignment and not designed to support weight of panel.
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New or Replacement Line Set REFRIGERANT LINE SET This section provides information on installation or replacement of existing line set. If new or replacement line set is not being installed then proceed to Brazing Connections on page 12. IMPORTANT Lennox highly recommends changing line set when converting the existing system from HCFC−22 to HFC−410A. If that is not possible and the line set is the proper size as reference in table 2, use the procedure outlined under Flushing the System on page 13.
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Line Set Isolation The following illustrations are examples of proper refrigerant line set isolation: REFRIGERANT LINE SET INSTALLING VERTICAL RUNS (NEW CONSTRUCTION SHOWN) REFRIGERANT LINE SET TRANSITION FROM VERTICAL TO HORIZONTAL ANCHORED HEAVY NYLON WIRE TIE OR AUTOMOTIVE MUFFLER-TYPE HANGER NOTE Insulate liquid line when it is routed through areas where the surrounding ambient temperature could become higher than the temperature of the liquid line or when pressure drop is equal to or greate
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Brazing Connections Use the procedures outline in figures 8 and 9 for brazing line set connections to service valves. WARNING Polyol Ester (POE) oils used with HFC−410A refrigerant absorb moisture very quickly. It is very important that the refrigerant system be kept closed as much as possible. DO NOT remove line set caps or service valve stub caps until you are ready to make connections.
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1 CUT AND DEBUR Cut ends of the refrigerant lines square (free from nicks or dents) and debur the ends. The pipe must remain round. Do not crimp end of the line. 2 CAP AND CORE REMOVAL Remove service cap and core from both the suction / vapor and liquid line service ports.
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4 5 6 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 suction / vapor valve stem port.
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Flushing Line Set and Indoor Coil 1A TYPICAL EXISTING FIXED ORIFICE REMOVAL PROCEDURE (UNCASED COIL SHOWN) 1B TYPICAL EXISTING EXPANSION VALVE REMOVAL PROCEDURE (UNCASED COIL SHOWN) OR TWO PIECE PATCH PLATE (UNCASED COIL ONLY) DISTRIBUTOR TUBES LIQUID LINE ORIFICE HOUSING DISTRIBUTOR TUBES STUB END LIQUID LINE ORIFICE HOUSING EXPANSION VALVE TEFLON® RING TEFLON® RING FIXED ORIFICE BRASS NUT TEFLON® RING DISTRIBUTOR ASSEMBLY DISTRIBUTOR ASSEMBLY REMOVE AND DISCARD WHITE TEFLON® SEAL (IF PRESEN
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Installing Indoor Metering Device This outdoor unit is designed for use in systems that use either fixed orifice or expansion valve metering devices at the indoor coil. See the Lennox XC14 Engineering Handbook for approved expansion valve kit match−ups. The expansion valve unit can be installed internal or external to the indoor coil.
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Leak Test Line Set and Indoor Coil IMPORTANT The Environmental Protection Agency (EPA) prohibits the intentional venting of HFC refrigerants during maintenance, service, repair and disposal of appliance. Approved methods of recovery, recycling or reclaiming must be followed. WARNING When using a high pressure gas such as dry nitrogen to pressurize a refrigeration or air conditioning system, use a regulator that can control the pressure down to 1 or 2 psig (6.9 to 13.8 kPa).
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Evacuating Line Set and Indoor Coil CONNECT GAUGE SET 1 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 OUTDOOR set to liquid line service valve UNIT C Connect micron gauge available connector on the 1/4 SAE in−line tee. A D Connect the vacuum pump (with vacuum gauge) to the center port of the manifold gauge set.
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temperatures and pressures present during operation of an air conditioning system. Non−condensables and water suction combine with refrigerant to produce substances that corrode copper piping and compressor parts. IMPORTANT Use a thermocouple or thermistor electronic vacuum gauge that is calibrated in microns. Use an instrument capable of accurately measuring down to 50 microns. Electrical In the U.S.A., wiring must conform with current local codes and the current National Electric Code (NEC).
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XC13 XC13 XC13 XC13 XC13 XC13 XC13 NOTE − Refer to furnace, blower coil and accessory instructions for additional wiring configurations with other optional controls. Figure 14. 24VAC Control Wiring Diagrams (Field Installed) DUAL RUN CAPACITOR (C12) FAN MOTOR (B4) CONTACTOR K1 THERMAL PROTECTION SWITCH (S5) HIGH PRESSURE SWITCH (S4) GROUND LUG COMPRESSOR (B1) −048 AND −060 ONLY CRANKCASE HEATER (HR1) CRANKCASE THERMOSTAT (S40) Figure 15.
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DUAL RUN CAPACITOR (C12) FAN MOTOR (B4) CONTACTOR K1 GROUND LUG HIGH PRESSURE SWITCH (S4) COMPRESSOR (B1) CRANKCASE HEATER (HR1) CRANKCASE THERMOSTAT (S40) THERMAL PROTECTION SWITCH (S5 OR S173) Figure 16.
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Figure 17.
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1. Rotate fan to check for binding. Servicing Units Delivered Void of Charge 2. Inspect all factory− and field−installed wiring for loose connections. If the outdoor unit is void of refrigerant, clean the system using the procedure described below. 1. Leak check system using procedure outlined on page 17. 3. After evacuation is complete, open both the liquid and vapor line service valves to release the refrigerant charge contained in outdoor unit into the system. 2.
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DETERMINING CHARGE METHOD START: Determine how refrigerant is metered WHEN TO CHARGE? Which indoor metering device? Warm weather best Can charge in colder weather CHARGE METHOD? Determine by: Outdoor ambient temperature REQUIREMENTS: FIXED ORIFICE TXV Metering device type 64ºF (17.
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CHECKING AIR FLOW AT INDOOR COIL Check airflow using the Delta−T (DT) process using the illustration in figure 20. Temp. of air entering indoor coil ºF DT 24 23 22 21 72 20 20 19 18 17 17 16 15 15 14 13 12 11 10 70 Wet−bulb ºF 19 19 18 18 17 17 16 15 15 14 13 12 11 10 57 58 59 60 61 62 63 64 65 66 67 68 69 70 A Dry−bulb 80 78 76 74 24 23 22 21 24 23 22 21 23 22 21 20 23 22 21 19 22 21 20 19 22 21 19 18 22 20 19 17 20 19 18 16 19 18 17 16 18 17 16 15 17 16 15 14 16 15 14 13 1.
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START: Measure outdoor ambient temperature 65ºF and ABOVE USE WEIGH-IN METHOD DO NOT CHARGE UNIT Weigh-in orof remove refrigerant (Results charging at low based upon line length temperatures not reliable) 64ºF and BELOW ABOVE or BELOW APPROACH TXV 1. Connect gauge set as illustrated in figure 18. 2. Confirm proper airflow across coil using figure 20. 3. Compare unit pressures with table 4, Normal Operating Pressures. 4.
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USE WEIGH-IN METHOD Weigh-in or remove refrigerant based upon line length 39ºF and BELOW 1. Confirm proper airflow across coil using figure 20. 2. Compare unit pressures with table 4, Normal Operating Pressures. 3. Use SUPERHEAT to correctly charge unit or to verify the charge is correct. 4. Set thermostat to call for heat (must have a cooling load between 70-80ºF (21−26ºC) 5. Connect gauge set. 6. When heat demand is satisfied, set thermostat to call for cooling. 7.
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Table 4. Normal Operating Pressures (Liquid +10 and Suction +5 psig) Use this table to perform maintenance checks; it is not a procedure for charging the system. Minor variations in these pressures may be due to differences in installations. Significant deviations could mean that the system is not properly charged or that a problem exists with some component in the system. IMPORTANT Model −018 −024 −030 −036 −041 −042 −047 −048 −060 **Temp.
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When liquid line temperature drops below 50°F the thermostat closes energizing HR1. The thermostat will open, de−energizing HR1 once liquid line temperature reaches 70°F . Liquid Line Filter Drier A filter drier is factory-installed as illustrated in Unit Dimensions on page 2, with each XC14 unit to ensure a clean, moisture−free system. A replacement filter drier is available from Lennox. Refer to Lennox Repair Part Program.
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at the indoor unit (installed internal or external to the cabinet) or behind a return air grille in the wall or ceiling. Check the filter monthly and clean or replace it as needed. 2. Disposable Filter Disposable filters should be replaced with a filter of the same type and size. NOTE If you are unsure about the filter required for your system, call your Lennox dealer for assistance. 3. Reusable Filter Many indoor units are equipped with reusable foam filters.