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Service Literature
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.
WARNING
Electric Shock Hazard. Can cause injury or death.
Unit must be grounded in accordance with national
and local codes.
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. Unit may
have multiple power supplies.
IMPORTANT
This unit must be matched with an indoor coil as specified in Lennox
Engineering Handbook. Coils previously charged with HCFC−22
must be flushed.
Corp. 0922−L10
10−2009
T−CLASSt
TSA*S4
M and T Voltage Units
Page 1
TABLE OF CONTENTS
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The TSA*S4 is a commercial split-system condensing
unit with SEER ratings up to 14.80.
All major components (indoor blower and coil) must be
matched according to Lennox recommendations for the
compressor to be covered under warranty. Refer to the
Engineering Handbook for approved system matchups.
Information contained in this manual is intended for use by
qualified service technicians only. All specifications are
subject to change. This manual is divided into sections
which discuss the major components, refrigerant
system,
charging
procedure,
operation sequence.
IMPORTANT
This model is designed for use in expansion valve systems only. An
indoor expansion valve approved for use with
must be ordered separately, and installed prior to operating the system.
TSA*S4
M and T Voltages
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10
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15
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18
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22
22
22
27
27
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28
maintenance
and
HFC−410A
refrigerant
2
2
4
5
5
6
8
8
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Related Manuals for Lennox TSA S4 Series
Summary of Contents for Lennox TSA S4 Series
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Page 1: Table Of Contents
IMPORTANT IMPORTANT This unit must be matched with an indoor coil as specified in Lennox This model is designed for use in expansion valve systems only. An Engineering Handbook. Coils previously charged with HCFC−22 indoor expansion valve approved for use with HFC−410A... -
Page 2: Specifications And Electrical Data
Specifications and Electrical Data ONE PHASE General Model No. TSA024S4 TSA030S4 TSA036S4 TSA048S4 TSA060S4 Data Nominal kW (tonnage) 7.0 (2) 8.8 (2.5) 10.5 (3) 14.1 (4) 17.6 (5) Connections Liquid line o.d. − in. (sweat) Suction line o.d. − in. 1−1/8 1.98 kg 1.93 kg... - Page 3 Heating Air Conditioning and Refrigeration type circuit breaker or fuse. Refer to local codes to determine wire, fuse and disconnect size requirements. OPTIONAL ACCESSORIES − must be ordered separately For update−to−date information, see any of the following publications: Lennox TSA*S4 Engineering Handbook Lennox Commerical Price Book Page 3...
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Page 4: Unit Dimensions
Unit Dimensions −− Inches (mm) OUTDOOR COIL FAN Discharge Air COMPRESSOR SUCTION AND LIQUID LINE CONNECTIONS OPTIONAL UNIT STAND-OFF KIT (4) (FIELD−INSTALLED) SIDE VIEW VIEW Model Number TSA024S4N41T and M 24−1/4 (616) 25−1/4 (641) TSA030S4N41T and M 24−1/4 (616) 29−1/4 (743) TSA036S4N41M 28−1/4 (724) 29−1/4 (743) -
Page 5: Typical Unit Parts Arrangement
Typical Unit Parts Arrangement NOTE: PLUMBING LAYOUT MAY VARY SLIGHTLY BETWEEN MODEL SIZES. COMPRESS0R DISCHARGE LINE OUTDOOR COIL COMPRESSOR HARNESS SUCTION LINE SERVICE VALVE HIGH PRESSURE SWITCH (S4) LIQUID LINE SERVICE VALVE Model Number Identification T S A 036 S Voltage Brand/Family M = 380/420V−3 phase 50hz... -
Page 6: Unit Components
Unit Components CONTROL BOX TSA*S4 units are not equipped with a 24V transformer. All 24 VAC controls are powered by the indoor unit. Refer to wiring diagram. Electrical openings are provided under the control box ALIGN FAN HUB FLUSH WITH END OF SHAFT cover. - Page 7 The liquid is worked toward the center of the scroll and is discharged. If the Figure 3. Scroll Compressor compressor is replaced, conventional Lennox cleanup practices must be used. DISCHARGE Due to its efficiency, the scroll compressor is capable of...
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Page 8: General Information
Using an Allen wrench rated at less than 50Rc risks Figure 6. Scroll Form rounding or breaking off the wrench, or stripping the valve stem recess. See the Lennox Service and Application Notes #C−08−1 for further details and information. IMPORTANT... - Page 9 SERVICE VALVES SERVICE PORT CAP SERVICE PORT VARIOUS TYPES SERVICE PORT CORE (VALVE STEM SHOWN OPEN TO BOTH INDOOR AND CLOSED) INSERT HEX OUTDOOR UNITS WRENCH HERE SERVICE PORT CAP VALVE STEM FRONT-SEATED SERVICE PORT SERVICE PORT CORE TO INDOOR (VALVE STEM UNIT SHOWN OPEN)
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Page 10: Recovering Refrigerant From Existing System
Recovering Refrigerant from Existing System RECOVERING REFRIGERANT FROM SYSTEM DISCONNECT POWER CONNECT MANIFOLD GAUGE SET Disconnect all power to the existing outdoor unit at the disconnect Connect a gauge set, clean recovery cylinder and a recovery switch or main fuse box/breaker panel. machine to the service ports of the existing unit. -
Page 11: New Outdoor Unit Placement
New Outdoor Unit Placement See Unit Dimensions on Page3 for sizing mounting slab, INSTALL UNIT AWAY FROM WINDOWS platforms or supports. Refer to Figure 9 for mandatory installation clearance requirements. TWO 90° ELBOWS INSTALLED IN LINE SET WILL REDUCE LINE SET VIBRATION. Figure 10. -
Page 12: New Or Replacement Line Set
The RFC1−metering line consisted of a small bore copper the coil and line set must be flushed prior to installation. Take care to empty all existing traps. Polyol ester (POE) oils are used in Lennox line that ran from condenser to evaporator coil. Refrigerant units charged with HFC−410A refrigerant. - Page 13 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 TRANSITION...
- Page 14 BRAZING NOTE − Use silver alloy brazing rods with five or six percent minimum silver alloy for copper−to−copper brazing, 45 percent alloy for copper−to−brass and copper−to−steel brazing. CONNECTIONS CAP AND CORE REMOVAL Remove service cap and core CUT AND DEBUR from both the vapor and liquid line service ports.
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Page 15: Metering Devices And Flushing The System
Metering Devices and Flushing the System TYPICAL EXPANSION VALVE REMOVAL AND FLUSHING REPLACEMENT PROCEDURE (Uncased Coil Shown) LINE SET AND INDOOR COIL STUB END TWO PIECE PATCH PLATE LIQUID LINE EXPANSION (UNCASED COIL ONLY) ORIFICE VALVE TYPICAL FIXED ORIFICE REMOVAL HOUSING DISTRIBUTOR TUBES... -
Page 16: Testing For Leaks
Leak Testing the System LEAK TEST LINE SET AND INDOOR COIL NOTE Normally, the high pressure hose is connected to the liquid line port. How- ever, connecting it to the vapor port better protects the manifold gauge set from high pressure damage. -
Page 17: Evacuating The System
Evacuating the System EVACUATING MANIFOLD GAUGE SET LINE SET AND INDOOR COIL CONNECT GAUGE SET HIGH NOTE Remove cores from service valves (if not al- ready done). Connect low side of manifold gauge set with 1/4 SAE in−line tee to vapor line service valve A34000 1/4 SAE TEE WITH Connect high side of manifold gauge... -
Page 18: Electrical Connections
an air conditioning system. Non−condensables and water IMPORTANT suction combine with refrigerant to produce substances that corrode copper piping and compressor parts. Use a thermocouple or thermistor electronic vacuum gauge that is calibrated in microns. Use an instrument capable of accurately Electrical measuring down to 50 microns. - Page 19 ROUTING HIGH VOLTAGE/ GROUND AND CONTROL WIRING HIGH VOLTAGE / GROUND WIRES Any excess high voltage field wiring should be trimmed and secured away from any low voltage field wiring. To facilitate a conduit, a cutout is located in the bottom of the control panel. Connect conduit to the control panel using a proper conduit fitting. THREE PHASE HIGH VOLTAGE CONNECTIONS...
- Page 20 Typical Field Wiring Diagram M Voltage 380/420v (3PH) 50Hz Figure 15. NOTE− The thermostat used may be electromechanical or END OF COOLING DEMAND: electronic. 4. Cooling demand is satisfied. Terminal Y1 is NOTE− Transformer in indoor unit supplies power (24 de-energized.
- Page 21 Typical Field Wiring Diagram T Voltage 220/240v (1PH) 50Hz Figure 16. NOTE− The thermostat used may be electromechanical or END OF COOLING DEMAND: electronic. 4. Cooling demand is satisfied. Terminal Y1 is NOTE− Transformer in indoor unit supplies power (24 de-energized.
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Page 22: Servicing Unit Delivered Void Of Charge
GAUGE SET MANIFOLD GAUGE SET CONNECTIONS FOR TESTING AND CHARGING HIGH SUCTION LINE SERVICE PORT CONNECTION OUTDOOR UNIT REFRIGERANT TANK CHARGE IN LIQUID PHASE DIGITAL SCALE TEMPERATURE SENSOR (LIQUID LINE) TO LIQUID LINE SERVICE VALVE TEMPERATURE SENSOR Close manifold gauge set valves and connect the center hose to a cylinder of HFC−410A. Set for liquid phase charging. Connect the manifold gauge set’s low pressure side to the suction line service port. - Page 23 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 24 START: Determine how refrigerant is metered WHEN TO CHARGE? Warm weather best Can charge in colder weather CHARGE METHOD? Determine by: OUTDOOR AMBIENT Metering device type TEMPERATURE Outdoor ambient temperature REQUIREMENTS: 65ºF (18.3ºC) 64ºF (17.7ºC) AND ABOVE Sufficient heat load in structure AND BELOW Indoor temperature between 70-80ºF (21−26ºC) Manifold gauge set connected to unit...
- Page 25 65ºF 1. Confirm proper airflow across coil using Figure START: Measure outdoor ambient temperature (18.3ºC) 2. Compare unit pressures with Table 5 or 6. ABOVE USE WEIGH-IN METHOD DO NOT CHARGE UNIT 3. Set thermostat to call for heat (must have a cooling load between 70-80ºF (21−26ºC) ABOVE or Weigh-in or remove refrigerant...
- Page 26 Use this Table to perform maintenance checks; it is not a procedure for charging the system. Minor variations IMPORTANT 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. Table 5.
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Page 27: System Operation
Unit may have multiple power supplies. Indoor Unit 1. Clean or change filters. WARNING 2. Lennox blower motors prelubricated Improper installation, adjustment, alteration, service or maintenance can permanently sealed. No more lubrication is needed. cause personal injury, loss of life, or damage to property. -
Page 28: 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 Electrical Connections Tight? - Indoor Filter clean? - Supply Voltage (Unit Off) Indoor Blower RPM...